Patent Publication Number: US-8978071-B2

Title: Multi-purpose display device having a channel scan interface and method for controlling the same

Description:
CROSS-REFERENCE TO RELATED APPLICATION(S) 
     This application claims the benefit of the U.S. Provisional Application No. 61/441,632, filed on Feb. 10, 2011, the U.S. Provisional Application No. 61/479,865, filed on Apr. 28, 2011 and Korean Patent Application No. 10-2011-0086600, filed in Korea on Aug. 29, 2011, which are hereby incorporated by reference in its entirety. 
    
    
     BACKGROUND 
     1. Field 
     A multi-functional display device having a channel scan interface and a method for controlling the same are disclosed herein. 
     2. Background 
     Multi-functional display devices and methods for controlling the same are known. However they suffer from various disadvantages. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The embodiments will be described in detail with reference to the following drawings in which like reference numerals refer to like elements wherein: 
         FIG. 1  is a schematic diagram illustrating a configuration of an exemplary embodiment for a broadcast system in accordance with the present invention; 
         FIG. 2  is a block diagram illustrating a configuration of an exemplary embodiment for a server in accordance with the present invention; 
         FIG. 3  is a block diagram illustrating a configuration of an exemplary embodiment for an electronic device in accordance with the present invention; 
         FIG. 4  is a diagram illustrating an exemplary embodiment of a screen on which a Web page of a Social Network Service (SNS) is displayed; 
         FIG. 5  is a diagram illustrating a screen on which an exemplary embodiment of a Graphical User Interface (GUI) for designation of a human address is displayed; 
         FIG. 6  is a diagram illustrating a screen on which an exemplary embodiment of a GUI for designation of a channel number is displayed; 
         FIG. 7  is a diagram illustrating one example of a screen on which the result of assigning a human address to a channel number is displayed; 
         FIG. 8  is a diagram illustrating an exemplary embodiment of a screen on which a menu is displayed; 
         FIG. 9  is a diagram illustrating a screen on which another exemplary embodiment of a GUI for designation of a human address is displayed; 
         FIG. 10  is a diagram illustrating a screen on which another exemplary embodiment of a GUI for designation of a human address is displayed; 
         FIG. 11  is a diagram illustrating a screen on which a further exemplary embodiment of a GUI for designation of a human address is displayed; 
         FIG. 12  is a diagram illustrating an exemplary embodiment for a human channel map; 
         FIG. 13  is a flowchart illustrating an implementation procedure of one exemplary embodiment for a method of constructing a human channel map in accordance with the present invention; 
         FIG. 14  is a flowchart illustrating an implementation procedure of another exemplary embodiment for a method of constructing a human channel map in accordance with the present invention; 
         FIG. 15  is a diagram illustrating one exemplary embodiment of a screen on which a human channel map and content of a selected human channel are displayed; 
         FIG. 16  is a diagram illustrating another exemplary embodiment of a screen on which a human channel map and content of a selected human channel are displayed; 
         FIG. 17  is a diagram illustrating a further exemplary embodiment of a screen on which a human channel map and content of a selected human channel are displayed; 
         FIG. 18  is a diagram illustrating an implementation procedure of an exemplary embodiment for a method of providing a human channel service in accordance with the present invention; 
         FIG. 19  is a diagram illustrating an implementation procedure of one exemplary embodiment for a method of receiving content of a human channel; 
         FIG. 20  is a diagram illustrating an implementation procedure of another exemplary embodiment for a method of receiving content of a human channel; 
         FIG. 21  is a diagram illustrating an implementation procedure of a further exemplary embodiment for a method of receiving content of a human channel; 
         FIG. 22  is a diagram illustrating a method of setting up connection between two electronic devices; 
         FIG. 23  is a schematic diagram illustrating a configuration of another exemplary embodiment of a broadcast system in accordance with the present invention; 
         FIG. 24  is a diagram illustrating an exemplary embodiment of a Network Address Translation (NAT) table; 
         FIG. 25  is a diagram illustrating an exemplary embodiment of an address matching table recorded in a server; 
         FIG. 26  is a diagram illustrating an implementation procedure of an exemplary embodiment for a method of setting up connection between two electronic devices; 
         FIG. 27  is a diagram illustrating a screen on which one exemplary embodiment of a GUI for setting up a human channel is displayed; 
         FIG. 28  is a diagram illustrating a screen in a state in which a human address is being dragged on the displayed GUI of  FIG. 27 ; 
         FIG. 29  is a diagram illustrating a screen on which another exemplary embodiment of a GUI for setting up a human channel is displayed; 
         FIG. 30  is a diagram illustrating a screen in a state in which a human address is being dragged on the displayed GUI of  FIG. 29 ; 
         FIG. 31  is a diagram illustrating a screen on which an exemplary embodiment of a GUI for setting up a channel is displayed; 
         FIG. 32  is a diagram illustrating a screen in a state in which a human address is being dragged on the displayed GUI of  FIG. 31 ; 
         FIG. 33  is a diagram illustrating a screen in a state in which a broadcast channel, a human address and an App channel are dragged onto a channel number region of the displayed GUI of  FIG. 31 ; 
         FIGS. 34A and 34B  are flowcharts illustrating an implementation procedure of a further exemplary embodiment for a method of constructing a channel map in accordance with the present invention; 
         FIG. 35  is a diagram illustrating an exemplary embodiment of a broadcast screen on which a human channel map is displayed; 
         FIG. 36  is a diagram illustrating an exemplary embodiment of a screen for invitation to view a channel; 
         FIG. 37  is a schematic diagram illustrating a configuration of another exemplary embodiment of a broadcast system in accordance with the present disclosure; 
         FIG. 38  is a diagram illustrating a configuration of an exemplary embodiment for a channel invitation packet; 
         FIG. 39  is a diagram illustrating an exemplary embodiment of a screen displayed when invitation to view a channel is made; 
         FIG. 40  is a diagram illustrating one exemplary embodiment of a guidance message with regard to invitation to view a channel; 
         FIG. 41  is a diagram illustrating another exemplary embodiment of a guidance message with regard to invitation to view a channel; 
         FIG. 42  is a diagram illustrating a further exemplary embodiment of a guidance message with regard to invitation to view a channel; 
         FIGS. 43A and 43B  are diagrams illustrating an exemplary embodiment of a screen displayed when invitation to view a channel is accepted; 
         FIG. 44  is a diagram illustrating an exemplary embodiment of a channel matching table; 
         FIG. 45  is a diagram illustrating an implementation procedure of one exemplary embodiment for a method of making invitation to view a channel in accordance with the present disclosure; 
         FIG. 46  is a flowchart illustrating an implement procedure of another exemplary embodiment for a method of making invitation to view a channel in accordance with the present disclosure; and 
         FIG. 47  is a flowchart illustrating an implement procedure of an exemplary embodiment for a method of processing invitation to view a channel in accordance with the present disclosure. 
         FIG. 48  is a diagram illustrating an embodiment of a screen on which content is displayed; 
         FIG. 49  is a diagram illustrating one embodiment of a screen on which content is displayed in a simultaneous viewing mode; 
         FIG. 50  is a diagram illustrating another embodiment of a screen on which content is displayed in a simultaneous viewing mode; 
         FIG. 51  is a diagram illustrating a further embodiment of a screen on which content is displayed in a simultaneous viewing mode; 
         FIG. 52  is a diagram explaining an embodiment of a method for confirming viewing of the same content; 
         FIG. 53  is a diagram explaining a method for detecting user emotions; 
         FIG. 54  is a diagram illustrating the contour of a silhouette mapped to user emotions; 
         FIG. 55  is a diagram illustrating an embodiment of a screen on which different silhouettes depending on user emotions are displayed; 
         FIG. 56  is a diagram explaining a procedure for registering a facial image; 
         FIG. 57  is a diagram explaining a procedure for training a facial image; 
         FIG. 58  is a diagram explaining a method for detecting a user motion; 
         FIGS. 59A to 59D  are diagrams explaining a method for reflecting a screen effect on content; 
         FIG. 60  is a flowchart illustrating an implementation procedure of an exemplary embodiment in relation to a method for remotely viewing content at the same time; 
         FIG. 61  is a flowchart illustrating an implementation procedure of another exemplary embodiment in relation to a method for remotely viewing content at the same time; 
         FIG. 62  is a flowchart illustrating an implementation procedure of another exemplary embodiment in relation to a method for remotely viewing content at the same time; 
         FIG. 63  is a flowchart illustrating an implementation procedure of a further exemplary embodiment in relation to a method for remotely viewing content at the same time; 
         FIG. 64  is a flowchart illustrating an implementation procedure of an exemplary embodiment in relation to a method for confirming viewing of the same content; 
         FIG. 65  is a flowchart illustrating an implementation procedure of another exemplary embodiment in relation to a method for confirming viewing of the same content; 
         FIG. 66  is a flowchart illustrating an implementation procedure of an exemplary embodiment in relation to a method for providing a viewing list; 
         FIG. 67  is a flowchart illustrating an implementation procedure of an exemplary embodiment in relation to a method for displaying a silhouette; 
         FIG. 68  is a flowchart illustrating an implementation procedure of another exemplary embodiment in relation to a method for displaying a silhouette; 
         FIG. 69  is a flowchart illustrating an implementation procedure of an exemplary embodiment in relation to a method for displaying a silhouette as a 3D image; 
         FIG. 70  is a flowchart illustrating an implementation procedure of an exemplary embodiment in relation to a method for sharing a screen effect; 
         FIG. 71  is a diagram illustrating a broadcast screen on which one exemplary embodiment of a channel map is displayed; 
         FIG. 72  is a diagram illustrating a broadcast screen on which another exemplary embodiment of a channel map is displayed; 
         FIG. 73  is a diagram illustrating a broadcast screen on which a further exemplary embodiment of a channel map is displayed; 
         FIG. 74  is a diagram illustrating a screen on which one exemplary embodiment of a full channel map is displayed; 
         FIG. 75  is a diagram illustrating a screen on which another exemplary embodiment of a full channel map is displayed; 
         FIG. 76  is a diagram illustrating a screen on which another exemplary embodiment of a full channel map is displayed; 
         FIG. 77  is a diagram illustrating a screen on which a human channel sheet of the full channel map of  FIG. 76  is displayed; 
         FIG. 78  is a diagram illustrating a screen on which an App channel sheet of the full channel map of  FIG. 76  is displayed; 
         FIG. 79  is a diagram illustrating a screen on which an exemplary embodiment of a recently viewed channel map is displayed; 
         FIG. 80  is a diagram illustrating a screen on which a further exemplary embodiment of a full channel map is displayed; 
         FIGS. 81A to 81D  are a diagrams explaining a connection state of an owner of a human channel; and 
         FIG. 82  is a flowchart illustrating an implement procedure of an exemplary embodiment for a method of providing a channel map service in accordance with the present disclosure. 
         FIG. 83  is a flowchart illustrating an implementation procedure of an exemplary embodiment in relation to a user registration method in accordance with the present disclosure; 
         FIG. 84  is a diagram illustrating an embodiment of a GUI to receive user registration information; 
         FIG. 85  is a diagram illustrating an embodiment of a GUI to select an SNS site; 
         FIG. 86  is a diagram illustrating an embodiment of a GUI to receive authentication information for an SNS site; 
         FIG. 87  is a diagram illustrating an embodiment of a GUI to confirm execution of a channel scan; 
         FIG. 88  is a flowchart illustrating an implementation procedure of an exemplary embodiment in relation to a method for providing a channel scan interface in accordance with the present disclosure; 
         FIG. 89  is a diagram illustrating an embodiment of a GUI to select a scan method; 
         FIG. 90  is a diagram illustrating an embodiment of a GUI to select a service type; 
         FIG. 91  is a diagram illustrating an embodiment of a screen which displays the progress of a human channel scan; 
         FIG. 92  is a diagram illustrating an embodiment of a screen which displays the result of a human channel scan; 
         FIG. 93  is a diagram illustrating another embodiment of a screen which displays the result of a human channel scan; 
         FIG. 94  is a flowchart illustrating an implementation procedure of an exemplary embodiment in relation to a method for scanning a human channel in accordance with the present disclosure; 
         FIG. 95  is a flowchart illustrating an implementation procedure of another exemplary embodiment in relation to a method for constructing a channel map in accordance with the present disclosure; 
         FIG. 96  is a diagram illustrating an embodiment of a GUI for display of other human addresses of a friend who has a human address associated with a channel number; 
         FIG. 97  is a diagram illustrating another exemplary embodiment for a human channel map; 
         FIG. 98  is a flowchart illustrating an implementation procedure of another exemplary embodiment in relation to a method for providing a human channel service in accordance with the present disclosure; 
         FIG. 99  is a diagram illustrating an embodiment of a GUI for designation of a human address; 
         FIG. 100  is a diagram illustrating another embodiment of a screen on which a human channel map and content of a selected human channel are displayed; 
         FIG. 101  is a diagram illustrating an embodiment of a screen on which an Electronic Program Guide (EPG) for a human channel in accordance with the present disclosure is displayed; 
         FIG. 102  is a diagram illustrating an embodiment of a screen in which detailed information about an event is displayed on an electronic program guide in accordance with the present disclosure is displayed; 
         FIG. 103  is a diagram illustrating an embodiment of a screen in which channel numbers are selected on an electronic program guide in accordance with the present disclosure; 
         FIG. 104  is a diagram illustrating an embodiment of a screen on which content of a human channel is displayed; 
         FIGS. 105 to 107  are diagrams illustrating an embodiment in which an electronic program guide in accordance with the present disclosure is dragged; 
         FIG. 108  is a diagram illustrating an embodiment of a screen on which a content list is displayed on an electronic program guide in accordance with the present disclosure; 
         FIG. 109  is a diagram illustrating an embodiment of a screen on which a preview of content selected from among the content list of  FIG. 108  is displayed; 
         FIG. 110  is a diagram illustrating an embodiment of a screen on which a graphical user interface to produce an event is displayed; 
         FIG. 111  is a diagram illustrating an embodiment of a screen in which an event input into the graphical user interface of  FIG. 110  is displayed; 
         FIGS. 112A and 112B  are diagrams illustrating a screen on which an electronic program guide in accordance with the present disclosure, which reflects the event input in  FIG. 111 , is displayed; 
         FIG. 113  is a diagram illustrating an implementation procedure of an exemplary embodiment in relation to a method for providing service information in accordance with the present disclosure; 
         FIG. 114  is a diagram illustrating an implementation procedure of an exemplary embodiment in relation to a method for constructing service information in accordance with the present disclosure; 
         FIG. 115  is a diagram illustrating an implementation procedure of an exemplary embodiment in relation to a method for displaying service information in accordance with the present disclosure; and 
         FIG. 116  is a diagram illustrating an implementation procedure of an exemplary embodiment in relation to a method for producing an event in accordance with the present disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     An electronic device as disclosed herein may be a multi-functional display device. The multi-functional display device may be a television or a Smart TV that includes a broadcast receiver. The broadcast receiver may include, for example, a function for receiving and processing a broadcast image viewable by a user. The broadcast receiver may display a broadcast, which is selected by the user from among broadcast signals transmitted from a broadcast station, on a display. Broadcasts may be transitioned from analog broadcasting to digital broadcasting. 
     Digital broadcasting may refer to digital audio and video signal broadcast. Digital broadcasting has low data loss due to robustness against external noise, favorable error correction, high resolution, and high-definition screen as compared with analog broadcasting. In addition, digital broadcasting may provide a bidirectional service unlike analog broadcasting. 
     In addition to providing digital broadcasting, the broadcast receiver may provide a Social Network Service (SNS). SNS may refer to a service for establishing and maintaining online social networks among various individuals and may enable personal media and information sharing. Examples of SNS may include Twitter, MySpace, and facebook widely used in America as well as Cyworld and Me2 Day used in Korea, among others. SNS may be used for communication and information sharing among users. SNS assists users in making new connections or reinforcing existing connections with other users. 
     An electronic device as set forth herein is an intelligent electronic device equipped with a computer support function in addition to a broadcasting reception function, for example. Since an Internet function is added to a broadcasting reception function, the electronic device may have an interface which is more convenient than a hand-writing input device, a touch screen, a touch pad, or a remote controller. Further, because the electronic device supports wired or wireless Internet, the electronic device may include e-mail transmission/reception, Web browsing, banking, and gaming functions and the like when connected to the Internet or a computer. To implement these functions, the electronic device may operate based on a standard, general-purpose Operating System (OS). 
     Various applications may be freely added to or deleted from, for example, a general-purpose OS kernel of the electronic device according to the present disclosure. Therefore, the electronic device may perform a number of user-friendly functions. The electronic device may be a network TV, a Hybrid Broadcast Broadband TV (HBBTV), a smart TV, an Open Hybrid TV (OHTV), etc. and as occasion demands, is applicable to smart phones, Personal Computers (PC) and home appliances. 
     Embodiments of the present disclosure will be described in detail with reference to the attached drawings, but it should be understood that they are merely illustrative of the present disclosure and should not be interpreted as limiting the scope of the present disclosure. 
     In addition, although the terms used in the present disclosure are selected from generally known and used terms, some of the terms mentioned in the description of the present disclosure, the detailed meanings of which are described in relevant parts of the description herein, have been selected at the discretion of the applicant. Furthermore, the present disclosure must be understood, not simply by the actual terms used but by the meanings of each term lying within. Accordingly, the terms used herein should be understood not simply by the actual terms used but by the meaning lying within and the description disclosed herein. 
       FIG. 1  is a schematic diagram illustrating a configuration of an exemplary embodiment for a broadcast system in accordance with the present disclosure. 
     Referring to  FIG. 1 , the broadcast system  1  in accordance with the present disclosure may include a first server  10 , a second server  20 , a first digital TV  100 , a second digital TV  110 , a personal computer system  120 , a notebook computer  130  and a mobile terminal  140 . The first server  10 , the second server  20 , the first digital TV  100 , the second digital TV  110 , the personal computer system  120 , the notebook computer  130  and the mobile terminal  140  may be connected to one another via a network  2 . Broadcast system  1  may include other appropriate types of multi-functional display devices in addition to the examples as shown in  FIG. 1 . 
     The network  2  may include a backbone network and an access network. The backbone network may include an X.25 network, a frame relay network, an Asynchronous Transfer Mode (ATM) network, a Multi Protocol Label Switching (MPLS) network and a Generalized Multi Protocol Label Switching (GMPLS) network, alone or in combination. The access network may be a Fiber To The Home (FTTH) network, an Asymmetric Digital Subscriber Line (ADSL) network, a cable network, a wireless LAN (IEEE 802.11b, IEEE 802.11a, IEEE 802.11g, IEEE 802.11n) network, a Wireless Broadband (WIBro) network, a WiMax network and a High Speed Downlink Packet Access (HSDPA) network. In some embodiments, the network  2  may be an Internet network or mobile communication network. 
     The first server  10  may provide a service for connection between the first digital TV  100 , the second digital TV  110 , the personal computer system  120 , the notebook computer  130  and the mobile terminal  140 . The first server  10  may provide User Datagram Protocol (UDP) hole punching. In addition, the first server  10  may have a static IP address. The first digital TV  100 , the second digital TV  110 , the personal computer system  120 , the notebook computer  130  and the mobile terminal  140  may be connected to the first server  10  using the static IP address. 
     The second server  20  may provide the first digital TV  100 , the second digital TV  110 , the personal computer system  120 , the notebook computer  130  and the mobile terminal  140  with a human channel service. Here, a human channel refers to a communication channel for transmission of content provided by an individual. The human channel may refer to an identification sign for identification of the communication channel in terms of a user, and may refer to a communication channel corresponding to a channel number mapped to a human address in terms of a device, i.e. a communication channel accessible using the human address. As broadly described herein the human channel service may include, for example, a service to provide access to a Social Network Service (SNS) provided by an SNS service provider on a channel of a multi-functional display device (e.g., a social network channel service or SNS channel service). The human channel may be a particular channel on the multi-functional display device (e.g., digital TV) for accessing an SNS account for an individual or an entity. The human channel may also be referred to as a social network channel or SNS channel. A human channel may be associated with a channel number similar to a conventional broadcast channel on the multi-functional display device (e.g., digital TV), but unlike the broadcast channel, the human channel is also associated with a human address that identifies an SNS account. 
     The human address as broadly described herein refers to an identification character string for identification of a human or individual. The human address may also be referred to herein as an SNS identifier or a user identifier. The human address may correspond to a channel assigned to an individual, a group of individuals, or an entity and may be referred to as an SNS channel name. The human address may include at least one of an e-mail address, an account name, a family name and a Session Initiation Protocol-Uniform Resource Locator (SIP-URL), or another appropriate type of identifier or address. The human address may be an address or identifier given to a human or individual and is different from an address assigned to an electronic device. For example, the human address may include an SNS address for an individual or user (e.g., a social network address or SNS address). Moreover, the human address may include multiple SNS addresses for a particular user (e.g., a user&#39;s facebook and twitter accounts), or multiple SNS addresses for a group of users (e.g., dad&#39;s facebook account and mom&#39;s facebook account). As described above, the human channel service may refer to a service for providing a human channel of at least one individual. The second server  20  may be a conventional Social Network Service (SNS) server. 
     The first digital TV  100  and the second digital TV  110  may be a network TV, a smart TV, an HBBTV, a 3-dimensional (3D) TV, an OHTV, etc. 
     The personal computer system  120  may be a desktop, computer, a laptop computer, a tablet, a handheld computer, etc. 
     The mobile terminal  140  may be a cellular phone, a smart phone, a Digital Multimedia Broadcasting (DMB) terminal, a Personal Digital Assistant (PDA), a Portable Multimedia Player (PMP), a navigator, etc. 
     The first digital TV  100 , the second digital TV  110 , the personal computer system  120 , the notebook computer  130  and the mobile terminal  140  may serve not only as a subject for providing the human channel service, but also as an object affected by the human channel service of the second server  20  or another first digital TV  100 , second digital TV  110 , personal computer system  120 , notebook computer  130  and mobile terminal  140 . 
     The first digital TV  100 , the second digital TV  110 , the personal computer system  120 , the notebook computer  130  and the mobile terminal  140  may have a static IP address or a dynamic IP address, or may have a private IP address. 
     The first digital TV  100 , the second digital TV  110 , the personal computer system  120 , the notebook computer  130  and the mobile terminal  140  may receive a dynamic IP address or a private IP address from the first server  10 , if a device for providing a human channel has the dynamic IP address or the private IP address. 
     Alternatively, if the device has a static IP address, the user may input the static IP address to the first digital TV  100 , the second digital TV  110 , the personal computer system  120 , the notebook computer  130  and the mobile terminal  140 . 
       FIG. 2  is a block diagram illustrating a configuration of an exemplary embodiment for a server in accordance with the present disclosure. 
     Referring to  FIG. 2 , a server  200  may function as the first server  10  or the second server  20 , or may perform functions of both the first and second servers  10  and  20 . The server  200  may include a communication unit  210 , a controller  220  and a storage unit  230  (or storage device). 
     The communication unit  210  may receive packets transmitted through the network  2  and may transmit the packets to the first digital TV  100 , the second digital TV  110 , the personal computer system  120 , the notebook computer  130  and the mobile terminal  140  through the network  2 . The packets may be transmitted by a Session Initiation Protocol (SIP), User Datagram Protocol (UDP) and Transmission Control Protocol (TCP). The packets may include registration request signals, response signals, connection request signals, connection set-up signals, moving image streaming, Web pages and files. 
     The controller  220  may control transmission of the packets by the communication unit  210  based on at least one protocol of SIP, Simple Mail Transfer Protocol (SMTP), Hypertext Transfer Protocol (HTTP), File Transfer Protocol (FTP), Real-Time Streaming Protocol (RTSP) and Multi Media Streaming (MMS). 
     The controller  220  may control storing an address of an electronic device which transmits a registration request signal and a human address included in the registration request signal to the storage unit  230 , in response to the received registration request signal. The address of the electronic device and the human address may be stored in association with each other. The controller  220  may extract the address of the electronic device from the registration request signal or from the packet including the registration request signal. The address of the electronic device may include at least one of a Media Access Control (MAC) address, an IP address, a port number, a Domain Name System (DNS) name and a URL. The IP address may include a static IP address, a dynamic IP address and a private IP address. 
     The controller  220  reads an address of an electronic device associated with a human address included in a connection request signal from the storage unit  230 , in response to the received connection request signal. The controller  220  controls transmission of the read address of the electronic device to an electronic device which issues the connection request signal. Also, the controller  220  may control transmission of an address of the electronic device which issues the connection request signal to the electronic device, the address of which has been read. 
     The storage unit  230  may store the address of the electronic device address and the human address. The address of the electronic device address and the human address may be stored in association with each other. 
       FIG. 3  is a block diagram illustrating a configuration of an exemplary embodiment for an electronic device in accordance with the present disclosure. 
     Referring to  FIG. 3 , the electronic device  300  may function as at least one of the first broadcast receiver  100 , the second broadcast receiver  110 , the personal computer system  120 , the notebook computer  130  and the mobile terminal  140 . 
     The electronic device  300  may include a tuner  305 , a demodulator  310 , a demultiplexer  315 , a network interface  320 , an external signal input unit  325 , a video decoder  330 , an audio decoder  335 , a controller  340 , a storage unit  345 , a scaler  350 , a mixer  360 , a formatter  370 , a communication unit  380  and a sound sensor  390 . The electronic device  300  may further include an image capture device  301 , a display  302 , spectacles  303  and a remote controller  304 . 
     The tuner  305  selects a Radio Frequency (RF) broadcast signal corresponding to a channel selected by the user from among RF broadcast signals transmitted through an antenna and converts the selected RF broadcast signal into an Intermediate Frequency (IF) signal or a base-band video or audio signal. 
     The demodulator  310  receives a Digital IF (DIF) signal converted by the tuner  305  and demodulates the DIF signal. 
     The demodulator  310  may also perform channel decoding. To this end, the demodulator  310  may include a Trellis decoder, a deinterleaver and a Reed Solomon decoder, to perform Trellis decoding, deinterleaving and Reed-Solomon decoding. 
     The demodulator  310  may output a Transport Stream (TS) signal after performing demodulation and channel decoding. An audio signal, a video signal or a data signal may be multiplexed in the TS signal. 
     The demultiplexer  315  may receive a stream signal from the demodulator  310 , the network interface  320  and the external signal input unit  325 . The demultiplexer  315  may demultiplex the received stream signal to a video signal, an audio signal and a data signal to output the demultiplexed signal to the video decoder  330 , the audio decoder  335  and the controller  340 . 
     The video decoder  330  receives a video signal from the demultiplexer  315  and restores the received video signal to output the restored video signal to the scaler  350 . The video signal may include a 3D video signal. 
     The audio decoder  335  receives an audio signal from the demultiplexer  315  and restores the received audio signal to output the restored audio signal to the display  302  or the scaler  350 . 
     The network interface  320  receives the packets from the network  2  and transmits the packets to the network  2 . The network interface  320  may transmit a registration request signal and a connection request signal to the server  10  and may receive a response signal with respect to the transmitted registration request signal and connection request signal from the server  10 . The registration request signal may include a human address, an address of the electronic device  300 , an Identifier (ID) and a password. The connection request signal may include a human address. 
     The network interface  320  may receive content from the second server  20 , the first digital TV  100 , the second digital TV  110 , the personal computer system  120 , the notebook computer  130  and the mobile terminal  140  through the network  2 . The content may include applications, moving image streams, moving image files, music files and picture files. The content may be provided through a particular human channel. 
     The network interface  320  may also receive an IP packet for transmission of broadcast data from a service provider through the network  2 . The broadcast data may be real-time broadcast service data and Internet service data. 
     If the IP packet includes a stream signal, the network interface  320  may extract the stream signal from the IP packet to output the stream signal to the demultiplexer  315 . The stream signal may be transmitted from the second server  20 , the first digital TV  100 , the second digital TV  110 , the personal computer system  120 , the notebook computer  130  and the mobile terminal  140 . The stream signal may be provided through a particular human channel. 
     The network interface  320  may output the received signal and content to the controller  340 . 
     The external signal input unit  325  may provide a user interface and an interface capable of connecting an external device and the electronic device  300  to each other. The external device may be a variety of types of video or audio output devices, such as a Digital Versatile Disk (DVD) player, a Blu-ray player, a gaming device, a camcorder and a computer (e.g., a notebook computer). The electronic device  300  may display video and audio signals transmitted from the external signal input unit  325  and may store or use data signals. 
     The external device may be the image capture device  301 . The image capture device  301  may include a plurality of cameras. The image capture device  301  may capture an image of a human. In one example, the image capture device  301  may recognize, focus on, and capture a human hand shape by zooming in. Here, the captured hand shape may be recognized as a spatial gesture. More specifically, the controller  340  may recognize the captured hand shape as a spatial gesture and may execute commands for performing operations associated with the recognized spatial gesture. The spatial gesture may be defined as a gesture recognized from a video frame or an image which is mapped to one or more particular computing operations and is transmitted from the image capture device  301 . 
     In some embodiments, the electronic device  300  may include the image capture device  301 . 
     The external signal input unit  325  may be a touch pad or a touch screen. The touch screen may be integrally formed with the display  302 , or may be a separate element. If the touch screen is integrally formed with the display  302 , the display  302  may be called a touch screen display. The touch screen is arranged at the front of the display  302 , which allows the user to directly operate a Graphical User Interface (GUI) displayed on a screen. For example, the user may place his or her finger on an object to be controlled. 
     With regard to the touch pad, the touch pad is separately put on a different plane from the display  302 . For example, the display unit  302  is generally located on a vertical plane and the touch pad is generally located on a horizontal plane. Thus, the touch pad is less intuitive and therefore, is difficult to use as compared with the touch screen. 
     The touch pad and the touch screen may be a multi-point input device. 
     The controller  340  may recognize a touch gesture applied to the external signal input unit  325  and may control the electronic device  300  based on the touch gesture. The touch gesture may be defined as a stylized interaction with the external signal input unit  325 , mapped to one or more particular computing operations. The touch gesture may be implemented through hand, more particularly, finger movement. Alternatively or additionally, the touch gesture may be implemented through a stylus. A subject implementing the touch gesture, such as a finger or a stylus, is called an object. 
     The external signal input unit  325  receives the touch gesture, and the controller  340  executes commands for performing operations associated with the touch gesture. The storage unit  345  may include a gesture operating program which may be a part of an operating system or an additional application. The gesture operating program includes a series of commands for recognizing the occurrence of a gesture (e.g., a touch gesture or a spatial gesture) and informing one or more software agents of the gesture and/or which actions should be taken in response to the gesture. 
     When the user performs one or more gestures, the external signal input unit  325  transmits gesture information to the controller  340 . The controller  340  analyzes the touch gesture using commands from the storage unit  345 , more particularly, using the gesture operating program and then, controls different constituent elements of the electronic device  300 , such as the display  302 , the demultiplexer  315 , the network interface  320 , the external signal input unit  325 , the storage unit  345 , the scaler  350 , the mixer  360 , the formatter  370  and the sound sensor  390 . The gesture may be identified as commands for performing operations of applications stored in the storage unit  345 , for correcting a GUI object represented on the display  302  and data stored in the storage unit  345  and for performing operations in the multiplexer  315 , the network interface  320 , the scaler  350 , the mixer  360  and the formatter  370 . In one example, these commands may be associated with zooming-in, panning, scrolling, page-eject, rotation, scaling, video channel switch, content reception, Internet connection and the like. 
     In another example, the commands may be associated with designating a channel number, designating a human address, selecting a displayed object, dragging a displayed object, dropping a displayed object, switching a channel, displaying a channel map, switching a displayed channel map, transmitting a channel viewing request signal, booting a particular program, requesting a particular GUI, opening a file or a document, looking at a menu, selecting a menu, executing a command, log-in to an Internet site, allowing an authorized person to access a limited system region, loading a user profile associated with a user preference arrangement on the desktop, and/or the like. The displayed object may include images, channels listed in a channel map, selected regions on a GUI, menu items and displayed content. 
     A wide range of different touch gestures may be used. For example, touch gestures may include a single-point or multi-point gesture, a static or dynamic gesture, a continuous or segmented gesture, and/or the like. The single point gesture may be performed through a single contact point. For example, the single-point gesture is performed by a single touch using a single finger, palm or stylus. The multi-point gesture may be performed through a plurality of points. For example, the multi-point gesture is performed by multiple touches using plural fingers, a finger and a palm, a finger and a stylus, plural styluses and/or combinations thereof. The static gesture does not contain movement, and the dynamic gesture contains movement. The continuous gesture is performed by a single stroke and the segmented gesture is performed by a sequence of separate steps or strokes. 
     Contact between the object and the touch screen conventionally has various different patterns. For example, the single-point gesture on the touch screen includes a down event and a subsequent up event, the down event and the up event occurring at the same or almost the same position. The dynamic gesture on the touch screen includes a down event, at least one dragging event subsequent to the down event, and other following events. 
     In some embodiments, parameters are used to describe a process in which a finger accesses, comes into contact with and moves away from a touch screen display. These parameters may be a mathematical function of at least one of a distance between the finger and the touch screen display, pressure applied to the touch screen display by the finger, a contact area between the finger and the touch screen display, a voltage between the finger and the touch screen, a capacitance between the finger and the touch screen display or other physical parameters. 
     In some embodiments, according to the magnitude of each parameter (e.g., capacitance) between the finger and the touch screen display, a down event occurs when the parameter exceeds a predetermined threshold value, a dragging event occurs when a position of a cursor corresponding to the finger is moved from position A to position B while the parameter exceeds the predetermined threshold voltage, and an up event occurs when the parameter falls below the threshold level. 
     The controller  340  executes a command and performs an operation associated with the electronic device  300 . For example, the controller  340  may control data reception and processing and input and output of signals between constituent elements of the electronic device  300  using commands found in the storage unit  345 . The controller  340  may be implemented as a single chip, a plurality of chips, or a plurality of electric components. For example, a variety of architectures including a dedicated or embedded processor, a single purpose processor, a controller, an Application Specific Integrated Circuit (ASIC), etc. may be used as the controller  340 . The controller  340  may include at least one processor. 
     The controller  340  may detect a user action and may control the electronic device  300  based on the detected user action. The user action may include selecting a physical button of a display appliance or a remote controller, executing a prescribed touch gesture or selecting a soft button on a touch screen display, executing a prescribed spatial gesture recognized from an image captured through an image capture device, and producing prescribed sound by recognizing sound received by the sound sensor  390 . The controller  340  may analyze a user action as at least one executable command. The controller  340  may control constituent elements of the electronic device  300  in response to the at least one analyzed command. That is, the controller  340  may control data reception and processing and input and output of signals between constituent elements of the electronic device  300  using the at least one command. 
     The controller  340  may detect a user action for requesting a GUI for designation of a human address and may control displaying the GUI for designation of the human address in response to the detected user action. The controller  340  may detect a user action for designating a human address and may control displaying a GUI for designation of a channel number in response to the detected user action. The controller  340  may detect a user action for designating a channel number and may store the designated channel number, the designated human address and information associating the designed channel number and human address with each other to a human channel map, in response to the detected user action. The human channel map as broadly described herein may be a channel map that correlates a channel with a human address (or SNS identifier). The human channel map may also be referred to herein as a social network channel map, SNS channel map, or SNS channel listing, and may be displayed in a similar manner and format as a broadcast channel map (e.g., broadcast channel listing). 
     The controller  340  may detect a user action for designating a channel number, may read a human address associated with the designated channel number from the human channel map in response to the detected user action, and may control acquiring an address of an electronic device to access, based on the read human address. In some embodiments, the controller  340  may read the address of the electronic device based on the human address from the storage unit  345 . In some embodiments, the controller  340  may control transmitting a connection request signal including the read human address to the server  10  and may acquire the address of the electronic device to access from the server  10 . 
     The controller  340  may control transmitting a registration request signal to the server  10  upon booting or when a user action for requesting server registration is detected. The registration request signal may include an address of an electronic device, a human address, an ID and a password. 
     The controller  340  may control transmitting a connection set-up signal to another electronic device. The connection set-up signal may include a human address. When the controller  340  receives a connection set-up signal from another electronic device, the controller  340  may initialize connection with the electronic device which transmits the connection set-up signal, in response to the received connection set-up signal, and may transmit a response signal to the electronic device. During initialization, the controller  340  may open a particular port based on information included in the connection set-up signal and may transmit a response signal including a port number of the port. 
     If the controller  340  receives the response signal with respect to the connection set-up signal from the electronic device, the controller  340  may confirm whether or not the response signal includes a particular port number. If the response signal includes the particular port number, the controller  340  may receive and transmit data from and to the electronic device through a port corresponding to the particular port number. In one example, the particular port number may correspond to a port for providing a human channel. In this case, the electronic device  300  may receive content of a human channel through the port. 
     The controller  340  may control routing a packet transmitted to the network interface  320  using at least one of an IP address or a port number included in the packet. That is, the controller  340  may control outputting a packet having a particular port to the demultiplexer  315  and may control storing the packet in the storage unit  345 . 
     The controller  340  may extract data included in the packet and may perform routing of the extracted data using at least one of the IP address or the port number included in the packet. That is, the controller  340  may control outputting the packet having the particular port to the demultiplexer  315  and may control storing the packet in the storage unit  345 . The controller  340  may directly process the data included in the packet and may control displaying the processed result on a screen. 
     The controller  340  executes a computer code together with an Operating System (OS) and generates and uses data. The OS is generally known and therefore a detailed description thereof is omitted. An example of the OS may include Windows OS, Unix, Linux, Palm OS, DOS, Android, and Mac OS. The OS, other computer codes and data may be present within the storage unit  345  which is linked to and operated by the controller  340 . 
     The storage unit  345  generally stores program codes and data used by the electronic device  300 . For example, the storage unit  345  may be implemented as a Read-Only Memory (ROM), a Random Access Memory (RAM), a hard disk drive, etc. The program codes and data may be stored in a separable storage medium and, if necessary, may be loaded or installed onto the electronic device  300 . The separable storage medium may include a CD-ROM, a PC card, a memory card, a floppy disk, a magnetic tape and a network component. 
     The storage unit  345  may store a human channel map. The storage unit  345  may also catch port numbers and addresses of other electronic devices connected to the electronic device  300 . The port numbers and addresses of the electronic devices may be stored in association with human addresses. If a human channel associated with a particular human address is redisplayed, the controller  340  may read a port number and address of an electronic device associated with the particular human address from among the caught port numbers and addresses of the electronic devices and may receive content of the human channel using the read port number and address of the electronic device. 
     The scaler  350  performs scaling of signals processed in the video decoder  330  and the audio decoder  335 , so as to provide the signals with a magnitude suitable to be output through the display  302  or a speaker (not shown). 
     The scaler  350  adjusts and outputs combinations of at least two of a GUI, a video signal and an aspect ratio of a 3D image, according to the kind of content to be displayed or user set-up conditions. An aspect ratio value may be 21:9, 16:9, 4:3 or 3:2. The scaler  350  may perform scaling such that a ratio of a horizontal screen length to a vertical screen length has a particular value. 
     The mixer  360  mixes outputs of the scaler  350  and the controller  340 . 
     The formatter  370  changes the format of audio and video signals output from the mixer  360  to suit the display  302 . The formatter  370  passes input signals without implementing a format change function when a 2D image is displayed. When a 3D image is displayed, the formatter  370  may serve as a 3D formatter for processing a signal into a 3D video signal based on the format of a 3D image and the output frequency of the display  302  under control of the controller  340 . 
     The formatter  370  may output the resultant 3D video signal to form a 3D image to the display  302  and may produce a Sync signal relating to the 3D video signal to output the sync signal to the communication unit  380 . The sync signal is a signal for synchronizing display times of left eye viewpoint video data and right eye viewpoint video data and opening/closing times of a left eye lens and a right eye lens of the shutter spectacles  303 . 
     The communication unit  380  is a communication module for providing omni-directional (or non-directional) communication and performs wireless communication with other communication appliances based on predetermined communication standards. The communication standards may be Zigbee, Bluetooth, Ultra WideBand (UWB), Radio Frequency Identification (RFID) and wireless Lan. The communication appliances may be the electronic device  300 , the spectacles  303  and the remote controller  304 . 
     The communication unit  380  may include an infrared receiver capable of receiving infrared light from the remote controller  304 . 
     The sound sensor  390  may receive sound and output the received sound to the controller  340 . The controller  340  may recognize sound output from the sound sensor  390  and may control the electronic device  300  based on the recognized sound. 
       FIG. 4  is a diagram illustrating an exemplary embodiment of a screen on which a Web page of a Social Network Service (SNS) is displayed. 
     Referring to  FIG. 4 , the display  302  may display a Web page  400  of the server  200 . The network interface  320  may receive the Web page  400  from the server  200 , the controller  340  may produce video image data of the Web page  400  to enable displaying the received Web page  400 , and the scaler  350  may adjust a resolution of the produced video image data. The display  302  may display the video image data  400 , the resolution of which has been adjusted by the scaler  350 . 
     The Web page  400  may list one or more human addresses  411 ,  412  and  413 . The human address  411  represents ‘Sally Brown’, the human address  412  represents ‘Andy Fox’, and the human address  413  represents ‘Charlie Brown’. The listed human addresses  411 ,  412  and  413  are selectable by an indicator  401 . 
     In some embodiments, an indicator  401  may be provided to highlight one of the human addresses  411 ,  412  and  413 , and/or a corresponding item (e.g., news feed). Once highlighted, the address or item may be selected to perform a prescribed process, for example, for designating the corresponding human address. The selection may be made through a remote controller by pressing a particular button (for example, an ‘OK’ button) or by performing a spatial gesture corresponding to a selection. The selection may be made by other methods, such as a touch input. 
       FIG. 5  is a diagram illustrating a screen on which an exemplary embodiment of a GUI for designation of a human address is displayed. 
     Referring to  FIG. 5 , if the electronic device  300  detects a user action for designating a human address, the electronic device  300  may display a GUI  510  in response to the detected user action. The GUI  510  may be a pop-up window. 
     The GUI  510  may include a menu item  511  for channel registration, a menu item  513  for channel switch, and a menu item  515  for channel editing. The menu items  511 ,  513  and  515  are selectable by an indicator  520 . 
     If the electronic device  300  detects a user action for selecting the menu item  511 , the electronic device  300  may display a GUI for designation of a channel number in response to the detected user action. 
     If the electronic device  300  detects a user action for selecting the menu item  513 , the electronic device  300  may display a GUI for switching a channel number in response to the detected user action. 
     Also, if the electronic device  300  detects a user action for selecting the menu item  515 , the electronic device  300  may display a GUI for editing a channel number in response to the detected user action. 
       FIG. 6  is a diagram illustrating a screen on which an exemplary embodiment of a GUI for designation of a channel number is displayed. 
     Referring to  FIG. 6 , if the electronic device  300  detects a user action for designating a human address, the electronic device  300  may display a GUI  610  in response to the detected user action. Also, if the electronic device  300  detects a user action for selecting the menu item  511 , the electronic device  300  may display the GUI  610  in response to the detected user action. 
     The GUI  610  lists channel numbers from 41 to 61. The channel numbers from 41 to 61 are selectable by an indicator  620 . The GUI  610  may display the channel numbers in such a manner that a channel number to which a human address has been assigned is discriminated from an empty channel number. In the drawing, the channel numbers ‘41’, ‘43’ to ‘45’, ‘48’ to ‘55’, ‘58’, ‘59’ and ‘61’ are channel numbers to which human addresses have been assigned, and the other channel numbers ‘42’, ‘46’, ‘47’, ‘56’, ‘57’ and ‘60’ may be empty channel numbers and distinguished by a bold font. The controller  340  may confirm the channel numbers and whether or not human addresses have been assigned to the channel numbers using a human channel map stored in the storage unit  345  and may produce the GUI  610  based on the confirmed results. 
     The channel numbers listed in the GUI  610  may be channel numbers to which human addresses have been assigned, or may be channel numbers to which channels are not assigned. 
     In some embodiments, a channel number to which a channel is not assigned may be a channel number which does not belong to any one of a sky wave broadcast channel, a cable channel, an IPTV channel or a satellite channel. Thus, the electronic device  300  may simultaneously perform browsing of a human channel and one of a sky wave broadcast channel, a cable channel, an IPTV channel or a satellite channel. 
     In some embodiments, a channel number to which a channel is not assigned may be a channel number which belongs to some kinds of channels including a broadcast channel and an App channel, but does not belong to a human channel. 
       FIG. 7  is a diagram illustrating one example of a screen on which the result of assigning a human address to a channel number is displayed. 
     Referring to  FIG. 7 , if the user performs a user action for issuing a selection order to the indicator  620  in a state in which the indicator  620  is located at one of the channel numbers from 41 to 61 listed in the GUI  610 , the electronic device  300  may detect a user action for designating a channel number and may display a message  710  in response to the detected user action. The message  710  may indicate that the designated channel number is assigned to the designated human address. For example, the message  710  indicates that the channel number ‘60’ is assigned to ‘Sally Brown’. 
     The electronic device  300  may store the human address ‘Sally Brown’, the channel number ‘60’ and information associating the human address ‘Sally Brown’ and the channel number ‘60’ with each other in a human channel map, in response to the detected user action. 
       FIG. 8  is a diagram illustrating an exemplary embodiment of a screen on which a menu is displayed. 
     Referring to  FIG. 8 , the electronic device  300  may display a menu  800  including a menu item  810  for requesting displaying a GUI for designation of a human address. 
     If the user performs a user action for selecting the menu item  810 , the electronic device  300  may detect the user action for selecting the menu item  810  and may display a message  820  in response to the detected user action. 
       FIG. 9  is a diagram illustrating a screen on which another exemplary embodiment of a GUI for designation of a human address is displayed. 
     Referring to  FIG. 9 , if the user performs a user action for selecting a button  821 , the electronic device  300  may detect the user action for selecting the button  821  and may display a GUI  910  in response to the detected user action. In another embodiment, if the user performs a user action for selecting the menu item  810 , the electronic device  300  may detect the user action for selecting the menu item  810  and display the GUI  910  in response to the detected user action. 
     The user may input an IP address to the GUI  910 . After the user completes the user action for inputting the IP address, the electronic device  300  may detect the user action and may display the GUI  610  in response to the detected user action. 
     If the user performs a user action for issuing a selection order to the indicator  620  in a state in which the indicator  620  is located at one of the channel numbers from 41 to 61 listed in the GUI  610 , the electronic device  300  may detect the user action for designating a channel number and may display a message in response to the detected user action. The message may indicate that the designated channel number is assigned to the input IP address. 
     The electronic device  300  may store the input IP address, the channel number ‘60’ and information associating the input IP address and the channel number ‘60’ with each other in the human channel map, in response to the detected user action. 
     In some embodiments, the user may further input the human address ‘Sally brown’ via the GUI  910 . If the user completes the user action for inputting the human address ‘Sally Brown’ and the IP address, the electronic device  300  may detect the user action and may display the GUI  610  in response to the detected user action. If the electronic device  300  detects a user action for designating the channel number ‘60’ among the displayed channel numbers, the electronic device  300  may display a message  710  in response to the detected user action. The electronic device  300  may store the human address ‘Sally Brown’, the IP address, the channel number ‘60’, and information associating the human address ‘Sally Brown’ and the IP address with each other and information associating the channel number ‘60’ and the human address ‘Sally Brown’ with each other in the human channel map, in response to the detected user action. 
       FIG. 10  is a diagram illustrating a screen on which another exemplary embodiment of a GUI for designation of a human address is displayed. 
     Referring to  FIG. 10 , if the user performs a user action for selecting the menu item  810 , the electronic device  300  may detect the user action for selecting the menu item  810  and may display a GUI  1010  in response to the detected user action. 
     The user may input a human address to the GUI  1010 . The human address may include at least one of an e-mail address, an account name, a family name or an SIP-URL. If the user completes the user action for inputting the human address, the electronic device  300  may detect the user action and may display the GUI  610  in response to the detected user action. 
     If the user performs a user action for issuing a selection order to the indicator  620  in a state in which the indicator  620  is located at one of the channel numbers from 41 to 61 of the GUI  610 , the electronic device  300  may detect the user action for designating a channel number and may display a message in response to the detected user action. The message may indicate that the designated channel number is assigned to the input human address. The message may be the message  710  illustrated in  FIG. 7 . 
     The electronic device  300  may store the input human address, the channel number ‘60’ and information associating the input human address and the channel number ‘60’ with each other in the human channel map, in response to the detected user action. 
       FIG. 11  is a diagram illustrating a screen on which a further exemplary embodiment of a GUI for designation of a human address is displayed. 
     Referring to  FIG. 11 , if the user performs a user action for selecting the menu item  810 , the electronic device  300  may detect the user action for selecting the menu item  810  and may display a GUI  1110  in response to the detected user action. 
     The user may input a human address to the GUI  1110 . The GUI  1110  may be a pull-down menu, or the like, that lists one or more selectable human addresses. The human address may include at least one of an e-mail address, an account name or an SIP-URL. If the user completes the user action for inputting the human address, the electronic device  300  may detect the user action and may display the GUI  610  in response to the detected user action. 
     In some embodiments, the user may perform a user action for selecting one human address from among the human addresses listed in the GUI  1110 . If the user completes the user action for inputting the human address, the electronic device  300  may detect the user action and may display the GUI  610  in response to the detected user action. 
     If the user performs a user action for issuing a selection order to the indicator  620  in a state in which the indicator  620  is located at one of the channel numbers from 41 to 61 listed in the GUI  610 , the electronic device  300  may detect the user action for designating a channel number and may display a message in response to the detected user action. The message may indicate that the designated channel number is assigned to the input human address. The message may be the message  710  illustrated in  FIG. 7 . 
     The electronic device  300  may store the input human address, the channel number ‘60’ and information associating the input human address and the channel number ‘60’ with each other in the human channel map, in response to the detected user action. 
       FIG. 12  is a diagram illustrating an exemplary embodiment for a human channel map. 
     Referring to  FIG. 12 , a human channel map  1210  may include channel numbers, human addresses and pointers. In the human channel map, a channel number, a human address to which the channel number is assigned, and a pointer associated with the human address may be arranged in a single line. That is, information representing a line may be information associating a channel number and a human address with each other. In one example, since a channel number ‘71’ and a human address ‘Zoe’ are located in the second line, the electronic device  300  may confirm that the channel number ‘71’ is assigned to the human address ‘Zoe’. 
     Access information maps  1230 ,  1240 ,  1250 ,  1260  and  1270  store information required to access the human channels. The access information maps  1230 ,  1240 ,  1250 ,  1260  and  1270  may respectively store different kinds of information according to access methods thereof. The first access information map  1230  may store type information indicating an access method, IP addresses, port numbers and authentication information. The second access information map  1240  may store type information indicating an access method, SIP-URLs and authentication information. The third access information map  1250  may store type information indicating an access method, IP addresses, port numbers, accounts and authentication information. The fourth access information map  1260  may store type information indicating an access method, IP addresses, port numbers, e-mail addresses and authentication information. The fifth access information map  1270  may store type information indicating an access method, shortcuts and authentication information. The information stored in the access information maps  1230 ,  1240 ,  1250 ,  1260  and  1270  may be input by the user, or may be transmitted from the server  10  and the server  20 . In addition, the information may be stored in the access information maps before and after the information associating the channel number and the human address with each other is stored in the human channel map  1210 . 
     An access method may be one of a first access method using IP addresses and port numbers, a second access method using SIP-URLs, a third access method for accessing a server and receiving a service associated with a particular account, a fourth access method for accessing an SNS server and receiving a service associated with a particular e-mail address and a fifth access method using shortcuts. The first access method, the second access method, the third access method, the fourth access method and the fifth access method may respectively be denoted by type  1 , type  2 , type  3 , type  4  and type  5 . 
     The pointers may indicate positions where information associated with the human addresses is stored. A pointer  1221  indicates a position where information associated with ‘Me’ is stored. That is, the pointer  1221  indicates the first line of the first access information map  1230 . An IP address associated with ‘Me’ is 127.0.0.1, and a port number associated with ‘Me’ is 88. Access to a human channel of ‘Me’ may be implemented by the access method denoted by type  1 . A pointer  1222  indicates a position where information associated with ‘Zoe’ is stored. That is, the pointer  1222  indicates the second line of the first access information map  1230 . An IP address associated with ‘Zoe’ is 210.1.7.29, and a port number associated with ‘Zoe’ is 545. Access to a human channel of ‘Zoe’ may be implemented by the access method denoted by type  1 . Also, a pointer  1223  indicates a position where information associated with ‘Susan’ is stored. That is, the pointer  1223  indicates the third line of the first access information map  1230 . An IP address associated with ‘Susan’ is 198.10.8.102, and a port number associated with ‘Susan’ is 546. Access to a human channel of ‘Susan’ may be implemented by the access method denoted by type  1 . 
     A pointer  1225  indicates a position where information associated with ‘Chuck’ is stored. That is, the pointer  1225  indicates the first line of the second access information map  1240 . An SIP-URL associated with ‘Chuck’ is chuck@TV.com. Access to a human channel representing ‘Chuck’ may be implemented by the access method denoted by type  2 . A pointer  1226  indicates a position where information associated with ‘Dad’ is stored. That is, the pointer  1226  indicates the second line of the second access information map  1240 . An SIP-URL associated with ‘Dad’ is Dad@TV.com. Access to a human channel of ‘Dad’ may be implemented by the access method denoted by type  2 . 
     A pointer  1224  indicates a position where information associated with ‘Sophie’ is stored. That is, the pointer  1224  indicates the first line of the third access information map  1250 . An IP address associated with ‘Sophie’ is 202.131.29.70, a port number associated with ‘Sophie’ is 80, and an account name is Sophie. Access to a human channel of ‘Sophie’ may be implemented by the access method denoted by type  3 . A pointer  1227  indicates a position where information associated with ‘George’ is stored. That is, the pointer  1227  indicates the second line of the third access information map  1250 . An IP address associated with ‘George’ is 209.62.105.13, and a port number associated with ‘George’ is 80. Access to a human channel of ‘George’ may be implemented by the access method denoted by type  3 . 
     A pointer  1228  indicates a position where information associated with ‘Carrie’ is stored. That is, the pointer  1228  indicates the first line of the fourth access information map  1260 . An IP address associated with ‘Carrie’ is 69.171.224.12, a port number associated with ‘Carrie’ is 80, and an e-mail address associated with ‘Carrie’ is Carrie@SNS.com. 
     A pointer  1229  indicates a position where information associated with ‘Paul’ is stored. That is, the pointer  1229  indicates the first line of the fifth access information map  1270 . A shortcut associated with ‘Paul’ is ftp://Paul.sns.com:21. 
     The authentication information of the access information maps  1230 ,  1240 ,  1250 ,  1260  and  1270  may include IDs and passwords as well as stored character strings. In addition, the authentication information may be encoded and stored. 
       FIG. 13  is a flowchart illustrating an implementation procedure of one exemplary embodiment for a method of constructing a human channel map in accordance with the present disclosure. 
     Referring to  FIG. 13 , the display  302  displays a first GUI for designation of a human address (S 100 ). The displayed first GUI may list at least one selectable human address. The listed human address may be transmitted from one of the first server  10  and the second server  20 . The network interface  320  may receive the human address from one of the first server  10  and the second server  20 . The controller  340  may control displaying the first GUI which provides the human address. The first GUI may be one of the Web page  400  in  FIG. 4 , the GUI  910  in  FIG. 9 , the GUI  1010  in  FIG. 10  and the GUI  1110  in  FIG. 11 . 
     The controller  340  detects a first user action for designating a human address (S 110 ). 
     The display  302  displays a second GUI for designation of a channel number in response to the detected first user action (S 120 ). The displayed second GUI may list a plurality of selectable channel numbers. The second GUI may include an indicia that indicates the channel numbers which are currently available. The second GUI may be the GUI  610  in  FIG. 6 . 
     The controller  340  detects a second user action for designating a channel number (S 130 ). 
     The controller  340  stores a human address, a channel number and information associating the human address and the channel number with each other in a human channel map in response to the detected second user action (S 140 ). The human channel map may be the human channel map  1210  in  FIG. 12 , or may include the human channel map  1210 , the first access information map  1230 , the second access information map  1240 , the third access information map  1250 , the fourth access information map  1260  and the fifth access information map  1270  as illustrated in  FIG. 12 . 
       FIG. 14  is a flowchart illustrating an implementation procedure of another exemplary embodiment for a method of constructing a human channel map in accordance with the present disclosure. 
     Referring to  FIG. 14 , the display  302  displays a first GUI for designation of a channel number (S 200 ). The displayed first GUI may list a plurality of selectable channel numbers. The channel numbers may include an indicia identifying channel numbers which are available such as highlighting, bold text, or the like. The first GUI may be the GUI  610  in  FIG. 6 . 
     The controller  340  detects a first user action for designating a channel number (S 210 ). 
     The display  302  displays a second GUI for designating a human address in response to the detected first user action (S 220 ). The displayed second GUI may list at least one selectable human address. The listed human address may be transmitted from one of the first server  10  and the second server  20 . The network interface  320  may receive the human address transmitted from one of the first server  10  and the second server  20 , and the controller  340  may control displaying the second GUI which provides the received human address. The second GUI may be one of the Web page  400  in  FIG. 4 , the GUI  910  in  FIG. 9 , the GUI  1010  in  FIG. 10  and the GUI  1110  in  FIG. 11 . 
     The controller  340  detects a second user action for designating a human address (S 230 ). 
     The controller  340  stores a human address, a channel number and information associating the human address and the channel number with each other in a human channel map in response to the detected second user action (S 240 ). The human channel map may be the human channel map  1210  in  FIG. 12 , or may include the human channel map  1210 , the first access information map  1230 , the second access information map  1240 , the third access information map  1250 , the fourth access information map  1260  and the fifth access information map  1270  as illustrated in  FIG. 12 . 
       FIG. 15  is a diagram illustrating one exemplary embodiment of a screen on which a human channel map and content of a selected human channel are displayed. 
     Referring to  FIG. 15 , the controller  340  may control displaying a screen  1500 . The screen  1500  may include a channel map region  1510 , a channel display region  1520 , a content list region  1530  and a human display region  1540 . 
     The channel map region  1510  provides a human address and a channel number mapped to the human address. In one example, the channel map region  1510  provides a human address ‘Me’, denoted by reference numeral  1511 , and a channel number ‘00’, denoted by reference numeral  1512 , mapped to the human address ‘Me’. The controller  340  may produce an image displayed on the channel map region  1510  using information of the human channel map. The human address and channel number of the channel map region  1510  may be selected using a cursor  1501  and an indicator  1502 . For example, when the cursor  1501  is positioned over a particular human address (e.g., human address ‘Sophie’, denoted by reference numeral  1513 , and channel number ‘72’ denoted by reference numeral  1514 ), the indicator  1502  may be located over a designated human address and channel number, as illustrated in FIG.  15 . The cursor  1501  may be a pointer, arrow, or the like, and the indicator  1502  may be a highlight, bold text, or the like. 
     The channel display region  1520  may display a human channel corresponding to a designated channel number. In  FIG. 15 , since the indicator  1502  and cursor  1501  are positioned over the channel number ‘72’, a designated channel number is 72 and thus, the channel display region  1520  displays a human channel corresponding to the channel number ‘72’. The human channel corresponding to the channel number ‘72’ is a human channel of the human address mapped to the channel number ‘72’. That is, the channel display region  1520  displays the human channel of ‘Sophie’. 
     The content list region  1530  provides a content list provided by a human channel corresponding to a designated channel number. The content list region  1530  may provide a thumbnail of content. If a user action for selecting particular content from among content provided in the content list region  1530  is detected, the controller  340  may control displaying the selected content on the channel display region  1520  in response to the detected user action. In addition, it is possible to discriminate between content displayed on the channel display region  1520  and content displayed on the content list region  1530 . To this end, for example, the content displayed on the channel display region  1520  may be highlighted in the content list region  1530 . 
     The human display region  1540  displays a human having a human address associated with a selected channel number. The human display region  1540  may display a picture of an owner of a human channel indicated by the indicator  1501 . 
       FIG. 16  is a diagram illustrating another exemplary embodiment of a screen on which a human channel map and content of a selected human channel are displayed. 
     Referring to  FIG. 16 , the controller  340  may detect a user action for requesting channel switch to Channel 73. The user action for requesting channel switch may include executing a spatial gesture for requesting channel increment, or pressing a button of a remote controller for requesting channel increment. 
     The controller  340  may control displaying a screen  1600  in response to the detected user action. In a channel map region  1610 , an indicator  1601  is located at the channel number ‘73’ designated by the user action. A channel display region  1620  displays a human channel corresponding to the channel number ‘73’, i.e. the human channel of ‘Chuck’. A content list region  1630  displays a content list provided by the human channel mapped to the channel number ‘73’. 
       FIG. 17  is a diagram illustrating a further exemplary embodiment of a screen on which a human channel map and content of a selected human channel are displayed. 
     Referring to  FIG. 17 , the controller  340  may detect a user action for requesting channel switch to Channel 75. The controller  340  may control displaying a screen  1700  in response to the detected user action. In a channel map region  1710 , an indicator  1701  is located at the channel number ‘75’ designated by the user action. A channel display region  1720  displays a human channel corresponding to the channel number ‘75’, i.e. the human channel of ‘Susan’. A content list region  1730  displays a content list provided by the human channel mapped to the channel number ‘75’. 
       FIG. 18  is a diagram illustrating an implementation procedure of an exemplary embodiment for a method of providing a human channel service in accordance with the present disclosure. 
     Referring to  FIG. 18 , the controller  340  detects a user action for designating a channel number (S 300 ). Step S 300  may be performed while the display  302  is displaying at least one of a human channel, a broadcast channel or an App channel. For example, the controller  340  may detect the user action for designating a channel number while the display  302  is displaying the screen  1500  of  FIG. 15 , the screen  1600  of  FIG. 16  or the screen  1700  of  FIG. 17 . The broadcast channel may include at least one of a sky wave broadcast channel, a cable channel, a satellite channel or an IPTV channel. 
     The controller  340  receives content of a human channel indicated by the designated channel number in response to the detected user action (S 310 ). The content may be first content of a content list provided by the human channel or initial content introducing the human channel. 
     The controller  340  controls displaying the received content (S 320 ). The display  302  may display the screen  1500  of  FIG. 15 , the screen  1600  of  FIG. 16  or the screen  1700  of  FIG. 17 . 
       FIG. 19  is a diagram illustrating an implementation procedure of one exemplary embodiment for a method of receiving content of a human channel. 
     Referring to  FIG. 19 , the controller  340  reads a human address associated with a designated channel number from a human channel map (S 400 ). The human channel map may be the human channel map  1210  of  FIG. 12  or may include the human channel map  1210 , the first access information map  1230 , the second access information map  1240 , the third access information map  1250 , the fourth access information map  1260  and the fifth access information map  1270  as illustrated in  FIG. 12 . 
     The controller  340  reads an address of an electronic device to access, based on the read human address (S 410 ). The electronic device to access may be one of the first digital TV  100 , the second digital TV  110 , the personal computer system  120 , the notebook computer  130 , the mobile terminal  140 , or another appropriate type of multi-functional display device. The address of the electronic device to access may be stored in the access information map  1230  illustrated in  FIG. 12 . The address of the electronic device to access may include an IP address and a port number. 
     The network interface  320  receives content from the electronic device using the read address of the electronic device (S 420 ). The electronic device  300  may set up communication with the electronic device using the address of the electronic device read in Step S 410  and may receive content of a human channel from the electronic device. The content may be transmitted based on a protocol such as SMTP, HTTP, FTP, RTSP or MMS. 
     The method of receiving content of a human channel illustrated in  FIG. 19  may be one example of the first access method as described with reference to  FIG. 12 . 
       FIG. 20  is a diagram illustrating an implementation procedure of another exemplary embodiment for a method of receiving content of a human channel. 
     Referring to  FIG. 20 , the controller  340  reads a human address associated with a designated channel number from a human channel map (S 500 ). The human channel map may be the human channel map  1210  of  FIG. 12 , or may include the human channel map  1210 , the first access information map  1230 , the second access information map  1240 , the third access information map  1250 , the fourth access information map  1260  and the fifth access information map  1270  as illustrated in  FIG. 12 . 
     The controller  340  reads an address of a server to be connected, based on the read human address (S 510 ). The server may be the server  10  or the server  20 . The address of the server may be stored in the access information map  1250 , the access information map  1260  and the access information map  1270 . The address of the server may include an IP address, a port number and an account name, or may include an IP address, a port number and an e-mail address, or may include a shortcut. 
     The network interface  320  receives content from the server using the read address of the server (S 520 ). The electronic device  300  may access the server using the address of the server read in Step S 510  and may receive content of a human channel from the server. The content may be transmitted based on a protocol such as SMTP, HTTP, FTP, RTSP or MMS. 
     The method of receiving content of a human channel illustrated in  FIG. 19  may be one example of one of the third access method, the fourth access method and the fifth access method as described with reference to  FIG. 12 , according to the address of the server read in Step S 510 . 
       FIG. 21  is a diagram illustrating an implementation procedure of a further exemplary embodiment for a method of receiving content of a human channel. 
     Referring to  FIG. 21 , the controller  340  reads a human address associated with a designated channel number from a human channel map (S 600 ). The human channel map may be the human channel map  1210  of  FIG. 12 , or may include the human channel map  1210 , the first access information map  1230 , the second access information map  1240 , the third access information map  1250 , the fourth access information map  1260  and the fifth access information map  1270  as illustrated in  FIG. 12 . Also, the read human address may include an SIP-URL. 
     The network interface  320  transmits a connection request signal including the read human address to a server (S 610 ). The connection request signal may include an SIP-URL. Also, the server may be the server  10 . 
     The network interface  320  receives a signal including an address of an electronic device from the server (S 620 ). The signal may be a response signal with respect to the connection request signal. The address of the electronic device  300  may include an IP address and a port number. The electronic device  300  may be one of the first digital TV  100 , the second digital TV  110 , the personal computer system  120 , the notebook computer  130  and the mobile terminal  140 . 
     The controller  340  controls receiving content using the received address of an electronic device (S 630 ). The electronic device  300  may set up communication with the electronic device using the received address of the electronic device read in operation  620  and may receive content of a human channel from the electronic device. The content may be transmitted based on a protocol such as SMTP, HTTP, FTP, RTSP or MMS. 
       FIG. 22  is a diagram illustrating a method of setting up connection between two electronic devices. 
     Referring to  FIG. 22 , an electronic device  2210  may set up (or configure) a first connection  2211  with a server  2230 . During set up of the first connection  2211 , the server  2230  acquires and stores an IP address and port number of the electronic device  2210 . The first connection  2211  may be set up during booting of the electronic device  2210 , or may be set up when a user requests connection between the electronic device  2210  and the server  2230 . The electronic device  2210  may be one of the first digital TV  100 , the second digital TV  110 , the personal computer system  120 , the notebook computer  130  or the mobile terminal  140 , and the server  2230  may be the server  10 , for example. 
     An electronic device  2220  may set up a second connection  2231  with the server  2230 . During set up of the second connection  2231 , the server  2230  acquires and stores an IP address and a port number of the electronic device  2220 . The second connection  2231  may be set up during booting of the electronic device  2220 , or may be set up when a user requests connection between the electronic device  2220  and the server  2230 . 
     The second connection  2231  may be set up after the server  2230  completes set up of the first connection  2211  with the electronic device  2210 . When requesting the second connection  2231 , the server  2230  may use the previously stored IP address and port number of the electronic device  2220 . The electronic device  2220  may be one of the first digital TV  100 , the second digital TV  110 , the personal computer system  120 , the notebook computer  130  or the mobile terminal  140 . 
     The electronic device  2210  may set up a third connection  2221  with the electronic device  2220 . In this case, the electronic device  2210  may receive the IP address and port number of the electronic device  2220  from the server  2230  which has previously acquired the IP address and port number through the second connection  2231 , and may transmit a signal to the electronic device  2220  using the received IP address and port number. The transmitted signal may be a connection set-up signal or a human channel request signal. 
     The electronic device  2220  may receive the IP address and port number of the electronic device  2210  from the server  2230  which has previously acquired the IP address and port number through the first connection  2211 , and may transmit a response signal to the electronic device  2210  using the received IP address and port number. In some embodiments, the electronic device  2220  may extract the IP address and port number of the electronic device  2210  from the connection set-up signal transmitted from the electronic device  2210  and may transmit a response signal to the electronic device  2210  using the extracted IP address and port number. 
       FIG. 23  is a schematic diagram illustrating a configuration of another exemplary embodiment of a broadcast system in accordance with the present disclosure, and  FIG. 24  is a diagram illustrating an exemplary embodiment of a Network Address Translation (NAT) table, and  FIG. 25  is a diagram illustrating an exemplary embodiment of an address matching table recorded in a server. 
     Referring to  FIGS. 23 to 25 , the broadcast system  2300  may include a first electronic device  2310 , a second electronic device  2320 , a network device  2330 , a network device  2340  and a server  2350 . 
     The first electronic device  2310  and the second electronic device  2320  respectively have private IP addresses. Specifically, the private IP address of the electronic device  2310  is private_ip 1  and the private IP address of the electronic device  2320  is private_ip 2 . The electronic device  2310  and the electronic device  2320  may be one of the first digital TV  100 , the second digital TV  110 , the personal computer system  120 , the notebook computer  130  or the mobile terminal  140 . 
     The network device  2330 , as set up in the NAT table, translates the private IP address of the first electronic device  2310  into a public IP address, i.e. from private_ip 1  to public_ip 1 . More specifically, the network device  2330  translates a source IP address of a packet, transmitted from the first electronic device  2310  to the server  2350 , from pivate_ip 1  into public_ip 1 . The network device  2330  may be one of a router, a sharer or a gateway. 
     The network device  2340 , as set up in the NAT table, translates the private IP address of the second electronic device  2320  into a public IP address, i.e. from private_ip 2  to public_ip 2 . More specifically, the network device  2340  translates a source IP address of a packet, transmitted from the second electronic device  2320  to the server  2350 , from pivate_ip 2  into public_ip 2 . The network device  2340  may be one of a router, a sharer or a gateway. 
     The server  2350  may be the server  10  illustrated in  FIG. 1 . The server  2350  may store an address matching table  2500 . The address matching table  2500  may be permanently or temporarily stored in the storage unit. The address matching table  2500  may store a human address, an IP address and information associating the human address and the IP address with each other. The information associating the human address and the IP address with each other may be information representing a line of the table. 
     In the address matching table  2500 , a human address  1  is associated with public_ip 1  and a human address  2  is associated with public_ip  2 . The human address  1  is user 1 @TV.com, which is a human address transmitted by the first electronic device  2310 , and the human address  2  is user 2 @TV.com, which is a human address transmitted by the second electronic device  2320 . 
     If the server  2350  receives a connection request signal including the human address  2  ‘user 2 @TV.com’ from the first electronic device  2310 , the server  2350  reads the IP address ‘public_ip 2 ’ matching to the human address  2  from the address matching table  2500  and transmits a response signal including the read IP address ‘public_ip 2 ’ to the first electronic device  2310 . Also, the server  2350  reads the IP address ‘public_ip 1 ’ of the first electronic device  2310  from the address matching table  2500  and transmits a signal including the read IP address ‘public_ip 1 ’ to the second electronic device  2320 . In conclusion, the first electronic device  2310  may implement data reception/transmission with the second electronic device  2320  having the private IP address using the received IP address ‘public_ip 2 ’. 
       FIG. 26  is a diagram illustrating an implementation procedure of an exemplary embodiment for a method of setting up connection between two electronic devices. 
     Referring to  FIG. 26 , the first electronic device  2610  transmits a registration request signal to a server  2630  (S 700 ). The server  2630  may receive the registration request signal. The first electronic device  2610  may be one of the first digital TV  100 , the second digital TV  110 , the personal computer system  120 , the notebook computer  130  or the mobile terminal  140 . The registration request signal may include a human address ‘user 1 @TV.com’ and information required to log-in to the server  2630 . The log-in information may be authentication information stored in a human channel map. 
     The server  2630  transmits a response signal with respect to the registration request signal to the first electronic device  2610  (S 705 ). The server  2630  may store the human address ‘user 1 @TV.com’ included in the registration request signal and the address of the first electronic device  2610  in an address matching table. Also, the server  2630  may implement a log-in procedure using information included in the registration request signal. The address matching table may be the address matching table  2500  illustrated in  FIG. 26 . The server  2630  may be the server  10  illustrated in  FIG. 1 . 
     The second electronic device  2620  transmits a registration request signal to the server  2630  (S 710 ). The server  2630  may receive the registration request signal. The second electronic device  2620  may be one of the first digital TV  100 , the second digital TV  110 , the personal computer system  120 , the notebook computer  130  or the mobile terminal  140 . The registration request signal may include the human address ‘user 2 @TV.com’ and information required to log-in to the server  2630 . 
     The server  2630  transmits a response signal with respect to the received registration request signal to the second electronic device  2620  (S 715 ). The server  2630  may store the human address ‘user 2 @TV.com’ included in the registration request signal and the address of the second electronic device  2620  in the address matching table. Also, the server  2630  may implement a log-in procedure using information included in the registration request signal. 
     The first electronic device  2610  transmits a connection request signal including the human address ‘user 2 @TV.com’ to the server  2630  (S 720 ). The server  2630  receives the connection request signal. 
     The server  2630  transmits a connection response signal including ‘public_ip 2 ’ to the first electronic device  2610  in response to the received connection request signal (S 725 ). ‘Public_ip 2 ’ is the public IP address of the second electronic device  2620 . The first electronic device  2610  receives the connection response signal and acquires the address of the second electronic device  2620  using the connection response signal. 
     The server  2630  transmits a connection response signal including ‘public_ip 1 ’ to the second electronic device  2620  (S 730 ). ‘Public_ip 1 ’ is the public IP address of the first electronic device  2610 . The second electronic device  2620  receives the connection response signal and acquires the address of the first electronic device  2610  using the connection response signal. 
     The first electronic device  2610  transmits a connection set-up signal to the second electronic device  2620  using the IP address ‘public-ip 2 ’ (S 735 ). The second electronic device  2620  receives the connection set-up signal. 
     The second electronic device  2620  transmits a connection response signal with respect to the connection set-up signal to the first electronic device  2610  using the IP address ‘public_ip 1 ’ (S 740 ). The first electronic device  2610  receives the connection response signal. With Step S 735  and Step S 740 , communication between the first electronic device  2610  and the second electronic device  2620  is initialized. The connection response signal may include a particular port number, and the second electronic device  2620  may open a port corresponding to the particular port number. 
     The first electronic device  2610  transmits a human channel request signal to the second electronic device  2620  in response to the received connection response signal (S 745 ). The second electronic device  2620  receives the human channel request signal. The human channel request signal may be transmitted to a port corresponding to the port number included in the connection response signal. 
     The second electronic device  2620  transmits a response signal with respect to the received human channel request signal to the first electronic device  2610  (S 750 ). The response signal may include content of a human channel or a content list of a human channel. The first electronic device  2610  receives the response signal. The first electronic device  2610  may display content when the content is transmitted as the response signal, or may display a content list when the content list is transmitted as the response signal. 
       FIG. 27  is a diagram illustrating a screen on which one exemplary embodiment of a GUI for setting up a human channel is displayed. 
     Referring to  FIG. 27 , the display  302  may display a GUI  2700 . If the controller  340  detects a user action for setting up a human channel in a state in which the Web page  400  is displayed, the controller  340  may control displaying the GUI  2700  in response to the detected user action. In some embodiments, the controller  340  may control displaying the GUI  2700  after the Web page  400  is received. 
     The GUI  2700  includes a channel number region  2710  including at least one channel number and a human channel region  2720  including at least one human address. In one example, the Web page  400  illustrated in  FIG. 4  may be displayed on the human channel region  2720 , and the GUI  610  illustrated in  FIG. 6  may be displayed on the channel number region  2710 . 
     The user may drag each human address  411 ,  412  or  413  to the channel number region  2710  on the GUI  2700  and drop the dragged human address onto one of the channel numbers listed on the channel number region  2710 . The human address  411 ,  412 , and  413  may be represented by an icon, or another appropriate type of selectable object. The icon may have an image associated with the individual. Then, the controller  340  may store the channel number onto which the human address was dropped, the dropped human address and information associating the channel number and human address with each other in a human channel map. The human channel map may be the human channel map  1210  in  FIG. 12 , or may include the human channel map  1210 , the first access information map  1230 , the second access information map  1240 , the third access information map  1250 , the fourth access information map  1260  and the fifth access information map  1270  as illustrated in  FIG. 12 . 
       FIG. 28  is a diagram illustrating a screen in a state in which a human address is being dragged on the displayed GUI of  FIG. 27 . 
     Referring to  FIG. 28 , an image  2810  represents a state in which the human address  411  is being dragged. If the image  2810  drops onto a channel number ‘60’, the human address  411 , the channel number ‘60’ and information associating the human address  411  and the channel number ‘60’ with each other may be stored in the human channel map. 
       FIG. 29  is a diagram illustrating a screen on which another exemplary embodiment of a GUI for setting up a human channel is displayed. 
     Referring to  FIG. 29 , the display  302  may display a GUI  2900 . If the controller  340  detects a user action for setting up a human channel, the controller  340  may control display of the GUI  2900  in response to the detected user action. The user action is, for example, a user action for selecting the menu item  810  illustrated in  FIG. 8 , or a user action for selecting a separate channel set-up menu item. 
     The GUI  2900  includes a channel number region  2910  including at least one channel number and a human channel region  2920  including at least one human address. The GUI  1110  illustrated in  FIG. 11  may be displayed on the human channel region  2920  and the GUI  610  illustrated in  FIG. 6  may be displayed on the channel number region  2910 . 
     The user may drag each human address ‘user 99 @TV.com’, ‘user 91 @TV.com’, ‘user 23 @TV.com’, etc., to the channel number region  2910  on the GUI  2900  and drop the dragged human address onto one of the channel numbers listed on the channel number region  2910 . Then, the controller  340  may store the channel number to which the human address was dropped, the dropped human address and information associating the channel number and the human address with each other in a human channel map. The human channel map may be the human channel map  1210  in  FIG. 12 , or may include the human channel map  1210 , the first access information map  1230 , the second access information map  1240 , the third access information map  1250 , the fourth access information map  1260  and the fifth access information map  1270  as illustrated in  FIG. 12 . 
       FIG. 30  is a diagram illustrating a screen in a state in which a human address is being dragged on the displayed GUI of  FIG. 29 . 
     Referring to  FIG. 30 , an image  3010  represents a state in which the human address ‘user 91 @TV.com’ is being dragged. If the image  3010  is dragged onto the channel number ‘60’, the human address ‘user 91 @TV.com’, the channel number ‘60’ and information associating the human address ‘user 91 @TV.com’ and the channel number ‘60’ with each other may be stored in the human channel map. 
       FIG. 31  is a diagram illustrating a screen on which an exemplary embodiment of a GUI for setting up a channel is displayed. 
     Referring to  FIG. 31 , the display  302  may display a GUI  3100 . If the controller  340  detects a user action for setting up a channel, the controller  340  may control displaying the GUI  3100  in response to the detected user action. The user action is, for example, the user action for selecting the menu item  810  illustrated in  FIG. 8 , the user action for selecting the menu item  513  or the menu item  515  illustrated in  FIG. 5 , a user action for selecting a channel set-up menu item, or the like, which may be configured to display the GUI  3100 . 
     The GUI  3100  includes a broadcast channel region  3110  including at least one broadcast channel, a human channel region  3120  including at least one human address and an App channel region  3130  including at least one App channel. The broadcast channel refers to a channel for providing real-time broadcasting received through a satellite, a terrestrial broadcast system or an IP network. The App channel may refer to a content provider or a service provider connectable through an IP network, or may refer to a channel for providing data reception/transmission with the content provider or the service provider. Also, the App channel may refer to a channel capable of receiving an Internet service provided by the content provider or the service provider. The Internet service refers to a Content on Demand (CoD) service, a YouTube service, an information service for providing weather, news and local information and enabling information retrieval and the like, an entertainment service related to gaming, singing and the like, a communication service related to TV mail and TV SMS services and the like, and other Internet services including an application providing service and the like. 
     The broadcast channel region  3110  lists broadcast channels, such as ‘NBC’, ‘FOX’, ‘CNN’, ‘SBS’, ‘KBS’ and ‘OCN’. The human channel region  3120  lists human addresses, such as ‘Marek Foss’, ‘Ellisabeth Daveine’ and ‘Anne’. The App channel region  3130  lists App channels, such as ‘Farmville’, ‘Chess’, ‘Angry birds’ and ‘Unblock Me’. 
     The GUI  3100  further includes a channel number region  3140 , a next channel call button  3150  and a cancel button  3160 . The channel number region  3140  serves to indicate a particular channel number, and the next channel call button  3150  serves to switch the channel number indicated on the channel number region  3140  to another channel number. The cancel button  3160  serves to cancel a user action implemented on the GUI  3100 . 
     The user may drag each human address ‘Marek Foss’, ‘Ellisabeth Daveine’ or ‘Anne’ to the channel number region  3140  on the GUI  3100  and may drop the dragged human address onto the channel number region  3140 . Then, the controller  340  may store the channel number indicated on the channel number region  3140 , the dropped human address and information associating the channel number and the human address with each other in a human channel map. The human channel map may be the human channel map  1210  in  FIG. 12 , or may include the human channel map  1210 , the first access information map  1230 , the second access information map  1240 , the third access information map  1250 , the fourth access information map  1260  and the fifth access information map  1270  as illustrated in  FIG. 12 . 
     Also, the user may drag each broadcast channel ‘NBC’, ‘FOX’, ‘CNN’, ‘SBS’, ‘KBS’ or ‘OCN’ to the channel number region  3140  on the GUI  3100  and may drop the dragged broadcast channel onto the channel number region  3140 . Then, the controller  340  may store the channel number indicated on the channel number region  3140 , the dropped broadcast channel and information associating the channel number and the broadcast channel with each other in a broadcast channel map. The broadcast channel map refers to a channel map in which the broadcast channel and the channel number are stored in association with each other. 
     The user may also drag each App channel ‘Farmville’, ‘Chess’, ‘Angry bird’ or ‘Unblock Me’ to the channel number region  3140  on the GUI  3100  and may drop the dragged App channel onto the channel number region  3140 . Then, the controller  340  may store the channel number indicated on the channel number region  3140 , the dropped App channel and information associating the channel number and the App channel with each other in an App channel map. The App channel map refers to a channel map in which the App channel and the channel number are stored in association with each other. 
       FIG. 32  is a diagram illustrating a screen in a state in which a human address is being dragged on the displayed GUI of  FIG. 31 . 
     Referring to  FIG. 32 , a screen  3200  displays an image  3125  on the GUI  3100 . The image  3125  represents a state in which the human address ‘Marek Foss’ is being dragged. If the image  3125  drops onto the channel number region  3140 , the human address ‘Marek Foss’, the channel number ‘100’ and information associating the human address ‘Marek Foss’ and the channel number ‘100’ with each other may be stored in the human channel map. 
       FIG. 33  is a diagram illustrating a screen in a state in which a broadcast channel, a human address and an App channel are dropped onto the channel number region of the displayed GUI of  FIG. 31 . 
     Referring to  FIG. 33 , a screen  3300  displays images  3115 ,  3125  and  3135  dropped onto the channel number region  3140 . The image  3115  and the image  3135  respectively represent a state in which the broadcast channel ‘NBC’ and the App channel ‘Chess’ were dropped. In this case, the broadcast channel, the human address and the App channel may be mapped to the same channel number. In other words, the same channel number may be assigned to a broadcast channel, a human channel and an App channel. 
     It should be appreciated that a particular channel number may be assigned multiple SNS accounts associated with a particular individual or multiple individuals. For example, an individual may have multiple SNS accounts, such as a facebook account and a twitter account, each represented by an image or icon in the human channel region  3120 . In this case, the images or icons corresponding to each of the SNS accounts may be dragged into the channel number region  3140  and associated with the corresponding channel number (e.g., channel 100). Alternatively, the multiple SNS accounts for a particular individual may be assigned to different channels. In another embodiment, icons for multiple SNS accounts of different users (e.g., SNS accounts corresponding to Marek Foss and Anne) may be dropped in the channel number region  3140  and associated with a particular channel number (e.g., channel 100). In this case, the group of SNS addresses may be given a human address (or SNS identifier) that represents the group, for example, “family.” The human address for the group may be associated with a particular channel number. 
       FIG. 34A  and  FIG. 34B  are flowcharts illustrating an implementation procedure of a further exemplary embodiment for a method of constructing a channel map in accordance with the present disclosure. 
     Referring to  FIG. 34A  and  FIG. 34B , the display  302  displays a GUI for setting up a channel (S 800 ). The displayed GUI may be one of the GUI  2700  illustrated in  FIG. 27 , the GUI  2900  illustrated in  FIG. 29  or the GUI  3100  illustrated in  FIG. 31 . 
     The controller  340  detects a first user action for selecting a human address (S 801 ). The first user action may be a user action for generating a down event (e.g., a selection) in a region at which the human address is located. 
     The controller  340  detects a second user action for requesting dragging (S 802 ). The second user action may occur consecutively after the first user action. The second user action may be a user action for successively generating a dragging event. The controller  340  controls dragging the human address selected by the first user action. 
     The controller  340  detects a third user action for selecting a channel number (S 803 ). The third user action may be a user action for generating a drop event in a region at which the channel number is located. The controller  340  controls dropping the dragged human address onto the region at which the channel number selected by the third user action is located, in response to the detected third user action. 
     The controller  340  confirms whether or not a human address associated with the selected channel number is present in a human channel map, in response to the detected third user action (S 804 ). The human channel map may be the human channel map  1210  in  FIG. 12  or may include the human channel map  1210 , the first access information map  1230 , the second access information map  1240 , the third access information map  1250 , the fourth access information map  1260  and the fifth access information map  1270  as illustrated in  FIG. 12 . 
     If the associated human address is present, the controller  304  deletes the associated human address, the selected channel number and information associating the associated human address and the selected channel number with each other from the human channel map (S 805 ). 
     Then, the controller  340  stores the selected human address, the selected channel number and information associating the selected human address and the selected channel number with each other in the human channel map (S 806 ). 
     The controller  340  detects a fourth user action for selecting a broadcast channel (S 807 ). The fourth user action may be a user action for generating a down event in a region at which the broadcast channel is located. 
     The controller  340  detects a fifth user action for requesting dragging (S 808 ). The fifth user action may occur consecutively after the fourth user action. The fifth user action may be a user action for successively generating a dragging event. The controller  340  controls dragging the broadcast channel selected by the fourth user action, in response to the detected fifth user action. 
     The controller  340  detects a sixth user action for selecting a channel number (S 809 ). The sixth user action may be a user action for generating a drop event in a region at which the channel number is located. The controller  340  controls dropping the dragged broadcast channel onto the region at which where the selected channel number is located, in response to the detected sixth user action. 
     The controller  340  confirms whether or not a broadcast channel associated with the selected channel number is present in a broadcast channel map, in response to the detected sixth user action (S 810 ). 
     If the associated broadcast channel is present, the controller  304  deletes the associated broadcast channel, the selected channel number and information associating the associated broadcast channel and the selected channel number with each other from the broadcast channel map (S 811 ). 
     Then, the controller  340  stores the selected broadcast channel, the selected channel number and information associating the selected broadcast channel and the selected channel number with each other in the broadcast channel map (S 812 ). 
     The controller  340  detects a seventh user action for selecting an App channel (S 813 ). The seventh user action may be a user action for generating a down event in a region at which the App channel is located. 
     The controller  340  detects an eighth user action for requesting dragging (S 814 ). The eighth user action may occur consecutively after the seventh user action. The eighth user action may be a user action for successively generating a dragging event. The controller  340  controls dragging the App channel selected by the seventh user action, in response to the detected eighth user action. 
     The controller  340  detects a ninth user action for selecting a channel number (S 815 ). The ninth user action may be a user action for generating a drop event in a region at which the channel number is located. The controller  340  controls dropping the dragged App channel onto the region at which the channel number selected by the ninth user action is present, in response to the detected ninth user action. 
     The controller  340  confirms whether or not an App channel associated with the selected channel number is present in an App channel map, in response to the detected ninth user action (S 816 ). 
     If the associated App channel is present, the controller  304  deletes the associated App channel, the selected channel number and information associating the associated App channel and the selected channel number with each other from the App channel map (S 817 ). 
     Then, the controller  340  stores the selected App channel, the selected channel number and information associating the selected App channel and the selected channel number with each other in the App channel map (S 818 ). 
       FIG. 35  is a diagram illustrating an exemplary embodiment of a broadcast screen on which a human channel map is displayed. 
     Referring to  FIG. 35 , the display  302  may display a screen  3500 . The screen  3500  displays a broadcast program  3510  of a broadcast channel and a human channel map. If the controller  340  detects a user action for requesting display of a human channel map in a state in which the broadcast program  3510  is displayed on the screen  3500 , the controller  340  may control displaying a human channel map  3520  in response to the detected user action. 
     The human channel map  3520  displays a human address  3531  and a channel number  3533  associated with the human address  3531 , which are stored in the human channel map  1210  of  FIG. 12 . The human channel map  3520  also displays a broadcast channel  3535  that a person indicated by the human address  3531  is viewing, a broadcast program  3537  and display time information  3539  of the broadcast program  3537 . A channel guiding signal (or a signal or message for identifying a channel), which includes at least one of the broadcast channel  3535 , the broadcast program  3537  or the display time information  3539 , may be received according to Step S 310  of  FIG. 18 . That is, instead of content, the channel guiding signal is received in Step S 310 . 
     In some embodiments, the channel guiding signal may be received from the server  10  illustrated in  FIG. 1 . 
     The controller  340  may transmit a channel guiding signal, which includes at least one of the broadcast program  3510  which is being displayed, a broadcast channel which broadcasts the broadcast program  3510  or display time information of the broadcast program  3510 , to an electronic device or a server. The channel guiding signal may be transmitted in a constant period or whenever a broadcast program being displayed is switched. The controller  340  may transmit the channel guiding signal to the electronic device or the server according to an access method associated with the channel numbers included in the human channel map. The server for receiving the channel guiding signal may be the server  10  illustrated in  FIG. 1 . The human channel map may be the human channel map  1210  in  FIG. 12 , or may include the human channel map  1210 , the first access information map  1230 , the second access information map  1240 , the third access information map  1250 , the fourth access information map  1260  and the fifth access information map  1270  as illustrated in  FIG. 12 . 
       FIG. 36  is a diagram illustrating an exemplary embodiment of a screen for invitation to view a channel. 
     Referring to  FIG. 36 , the display  302  may display a GUI  3600 . If the controller  340  detects a user action for requesting display of a human channel map while a broadcast program  3610  is being displayed on the screen  3600 , the controller  340  may control displaying a human channel map  3620  in response to the detected user action. 
     The human channel map  3620  displays the human address ‘Me’ and the channel number ‘00’ associated with the human address ‘Me’, which are stored in the human channel map  1210  of  FIG. 12 . 
     The user may drag a broadcast program from an original display region  3610  thereof to the human channel map  3620  and then, may drop the dragged broadcast program  3630  onto a position at which a human channel  3622  is located. The controller  340  may control displaying an image  3630  representing the dragged broadcast program on the screen, in response to the user dragging action. The controller  340  also generates and controls transmitting a channel viewing request signal for requesting viewing of the broadcast program  3630  to an electronic device (e.g., a remote multi-functional display device) associated with the human channel  3622 . The channel viewing request signal may be transmitted to the electronic device or the server according to an access method associated with the channel numbers included in the human channel map. The human channel map may be the human channel map  1210  in  FIG. 12 , or may include the human channel map  1210 , the first access information map  1230 , the second access information map  1240 , the third access information map  1250 , the fourth access information map  1260  and the fifth access information map  1270  as illustrated in  FIG. 12 . 
     In some embodiments, the controller  340  may control transmission of the signal for requesting viewing of the broadcast program  3630  to the server. The server may be the server  10  illustrated in  FIG. 1 . 
     In some embodiments, when the image  3630  is located at the human channel, the controller  340  may control displaying a message ‘User B’ which represents a human address associated with the human channel. 
     In some embodiments, if the controller  340  detects a user action for selecting the broadcast program  3610  and a user action for selecting the channel number, the controller  340  controls transmitting a channel viewing request signal for requesting viewing of the broadcast program  3610  to an electronic device associated with the human channel indicated by the selected channel number, in response to the detected user action for selecting the channel number. The user action for selecting the broadcast program  3630  is, for example, touching a region where the broadcast program  3630  is displayed, pressing a predetermined button (e.g., a ‘select’ button) in a state in which an indicator is located at the region where the broadcast program  3630  is displayed, and pressing a predetermined button (e.g., a ‘select’ button) in a state in which the region where the broadcast program  3630  is displayed is focused. The user action for selecting the channel number is, for example, pressing a numeric key of a remote controller, touching the human channel listed in the human channel map  3620 , pressing a predetermined button (e.g., a ‘select’ button) in a state in which an indicator is located at the human channel listed in the human channel map  3620 , and pressing a predetermined button (e.g., a ‘select’ button) in a state in which the human channel listed in the human channel map  3620  is focused. 
       FIG. 37  is a schematic diagram illustrating a configuration of another exemplary embodiment of a broadcast system in accordance with the present disclosure. 
     Referring to  FIG. 37 , a broadcast system  3700  in accordance with the present disclosure may include the first server  10 , the second server  20 , the first digital TV  100 , the second digital TV  110 , the personal computer system  120 , the notebook computer  130 , the mobile terminal  140 , a third digital TV  150  and a fourth digital TV  160 . The first server  10 , the second server  20 , the first digital TV  100 , the second digital TV  110 , the personal computer system  120 , the notebook computer  130  and the mobile terminal  140  respectively correspond to the first server  10 , the second server  20 , the first digital TV  100 , the second digital TV  110 , the personal computer system  120 , the notebook computer  130  and the mobile terminal  140  as described above with reference to  FIG. 1  and thus, a detailed description thereof is omitted. Even the third digital TV  150  and the fourth digital TV  160  correspond to the first digital TV  100  and thus, a detailed description thereof is omitted hereinafter. 
     The first digital TV  100 , the second digital TV  110 , the personal computer system  120 , the notebook computer  130 , the mobile terminal  140 , the third digital TV  150  and the fourth digital TV  160  may receive broadcast channels through different transmission media. The first digital TV  100  may receive broadcast channels through a satellite  3 , the second digital TV  110  may receive broadcast channels through a terrestrial broadcast system  4 , and the personal computer system  120  and the notebook computer  130  may receive broadcast channels through an IP network  5 . Also, the mobile terminal  140  may receive broadcast channels through a Digital Multimedia Broadcasting (DMB) system  6 , and the third digital TV  150  and the fourth digital TV  160  may receive broadcast channels through a cable  7 . 
     The first digital TV  100 , the second digital TV  110 , the personal computer system  120 , the notebook computer  130 , the mobile terminal  140 , the third digital TV  150  and the fourth digital TV  160  may receive broadcast channels from different service providers respectively. 
     The first digital TV  100 , the second digital TV  110 , the personal computer system  120 , the notebook computer  130 , the mobile terminal  140 , the third digital TV  150  and the fourth digital TV  160  may receive broadcast channels from the same service provider, and kinds and range of broadcast channels transmitted from the service provider may be identical or different. 
     Even if the first digital TV  100 , the second digital TV  110 , the personal computer system  120 , the notebook computer  130 , the mobile terminal  140 , the third digital TV  150  and the fourth digital TV  160  receive different kinds of broadcast services from different transmission media or service providers, the first digital TV  100 , the second digital TV  110 , the personal computer system  120 , the notebook computer  130 , the mobile terminal  140 , the third digital TV  150  and the fourth digital TV  160  may search for a channel, which provides a broadcast program corresponding to the received channel viewing request signal, using Electronic Program Guide (EPG) data and information included in the received channel viewing request signal, and may receive the broadcast program through the channel. 
       FIG. 38  is a diagram illustrating a configuration of an exemplary embodiment for a channel invitation packet. 
     Referring to  FIG. 38 , the transmitted channel viewing request signal may have a format  3800 . The packet  3800  may include a Details_of_user field, a Physical_channel_details field, a Service_Name field, a Service_ID field, a Channel_number field, an Event_Name field, an Event_ID field, a Transport_Stream_ID field, a Network_ID field, a ServiceProvider field, an Originating_medium field and an Originating_Country field. 
     The Details_of_user field includes detailed user information. Specifically, the Details_of_user field includes detailed information about a user who sends a channel viewing request signal. 
     The Physical_channel_details field includes detailed information about a physical channel which transmits a broadcast program requested to view. 
     The Service_Name field includes a service name of a broadcast program requested to view. 
     The Service_ID field includes a service ID of a broadcast program requested to view. 
     The Channel_number field includes a channel number of a broadcast program requested to view. 
     The Event_Name field includes an event name of a broadcast program requested to view. 
     The Event_ID field includes an event ID of a broadcast program requested to view. 
     The Transport_Stream_ID field includes a transport stream ID of a broadcast program requested to view. 
     The Network_ID field includes a network ID of a broadcast program requested to view. 
     The ServiceProvider field includes information about a service provider for providing a broadcast program requested to view. 
     The Originating_medium field includes information about a transmission medium for transmitting a broadcast program requested to view. 
     The Originating_Country field includes information about a nation or an area (e.g., geographical area or region) from which a broadcast program, requested to view, is transmitted. 
       FIG. 39  is a diagram illustrating an exemplary embodiment of a screen displayed when invitation to view a channel is made. 
     Referring to  FIG. 39 , the display  302  may display a screen  3900 . The screen  3900  displays a broadcast program  3910  and a menu map  3920 . The screen  3900  also displays a guidance message  3930 , which indicates a broadcast channel included in a broadcast viewing request signal, and a message  3940  which indicates a user who sends a broadcast viewing request signal. The guidance message  3930  may be displayed as a message associated with a TV menu item  3922 . 
     The controller  340  controls displaying the guidance message  3930  and the message  3940  when receiving the broadcast viewing request signal. 
       FIG. 40  is a diagram illustrating one exemplary embodiment of a guidance message with regard to invitation to view a channel. 
     Referring to  FIG. 40 , the display  302  may display a guidance message  4010 . If a broadcast viewing request signal is transmitted to the controller  340 , the controller  340  may generate the guidance message  4010  and control displaying the generated guidance message  4010 . In some embodiments, if the controller  340  detects a user action for selecting the guidance message  3930  illustrated in  FIG. 39 , the controller  340  may control displaying the guidance message  4010  in response to the detected user action. 
     The guidance message  4010  informs of a user A who sends a broadcast viewing request signal and makes inquiry about whether or not to view a requested broadcast program (e.g., a dance show on ESPN). The guidance message  4010  includes a ‘Yes’ button  4012  for accepting viewing and a ‘No’ button  4014  for rejecting viewing. In one embodiment, the guidance message  4010  may also display other users who are currently viewing the broadcast program or users who have been invited to view the broadcast program. 
     If the controller  340  detects a user action for accepting invitation to view a channel, the controller  340  controls displaying the requested broadcast program, in response to the detected user action. The user action may be a user action of pressing the button  4012 . 
     If the controller  340  detects a user action for rejecting the invitation to view a channel, the controller  340  controls a screen  4000  to continuously display the broadcast program  3910 . The user action may be a user action of pressing the button  4014 . 
       FIG. 41  is a diagram illustrating another exemplary embodiment of a guidance message with regard to invitation to view a channel. 
     Referring to  FIG. 41 , the display  302  may display a message  4110 . The controller  340  may control displaying the message  4110  when receiving a broadcast viewing request signal. In some embodiments, if the controller  340  detects a user action for selecting the guidance message  3930  illustrated in  FIG. 39 , the controller  340  may control displaying the guidance message  4110  in response to the detected user action. 
     The guidance message  4110  informs of a user A who sends a broadcast viewing request signal and makes inquiry about whether or not to view a channel similar to a requested broadcast channel because the requested broadcast channel is not found. The guidance message  4110  includes a ‘Yes’ button  4112  for accepting viewing and a ‘No’ button  4114  for rejecting viewing. 
     If the controller  340  detects a user action for accepting invitation to view a channel, the controller  340  controls displaying a similar broadcast program, in response to the detected user action. The user action may be a user action of pressing the button  4112 . 
     If the controller  340  detects a user action for rejecting invitation to view a channel, the controller  340  controls a screen  4100  to continuously display the broadcast program  3910 . The user action may be a user action of pressing the button  4114 . 
       FIG. 42  is a diagram illustrating a further exemplary embodiment of a guidance message with regard to invitation to view a channel. 
     Referring to  FIG. 42 , the display  302  may display a guidance message  4210 . The controller  340  may control displaying a guidance message  4210  when receiving a broadcast viewing request signal. In some embodiments, if the controller  340  detects a user action for selecting the guidance message  3930  illustrated in  FIG. 39 , the controller  340  may control displaying the guidance message  4210  in response to the detected user action. 
     The guidance message  4210  informs of a user A who sends a broadcast viewing request signal and also, informs that a channel, which is the same as or similar to a requested broadcast program, is not found. The guidance message  4210  includes an ‘OK’ button  4212 . 
     If the controller  340  detects a user action for confirming that viewing of an invited channel is not possible, the controller  340  removes the guidance message  4210  from a screen  4200  in response to the detected user action and controls the screen  4200  to continuously display the broadcast program  3910 . The user action may be a user action of pressing the button  4212 . 
       FIGS. 43A and 43B  are diagrams illustrating an exemplary embodiment of a screen displayed when invitation to view a channel is accepted. 
     Referring to  FIGS. 43A and 43B , if Patrick accepts a viewing request of Susan, an electronic device of Susan may display a screen  4310  and an electronic device of Patrick may display a screen  4320 . Patrick may accept the viewing request of Susan by pressing the button  4012  of the guidance message  4010  illustrated in  FIG. 40  or the button  4112  of the guidance message  4110  illustrated in  FIG. 41 . 
     As Patrick accepts the viewing request, the electronic device of Patrick stops displaying the broadcast program  3910  and displays the broadcast program  3610  indicated by a broadcast viewing request signal. Thus, the electronic devices of Susan and Patrick display the same broadcast program  3610 . 
     The screen  4310  displays a picture  4315  of Patrick who views the same broadcast, a chat input window  4318  and a chat window  4319 . Susan may chat with Patrick using the chat input window  4318  and the chat window  4319 . 
     The screen  4320  displays a picture  4325  of Susan who views the same broadcast, a chat input window  4328  and a chat window  4329 . Patrick may chat with Susan using the chat input window  4328  and the chat window  4329 . 
       FIG. 44  is a diagram illustrating an exemplary embodiment of a channel matching table. 
     Referring to  FIG. 44 , the server  10  may store a channel matching table  4400 . The server  10  may match channels of electronic devices to each other using the channel matching table  4400 . The server  10  matches a channel indicated by a broadcast viewing request signal to a channel which is receivable by an electronic device to which the broadcast viewing request signal is transmitted, using the channel matching table  4400 . 
     A first electronic device receives a broadcast channel from a service provider  1  and a second electronic device receives a broadcast channel from a service provider  2 . If the first electronic device transmits a channel viewing request signal for inviting a user to view a channel to a user of the second electronic device, the server  10  receives the channel viewing request signal and reads a channel  901  of the service provider  2 , which matches to a channel  101  indicated by the channel viewing request signal, from the channel matching table  4400 . The server  10  amends the channel viewing request signal so as to indicate the channel  901  and transmits the amended channel viewing request signal to the second electronic device. 
     If the channel viewing request signal has the format  3800  illustrated in  FIG. 38 , the server  10  may confirm a service provider of the first electronic device based on information included in the ServiceProvider field. The server  10  may amend information, stored in the Physical_channel_detail field and in the Channel_number field, to detailed information (e.g., 11100 MHZ) about the physical channel  901  matching to the channel  101  indicated by the channel viewing request signal and the channel  901  respectively, and may transmit the amended channel viewing request signal to the second electronic device. 
     The channel matching table  4400  stores information in such a manner that the same channels of different service providers are associated with each other. If the channel  101  and the channel  202  of the service provider  1  are associated respectively with the channel  901  and the channel  345  of the service provider  2 , the channel matching table  4400  may store the channel  910 , the channel  101  and information associating the channels  101  and  910  with each other and also, may store the channel  202 , the channel  345  and information associating the channels  202  and  234  with each other 
     The channel matching table  4400  may store the frequency of each channel. In one example, the channel matching table  4400  stores the frequency of the channel  101  of 10800 MHZ and the frequency of the channel  901  of 11100 MHZ. The channel matching table  4400  may be stored on the originating electronic device (inviter), the destination electronic device (invitee), and/or a server. 
       FIG. 45  is a diagram illustrating an implementation procedure of one exemplary embodiment for a method of making invitation to view a channel in accordance with the present disclosure. 
     Referring to  FIG. 45 , Steps S 900  to S 940  correspond to Steps S 700  to S 740  and thus, a description with respect to Steps S 900  to S 940  refers to Steps S 700  to S 740  and is omitted hereinafter. 
     A first electronic device  4510  transmits a broadcast viewing request signal to a second electronic device  4520  in response to the received connection response signal transmitted in Step S 940  (S 945 ). The second electronic device  4520  receives the broadcast viewing request signal. The broadcast viewing request signal may be transmitted to a port indicated by a port number included in the connection response signal. The broadcast viewing request signal may have the format  3800  illustrated in  FIG. 38 . 
     The second electronic device  4520  transmits a response signal with respect to the broadcast viewing request signal to the first electronic device  4510  in response to the received broadcast viewing request signal (S 950 ). The first electronic device  4510  receives the response signal. The response signal may be one of a viewing acceptance signal, a viewing not possible signal and a viewing rejection signal. 
     The electronic device  4510  and the electronic device  4520  may receive broadcast services from the same service provider or different service providers. Even when the electronic devices  4510  and  4520  receive broadcast services from the same service provider, the electronic devices  4510  and  4520  may receive different kinds of broadcast services and broadcast channels. The electronic device  4520  may confirm whether or not it receives a broadcast service from the same service provider as that in the first electronic device  4510  using information about the service provider included in the broadcast viewing request signal and EPG data. The electronic device  4520  may also confirm that it can receive a viewing requested channel using EPG data and at least one of detailed information about physical channels, service names, service IDs, channel numbers, event names, transport stream IDs or network IDs included in the broadcast viewing request signal. 
     If it is confirmed that the electronic device  4520  receives broadcast services from the same service provider as that in the electronic device  4510 , but cannot receive a viewing requested channel from the service provider, the electronic device  4520  may search for and display a similar channel using EPG data and at least one of detailed information about physical channels, service names, service IDs, channel numbers, event names, transport stream IDs or network IDs included in the broadcast viewing request signal. 
     If the electronic device  4520  and the electronic device  4510  receive broadcast services from different service providers, the electronic device  4520  searches for a channel, which is the same as or similar to a viewing requested channel, from among channels provided by other service providers, based on EPG data and at least one of detailed information about physical channels, service names, service IDs, channel numbers, event names, transport stream IDs, network IDs, nation information or local information included in the channel viewing request signal. The electronic device  4520  may display the located channel. The electronic device  4520  may display one of the guidance message  4010 , the guidance message  4110  and the guidance message  4210  based on the search results. 
     The electronic device  4520  and the electronic device  4510  may receive broadcast services from different transmission media. The electronic device  4520  may confirm this kind of reception using information about a transmission medium included in a broadcast viewing request signal. If it is confirmed that the electronic device  4520  and the electronic device  4510  receive broadcast services from different transmission media, the electronic device  4520  searches for a channel, which is the same as or similar to a viewing requested channel, from among channels provided by other service providers, based on EPG data and at least one of detailed information about physical channels, service names, service IDs, channel numbers, event names, transport stream IDs, network IDs, nation information or local information included in the channel viewing request signal. The electronic device  4520  may display the located channel. The electronic device  4520  may display one of the guidance message  4010 , the guidance message  4110  and the guidance message  4210  based on the search results. 
     If the response signal is a viewing acceptance signal, the first electronic device  4510  may display a screen on which a chat window and a chat input window are displayed, and the second electronic device  4520  may display a screen on which a chat window and a chat input window are displayed. The screen displayed by the first electronic device  4510  may be the screen  4310  and the screen displayed by the second electronic device  4520  may be the screen  4320 . 
     If the response signal is a viewing not possible signal, the first electronic device  4510  may transmit a broadcast program invited to view to the second electronic device  4520 . 
       FIG. 46  is a flowchart illustrating an implement procedure of another exemplary embodiment for a method of making invitation to view a channel in accordance with the present disclosure. 
     Referring to  FIG. 46 , the display  302  displays a human channel map (S 1000 ). The human channel map may be the human channel map  3520  illustrated in  FIG. 35  or the human channel map  3620  illustrated in  FIG. 36 . 
     The external signal input unit  325  receives a signal for requesting channel switch (S 1010 ). The controller  340  detects the received channel switch request signal. The channel switch request signal may be generated when the user performs an action of pressing a predetermined key of a remote controller, or may be a video signal with regard to a spatial gesture for requesting channel switch. 
     The controller  340  controls a screen to display content of a requested channel in response to the detected channel switch request signal (S 1020 ). The channel may be a broadcast channel, a human channel or an App channel. The screen may be the screen  1600  illustrated in  FIG. 16  or the screen  3500  illustrated in  FIG. 35 . 
     The controller  304  detects a user action for requesting invitation to view a channel (S 1030 ). The user action is, for example, an action of dragging a screen on which content is displayed and dropping the dragged screen onto a human channel listed in a human channel map. In one example, the controller  340  may drag the image  3630  illustrated in  FIG. 36  to the human channel ‘43’ and may detect a user action for requesting invitation to view the human channel ‘43’ when the image  3630  drops onto the human channel ‘43’. In another example, the user action may be a combination of a user action for selecting a displayed broadcast program and a user action for selecting a human channel (or a channel number). 
     The controller  340  transmits a channel viewing request signal in response to the detected user action (S 1040 ). The channel viewing request signal may have the format  3800  illustrated in  FIG. 38 . 
     In some embodiments, the controller  340  may control transmitting the channel viewing request signal to the electronic device which provides the human channel indicated by the channel number designated by the user action in Step S 1030 . The address of the electronic device may be acquired by the above described method as illustrated in  FIGS. 19 to 21 . 
     In some embodiments, the controller  340  may control transmitting the channel viewing request signal to a server. The server may be the server  10  illustrated in  FIG. 1 . 
     The controller  340  receives a response signal with respect to the transmitted channel viewing request signal (S 1050 ). The response signal may be one of a viewing acceptance signal, a viewing not possible signal and a viewing rejection signal. 
     If the response signal is a viewing acceptance signal, the controller  340  may display a screen on which a chat window and a chat input window are displayed. The screen may be the screen  4310  illustrated in  FIGS. 43A and 43B . 
     If the response signal is a viewing not possible signal, the controller  340  may transmit a broadcast program invited to view to the electronic device which provides the human channel indicated by the channel number designated by the user action in Step S 1030 . 
       FIG. 47  is a flowchart illustrating an implement procedure of an exemplary embodiment for a method of processing invitation to view a channel in accordance with the present disclosure. 
     Referring to  FIG. 47 , the display  302  displays a broadcast program (S 1100 ). 
     The network interface  302  receives a channel viewing request signal (S 1110 ). The controller  340  generates a guidance message with regard to invitation to view a channel using information included in the received channel viewing request signal. The generated guidance message may be the message  3930  and the message  3940  illustrated in  FIG. 39 , the guidance message  4010  illustrated in  FIG. 40 , the guidance message  4110  illustrated in  FIG. 41 , or the guidance message  4210  illustrated in  FIG. 42 . 
     The controller  340  may confirm whether or not it can receive a viewing requested channel using information included in the channel viewing request signal. The controller  340  may confirm whether or not it can receive a viewing requested channel from a service provider using stored EPG data and information about the service provider included in the channel viewing request signal. The controller  340  generates a guidance message  4010  when it can receive the viewing requested channel from the service provider. 
     Even when the electronic device  300  can receive a broadcast service from a service provider indicated by the channel viewing request signal, the electronic device  300  may fail to receive the viewing requested channel from the service provider according to terms of a contract with the service provider. If this failure to receive the channel is confirmed, the controller  340  may search for a similar channel using EPG data and at least one of detailed information about physical channels, service names, service IDs, channel numbers, event names, transport stream IDs or network IDs included in the channel viewing request signal. If the electronic device  300  succeeds in searching for the similar channel, the controller  340  may generate the guidance message  4110  and if not, may generate the guidance message  4210 . 
     If the controller  340  cannot receive the viewing requested channel from the service provider, the controller  304  confirms whether or not the viewing requested channel is receivable from another service provider. The controller  340  searches for the same channel as the viewing requested channel from among channels provided by another service provider based on EPG data and at least one of detailed information about physical channels, service names, service IDs, channel numbers, event names, transport stream IDs or network IDs included in the channel viewing request signal. If the channel is found, the controller  340  may generate the guidance message  4010 . If the same channel is not found, but a similar channel is found, the controller  340  may generate the guidance message  4110 . If the same channel and the similar channel are not found, the controller  340  may generate the guidance message  4210 . Here, another service provider may be a service provider which provides a broadcast service to the electronic device  300 . 
     The controller  340  may confirm whether or not it can receive the viewing requested channel, using information about a transmission medium included in the channel viewing request signal. If the controller  340  receives a broadcast service from a transmission medium different from that indicated by the channel viewing request signal, the controller  340  searches for the same channel as the viewing requested channel from among channels provided by the different transmission medium, based on EPG data and at least one of detailed information about physical channels, service names, service IDs, channel numbers, event names, transport stream IDs or network IDs included in the channel viewing request signal. If the same channel is found, the controller  340  may generate the guidance message  4010 . If the same channel is not found, but a similar channel is found, the controller  340  may generate the guidance message  4110 . If the same channel and the similar channel are not found, the controller  340  may generate the guidance message  4210 . 
     The display  302  displays the guidance message generated in Step S 1110  on a screen (S 1120 ). The screen may be one of the screen  3900 , the screen  4000 , the screen  4100  and the screen  4200  as illustrated in  FIGS. 39 to 42 . After the display  302  displays the screen  3900 , one of the screen  4000 , the screen  4100  and the screen  4200  may be displayed under control of the controller  340 . If the controller  340  detects a user action for selecting the message  3930  in a state in which the screen  3900  is displayed, the controller  340  may control displaying one of the screen  4000 , the screen  4100  and the screen  4200 . 
     The controller  340  confirms whether or not a user action for accepting invitation to view a channel is detected (S 1130 ). The controller  340  may detect a user action for rejecting invitation to view a channel and also, may detect a user action for confirming that viewing of an invited channel is not possible. The user actions may be performed according to the above described method as illustrated in  FIGS. 40 to 42 . 
     The controller  340  controls displaying content of a channel indicated by the channel viewing request signal in response to the detected user action for accepting invitation to view the channel (S 1140 ). If the guidance message  4110  is displayed in Step S 1120 , the controller  340  controls displaying content of a channel similar to the channel indicated by the channel viewing request signal. 
     The controller  340  controls transmitting a response signal with respect to the channel viewing request signal to the electronic device which transmits the channel viewing request signal (S 1150 ). The response signal may include a viewing acceptance signal, a viewing not possible signal or a viewing rejection signal. The controller  340  transmits the viewing acceptance signal when detecting a user action for accepting invitation to view a channel, the viewing rejection signal when detecting a user action for rejecting invitation to view a channel, and the viewing not possible signal when detecting a user action confirming that viewing of a channel is not possible. 
     When the viewing not possible signal is transmitted, the electronic device, which transmits the channel viewing request signal, may directly transmit the viewing requested broadcast program to the network interface  320 . The controller  340  may control displaying the broadcast program received by the network interface  320 . 
       FIG. 48  is a diagram illustrating an embodiment of a screen on which content is displayed,  FIG. 49  is a diagram illustrating one embodiment of a screen on which content is displayed in a simultaneous viewing mode, and  FIG. 50  is a diagram illustrating another embodiment of a screen on which content is displayed in a simultaneous viewing mode. 
     Referring to  FIGS. 48 to 50 , the display  302  may display a screen  4800 . The screen  4800  displays content. 
     If the controller  340  detects a user action for requesting display of content, the controller  340  may control displaying the screen  4800  in response to the detected user action. Also, if the controller  340  detects a user action for requesting a simultaneous viewing mode during display of the screen  4800 , the controller  340  may control display of a screen  4900  or a screen  5000 . The controller  340  may convert the screen  4900  to the screen  5000  or convert the screen  5000  to the screen  4900  according to a user action for requesting mode conversion. 
     The screen  4900  includes a content display region  4910  and a chat region  4920 . The content display region  4910  displays content of the screen  4800 , and the chat region  4920  includes a chat window  4930  and a chat input window  4940 . The chat window  4930  shows a chat partner  4931  and a chat phrase  4932  input by a chat partner. The user can input a chat phrase into the chat input window  4940 . 
     The screen  5000  may include a content display region  5010 , a chat input window  5020 , silhouette selecting marks  5021  to  5028 , and silhouettes  5031 ,  5033 ,  5035  and  5037 . The silhouettes  5031 ,  5033 ,  5035  and  5037  respectively represent chat partners. The silhouette  5031  represents a chat partner ‘Arry’, the silhouette  5033  represents a chat partner ‘David’, the silhouette  5035  represents the user who is in charge of the chat, and the silhouette  5037  represents a chat partner ‘Susan’. A chat phrase may be displayed at a location associated with the user or the chat partner who inputs the chat phrase. For example, if the chat partner ‘David’ inputs a chat phrase  5043 , the chat phrase  5043  is displayed at a location associated with the silhouette  5033  of ‘David’. 
     If the controller  340  detects a user action for selecting one of the silhouette selecting marks  5021  to  5028 , the controller  340  controls display of the silhouette  5035  of the user in response to the detected user action such that the silhouette  5035  is converted to a silhouette image associated with the selected silhouette selecting mark. Additionally, the controller  340  may transmit a signal to request conversion to the silhouette image to the server  10 , the server  20 , or other electronic devices. 
     A human channel owner who is viewing the same content may be determined as a chat partner. More particularly, the human channel owner who is viewing the same content as that displayed on the screen  4800  may be automatically determined as a chat partner. In some embodiments, the controller  340  may confirm the owner based on information included in the above described channel guiding signal of  FIG. 35 . In some embodiments, the controller  340  may receive an owner list, including the human channel owner who is viewing the same content, from the server  10  and confirm the owner via the received owner list. 
       FIG. 51  is a diagram illustrating a further embodiment of a screen on which content is displayed in a simultaneous viewing mode. 
     Referring to  FIG. 51 , silhouettes  5110 ,  5120 ,  5130 ,  5140  and  5150  may be displayed as 3D images having a particular depth value  5160 . More particularly, the silhouettes  5031 ,  5033 ,  5035  and  5037  of  FIG. 50  may be respectively displayed as the 3D images  5110 ,  5120 ,  5130  and  5140 . 
       FIG. 52  is a diagram explaining an embodiment of a method for confirming viewing of the same content. 
     Referring to  FIG. 52 , a controller of an electronic device  5210  may control transmission of an image frame request signal  5221  to an electronic device  5250 . The electronic device  5250  may be an electronic device associated with a human channel included in a human channel map that is stored in the electronic device  5210 . The image frame request signal  5211  may be transmitted to the electronic device or the server according to a connection method associated with a channel number included in the human channel map. 
     The image frame request signal  5211  may be a signal to request that an image frame be displayed for a particular period of time M starting from a particular time T. The electronic device  5250  receives the image frame request signal  5211  and acquires an image frame  5253  to be displayed for a particular period of time M starting from a particular time T according to the received image frame request signal  5211 . The controller of the electronic device  5210  controls acquisition of an image frame  5213  to be displayed for a particular period of time M starting from a particular time T. 
     The electronic device  5250  transmits an image frame transmission signal  5255  to the electronic device  5210 . The image frame transmission signal  5255  includes the image frame  5253 . 
     The electronic device  5210  receives the transmitted image frame transmission signal  5255  and executes a comparison algorithm  5215  to confirm whether or not the image frame  5253  included in the received image frame transmission signal  5255  is equal to the image frame  5213 . If the two image frames are equal to each other, the controller of the electronic device  5210  confirms that an owner of a human channel associated with the electronic device  5210  is viewing the same content. If the two image frames are not equal to each other, the controller of the electronic device  5210  can confirm that the owner is not viewing the same content. The comparison algorithm  5215  can confirm the equality of image frames in sequence starting from a particular time T. In this case, if the image frames have different resolutions, confirmation of the equality may be performed after equalizing the resolutions of the image frame  5213  and the image frame  5253 . 
     With the method for confirming viewing of the same content as described in relation to  FIG. 52 , a controller of one electronic device can confirm whether or not content displayed thereon is equal to content displayed on another electronic device, irrespective of different service providers and transmission media. 
       FIG. 53  is a diagram explaining a method for detecting user emotions. 
     Referring to  FIG. 53 , while a viewer  5301  is viewing content  5300 , the image capture device  301  may capture an image of the viewer  5301 . 
     The controller  340  detects a face zone from the captured image frame of the viewer  5301  output by the image capture device  301 . Then, the controller  340  confirms the emotions of the viewer  5301  based on the detected face zone. The controller  340  may produce emotion data indicating the confirmed emotions and then, control transmission of the produced emotion data to an electronic device of a chat partner. 
     The image capture device  301  may capture the image of the viewer  5301  at a preset interval. The controller  340  may confirm the emotions of the viewer  5301  at the preset interval and then, produce emotion data if emotion change occurs, thereby controlling transmission of the emotion data to the electronic device of the chat partner. 
       FIG. 54  is a diagram illustrating the contour of a silhouette mapped to user emotions. 
     Referring to  FIG. 54 , the storage unit  345  may store the contour of a silhouette associated with particular emotions. For example, the storage unit  345  may store the contour of a silhouette  5410  associated with sadness, the contour of a silhouette  5420  associated with anger, and the contour of a silhouette  5430  associated with happiness. 
       FIG. 55  is a diagram illustrating an embodiment of a screen on which different silhouettes depending on user emotions are displayed. 
     Referring to  FIG. 55 , the controller  340  may acquire the contour of a silhouette associated with the confirmed emotions from the storage unit  345  and control display of a silhouette of an owner of the electronic device  300  such that the silhouette is converted to the acquired contour of a silhouette. Also, the controller  340  may acquire the contour of a silhouette, associated with emotions indicated by emotion data transmitted from the electronic device of the chat partner, from the storage unit  345  and control display of a silhouette of the chat partner such that the silhouette is converted to the acquired contour of a silhouette. 
     In one example, if it is confirmed that the owner of the electronic device  300  is angry, the controller  340  controls display of a silhouette  5520 . If the controller  340  receives emotion data indicating sadness from an electronic device of a first chat partner, the controller  340  controls display of a silhouette of the first chat partner as a silhouette  5510 . In addition, if the controller  340  receives emotion data indicating happiness from an electronic device of a second chat partner, the controller  340  controls display of a silhouette of the second chat partner as a silhouette  5530 . 
       FIG. 56  is a diagram explaining a procedure for registering a facial image, and  FIG. 57  is a diagram explaining a procedure for training a facial image. 
     Referring to  FIGS. 56 and 57 , the electronic device  300  may receive a user facial image  5620  on a per emotion basis registered by a user  5610 . In one example, the electronic device  300  may receive an angry facial image  5710 , a sad facial image  5720  and a happy facial image  5730 , which are registered by the user  5610 . The storage unit  345  may store the respective registered facial images  5710 ,  5720  and  5730  on a per emotion basis. 
     The controller  340  may compare the facial images on a per emotion basis stored in the storage unit  345  with a facial image  5740  detected from an image frame of a viewer which is captured while the viewer is viewing content and then, confirm one of the stored facial images that is most similar to the facial image  5740 . The controller  340  may confirm the emotions of the confirmed facial image as the emotions of the viewer. Also, the controller  340  may store the facial image  5740  as a facial image having the confirmed emotions in the storage unit  345 . In one example, if it is confirmed that the facial image  5740  is most similar to the facial image  5710 , the controller  340  may add the facial image  5740  as an angry emotional facial image, similar to the facial image  5710 , to the storage unit  345 . With such addition of the facial image, the electronic device  300  can more accurately confirm the emotions of the viewer. 
       FIG. 58  is a diagram explaining a method for detecting a user motion. 
     Referring to  FIG. 58 , while a viewer  5801  is viewing content  5800 , the image capture device  301  may capture an image of the viewer  5801 . 
     The controller  340  detects a user motion  5810  from a captured image frame of the viewer  5801  output by the image capture device  301 . Then, the controller  340  may produce motion data indicating the confirmed motion  5810  and then, control transmission of the produced motion data to the electronic device of the chat partner. 
     The image capture device  301  may capture the image of the viewer  5801  at a preset interval. The controller  340  may confirm the motion of the viewer  5301  at the preset interval and then, produce motion data if motion change occurs, thereby controlling transmission of the motion data to the electronic device of the chat partner. 
     The controller  340  may control display of a silhouette of the owner of the electronic device  300  such that the silhouette represents the confirmed motion  5810 . Also, the controller  340  may control display of a silhouette of the chat partner such that the silhouette is converted to the contour of a silhouette representing a motion indicated by the motion data transmitted from the electronic device of the chat partner. 
       FIGS. 59A to 59D  are diagrams explaining a method for reflecting a screen effect on content. 
     Referring to  FIGS. 59A to 59D , a screen effect window  5910  may be displayed on a screen  5900 . The screen effect window  5910  may include one or more screen effect selecting regions  5911 ,  5912  and  5913 . The user may perform a user action for selecting one of the screen effect selecting regions  5911 ,  5912  and  5913 , and the controller  340  may detect the user action as a user action for requesting a screen effect. The controller  340  may detect the user action for requesting a screen effect, produce screen effect data indicating the screen effect in response to the detected user action, and control transmission of the produced effect data to the electronic device of the chat partner. In one example, if the user performs a user action  5920  for selecting the screen effect selecting region  5911 , the controller  340  may produce screen effect data indicating a screen effect of the screen effect selecting region  5911  and then, control transmission of the produced screen effect data to the electronic device of the chat partner. 
     In addition, if the user performs the user action  5920  for selecting the screen effect selecting region  5911 , the controller  340  controls display of a mark  5930  indicating that the screen effect selecting region  5911  is selected and then, controls reflection of a screen effect  5940  of the screen effect selecting region  5911  on the displayed content  5900 . Here, a position of the screen effect  5940  may be selected as the user clicks a corresponding region. 
     If the controller  340  receives the screen effect data from the electronic device of the chat partner, the controller  340  may control reflecting an effect indicated by the received screen effect data on the displayed content  5900 . 
     The controller  340  may control the video decoder  330  to change pixel data of the image frame according to the screen effect. Additionally, the controller  340  may produce On Screen Display (OSD) according to the screen effect, thereby controlling display of the OSD on a content display region. 
       FIG. 60  is a flowchart illustrating an implementation procedure of an exemplary embodiment in relation to a method for remotely viewing content at the same time. 
     Referring to  FIG. 60 , the controller  340  detects a user action for requesting display of content (S 1200 ). 
     The controller  340  confirms whether or not a viewing mode is a simultaneous viewing mode in response to the detected user action (S 1210 ). The simultaneous viewing mode may be setup by initial values, or may be setup by the user as necessary. 
     If the viewing mode is the simultaneous viewing mode, the controller  340  confirms the presence of a human channel owner who is viewing the requested content (S 1220 ). Here, Step S 1220  may include an implementation procedure of a method for confirming viewing of the same content that will be described hereinafter with reference to  FIG. 64  or  65 . 
     The controller  340  controls display of content in the simultaneous viewing mode (S 1230 ). The display  302  may display one of the screen  4900 , the screen  5000  and the screen  5100 . The screen  4900 , the screen  5000  and the screen  5100  may represent the owner confirmed in Step S 1220  as a chat partner. That is, the owner confirmed in Step S 1220  becomes a chat partner. 
     If the viewing mode is not the simultaneous viewing mode, the controller  340  controls display of the requested content (S 1240 ). The display  302  may display the screen  4800 . 
     The method for remotely viewing content at the same time of  FIG. 60  may further include an implementation procedure of a method that will be described hereinafter with reference to  FIGS. 67 to 70 . 
       FIG. 61  is a flowchart illustrating an implementation procedure of another exemplary embodiment in relation to a method for remotely viewing content at the same time. 
     Referring to  FIG. 61 , the display  302  displays content (S 1300 ). The display  302  may display the screen  4800 . 
     The controller  340  detects a user action for requesting a simultaneous viewing mode (S 1310 ). 
     The controller  340  confirms the presence of a human channel owner who is viewing the displayed content in response to the detected user action (S 1320 ). Here, Step S 1320  may include the implementation procedure of the method for confirming viewing of the same content that will be described hereinafter with reference to  FIG. 64  or  65 . 
     The controller  340  controls display of content in the simultaneous viewing mode (S 1330 ). The display  302  may display one of the screen  4900 , the screen  5000  and the screen  5100 . The screen  4900 , the screen  5000  and the screen  5100  may represent the owner confirmed in Step S 1320  as a chat partner. That is, the owner confirmed in Step S 1320  becomes a chat partner. 
     The method for remotely viewing content at the same time of  FIG. 61  may further include the implementation procedure of the method that will be described hereinafter with reference to  FIGS. 67 to 70 . 
       FIG. 62  is a flowchart illustrating an implementation procedure of another exemplary embodiment in relation to a method for remotely viewing content at the same time. 
     Referring to  FIG. 62 , the display  302  displays content (S 1400 ). The display  302  may display the screen  4800 . 
     The controller  340  confirms the presence of a human channel owner who is viewing the displayed content (S 1410 ). Here, Step S 1410  may include the implementation procedure of the method for confirming viewing of the same content that will be described hereinafter with reference to  FIG. 64  or  65 . 
     The controller  340  detects a user action for requesting a simultaneous viewing mode (S 1420 ). 
     The controller  340  controls display of content in the simultaneous viewing mode in response to the detected user action (S 1430 ). The display  302  may display one of the screen  4900 , the screen  5000  and the screen  5100 . The screen  4900 , the screen  5000  and the screen  5100  may represent the owner confirmed in Step S 1410  as a chat partner. That is, the owner confirmed in Step S 1410  becomes a chat partner. 
     The method for remotely viewing content at the same time of  FIG. 62  may further include the implementation procedure of the method that will be illustrated hereinafter with reference to  FIGS. 67 to 70 . 
       FIG. 63  is a flowchart illustrating an implementation procedure of a further exemplary embodiment in relation to a method for remotely viewing content at the same time. 
     Referring to  FIG. 63 , the display  302  displays content (S 1500 ). The display  302  may display the screen  1600 , the screen  3500 , or the screen  4800 . 
     The controller  340  detects a user action for requesting invitation to view a channel (S 1510 ). In one example, the user action may be an action for dragging a screen on which content is displayed and dropping the content to a human channel listed in a human channel map. More particularly, the controller  340  may detect the user action for requesting invitation to view a channel if the image  3630  illustrated in  FIG. 36  is dragged to and drops onto the human channel number ‘43’. In another example, the user action may be a combination of a user action for selecting a displayed broadcast program and a user action for selecting a human channel (or a channel number). 
     The controller  340  controls transmission of a channel viewing request signal in response to the detected user action (S 1520 ). The channel viewing request signal may have the format  3800  illustrated in  FIG. 38 . 
     In some embodiments, the controller  340  may control transmission of the channel viewing request signal to the electronic device which provides the human channel indicated by the channel number designated by the user action in Step S 1510 . An address of the electronic device may be acquired by the above described method of  FIGS. 19 to 21 . 
     In some embodiments, the controller  340  may control transmission of the channel viewing request signal to the server. The server may be the server  10  illustrated in  FIG. 1 . 
     The network interface  320  receives a response signal with respect to the channel viewing request signal (S 1530 ). The response signal may be one of a viewing acceptance signal, a viewing not possible signal and a viewing rejection signal. 
     If the response signal is a viewing acceptance signal, the controller  340  controls display of content in the simultaneous viewing mode (S 1540 ). The display  302  may display one of the screen  4900 , the screen  5000  and the screen  5100 . Also, the screen  4900 , the screen  5000  and the screen  5100  may represent an owner of a human channel associated with the electronic device which has transmitted the viewing acceptance signal. The owner becomes a chat partner. 
     The method for remotely viewing content at the same time of  FIG. 63  may further include the implementation procedure of the method that will be described hereinafter with reference to  FIGS. 67 to 70 . 
       FIG. 64  is a flowchart illustrating an implementation procedure of an exemplary embodiment in relation to a method for confirming viewing of the same content. 
     Referring to  FIG. 64 , the controller  340  acquires an address of the electronic device based on a human channel map (S 1600 ). The human channel map may be the human channel map  1210  of  FIG. 12 , or may include the human channel map  1210 , the first connection information map  1230 , the second connection information map  1240 , the third connection information map  1250 , the fourth connection information map  1260  and the fifth connection information map  1270  as illustrated in  FIG. 12 . The address of the electronic device may be acquired by the above described method of  FIGS. 19 to 21 . The electronic device may be limited to an online electronic device. 
     The controller  340  controls transmission of a viewing information request signal using the acquired address of the electronic device (S 1610 ). The viewing information request signal may be the image frame request signal as described above in relation to  FIG. 52 . 
     The network interface  320  receives a viewing information signal (S 1620 ). In some embodiments, the viewing information signal may have the format  3800  illustrated in  FIG. 38 . In some embodiments, the viewing information signal may be the image frame transmission signal as described above in relation to  FIG. 52 . 
     The controller  340  confirms the presence of a human channel owner who is viewing the displayed content based on the received viewing information signal (S 1630 ). In some embodiments, the controller  340  may confirm the owner by comparing the above described information of  FIG. 38 . In some embodiments, the controller  340  may confirm the owner based on the above described comparison algorithm  5215  of  FIG. 52 . 
       FIG. 65  is a flowchart illustrating an implementation procedure of another exemplary embodiment in relation to a method for confirming viewing of the same content. 
     Referring to  FIG. 65 , the controller  340  controls transmission of an owner list request signal to the server (S 1700 ). The transmitted owner list request signal may be a signal to request a list of owners who are viewing the displayed content. The server may be the server  10 . 
     The network interface  320  receives an owner list from the server (S 1710 ). The owner list includes owners who are viewing the displayed content. In some embodiments, the owner list may further include at least one of emotion data or motion data of owners included therein. 
     The controller  340  confirms the owners included in the received owner list as owners who are viewing the displayed content (S 1720 ). 
       FIG. 66  is a flowchart illustrating an implementation procedure of an exemplary embodiment in relation to a method for providing a viewing list. 
     Referring to  FIG. 66 , the server  10  receives a channel viewing signal including content viewing information from the electronic device (S 1800 ). The received content viewing information may include the above described information of  FIG. 38 . In some embodiments, the content viewing information may further include at least one of emotion data or motion data of the owner of the human channel associated with the electronic device. 
     The server  10  constructs a viewing map using the received content viewing information (S 1810 ). The constructed viewing map may include at least one of identification information about content that every human channel owner is viewing, emotion data, motion data or group information. The group information indicates a group of owners who are viewing the same content. 
     The server  10  receives an owner list request signal from the electronic device (S 1820 ). The owner list request signal corresponds to the above described owner list request signal of  FIG. 65 . 
     The server  10  constructs an owner list using the constructed viewing map (S 1830 ). The owner list corresponds to the above described owner list of  FIG. 65 . The server  10  may add owners having the same group information to the owner list. 
     The server  10  transmits the constructed owner list to the electronic device that has transmitted the owner list request signal (S 1840 ). 
       FIG. 67  is a flowchart illustrating an implementation procedure of an exemplary embodiment in relation to a method for displaying a silhouette. 
     Referring to  FIG. 67 , the controller  340  detects a face zone of an owner from an image captured by the owner (S 1900 ). The owner may be a human channel owner or a viewer who is viewing content. In one example, the owner may be the viewer  5301  of  FIG. 53 . The image capture device  301  may capture an image of the owner at a preset interval, and the controller  340  may detect a face of the owner from the captured image at the preset interval. 
     The controller  340  confirms the emotions of the owner based on the detected face zone (S 1910 ). The controller  340  may confirm the emotions of the owner by the above described method of  FIGS. 56 and 57 . Then, the controller  340  may produce emotion data indicating the confirmed emotions. In some embodiments, the controller  340  may produce emotion data if emotion change occurs. 
     The controller  340  controls transmission of the emotion data indicating the confirmed emotions (S 1920 ). In some embodiments, the controller  340  may control transmission of the emotion data if emotion change occurs. 
     The controller  340  controls change of the contour of a silhouette according to the confirmed emotions (S 1930 ). The controller  340  may change the contour of a silhouette using the above described method of  FIG. 55 . 
     The network interface  320  receives emotion data (S 1940 ). In some embodiments, the emotion data may be transmitted from the electronic device of the chat partner. In some embodiments, the emotion data may be transmitted from the server  10 . 
     The controller  340  controls change of the contour of a silhouette of an owner who has transmitted the emotion data according to the received emotion data (S 1950 ). The controller  340  may change the contour of a silhouette using the above described method of  FIG. 55 . 
       FIG. 68  is a flowchart illustrating an implementation procedure of another exemplary embodiment in relation to a method for displaying a silhouette. 
     Referring to  FIG. 68 , the controller  340  detects a motion of an owner (S 2000 ). The owner may be an owner of a human channel and may be a viewer who is viewing content. In one example, the owner may be the viewer  5801  of  FIG. 58 , and the controller  340  may detect a motion of the owner by the above described method of  FIG. 58 . 
     In some embodiments, the image capture device  301  may capture an image of the owner, and the controller  340  may detect a motion of the owner from an image frame included in the captured image of the owner. 
     The controller  340  produces motion data indicating the detected motion (S 2010 ). In some embodiments, the controller  340  may produce motion data if motion change occurs. 
     The controller  340  controls transmission of the produced motion data (S 2020 ). In some embodiments, the controller  340  may control transmission of the motion data if motion change occurs. 
     The controller  340  controls change of the contour of a silhouette according to the detected motion (S 2030 ). The controller  340  may change the contour of a silhouette using the above described method of  FIG. 58 . 
     The network interface  320  receives motion data (S 2040 ). In some embodiments, the motion data may be transmitted from the electronic device of the chat partner. In some embodiments, the motion data may be transmitted from the server  10 . 
     The controller  340  controls change of the contour of a silhouette of an owner who has transmitted motion data according to the received motion data (S 2050 ). The controller  340  may change the contour of a silhouette using the above described method of  FIG. 58 . 
       FIG. 69  is a flowchart illustrating an implementation procedure of an exemplary embodiment in relation to a method for displaying a silhouette as a 3D image. 
     Referring to  FIG. 69 , the controller  340  selects a silhouette image (S 2100 ). The silhouette image may be selected by the above described method of  FIG. 67  or  68 . More particularly, the silhouette image may be selected according to the detected emotions or emotions indicated by the received emotion data, or may be selected according to the detected motion or a motion indicated by the detected motion data. 
     The controller  340  produces a left view image and a right view image using the selected silhouette image (S 2110 ). In one example, the produced left view image and the produced right view image may be utilized to display the silhouette  5110  of  FIG. 51 . 
     The controller  340  controls mixing of each of the produced left view image and the produced right view image with an image frame of content to be displayed (S 2120 ). The mixer  360  may mix the left view image with the image frame of the content to thereby produce a left view image frame, or may mix the right view image with the image frame of the content to thereby produce a right view image frame. In one example, the image frame may be the image frame displayed on the screen of  FIG. 51 . 
     The formatter  370  may perform sampling of the left view image frame and the right view image frame output by the mixer  360  to obtain a 3D output format that can be displayed as a 3D image by the display  302 . 
     The display  302  displays a mixed image frame (S 2130 ). The mixed image frame may be an image frame having the 3D output format obtained by sampling the left view image frame and the right view image frame produced by the mixer  360  in Step S 2120 . In one example, the display  302  may display the screen  5100  in Step S 2130 . 
       FIG. 70  is a flowchart illustrating an implementation procedure of an exemplary embodiment in relation to a method for sharing a screen effect. 
     Referring to  FIG. 70 , the controller  340  detects a user action for requesting a screen effect (S 2200 ). The user action may be a user action for selecting one of the screen effect selecting regions  5911 ,  5912  and  5913  of  FIGS. 59A to 59D . 
     The controller  340  produces screen effect data indicating the requested screen effect in response to the detected user action (S 2210 ). 
     The controller  340  transmits the produced screen effect data to the electronic device of the chat partner or the server  10  (S 2220 ). 
     The controller  340  controls reflection of the requested screen effect on the displayed content (S 2230 ). The display  302  may display the screen  5900  of  FIG. 59D . 
     The network interface  320  receives screen effect data from the electronic device of the chat partner or the server  10  (S 2240 ). 
     The controller  340  controls reflection of the screen effect indicated by the received screen effect data on the displayed content (S 2250 ). The display  302  may display the screen  5900  of  FIG. 59D . 
       FIG. 71  is a diagram illustrating a broadcast screen on which one exemplary embodiment of a channel map is displayed. 
     Referring to  FIG. 71 , the display  302  may display a screen  7100 . If the controller  340  detects a user action for requesting a channel map in a state in which a broadcast program  7110  is displayed on the screen  7100 , the controller  340  controls displaying a broadcast channel map  7120  on the screen  7100  in response to the detected user action. In some embodiments, the user action for requesting the channel map may be an action in which the user presses a hot key for the channel map or a menu item for the channel map. 
     If the controller  340  detects a user action for requesting channel map switch in a state in which a human channel map  7220  illustrated in  FIG. 72  or an App channel map  7320  illustrated in  FIG. 73  is displayed, the controller  340  controls displaying the broadcast channel map  7120 . 
     The broadcast channel map  7120  lists broadcast channels (e.g., CNN), today&#39;s broadcast content on broadcast channels (e.g., CNN News) and channel numbers associated with the broadcast channels (e.g., 39). With relation to the broadcast program  7110  being displayed, a corresponding broadcast channel ‘NBC’, broadcast program name or title ‘Home’ and channel number ‘37’ are listed in a line indicated by an indicator. If the user performs a user action for selecting one of the broadcast channels listed in the broadcast channel map  7120 , the controller  340  controls displaying a broadcast program of the selected broadcast channel. 
       FIG. 72  is a diagram illustrating a broadcast screen on which another exemplary embodiment of a channel map is displayed. 
     Referring to  FIG. 72 , the display  302  may display a screen  7200 . If the controller  340  detects a user action for requesting channel map switch in a state in which the broadcast channel map  7120  illustrated in  FIG. 71  or the App channel map  7320  illustrated in  FIG. 73  is displayed, the controller  340  controls displaying the human channel map  7220 . In some embodiments, the user action may be an action in which the user presses one of a left key and a right key of a remote controller. 
     During display of the human channel map  7220 , the controller  340  may control displaying content of one human channel listed in the human channel map  7220 . The content may be received according to Step S 310  of  FIG. 18 . The human channel map  7220  may be identical to the human channel map  1510  illustrated in  FIG. 15 . 
       FIG. 73  is a diagram illustrating a broadcast screen on which a further exemplary embodiment of a channel map is displayed. 
     Referring to  FIG. 73 , the display  302  may display a screen  7300 . If the controller  340  detects a user action for requesting channel map switch in a state in which the broadcast channel map  7120  illustrated in  FIG. 71  or the human channel map  7220  illustrated in  FIG. 72  is displayed, the controller  340  controls displaying the App channel map  7320 . In some embodiments, the user action may be an action in which the user presses one of a left key and a right key of a remote controller. 
     The App channel map  7320  lists App channels (e.g., Netflix), App content and channel numbers associated with the App channels (e.g., 55). The controller  340  may control display of the App channel map  7320  in such a manner that a line, on which an App channel ‘Google’ which provides App content ‘Google Earth’, denoted by reference numeral  7310 , displayed on the screen  7300 , and a channel number ‘56’ are listed, is indicated by an indicator. The controller  340  may control display of the App channel map  7320  in such a manner that App content of one App channel listed in the App channel map  7320  is displayed. If the user performs a user action for selecting one of the App channels listed in the App channel map  7320 , the controller  340  may control displaying App content of the selected App channel. 
       FIG. 74  is a diagram illustrating a screen on which one exemplary embodiment of a full channel map is displayed. 
     Referring to  FIG. 74 , the display  302  may display a screen  7400 . If the controller  340  detects a user action for requesting a full channel map, the controller  340  may control displaying a full channel map on the screen  7400  in response to the detected user action. The full channel map may be a channel map that is displayed in a full channel mode, for example, on the entire display area or a full screen image. In some embodiments, the user action may be an action in which the user presses a hot key for the full channel map or a menu item for the full channel map. 
     The full channel map  7400  may display multiple channels maps corresponding to different types of content, for example, broadcast content, SNS content, and application content. The different types of content may be associated with different types of channels. The full channel map  7400  includes a line  7410  on which at least one broadcast channel is listed, a line  7420  on which at least one human channel is listed and a line  7430  on which at least one App channel is listed. These lines  7410 ,  7420  and  7430  are respectively provided at the first cell thereof with a mark  7411 ,  7421 ,  7431  indicating which one of the broadcast channel, human channel or App channel is listed. The mark  7411 ,  7421 ,  7431  may be an icon or a selectable link, and may include an image representative of the type of channel. In one embodiment, a selection of a mark may display a channel map of the corresponding type on the full screen. For example, if the mark  7411  for broadcast channel is selected, each of the three rows  7410 ,  7420 ,  7430  may broadcast channels. 
     In some embodiments, the full channel map may be organized in such a manner that at least one broadcast channel is listed on one line, at least one human channel is listed on another line and at least one App channel is listed on the other line. 
     In the full channel map  7400 , movement between channels in the same line may depend upon input of a left key or a right key, and movement between different lines may depend upon input of an up key or a down key. If the user performs a user action for designating one of the channels listed in the full channel map  7400 , the controller  340  may control displaying content of the designated channel. The content may be received according to Step S 310  illustrated in  FIG. 18 . 
       FIG. 75  is a diagram illustrating a screen on which another exemplary embodiment of a full channel map is displayed. 
     Referring to  FIG. 75 , the display  302  may display a screen  7500 . If the controller  340  detects a user action for requesting a full channel map, the controller  340  may control displaying a full channel map on the screen  7500  in response to the detected user action. In some embodiments, the user action may be an action in which the user presses a hot key for the full channel map or a menu item for the pull channel map. 
     The full channel map  7500  lists broadcast channels  7510 , human channels  7520  and  7530  and App channels  7540 . The full channel map  7500  may list these channels in order of channel numbers. The full channel map  7500  may be sorted alphabetically, by user rating (e.g., favorites), based on type of channel, or the full channel map  7500  may be displayed in a custom order as set by a user. In the example as illustrated in  FIG. 75 , in the full channel map  7500 , a broadcast channel ‘Star Plus’ corresponding to a channel number ‘20’ is located at an uppermost position, a radio channel ‘MTV Radio’ corresponding to a channel number ‘21’ is located immediately below the broadcast channel ‘Star Plus’, and a human channel ‘Brandon’ corresponding to a channel number ‘22’ is located immediately below the radio channel ‘MTV Radio’. An App channel ‘Picasa’ corresponding to a channel number ‘26’ is located at a lowermost position. Channels of different types may be assigned the same channel numbers (e.g., SNS channel 26 for Susan and App Channel 26 for Picasa). In this case, channels may be sorted based on type as predetermined or set by the user. 
     When the user inputs a particular number, channel numbers associated with the particular number may be listed in the full channel map  7500 . A region  7505  of the full channel map  7500  shows a number input by the user. In the drawing, as the region  7505  shows “2-”, channels, which have channel numbers in a range of 20 to 29 associated with “2-”, are displayed on the full channel map  7500 . 
     If the user performs a user action for designating one of the channels listed in the full channel map  7500 , the controller  340  may control displaying content of the designated channel. The content may be received according to Step S 310  illustrated in  FIG. 18 . 
       FIG. 76  is a diagram illustrating a screen on which another exemplary embodiment of a full channel map is displayed. 
     Referring to  FIG. 76 , the display  302  may display a full channel map  7600 . If the controller  340  detects a user action for requesting a full channel map, the controller  340  may control displaying a full channel map  7600  on a screen in response to the detected user action. In some embodiments, the user action may be an action in which the user presses a hot key for the full channel map or a menu item for the full channel map. 
     The full channel map  7600  includes a broadcast channel sheet (or page), a human channel sheet and an App channel sheet. The broadcast channel sheet, human channel sheet and App channel sheet may be selected respectively using a sheet tab  7601 , a sheet tab  7602  and a sheet tab  7603 . Specifically, if the user performs an action of pressing one of the sheet tabs  7601 ,  7602  and  7603 , the controller  340  may control displaying a sheet associated with the pressed sheet tab. 
     During display of the full channel map  7600  on the screen, the controller  340  may control displaying one of the broadcast channel sheet, human channel sheet and App channel sheet. In  FIG. 76 , a broadcast channel sheet  7610  is displayed. The broadcast channel sheet  7610  may include a mark  7612  indicating that the broadcast channel is a TV channel and a mark  7614  indicating that the broadcast channel is a radio channel. Each cell of the broadcast channel sheet  7610  includes a broadcast channel (e.g., Colors) and a channel number (e.g., T01) associated with the broadcast channel. If the user performs an action of pressing one of cells on the broadcast channel sheet  7610 , the controller  340  controls displaying a broadcast program on the broadcast channel of the pressed cell. 
       FIG. 77  is a diagram illustrating a screen on which the human channel sheet of the full channel map of  FIG. 76  is displayed. 
     Referring to  FIG. 77 , if the user performs a user action for selecting the sheet tab  7602 , the controller  340  detects the user action and controls displaying a human channel sheet  7710  of the full channel map  7700  in response to the detected user action. 
     Each cell of the human channel sheet  7710  includes a human channel (e.g., Brandon) and a channel number (e.g., 22) associated with the human channel. If the user performs an action of pressing one of cells on the human channel sheet  7710 , the controller  340  may control displaying content of the human channel of the pressed cell. The content may be received according to Step S 310  illustrated in  FIG. 18 . 
       FIG. 78  is a diagram illustrating a screen on which the App channel sheet of the full channel map of  FIG. 76  is displayed. 
     Referring to  FIG. 78 , if the user performs an action for selecting the sheet tab  7603 , the controller  340  detects the user action and controls displaying an App channel sheet  4210  on the full channel map  7800  in response to the detected user action. 
     Each of the App channel sheet  7810  includes an App channel (e.g., NFS9) and a channel number (e.g., 01) associated with the App channel. If the user performs an action of pressing one of cells on the App channel sheet  7810 , the controller  340  may control displaying content of the App channel of the pressed cell. 
       FIG. 79  is a diagram illustrating a screen on which an exemplary embodiment of a recently viewed channel map is displayed. 
     Referring to  FIG. 79 , the display  302  may display a recently viewed channel map  7900 . If the controller  340  detects a user action for requesting a recently viewed channel map, the controller  340  may control displaying the recently viewed channel map  7900  on a screen in response to the detected user action. In some embodiments, the user action may be an action in which the user presses a hot key for the recently viewed channel map or a menu item for the recently viewed channel map. 
     The recently viewed channel map  7900  lists broadcast channels, human channels and App channels displayed within a preset period. The preset period may be 1 day, 7 days, 10 days, 15 days and 30 days. The preset period may be an initially set value, or may be set by the user. 
     The recently viewed channel map  7900  displays channels on a per line basis. The first cell of each line indicates that the channel corresponds to which one of the broadcast channel, human channel and App channel. For example, a mark ‘TV’ on the first cell indicates a broadcast channel, a mark ‘Radio’ indicates a radio channel, a mark ‘SNS’ indicates a human channel and a mark ‘APP’ indicates an App channel. 
     The recently viewed channel map  7900  may list the channels in reverse order of displayed time. For example, in the recently viewed channel map  7900 , a broadcast channel ‘Set Max’, which was broadcast before a broadcast channel ‘Star Plus’, is located behind the broadcast channel ‘Start Plus’. 
     If the user performs a user action of pressing one of the lines listed in the recently viewed channel map  7900 , the controller  340  may control displaying content of the channel indicated by the pressed line. The content may be received according to Step S 310  illustrated in  FIG. 18 . 
       FIG. 80  is a diagram illustrating a screen on which a further exemplary embodiment of a full channel map is displayed. 
     Referring to  FIG. 80 , the display  302  may display a full channel map  8000 . If the controller  340  detects a user action for requesting a full channel map, the controller  340  may control displaying the full channel map  8000  on a screen in response to the detected user action. The user action may be an action in which the user presses a hot key for the full channel map or a menu item for the full channel map. 
     The full channel map  8000  has the same configuration as the full channel map  7400  and further includes connection state marks  8050  and  8055  (also status indicator) for indicating the online state of an owner of a human channel. A first connection state mark  8050  indicates a first online state which represents whether or not the owner of the human channel is online via an electronic device. A second connection state mark  8055  indicates a second online state which represents whether or not the owner is logged in to a server. The server may be the server  10  or the server  20  illustrated in  FIG. 1 , and the electronic device may be the first digital TV  100 , the second digital TV  110 , the personal computer system  120 , the notebook computer  130  or the mobile terminal  140  illustrated in  FIG. 1 . That the owner is online via the electronic device means that another electronic device is connectable to the electronic device through a human channel. That the owner is logged in to the server means that another owner may communicate with the owner through the network  1 . For example, if the first connection state mark  8050  is inactive (off) and the second connection state mark  8055  is active (on), the owner is not connected through their digital TV but is connected through their SNS account. 
     Information about the online state of the owner may be received from the electronic device or the server. The electronic device may periodically receive information about the first online state or information about the second online state from the server. 
     The electronic device may transmit information about the first online state to an electronic device or server associated with the human channel stored in the human channel map. In some embodiments, the electronic device may transmit information about the first online state to all electronic devices associated with the human channel. In some embodiments, the electronic device may transmit information about the first online state to an electronic device which is online, among the electronic devices associated with the human channel. 
       FIGS. 81A to 81D  are diagrams illustrating the online state of the owner of the human channel. 
     The online state of the owner of the human channel may be illustrated as in  FIGS. 81A to 81D . The human channel map  8000  may provide human channels listed therein with connection state marks as illustrated in  FIGS. 81A to 81D . 
     In  FIG. 81A , a connection state mark  8111  indicates the first online state for representing that the owner of the human channel is not online, and a connection state mark  8115  indicates the second online state for representing that the owner is not logged in to the server. 
     In  FIG. 81B , a connection state mark  8121  indicates the first online state for representing that the owner of the human channel is online, and a connection state mark  8125  indicates the second online state for representing that the owner is not logged in to the server. 
     In  FIG. 81C , a connection state mark  8131  indicates the first online state for representing that the owner of the human channel is not online, and a connection state mark  8135  indicates the second online state for representing that the owner is logged in to the server. 
     In  FIG. 81D , a connection state mark  8141  indicates the first online state for representing that the owner of the human channel is online, and a connection state mark  8145  indicates the second online state for representing that the owner is logged in to the server. 
       FIG. 82  is a flowchart illustrating an implement procedure of an exemplary embodiment for a method of providing a channel map service in accordance with the present disclosure. 
     Referring to  FIG. 82 , the display  302  displays a broadcast channel map including at least one broadcast channel on a screen on which content is being displayed (S 2300 ). The broadcast channel map may be the broadcast channel map  7120  illustrated in  FIG. 71 . 
     The controller  340  detects a first user action for requesting channel map switch (S 2305 ). In some embodiments, the first user action may be an action in which the user presses one of an up key, a down key, a left key and a right key of a remote controller. 
     The controller  340  switches the displayed broadcast channel map to a human channel map including at least one human channel in response to the detected first user action (S 2310 ). The controller  340  may control displaying content of one of human channels included in the human channel map on the screen. The selected human channel may have a first channel number, a medium channel number or a last channel number, and may be a human channel more recently displayed than other human channels. The human channel map may be the human channel map  7220  illustrated in  FIG. 72 . 
     The controller  340  detects a second user action for requesting channel switch (S 2315 ). In some embodiments, the second user action may be an action in which the user presses one of an up key, a down key, a left key and a right key of a remote controller. In some embodiments, if the first user action for requesting channel map switch is an action of pressing the left key or right key of a remote controller, the second user action for requesting channel switch may be an action of pressing the up key or down key of the remote controller. 
     The controller  340  switches a selected human channel to another human channel in the human channel map in response to the detected second user action (S 2320 ). 
     The controller  340  controls displaying content of the switched human channel (S 2325 ). The content may be received according to Step S 310  in  FIG. 18 . 
     The controller  340  detects a third user action for requesting channel map switch (S 2330 ). 
     The controller  340  switches the human channel map to an App channel map including at least one App channel in response to the detected third user action (S 2335 ). The App channel map may be the App channel map  7320  illustrated in  FIG. 73 . 
     The controller  340  detects a fourth user action for requesting a full channel map (S 2340 ). In some embodiments, the fourth user action may be an action in which the user presses a hot key for the full channel map or a menu item for the full channel map. 
     The controller  340  controls displaying a full channel map including the at least one broadcast channel, the at least one human channel and the at least one App channel in response to the detected fourth user action (S 2345 ). The full channel map may be one of the full channel map  7400  illustrated in  FIG. 74 , the full channel map  7500  illustrated in  FIG. 75 , the full channel map  7600  illustrated in  FIG. 76  and the full channel map  8000  illustrated in  FIG. 80 . 
     The controller  340  detects a fifth user action for requesting a recently viewed channel map (S 2350 ). In some embodiments, the fifth user action may be a user action of pressing a hot key for the recently viewed channel map or a menu item for the recently viewed channel map. 
     The controller  340  controls displaying the recently viewed channel map including broadcast channels, human channels and App channels displayed within a preset period in response to the detected fifth user action (S 2355 ). The recently viewed channel map may be the recently viewed channel map  7900  illustrated in  FIG. 79 . The preset period may be 1 day, 7 days, 10 days, 15 days and 30 days. The preset period may be an initially set value, or may be set by the user. 
       FIG. 83  is a flowchart illustrating an implementation procedure of an exemplary embodiment in relation to a user registration method in accordance with the present disclosure. 
     Referring to  FIG. 83 , the controller  340  controls display of a GUI for reception of user registration information (S 2400 ). The GUI may be displayed upon initial execution (booting) of the electronic device  300  or upon receiving a user request. The user registration information may include at least one of a device serial number, a user name, a user ID, a password, connection information, gender information, the date of a birth, nation information or locale information. The connection information may include at least one of an e-mail address, an SIP address, an IP address, a port number, a MAC address, an SNS account or URL. 
       FIG. 84  is a diagram illustrating an embodiment of a GUI for reception of user registration information. 
     Referring to  FIG. 84 , the display  302  may display a GUI  8400  in Step S 2400 . The GUI  8400  serves to receive user registration information. The GUI  8400  includes input boxes to input a user ID, a password, a first name and a last name, check boxes to select gender information and list boxes to select the date of a birth. A ‘Next’ button serves to display a next screen, an ‘Exit’ button serves to end the user registration method. The controller  340  may control display of a screen of a next step in response to a detected user action pushing the ‘Next’ button, and may control end of the user registration method in response to a detected user action pushing the ‘Exit’ button. 
     The controller  340  controls display of a GUI for selection of an SNS site (S 2410 ). If the controller  340  detects a user action for pushing the ‘Next’ button, the controller  340  may control display of the GUI in response to the detected user action. A list of SNS sites may be previously stored and the controller  340  may control display of the previously stored list on the GUI. 
       FIG. 85  is a diagram illustrating an embodiment of a GUI for selection of an SNS site. 
     Referring to  FIG. 85 , the display  302  may display a GUI  8500  in Step S 2410 . The GUI  8500  includes SNS sites  8511  to  8519 , check boxes  8521  to  8529  to select the SNS sites  8511  to  8519  respectively, and a check box  8530  to select the SNS sites  8511  to  8519  in all. A list of the SNS sites  8511  to  8519  may be previously stored in the storage unit  345 . Also, the list of the SNS sites  8511  to  8519  may be updated. 
     The controller  340  controls display of a GUI for reception of SNS site authentication information (S 2420 ). If the controller  340  detects a user action for pushing the ‘Next’ button, the controller  340  may control display of the GUI in response to the detected user action. The authentication information may include a user ID and a password. The user ID may be an e-mail address registered in an SNS site. 
     The number of the GUI to be displayed may be equal to the number of SNS sites selected in Step S 2410 . That is, the GUI for reception of authentication information with respect to each selected SNS site may be displayed. 
       FIG. 86  is a diagram illustrating an embodiment of a GUI for reception of authentication information for an SNS site. 
     Referring to  FIG. 86 , the display  302  may display a GUI  8600  in Step S 2420 . The GUI  8600  includes an icon  8610 , and input boxes to input an e-mail ID and a password for an SNS site indicated by the icon  8610 . 
     The controller  340  controls display of a GUI for confirmation of channel scan execution (S 2430 ). If the controller  340  detects a user action for pushing the ‘Next’ button, the controller  340  may control display of the GUI in response to the detected user action. 
       FIG. 87  is a diagram illustrating an embodiment of a GUI for confirmation of channel scan execution. 
     Referring to  FIG. 87 , the display  302  may display a GUI  8700  in Step S 2430 . The GUI  8700  includes a guidance phrase  8710  to ask whether or not to execute a channel scan, a ‘Yes’ button to select execution of a channel scan, and an ‘Exit’ button to prevent execution of the channel scan. The controller  340  may control the progress of a method for providing a channel scan interface of  FIG. 88  in response to a detected user action selecting the ‘Yes’ button. 
     The user registration information and the SNS site authentication information, which are input during implementation of the user registration method of  FIG. 83 , may be transmitted to the server  10  in each input step and may be transmitted to the server  10  after completion of Step S 2430 . 
       FIG. 88  is a flowchart illustrating an implementation procedure of an exemplary embodiment in relation to a method for providing a channel scan interface in accordance with the present disclosure. 
     Referring to  FIG. 88 , the controller  340  controls display of a GUI for selection of a scan method (S 2500 ). The GUI may be displayed automatically or by a user request after implementation of a server registration method. Alternatively, the GUI may be displayed at an optional time by a user request, or may be displayed during update. The scan method may include at least one of auto scan or manual scan. The GUI may include a scan method option to select at least one scan method. 
       FIG. 89  is a diagram illustrating an embodiment of a GUI for selection of a scan method. 
     Referring to  FIG. 89 , the display  302  may display a GUI  8900  in Step S 2500 . The GUI  8900  includes a scan method option  8910  to select auto scan and a scan method option  8920  to select manual scan. 
     The controller  340  confirms whether or not the scan method option is selected (S 2510 ). 
     If the scan method option indicating auto scan is selected, the controller  340  controls display of a GUI for selection of a service type (S 2520 ). The GUI may include a service type option to select at least one service type. The service type indicates one of a broadcast channel, an App channel or a human channel. 
       FIG. 90  is a diagram illustrating an embodiment of a GUI for selection of a service type. 
     Referring to  FIG. 90 , the display  302  may display a GUI  9000  in Step S 2520 . The GUI  9000  may include a service type option  9010  (TV) to select a channel scan of a broadcast channel, a service type option  9020  (APPS) to select a channel scan of an App channel, and a service type option  9030  (Human) to select a channel scan of a human channel. 
     The controller  340  confirms whether or not a particular service type option among the service type options provided by the GUI  9000  for selection of a service type option is selected (S 2530 ). 
     If the particular service type option is selected, the controller  340  controls execution of a channel scan with respect to a channel associated with the selected service type option (S 2540 ). In one example, if the service type option  9010  is selected, the controller  340  controls execution of a channel scan with respect to a broadcast channel. If the service type option  9030  is selected, the controller  340  controls execution of a channel scan with respect to a human channel. 
       FIG. 91  is a diagram illustrating an embodiment of a screen, which displays the progress of a human channel scan. 
     Referring to  FIG. 91 , the display  302  may display a screen  9100  in Step S 2540 . The screen  9100  displays a status bar  9110  representing the degree of progress of the human channel scan. The screen  9100  displays a list  9120  of SNS sites as an object of the human channel scan. The SNS sites included in the SNS site list  9120  may be SNS sites selected during implementation of the user registration method of  FIG. 83 . The screen  9100  may further display a region  9130  to display the result of scan up to now. In the screen  9100 , a ‘Skip’ button serves to stop a channel scan and select display of the result of scan up to that time, and an ‘Exit’ button serves to select end of a channel scan. The controller  340  may stop channel scan in response to a detected user action selecting the ‘Skip’ button and then, proceed to Step  2550 . Also, the controller  340  controls end of a channel scan in response to a detected user action selecting the ‘Exit’ button. 
     The controller  340  controls display of the result of a channel scan (S 2550 ). The controller  340  may control display of the result of a channel scan if channel scan is completed. 
     If the controller  340  detects a user action for selecting the ‘Skip’ button of the screen  9100 , the controller  340  may control display of the result of a channel scan in response to the detected user action. The displayed result of a channel scan is the result of channel scan up to a time when the channel scan is stopped. In one embodiment, the ‘Skip’ button may be configured to skip current SNS service provider to scan the next SNS service provider, rather than skipping all remaining SNS service providers. 
       FIG. 92  is a diagram illustrating an embodiment of a screen, which displays the result of a human channel scan. 
     Referring to  FIG. 92 , the display  302  may display a screen  9200  in Step S 2550 . The screen  9200  displays the result of a human channel scan. 
     The screen  9200  displays an SNS account selecting region  9210 , an update statistical information region  9220 , a channel input box  9230 , an SNS site selecting region  9250 , an icon  9201  to display a selected SNS site, an ‘Add’ button, a ‘Back’ button and a ‘Home’ button. The SNS account selecting region  9210  includes a picture  9211  of a selected SNS account, a button  9213  to select a previous SNS account, a button  9215  to select a next SNS account, and a mark  9217  to display the total number of SNS accounts scanned in a selected SNS site and the order of a selected SNS account. 
     The update statistical information region  9220  displays update statistical information about the selected SNS account  9211 . The update statistical information may include at least one of the number of updated videos, the number of updated pictures or the number of updated messages. 
     The channel input box  9230  displays a channel number assigned to the selected SNS account  9211 . If a channel number is not assigned to the selected SNS account  9211 , the channel input box  9230  may be a blank. The user may input a channel number to be assigned to the selected SNS account  9211  into the channel input box  9230 . In one embodiment, a selection of channel input box  9230  may display a pop-up window to display available channel number from which to choose from to assign to the SNS account. 
     The SNS site selecting region  9250  displays icons of SNS sites or SNS providers. If the user selects any one of the icons displayed on the SNS site selecting region  9250 , the controller  340  controls selection of SNS accounts, scanned in the SNS site indicated by the selected icon, from the SNS account selecting region  9210 . 
     The icon  9201  displays a selected SNS site. The user may select an SNS account, scanned in the SNS site indicated by the icon  9201 , from the SNS account selecting region  9210 . 
     The ‘Add’ button serves to receive a request for construction of a channel map, the ‘Back’ button serves to receive a request for display of a previous screen, and the ‘Home’ button serves to receive a request for display of a home page. 
       FIG. 93  is a diagram illustrating another embodiment of a screen which displays the result of a human channel scan. 
     Referring to  FIG. 93 , the display  302  may display a screen  9300  in Step S 2550 . The screen  9300  is a screen to display the result of a human channel scan. The screen  9300  may include a friend list (or contact list) region  9310 , a mutual friend list region  9320 , a scan result statistical information region  9330  and an SNS site selecting region  9350 . 
     The SNS site selecting region  9350  is a region corresponding to the SNS site selecting region  9250  of  FIG. 92  and thus, a detailed description thereof is substituted by the description of  FIG. 92 . The friend list region  9310  displays a list of friends registered in an SNS site selected from the SNS site selecting region  9350 . The user can select a particular friend (or contact) from the friend list region  9310 . For example, a pointer  9360  may be used to select an icon  9317  for Iva&#39;s SNS account. The friend list region  9310  may display SNS accounts of the friends. 
     Connection state marks  9311  and  9315  serve to display whether or not a corresponding friend is connected. More particularly, the connection state mark  9311  may represent an online state displayed by one of the connection state marks  8111 ,  8121 ,  8131  and  8141  of  FIG. 81 , and the connection state mark  9315  may represent an online state displayed by one of the connection state marks  8115 ,  8125 ,  8135  and  8145  of  FIG. 81 . 
     The mutual friend list region  9320  displays a list of mutual friends of the friend selected from the friend list region  9310 . The mutual friend list region  9320  may display SNS accounts of the mutual friends. For example, if icon  9317  for Iva&#39;s SNS account is selected, mutual friends of both Iva and John may be displayed in the mutual friend list region  9320 . 
     In one embodiment, region  9320  may display a list of SNS accounts for friends of the friends for whom the information is requested. For example, referring to  FIG. 93 , if icon  9317  is selected for Iva&#39;s SNS account (e.g., Hi5 account) region  9320  may display a list of potential or possible friends between John and Iva&#39;s friends, e.g., a list of friends of friends. The icons for these friends may also include connection state marks  9311 ,  9315  to indicate whether the users are online using their electronic device or logged in to their SNS account at a server. In one embodiment, the list of mutual friends and the list of friends of friends may list only those users who have registered to use their electronic device to access human channels, e.g., their SNS accounts through a channel on their multi-purpose display device, or the list may include only those users who are currently logged in. These preference settings for the user may store the configuration and other settings for the display regions. 
     The information region  9330  displays a message  9331  for representing whether or not a human channel of the friend selected from the friend list region  9310  is available, a message  9333  for representing a human channel number assigned to the selected friend, and a message  9335  for representing the number of mutual friends of the selected friend. For example, if the icon  9317  for Iva&#39;s SNS account is selected, the scan result statistical information region  9330  may display information related to Iva&#39;s account. In this Example, Iva has 12 friends in common with John&#39;s SNS account and Iva&#39;s SNS account is accessible on channel number  27  of the electronic device  100 . 
     The user may select a particular SNS account from among SNS accounts displayed on the friend list region  9310  and the mutual friend list region  9320  and then, assign a channel number to the selected particular SNS account. 
     The controller  340  constructs a channel map (S 2560 ). The controller  340  may proceed to Step S 2560  if the controller  340  detects a user action for requesting assignment of a channel with respect to the particular SNS account from a screen on which the result of a channel scan is displayed. The user action may be a user action for selecting the ‘Add’ button of  FIG. 92 . 
     If the controller  340  detects the user action for selecting the ‘Add’ button of  FIG. 92 , the controller  340  assigns a channel number, which has input into the channel input box  9230 , to the selected SNS account  9211  in response to the detected user action. The controller  340  may store the selected SNS account  9211 , the channel number input into the channel input box  9230  and information associating the selected SNS account  9211  and the channel number input into the channel input box  9230  with each other. The human channel map may be a human channel map illustrated in  FIG. 12 , or may be a human channel map illustrated in  FIG. 97  that will be described hereinafter. 
     Step S 2560  may include the implementation procedure of the method for constructing a human channel map in relation to  FIG. 13  or the implementation procedure of the method for constructing a human channel map in relation to  FIGS. 34A and 34B . The screen  9200  of  FIG. 92  and the screen  9300  of  FIG. 93  may be a first GUI for designation of the human address in Step S 100 . The SNS accounts displayed on the SNS account selecting region  9210 , the friend list region  9320  and the mutual friend list region  9330  may be selectable human addresses listed in the first GUI. 
       FIG. 94  is a flowchart illustrating an implementation procedure of an exemplary embodiment in relation to a method for scanning a human channel in accordance with the present disclosure. 
     Referring to  FIG. 94 , an electronic device  9410  transmits a friend information request signal to request information about friends to a relay server  9420  (S 2600 ). The information about friends may include, for example, a list of new or potential friends, mutual friends, or updates for existing friends such as status updates, newly uploaded content, whether they are using human channel services, or another appropriate type of information. The transmission of the friend information request signal may be performed in Step S 2540  of  FIG. 88  to scan one or more SNS servers for friend information. Step S 2540  may include the implementation procedure of the method for scanning a human channel in relation to  FIG. 94 . The friend information request signal may include a user ID. The user ID may be an account of the relay server  9420 , or may be information registered in the server  10  during implementation of the user registration method of  FIG. 83 . In some embodiments, the friend information request signal may further include a single or a plurality of SNS accounts, passwords with respect to the included SNS accounts and site names of the SNS sites. 
     The relay server  9420  transmits the friend information request signal to request friend information to a first SNS server  9430  (S 2610 ). The server  9420  may be the server  10 , and the transmitted friend information request signal may include an account information for an account on the first SNS server  9430  and may further include a password for the account. The account information on the first SNS server  9430  and the password for the account may be previously stored in the relay server  9420 , may have been transmitted to the server  10  during implementation of the user registration method of  FIG. 83 , or may be included in the friend information request signal transmitted in Step S 2600 . 
     The relay server  9420  may associate a single or a plurality of SNS accounts with user IDs and store the associated information. If the relay server  9420  receives the friend information request signal from the electronic device  9410 , the relay server  9240  may search for a user ID and an associated SNS account, and then, transmit the friend information request signal to an SNS server including the searched SNS account. 
     For example, the relay server  9420  may request information from multiple SNS servers if the request for friend information from the electronic device  9410  (or the user account associated with the user ID received from the electronic device  9410 ) includes SNS accounts served on multiple servers (e.g., facebook, twitter). the relay server  9420  transmits the friend information request signal to request friend information to the second SNS server  9440  (S 2620 ). The transmitted friend information request signal may include account information for an account on the second SNS server  9440  and may further include a password for this account. The account information for the account on the second SNS server  9440  may be stored in the relay server  9420 , received from another server, or included in the friend information request. 
     The first SNS server  9430  transmits a friend information signal including friend information to the relay server  9420  (S 2630 ). The friend information may include SNS accounts with respect to friends included in the friend information request signal transmitted in Step S 2610 . The friend information may further include at least one of names of the friends, SNS site IP addresses, port numbers, SNS site names or update information about SNS accounts. The first SNS server  9430  may be the server  20 , or may be one of SNS servers selected during implementation of the user registration method of  FIG. 83 . Additionally, the first SNS server  9430  may have an SNS site name included in the friend information request signal transmitted in Step S 2600 . 
     The second SNS server  9440  transmits a friend information signal including friend information to the relay server  9420  (S 2640 ). The friend information may include SNS accounts with respect to friends included in the friend information request signal transmitted in Step S 2620 . The friend information may further include at least one of names of the friends, SNS site IP addresses, port numbers, SNS site names or update information about SNS accounts. The second SNS server  9440  may be the server  20 , or may be one of SNS servers selected during implementation of the user registration method of  FIG. 83 . Additionally, the second SNS server  9440  may have an SNS site name included in the friend information request signal transmitted in Step S 2600 . 
     The relay server  9420  combines the received friend information (S 2650 ). The relay server  9420  may combine the friend information transmitted from the first SNS server  9430  with the friend information transmitted from the second SNS server  9440 . In addition, the relay server  9420  may combine previously stored information with the friend information transmitted from the first SNS server  9430  or the friend information transmitted from the second SNS server  9440 . Here, the previously stored information may be the SNS site authentication information and the user registration information transmitted by the electronic device  300  during the user registration method of  FIG. 83 . The relay server  9420  may combine the previously stored information and the received friend information with each other based on names or SNS accounts. 
     The relay server  9420  transmits the friend information signal including the friend information to the electronic device  9410  (S 2660 ). The friend information may be information combined in Step  2650 , or may be information selected from the combined information. In some embodiments, the friend information may include at least one of names of friends, SNS site names, SNS accounts or user IDs. In some embodiments, the friend information may include names of friends, connection information and user IDs. In some embodiments, the friend information may include names of friends, connection information, SNS site names, SNS accounts and user IDs. 
     The electronic device  9410  stores the received friend information (S 2670 ). The electronic device  9410  may temporarily or permanently store the received friend information. The stored information may be displayed as the result of a channel scan in Step S 2550  of  FIG. 88 . 
     The electronic device  9410  may construct a human channel map using the received friend information. Information included in the connection information maps  1230 ,  1240 ,  1250 ,  1260  and  1270  of  FIG. 97  may be acquired from the received friend information. 
     In some embodiments, the relay server  9420  may perform Step S 2650  and Step  2660  whenever the friend information is received. For example, the relay server  9420  may perform Step S 2640  and Step S 2660  using the friend information received in Step S 2630 , or may perform Step S 2640  and Step S 2660  using the friend information received in Step S 2640 . Steps S 2640  and S 2660  may be initiated based on friend information received within a predetermined period of time of each other, for example. 
       FIG. 95  is a flowchart illustrating an implementation procedure of another exemplary embodiment in relation to a method for constructing a channel map in accordance with the present disclosure. 
     Referring to  FIG. 95 , the display  302  displays a GUI for designation of a human address (S 2700 ). The GUI may be one of a Web page of  FIG. 4 , the GUI  910  of  FIG. 9 , the GUI  1010  of  FIG. 10 , the GUI  1110  of  FIG. 11 , the GUI  2700  of  FIG. 27 , the GUI  2900  of  FIG. 29 , the GUI  3100  of  FIG. 31 , the screen  9200  of  FIG. 92  and the screen  9300  of  FIG. 93 . 
     The controller  340  detects a first user action for designation of a human address (S 2710 ) of a friend or contact. 
     The controller  340  confirms whether or not a channel number assigned to the friend who is associated with the designated human address is present, in response to the detected first user action (S 2720 ). 
     If the channel number is present, the controller  340  displays the channel number (S 2730 ). In one example, the channel number may be displayed on the input box  9230  of  FIG. 92 , may be displayed on the input box  9333  of  FIG. 93 , or may be displayed on a separately displayed message. The channel number may be highlighted among the channel numbers listed in the channel number region  2710  of the GUI  2700  of  FIG. 27  or among the channel numbers listed in the channel number region  2910  of the GUI  2900  of  FIG. 29 , or may be displayed on the channel number region  3140  of the GUI  3100  of  FIG. 31 . 
     The controller  340  detects a second user action for designation of a channel number (S 2740 ). In the embodiment of the screen  9200  of  FIG. 92 , the second user action may be a user action for pushing the ‘Add’ button. In the embodiment of the screen  9300  of  FIG. 93 , the second user action may be a user action for pushing a button for completing input of a channel number into the input box  9333  (for example, an ‘OK’ button on a remote controller). In the embodiments of the GUI  2700  of  FIG. 27 , the GUI  2900  of  FIG. 29  and the GUI  3100  of  FIG. 31 , the second user action may be a user action including the second user action of Step S 802  of  FIGS. 34A and 34B  and the third user action of Step S 803 . The channel number may be equal to the channel number searched in Step S 2720 . 
     The controller  340  stores the human address, the channel number and information associating the human address and the channel number with each other in a human channel map in response to the detected second user action (S 2750 ). If the channel number is equal to the channel number searched in Step S 2720 , a plurality of human addresses of a single person is assigned to a single channel number. 
     The controller  340  confirms whether or not other human addresses of the friend who is associated with the designated human address are present (S 2760 ). For example, the friend may have multiple SNS accounts such as a human address corresponding to a facebook account and another human address corresponding to an MSN account. 
     If other human addresses are present, the controller  340  controls display of the other human addresses (S 2770 ). 
       FIG. 96  is a diagram illustrating an embodiment of a GUI for display of other human addresses of a friend who has a human address associated with a channel number. 
     Referring to  FIG. 96 , the display  302  may display a message  9600  in Step S 2770 . The message  9600  lists SNS accounts of the other human addresses. In this example, it may be assumed that the human address designated in Step S 2710  is a human address of Lisa. The message  9600  may list SNS accounts  9601 ,  9603 ,  9605  and  9607  as the other human addresses of Lisa, and may include a button  9610  to add additional addresses and a button  9620  to cancel the process. In Step S 2770 , check boxes  9631 ,  9633 ,  9635  and  9637  need not be displayed. 
     The controller  340  displays a GUI for designation of a human address (S 2780 ). The GUI may be displayed if the controller  340  detects a user action for pushing the button  9610  of  FIG. 96 . The display  302  may display the message  9600  including the SNS accounts  9601 ,  9603 ,  9605  and  9607 , the check boxes  9631 ,  9633 ,  9635  and  9637 , the button  9610  and the button  9620 . 
     In some embodiments, Step S 2770  and Step S 2780  may be combined into a single step for displaying a GUI for provision of other human addresses and designation of a particular human address among the other human addresses. The GUI may be the message  9600  including the SNS accounts  9601 ,  9603 ,  9605  and  9607 , the check boxes  9631 ,  9633 ,  9635  and  9637 , the button  9610  and the button  9620 . 
     The controller  340  detects a third user action for designation of a human address (S 2790 ). The third user action may be a user action for pushing the button  9610  of the message  9600  displayed in Step S 2780 . 
     The controller  340  stores the human address, the channel number and information associating the human address and the channel number with each other in the human channel map in response to the detected third user action (S 2795 ). The human address may be a human address checked in the check boxes  9631 ,  9633 ,  9635  and  9637 , and the channel number may be the channel number stored in Step S 2750 . 
       FIG. 97  is a diagram illustrating another exemplary embodiment for a human channel map. 
     The human channel map  1210  of  FIG. 97  further includes a channel number ‘80’ associated with a plurality of human addresses. The channel number ‘80’ is associated with the friend ‘Lisa’, and the friend ‘Lisa’ has a plurality of human addresses (Lisa@TV.com, Lisa@SNS.com and Lisa@facebook.com). That is, the channel number ‘80’ is assigned to each of Lisa@TV.com, Lisa@SNS.com and Lisa@facebook.com. 
     If a pointer indicates a particular table, the controller  340  can confirm that a corresponding channel number is associated with a plurality of human addresses. In one example, if a pointer  9701  of the channel number ‘80’ indicates a table  9700 , the controller  340  confirms that the channel number ‘80’ is associated with a plurality of human addresses. 
     The table  9700  includes the human addresses, i.e. Lisa@TV.com, Lisa@SNS.com and Lisa@facebook.com, associated with the channel number ‘80’, and pointers respectively corresponding to Lisa@TV.com, Lisa@SNS.com and Lisa@facebook.com. The pointers may indicate positions where information associated with the human addresses is stored. 
     The pointer  9711  indicates a position where information associated with Lisa@TV.com is stored. More particularly, the pointer  9711  indicates the third row of the third connection information map  1250 . An IP address associated with Lisa@TV.com is 207.63.107.105, and a port number and an account associated with Lisa@TV.com are 80 and Lisa, respectively. Connection to a channel of Lisa@TV.com may be implemented by the access method denoted by type  3 . 
     The pointer  9712  indicates a position where information associated with Lisa@facebook.com is stored. More particularly, the pointer  9712  indicates the fourth row of the third connection information map  1250 . An IP address associated with Lisa@facebook.com is 204.62.101.95, and a port number and an account associated with Lisa@facebook.com are 80 and Lisa, respectively. Connection to a channel of Lisa@facebook.com may be implemented by the method denoted by type  3 . 
     The pointer  9713  indicates a position where information associated with Lisa@SNS.com is stored. More particularly, the pointer  9713  indicates the fifth row of the third connection information map  1250 . An IP address associated with Lisa@SNS.com is 205.52.108.96, and a port number and an account associated with Lisa@SNS.com are 80 and Lisa, respectively. Connection to a channel of Lisa@SNS.com may be implemented by the access method denoted by type  3 . 
     In the present disclosure, the pointers  9711 ,  9712  and  9713  are not limited to the embodiments indicating the rows of the third connection information map  1250 , and may indicate rows of different connection information maps. In one embodiment, channel 80 may be linked to human addresses for a plurality of different individuals. For example, the human address ‘Lisa’ may be replaced by human address ‘family’ representing a group of individuals. The human addresses in table  9700  may be linked to an SNS account of each of the individual in the group, e.g., human addresses dad and me, in tables  1240  and  1230 , respectively. 
       FIG. 98  is a flowchart illustrating an implementation procedure of another exemplary embodiment in relation to a method for providing a human channel service in accordance with the present disclosure. 
     Referring to  FIG. 98 , the controller  340  detects a user action for requesting conversion to a human channel mode (S 2800 ) (or social network channel mode). In some embodiments, the user action may be a user action for pushing one of an up key, a down key, a right key or a left key of a remote controller, or may be a user action for pushing a mode conversion key (for example, a colored button) of the remote controller. 
     The controller  340  controls display of a human channel map in response to the detected user action (S 2810 ). The display  302  may display the human channel map  7220  illustrated in  FIG. 72 . 
     The controller  340  detects a user action for designation of a channel number (S 2820 ). 
     The controller  340  confirms whether or not a plurality of human addresses is associated with the channel number in response to the detected user action (S 2830 ). The controller  340  can confirm whether or not the plurality of human addresses is associated with the channel number by use of the human channel map. In one example, if a channel number ‘77’ is designated in Step S 2820 , it can be confirmed from the human channel map of  FIG. 97  that the channel number ‘77’ is associated with a single human address. If a channel number ‘80’ is designated in Step S 2820 , it can be confirmed from the human channel map of  FIG. 97  that the channel number ‘80’ is associated with the plurality of human addresses (i.e. Lisa@TV.com, Lisa@SNS.com and Lisa@facebook.com). 
     If the plurality of human addresses is present, the controller  340  controls display of a GUI for designation of a human address (S 2840 ). 
       FIG. 99  is a diagram illustrating an embodiment of a GUI for designation of a human address. 
     Referring to  FIG. 99 , the display  302  may display a GUI  9900  as the GUI for designation of the human address if the user action for designating the channel number ‘80’ is detected in Step S 2820 . The GUI  9900  lists the human addresses Lisa@TV.com, Lisa@SNS.com and Lisa@facebook.com associated with the channel number ‘80’. 
     The controller  340  detects a user action for designation of a human address (S 2850 ). In one example, the user action may be a user action for pushing a particular key (for example, an ‘OK’ key) on a remote controller in a state in which an indicator  9901  of  FIG. 99  is located at a particular human address. The user action designates a human address where the indicator  9901  is located. 
     The controller  340  performs connection to the human address (S 2860 ). If a plurality of human addresses is not associated with the channel number designated in Step S 2820 , the controller  340  performs connection to the human address associated with the channel number designated in Step S 2820 . Also, if a plurality of human addresses is associated with the channel number designated in Step S 2820 , the controller  340  performs connection to the human address designated in Step S 2850 . 
     The controller  340  may display at least one of a Web page associated with the SNS account of the SNS server, a screen captured by the electronic device, a broadcast channel that the user of the electronic device is viewing, content or content list stored in the electronic device, based on the result of connection. The Web page associated with the SNS account of the SNS server may be a home page. 
     Step S 2860  may include at least one step included in the implementation procedure of the method for receiving content of a human channel in relation to  FIGS. 19 to 21 , and may include at least one step included in the implementation procedure of the method for setting connection between electronic devices of  FIG. 26 . 
       FIG. 100  is a diagram illustrating another embodiment of a screen on which a human channel map and content of a selected human channel are displayed. 
     Referring to  FIG. 100 , the controller  340  may control display of a screen  10000  based on the result of connection of Step S 2860 . The screen  10000  is a screen on which a Web page received from the SNS server is displayed. 
     The screen  10000  may include a list region  10010 , a user information region  10020 , a statistical information region  10030 , a friend list region  10040 , a video link  10051 , a picture link  10053  and a message link  10054 . The list region  10010  displays a user question and answers of friends with respect to the question, the user information region  10020  displays brief introduction information with respect to the user, and the statistical information region  10030  displays statistical information. The friend list region  10040  displays a number of followers (other users who are registered to receive information about the user) and following (other users whom the user is registered to receive information about), the video link  10051  is a connection link for a Web page on which unloaded video files can be seen, the picture link  10053  is a connection link for a Web page on which uploaded pictures can be seen, and the message link  10054  is a connection link for a Web page on which messages between the user and the friend(s) can be seen. 
       FIG. 101  is a diagram illustrating an embodiment of a screen on which an Electronic Program Guide (EPG) for a human channel in accordance with the present disclosure is displayed. 
     Referring to  FIG. 101 , the controller  304  may control display of an electronic program guide  10100  for a human channel. The electronic program guide  10100  may be displayed if a user action for requesting the EPG is detected during display of the human channel. If the user action for requesting the EPG is detected during display of a broadcast channel, the controller  340  may control display of an EPG for the broadcast channel. 
     The remote controller  304  may include a button for requesting the electronic program guide  10100  for the human channel. If the controller  340  detects a user action for pushing the button, the controller  340  may control display of the electronic program guide  10100  in response to the detected user action. In one embodiment, the button for requesting the EPG  10100  for the human channel may be a dedicated button. In this case, the EPG for the human channel may be displayed regardless of the type of content that is being displayed, e.g., broadcast, application, or human channel content. Alternatively, the button may be configured to display a particular type of EPG corresponding to the type of content being displayed, e.g., human channel type EPG. 
     The EPG  10100  may be configured as a grid or calendar. The EPG  10100  may include a human indicating cell  10111  at the first row of the first column and a human channel indicating cell  10112  at the first row of the second column, and the other columns of the first row may include date cells  10113  to  10118 . The human indicating cell  10111  displays information indicating that human cells are listed in the first column, the human channel indicating cell  10112  displays information indicating that channel cells are listed in the second column, and the date cells  10113  to  10118  display dates. 
     In some embodiments, if there is no event associated with a particular date, a date cell displaying the particular date need not be displayed. In addition, date cells may be orderly displayed from the date cell  10113  representing a present date to the date cell  10114  representing a future date. 
     The electronic program guide  10100  includes human cells  10121 ,  10131  and  10141  in the other rows of the first column, channel cells  10122 ,  10132  and  10142  in the other rows of the second column and event cells  10123  and  10134  in the other rows of the other columns. The human cells  10121 ,  10131  and  10141  display information associated with owners of the respective human channels. Here, the human cells may display pictures of the owners of the human channels. The channel cells  10122 ,  10132  and  10142  display human channel numbers respectively (e.g., channel numbers 101, 110, and 116). The channel cells  10122 ,  10132  and  10142  may further display human addresses of the owners of the human channels (e.g., Mike, Miranda, and Sweety). In some embodiments, the human cells  10121 ,  10131  and  10141  need not be displayed. 
     The event cells are associated, according to positions thereof, with particular human cells, particular channel cells and particular date cells. More particularly, each event cell is associated with a human cell and a channel cell of the same row and is also associated with a date cell of the same column. The event cell is associated with an event, which is associated with a date displayed by the date cell of the same column, from among events associated with the human channel having the channel number displayed by the channel cell of the same row. 
     The event cell may display at least a part of event information, i.e. information about an associated event. The event information may include an SNS account associated with an event, information about an SNS site to which the event has been uploaded, information about the type of the event, the title of the event, the date of the event and detailed information about the event. The event may include at least one of a schedule, a function, a memorial day or holiday, content, or the like. The content may be a multimedia content such as a picture or video, or the content may be a message or note, for example. 
     The event cells may display at least one of event titles  10151 ,  10152  and  10153 , event icons  10161  and  10162  or event source marks  10171 ,  10172  and  10173 . The event cells may further display a reminder mark  10191  (or indicia). The reminder mark  10191  may be displayed in the case where a reminder for an event is set up. If the reminder is set up, an alarm for the event may be displayed as a message, for example, on the multi-functional display device or may be transmitted to a mobile appliance, an email address, or the like. The reminder may be set up according to a user request. 
     If one event cell is associated with a plurality of events, event information about the plurality of events may be displayed respectively. For example, an event cell  10134  displays a plurality of events  10172  and  10173 . 
       FIG. 102  is a diagram illustrating an embodiment of a screen in which detailed information of an event is displayed on an electronic program guide in accordance with the present disclosure. 
     Referring to  FIG. 102 , the controller  340  may detect a user action for selecting a date cell of the electronic program guide  10200 , for example, using a cursor or an arrow as illustrated. The controller  340  may control display of detailed information  10210  of an event associated with the date cell in response to the detected user action. In one example, if the controller  340  detects a user action for selecting a date cell  10243 , the controller  340  controls display of the detailed information  10210  about a “Match” event associated with the date cell  10243  in response to the detected user action. 
       FIG. 103  is a diagram illustrating an embodiment of a screen in which channel numbers are selected on an electronic program guide in accordance with the present disclosure. 
     Referring to  FIG. 103 , the controller  340  may detect a user action for selecting a human cell of the electronic program guide  10300 . The controller  340  may control display of content of a human channel of a person indicated by the human cell in response to the detected user action. In one example, if the controller  340  detects a user action for selecting a human cell  10341 , the controller  340  controls display of content of a human channel of a person ‘Sweety’ indicated by the human cell  10341  in response to the detected user action. 
       FIG. 104  is a diagram illustrating an embodiment of a screen on which content of a human channel is displayed. 
     Referring to  FIG. 104 , if the controller  340  detects a user action for selecting the human cell  10341 , the controller  340  may control display of content  10400  of a human channel of an owner ‘Sweety’ indicated by the human cell  10341  in response to the detected user action. The screen  10400  may further display a picture  10410  of the owner ‘Sweety’, a human address  10420  of the owner ‘Sweety’ and a channel number  10430  of the human channel of the owner ‘Sweety’. 
     If the content  10400  is a video file, the controller  340  may further display a time guidance graph  10450  which represents a displayed time of the entire playing time of the video file. In the time guidance graph  10450 , a region  10451  means a displayed amount, a region  10453  means an amount to be displayed, and a divider  10455  represents a position of an image being displayed. 
       FIGS. 105 to 107  are diagrams illustrating an embodiment in which an electronic program guide in accordance with the present disclosure is dragged. 
     Referring to  FIGS. 105 to 107 , in a state in which a pointer  10501  is located at the third row of the electronic program guide  10500 , if the controller  340  detects a down event and subsequently, detects at least one drag event, the controller  340  moves the pointer  10501  to a position  10601  in response to the detected down event and the detected drag event. Then, the controller  340  controls display of a part of a date cell  10610  indicating a date after a certain time corresponding to a movement distance of the pointer  10501  has elapsed and at least a part of an event cell  10620  associated with an event of the date. The down event may be a user action for selecting a channel cell  10513 , or may be a user action for selecting one of event cells  10523 ,  10533  and  10543 . 
     If the controller  340  detects an up event after detection of the at least one drag event, the controller  340  controls display of an electronic program guide  10700  including an added column  10710 . The added column  10710  includes a date cell  10713  representing a particular date after the certain time has elapsed and event cells  10723 ,  10724  and  10743  associated with the event of the particular date. The event cell  10723  displays content  10751  and  10752  uploaded at the corresponding date. The number of columns that are added (and the corresponding dates which are displayed) may correspond to an amount in which the cell is dragged in a prescribed direction. Additionally, the direction in which a cell is dragged may determine whether previous or later dates are added to the EPG. For example, dragging a cell to the right in the EPG may display columns for later dates. 
     In one embodiment, a date range for the dates included in the EPG may be entered to display events corresponding to the entered date range. A scroll bar may be provided to scroll the EPG to the desired date range. Moreover, a scroll bar may also be provided to scroll the EPG vertically to display additional channels assigned to different users and their respective SNS accounts. In one embodiment, each channel as well as a particular date (e.g., each row or column of the EPG) may be hidden based on a manual designation or based on user preferences or filters (e.g., friend lists). For example, the entire row for channel number 110 corresponding to Miranda may be hidden in the EPG. 
       FIG. 108  is a diagram illustrating an embodiment of a screen in which a content list is displayed on an electronic program guide in accordance with the present disclosure. 
     Referring to  FIG. 108 , the controller  340  may detect a user action for selecting an event cell  10823  of an electronic program guide  10800 . The controller  340  may control display of a content list  10850  associated with the event cell  10823  in response to the detected user action. The content list  10850  may be a list of events associated with the event cell  10823 , or may be a list of content uploaded to the server on a date associated with the event cell  10823 . The server may be the server  10  or the server  20 , and the content may be content uploaded to the server belonging to an account associated with a human channel having a channel number ‘101’. The account may be an SNS account. 
       FIG. 109  is a diagram illustrating an embodiment of a screen on which a preview of content selected from among the content list of  FIG. 108  is displayed. 
     Referring to  FIG. 109 , the controller  340  may detect a user action for selecting a particular item from among items  10911 ,  10913  and  10915  included in a content list  10910  displayed on the electronic program guide  10900 . The controller  340  may control display of a preview  10950  of content indicated by the selected particular item. The preview may be prepared independently of the content, may be a part of the content, or may be the entire content. 
     In one example, if the controller  340  detects a user action for selecting an item  10914 , the controller  340  controls display of a preview of content indicated by the item  10914  in the region  10950  in response to the detected user action. If the controller  340  detects a user action for selecting the region  10950  where the preview will be displayed, the controller  340  may control display of the content indicated by the item  10914  over the entire screen. In this case, the content may overlap over the electronic program guide  10900 , or the electronic program guide  10900  may temporarily disappear from the screen during display of the content. In one embodiment, if the controller  340  detects a prescribed type of selection on an item  10911 ,  10913 ,  10914  (e.g., a double click or selection of a prescribed button on the remote controller), the content may be immediately displayed without displaying a preview of the item in region  10950 . 
       FIG. 110  is a diagram illustrating an embodiment of a screen on which a graphical user interface to produce an event is displayed. 
     Referring to  FIG. 110 , the controller  340  may detect a user action for selecting a cell included in a row associated with a user human channel on an electronic program guide  11000 . The controller  340  may control display of a graphical user interface  11010  to produce an event in response to the detected user action. In one example, an event cell  11024  is located on the same row as a channel cell  11022  indicating a channel number ‘0’, a human channel having the channel number ‘0’ means a human channel of the owner of the electronic device  300 , and the channel cell  11022  further indicates a human address ‘Mike’ and therefore, the owner of the electronic device  300  is Mike. If the controller  340  detects a user action for selecting the event cell  11024 , the controller  340  controls display of the graphical user interface  11010  in response to the user action. 
     The graphical user interface  11010  may include a first region  11011  used to input the title (or subject) of an event, a second region  11013  used to input the date of an event, and a third region  11015  used to input detailed information about an event. 
       FIG. 111  is a diagram illustrating an embodiment of a screen on which an event input into the graphical user interface of  FIG. 110  is displayed. 
     Referring to  FIG. 111 , a first region  11111  of the graphical user interface  11010  receives the title of an event “Match”, a second region  11113  receives the date of the event “12 Mar. 2011”, and a third region  11115  receives detailed information about the event “I am going to watch the India-Aus Match from 3:00 PM. You guys are invited to my place. I have . . . .” 
       FIGS. 112A and 112B  are diagrams illustrating a screen on which an electronic program guide in accordance with the present disclosure, which reflects the event input in  FIG. 111 , is displayed. 
     Referring to  FIG. 112A , if the input of the event illustrated in  FIG. 111  is completed, the controller  340  controls display of at least a part of the event information input in  FIG. 111  on an event cell  11224  associated with the date “12 Mar. 2011” of the electronic program guide  11200 . The event cell  11224  is located on the row indicated by the human channel of the owner ‘Mike’ of the electronic device  300 . 
     If the input of the event illustrated in  FIG. 111  is completed, the controller  340  may control transmission of the event information input in  FIG. 111  to the server  10 , the server  20  and other electronic devices. The controller  340  may detect an SNS account associated with Mike from the human channel map and then, control upload of the event information to the detected SNS account. In addition, the controller  340  may acquire an address of the electronic device transmitted to each human channel of the human channel map and then, control transmission of the event information to the acquired address. 
     As shown in  FIG. 112B , an electronic program guide  11201  is displayed on the electronic device of Molly. The event information input in  FIG. 111  is displayed on an event cell  11234  associated with the date “12 Mar. 2011” at the row indicating the human channel of Mike. The electronic device of Molly may directly receive the event information from the electronic device of Mike, or may indirectly receive the event information through the server  10  or the server  20 . 
       FIG. 113  is a diagram illustrating an implementation procedure of an exemplary embodiment in relation to a method for providing service information in accordance with the present disclosure. 
     Referring to  FIG. 113 , the controller  340  controls display of content of a human channel. The display  302  may display the screen  1500  of  FIG. 15 , the screen  1600  of  FIG. 16 , the screen  1700  of  FIG. 17 , the screen  10000  of  FIG. 100  and the screen  10400  of  FIG. 104 . 
     The controller  340  detects a user action for requesting service information (S 2910 ). 
     The controller  340  constructs service information in response to the detected user action (S 2920 ). The constructed service information may be event information and information associated with the event information and the human channel. The constructed service information may be stored in the storage unit  345 . 
     In some embodiments, Step S 2920  may include an implementation procedure of a method for constructing service information in relation to  FIG. 114 . 
     The controller  340  controls display of the constructed service information (S 2930 ). The display  302  may display the electronic program guide  10100  of  FIG. 101 . The constructed service information may be displayed in the form of the electronic program guide  10100 . 
     In some embodiments, Step S 2930  may include an implementation procedure of a method for displaying service information in relation to  FIG. 115  as described hereinafter. 
     The controller  340  controls production of an event and transmission of the produced event (S 2940 ). 
     In some embodiments, step S 2940  may include an implementation procedure of a method for producing an event in relation to  FIG. 116  as described hereinafter. 
     In some embodiments, Step S 2920  may be performed before Step S 2910 , the service information constructed in Step S 2920  may be stored in the storage unit  345 , and Step S 2930  may be performed after Step S 2910 . In this case, the stored service information may be displayed in Step S 2930 . 
     Step S 2920  may be initially performed, may be performed when an event is additionally produced or received, or may be executed at a predetermined interval. The service information stored in the storage unit  345  may be updated upon execution of Step S 2920 . 
       FIG. 114  is a diagram illustrating an implementation procedure of an exemplary embodiment in relation to a method for constructing service information in accordance with the present disclosure. 
     Referring to  FIG. 114 , the controller  340  controls transmission of an event information request signal to request event information (S 3000 ). The controller  340  may request event information on a per human channel basis or on a per SNS account basis, or may request event information with respect to a human channel included in a human channel map using a single signal. The controller  340  may transmit the event information request signal to at least one of the server  10 , the server  20  or the electronic device. 
     The network interface  320  receives an event signal including the event information in response to the event information request signal (S 3010 ). The event signal may be received from at least one of the server  110 , the server  20  or the electronic device. The event information may include information about at least one event. For example, the event information may include the event  10152  and the event  10123  associated with the channel cell  10122  of Mike in  FIG. 101  and the event  10153  associated with the channel cell  10132  of Miranda. 
     The event information includes an SNS account associated with the event, and may further include at least one of information about the SNS site to which the event has been uploaded, information about the type of the event, the title of the event, the date of the event or detailed information about the event. The event may be an event uploaded to a site including the SNS account. 
     The controller  340  maps the event and the channel number to each other (S 3020 ). By using a channel map including at least one channel number and at least one SNS account assigned to the at least one channel number and also, using an SNS account included in the received event information, the controller  340  may map one of the at least one event or one or more events to one of the at least one channel number. The channel map, which includes at least one channel number and at least one SNS account assigned to the at least one channel number, may be a human channel map, and the human channel map may be the human channel map illustrated in  FIG. 12  or the human channel map illustrated in  FIG. 97 . 
     The controller  340  maps the event to the channel number if the SNS account of the event is equal to the SNS account assigned to the channel number. In one example, the event  10123  and the event  10152  assigned with the channel cell  10122  of Mike in  FIG. 101  may be mapped to the channel number ‘101’, and the event  10153  associated with the channel cell  10132  of Miranda may be mapped to a channel number ‘110’. 
     The controller  340  constructs a guide screen to display the channel numbers and the events mapped to the channel numbers (S 3030 ). The controller  340  may align the channel numbers and the mapped events in the order of dates of the events, or may align the events in the order of the channel numbers mapped to the events. The controller  340  may select and process event information to be displayed on event cells. The event information to be displayed on the event cells may be the titles of the events and may include at least one of icons indicating SNS sites to which the events have been uploaded or event icons. 
       FIG. 115  is a diagram illustrating an implementation procedure of an exemplary embodiment in relation to a method for displaying service information in accordance with the present disclosure. 
     Referring to  FIG. 115 , the controller  340  controls display of en electronic program guide (S 3100 ). The display  302  may display the electronic program guide  10100  of  FIG. 101 . 
     The controller  340  detects a user action for selecting en event cell (S 3105 ). 
     The controller  340  displays detailed information about an event associated with the selected event cell in response to the detected user action (S 3110 ). The display  302  may display the detailed information  10210  of  FIG. 102 . 
     The controller  340  detects a user action for selecting a human cell or a channel cell (S 3115 ). 
     The controller  340  controls display of content of the human channel indicated by the channel number associated with the selected human cell or the selected channel cell in response to the detected user action (S 3120 ). The display  302  may display the content  10400  of  FIG. 104 . 
     The controller  340  detects a user action for selecting a date cell or an event cell (S 3125 ). The user action for selecting the date cell or the event cell may be a down event. 
     The controller  340  detects a user action for dragging the cell selected in Step S 3125  (S 3130 ). The display  302  may display the electronic program guide  10600  of  FIG. 106 . 
     The controller  340  detects a user action for dropping the dragged cell (S 3135 ). The user action for dropping the dragged cell may be an up event. 
     The controller  340  displays the event cell and the date cell, associated with a particular date after a certain time has elapsed, on the electronic program guide in response to the detected user action (S 3140 ). The display  302  may display the electronic program guide  10700  of  FIG. 107 . 
     The controller  340  detects a user action for selecting the event cell associated with the particular date after a certain time has elapsed (S 3145 ). 
     The controller  340  displays a list of content associated with the selected event cell in response to the detected user action (S 3150 ). The display  302  may display the content list  10850  of  FIG. 108 . 
     The controller  340  detects a user action for selecting one of items included in the content list (S 3155 ). 
     The controller  340  controls display of content associated with the selected item (S 3160 ). The controller  340  may display a preview of the content. The content may be displayed over the entire screen, or may be displayed on a certain region on the electronic program guide. In one example, the content may be displayed on the region  10950  of  FIG. 109 . 
       FIG. 116  is a diagram illustrating an implementation procedure of an exemplary embodiment in relation to a method for producing an event in accordance with the present disclosure. 
     Referring to  FIG. 116 , the controller  340  detects a user action for selecting an event cell associated with a channel number indicating a user human channel (S 3200 ). For example, the event cell associated with a channel number indicating a user human channel may be the event cell  11024  of  FIG. 110 . 
     The controller  340  controls display of a graphical user interface to produce an event in response to the detected user action (S 3210 ). The display  302  may display the graphical user interface  11010  of  FIG. 110 . 
     The controller  340  maps the event indicated by the event information input via the graphical user interface to the channel number indicating the user human channel (S 3220 ). 
     The controller  340  transmits the input event information and an SNS account assigned to the user human channel to the server (S 3230 ). The server may be a server including the SNS account or may be the server  10 . If the input event information and the SNS account are transmitted to the server  10 , the server  10  transmits the event information and the SNS account assigned to the user human channel to the SNS site including the SNS account. 
     The controller  340  displays at least a part of the input event information on an event cell that is associated with the mapped channel number and a date included in the input event information (S 3230 ). The display  302  may display the electronic program guide  11200  of  FIGS. 112A and 1128 . 
     Configurations of the electronic device and operating methods thereof in accordance with the present disclosure are not limited to the above described embodiments, and all or a part of the embodiments may be selectively combined to realize various modifications thereof. 
     The present disclosure may be implemented as code that can be written on a computer-readable recording medium and can thus be read by a computer. The computer-readable recording medium includes all types of recording devices in which data is stored in a computer-readable manner. Examples of the computer-readable recording medium include a ROM, a RAM, a CD-ROM, a magnetic tape, a floppy disc, an optical data storage, and a carrier wave (e.g., data transmission through the Internet). The computer-readable recording medium can be distributed over a plurality of computer devices connected through a network so that computer-readable code is written thereto and executed therefrom in a decentralized manner. 
     As is apparent from the above description, with an electronic device, a method of providing a human channel service, a method of constructing a human channel map and a method of relaying a human channel in accordance with the present disclosure, on-line networks between designated individuals can be accomplished using channel numbers. A user can communicate with a designated person by selecting a channel number assigned to the designated person, which assures convenient and easy utilization of a social network service. Further, according to the present disclosure, by allowing the user to acquire an address of an electronic device using a human address independent of an IP address as well as the IP address, the user can utilize the electronic device for a social network service even when the electronic device has a dynamic IP address or a private IP address. Furthermore, according to the present disclosure, the user can conveniently and easily access a social network service anytime and anywhere. Moreover, according to the present disclosure, by allowing a user to access an acquaintance connected to a social network through a human channel, the user and the acquaintance can easily view the same broadcast channel through human channels thereof. 
     The present disclosure provides a chat screen for allowing the user to confirm a friend who is viewing the same content as the user using a human channel map and to chat with the confirmed friend, whereby the user can view a broadcast while chatting with the friend who is viewing the same content. 
     Moreover, according to the present disclosure, as a result of providing a variety of kinds of channel maps and a user interface for assisting channel map switch, the user can easily select a variety of kinds of channel maps. Further, allowing the user to select a variety of kinds of channels listed in a channel map can further facilitate easy user selection of a variety of kinds of channels. 
     The present disclosure provides a menu for the scan of an App service and an SNS service, similar to a broadcast channel scan menu, which can allow the user not only to easily operate a scan menu, but also to easily set an App channel and a human channel based on the result of scan. 
     In addition, the present disclosure provides event information about friends in the form of an Electronic Program Guide (EPG), which can allow the user to easily acquire and manage information about friends, to easily produce a user event and to easily share the produced event with friends. 
     As embodied and broadly described herein, the present disclosure is directed to an electronic device, a method of providing a human channel service, a method of constructing a human channel map and a method of relaying a human channel, a method for inviting to view channel, a method for remotely viewing content at the same time, a method for providing channel map service, a method for providing a channel scan interface and a method for providing service information that substantially obviate one or more problems due to limitations and disadvantages of the related art. 
     One object of the present disclosure is to provide an electronic device, a method of providing a human channel service, a method of constructing a human channel map and a method of relaying a human channel, which enable a user to more conveniently and easily use a social network service. 
     Another object of the present disclosure is to provide an electronic device, a method of providing a human channel service, a method of constructing a human channel map and a method of relaying a human channel, which enable a user to use a social network service anywhere and anytime. 
     Another object of the present disclosure is to provide an electronic device, a method of providing a human channel service, a method of constructing a human channel map and a method of relaying a human channel, which enable a social network service between electronic devices even when the electronic devices have dynamic Internet Protocol (IP) addresses. 
     Another object of the present disclosure is to provide an electronic device, a method of providing a human channel service, a method of constructing a human channel map and a method of relaying a human channel, which enable a social network service between electronic devices even when the electronic devices have private IP addresses. 
     A further object of the present disclosure is to provide an electronic device and a method of making invitation to view a channel, which enable a user to invite an acquaintance connected to a social network to view a broadcast channel that the user is viewing. 
     Another object of the present disclosure is to provide an electronic device, which enables a user to view a broadcast while chatting with a friend who views the same content, and a method for remotely viewing content at the same time. 
     Another object of the present disclosure is to provide an electronic device and a method of providing a channel map service, which provide a variety of kinds of channel maps and enable a user to easily select a variety of kinds of channel maps. 
     A further object of the present disclosure is to provide an electronic device and a method of providing a channel map service, which provide a variety of kinds of channels and enable a user to easily select a variety of kinds of channels. 
     Another object of the present disclosure is to provide an electronic device, which can easily perform a channel scan with respect to various kinds of services and can provide a menu to perform a channel scan with respect to various kinds of services, similar to a conventional broadcast channel scan menu, and a method for providing a channel scan interface. 
     A further object of the present disclosure is to provide an electronic device, which provides information about friends in a social network, and a method for providing service information. 
     To achieve these objects and other advantages and in accordance with the purpose of the invention, as embodied and broadly described herein, a method of providing a human channel service may include detecting a user action for designating a channel number, reading a human address associated with the designated channel number from a human channel map in response to the detected user action, acquiring an address of an electronic device to access based on the read human address, receiving content from the electronic device using the acquired address, and displaying the received content. The human address may include at least one of an e-mail address, an account name, a family name (or surname), a Session Initiation Protocol-Uniform Resource Locator (SIP-URL), or another appropriate type of identifier or address. 
     The address of the electronic device may include at least one of a Media Access Control (MAC) address, an Internet Protocol (IP) address, a port number, a Domain Name System (DNS) name or a Uniform Resource Locator (URL). 
     The acquiring the address of the electronic device may include reading the address of the electronic device based on the human address from a storage unit. 
     The acquiring the address of the electronic device may include transmitting a connection request signal including the human address to a server, and receiving the address of the electronic device from the server. 
     The human channel map may include a channel number, a human address and information associating the channel number and the human address with each other. 
     In one embodiment, a method of constructing a human channel map may include displaying a first Graphical User Interface (GUI) for designation of a human address, detecting a first user action for designating a human address, displaying a second GUI for designation of a channel number in response to the detected first user action, detecting a second user action for designating a channel number, and storing the channel number, the human address and information associating the channel number and the human address with each other in the human channel map in response to the detected second user action. The displayed first GUI may list at least one selectable human address. The displayed second GUI may list a plurality of selectable channel numbers. 
     In this embodiment, the human channel map constructing method may further include receiving the at least one human address from a server. 
     The human channel map constructing may further include displaying a Web page of a Social Network Service (SNS) server, the displayed Web page listing at least one human address, detecting a third user action for selecting one of the listed at least one human address, and displaying the first GUI in response to the detected third user action. 
     In one embodiment, a method of relaying a human channel may include receiving a first registration request signal, including a first human address and an address of a first electronic device, from the first electronic device, storing the first human address and the address of the first electronic device in response to the received first registration request signal, receiving a second registration request signal, including a second human address and an address of a second electronic device, from the second electronic device, storing the second human address and the address of the second electronic device in response to the received second registration request signal, receiving a connection request signal including the second human address from the first electronic device, and transmitting a response signal including the address of the second electronic device to the first electronic device in response to the received connection request signal, and transmitting a response signal including the address of the first electronic device to the second electronic device. 
     In one embodiment, an electronic device may include a controller configured to detect a user action for designating a channel number, read a human address associated with the designated channel number from a human channel map in response to the detected user action, and control acquisition of an address of an electronic device to access, based on the read human address, and a network interface configured to receive content from the electronic device using the acquired address. 
     The electronic device may further include a display configured to display the received content. Moreover, the controller may be configured to control transmitting a connection request signal including the human address to a server, and control receiving the address of the electronic device from the server. 
     In one embodiment, an electronic device may include an interface configured to receive a user action, a controller configured to detect a first user action for designating a human address, control displaying a second GUI for designation of a channel number in response to the detected first user action, detect a second user action for designating a channel number, and control storing the human address, the channel number, and information associating the human address and the channel number with each other in a human channel map in response to the detected second user action, and a storage device configured to store the human channel map. 
     The interface may include at least one of an image capture device, a touch screen, a touch pad, or a remote controller receiver. 
     In one embodiment, a method of constructing a human channel map may include displaying a GUI for setting up a channel, the displayed GUI including a human channel region listing at least one human address and a channel region listing at least one channel number, detecting a first user action for selecting one of the at least one human address, detecting a second user action for dragging the selected human address, detecting a third user action for selecting one of the at least one channel number, and storing the selected human address, the selected channel number, and information associating the channel number and the human address with each other in the human channel map in response to the detected third user action. The displayed GUI may further include a broadcast channel region including at least one broadcast channel and an App channel region including at least one App channel. 
     In this embodiment, the human channel map constructing method may further include confirming whether or not a human address associated with the selected channel number is present in the human channel map, in response to the detected third user action, and deleting the associated human address, the selected channel number and information associating the associated human address and the selected channel number with each other from the human channel map if the associated human address is present. 
     In accordance with another aspect of the present disclosure, a method of making invitation to view a channel includes detecting a first user action for selecting a displayed broadcast program, detecting a second user action for selecting one of at least one channel number included in a displayed human channel map, and transmitting a channel viewing request signal for requesting viewing of the selected broadcast program to an electronic device or a server associated with the selected channel number, in response to the second user action, and the transmitted channel viewing request signal includes at least one of detailed user information, detailed information about a physical channel for transmitting the broadcast program, a service name of the broadcast program, a service Identifier (ID) of the broadcast program, a channel number of the broadcast program, an event name of the broadcast program, a transport stream ID of the broadcast program, a network ID of the broadcast program, information about a service provider providing the broadcast program, information about a transmission medium for transmitting the broadcast program or information about a nation or an area where the service provider is located. The displayed human channel map may further include at least one of a channel name, event name or residual broadcast time of the broadcast program displayed by the electronic device associated with the channel number. 
     The method may further include transmitting a channel guiding signal, including at least one of the channel name, event name or residual broadcast time of the broadcast program, to the electronic device or the server according to an access method associated with the channel number included in the human channel map. 
     The method may further include receiving a channel viewing request signal from the electronic device, and confirming whether or not a broadcast service is receivable from a service provider indicated by information included in the received channel viewing request signal. 
     The method may further include searching for a channel, which broadcasts the broadcast program indicated by information included in the received channel viewing request signal, from stored Electronic Program Guide (EPG) data based on information included in the channel viewing request signal, if reception of the broadcast service from the service provider is not possible. 
     The method may further include receiving a channel viewing request signal from a server, receiving a broadcast program of a channel indicated by information included in the received channel viewing request signal, and displaying the received broadcast program. Information included in the channel viewing request signal may be information obtained as the server amends information included in the channel viewing request signal received from the electronic device according to a difference of at least one of the service provider providing the broadcast service, transmission medium or area. 
     The transmitting the signal to the electronic device may include reading a human address associated with the channel number from a stored human channel map, acquiring an address of the electronic device based on the read human address, and transmitting the channel viewing request signal using the acquired address. The human address may include at least one of an e-mail address, an account name, a family or and a Session Initiation Protocol-Uniform Resource Locator (SIP-URL). The address of the electronic device may include at least one of a Media Access Control (MAC) address, an Internet Protocol (IP) address, a port number, a Domain Name System (DNS) name or a Uniform Resource Locator (URL). 
     In accordance with a further aspect of the present disclosure, an electronic device includes an interface configured to receive a user action, a controller configured to control displaying a broadcast program and a human channel map including at least one channel number, detect a first user action for selecting the broadcast program, detect a second user action for selecting one of the at least one channel number, and control transmitting a channel viewing request signal for requesting viewing of the selected broadcast program to an electronic device or a server associated with the selected channel number in response to the detected second user action, and a network interface configured to output the channel viewing request signal, and the transmitted channel viewing request signal includes at least one of detailed user information, detailed information about a physical channel for transmitting the broadcast program, a service name of the broadcast program, a service Identifier (ID) of the broadcast program, a channel number of the broadcast program, an event name of the broadcast program, a transport stream ID of the broadcast program, a network ID of the broadcast program, information about a service provider providing the broadcast program, information about a transmission medium for transmitting the broadcast program or information about a nation or an area where the service provider is located. The human channel map may further include at least one of a channel name, event name or residual broadcast time of the broadcast program displayed by the electronic device associated with the channel number. 
     The controller may be configured to control transmitting a channel guiding signal, including at least one of the channel name, event name or residual broadcast time of the broadcast program, to the electronic device or the server according to an access method associated with the channel number included in the human channel map. 
     The network interface may be configured to receive a channel viewing request signal from an electronic device, and the controller is configured to confirm whether or not a broadcast service is receivable from a service provider indicated by information included in the received channel viewing request signal. 
     The controller may be configured to search for a channel, which broadcasts the broadcast program indicated by information included in the received channel viewing request signal, from stored Electronic Program Guide (EPG) data based on information included in the channel viewing request signal, if reception of the broadcast service from the service provider is not possible. 
     The network interface may be configured to receive a channel viewing request signal from a server, and the controller may be configured to control receiving a broadcast program of a channel indicated by information included in the received channel viewing request signal. Information included in the channel viewing request signal may be information obtained as the server amends information included in the channel viewing request signal received from the electronic device according to a difference of at least one of the service provider providing the broadcast service, transmission medium or area. 
     The controller may be configured to read a human address associated with the channel number from a stored human channel map, acquire an address of the electronic device based on the read human address, and control transmitting the channel viewing request signal using the acquired address. The human address may include at least one of an e-mail address, an account name, a family name or a Session Initiation Protocol-Uniform Resource Locator (SIP-URL). The address of the electronic device may include at least one of a Media Access Control (MAC) address, an Internet Protocol (IP) address, a port number, a Domain Name System (DNS) name or a Uniform Resource Locator (URL). 
     In accordance with another aspect of the present disclosure, a method for remotely viewing content at the same time includes displaying content, detecting a user action for requesting a simultaneous viewing mode, confirming the presence of an owner who is viewing the displayed content from among owners of human channels included in a human channel map in response to the detected user action, and displaying a silhouette of the confirmed owner. The displayed silhouette may be changed and displayed according to the emotions of the owner. The displayed silhouette may be changed and displayed according to a motion of the owner. The silhouette may be displayed as a 3D image. A chat phrase of the owner may be displayed at a location associated with the silhouette. 
     The method for remotely viewing content at the same time may further include reflecting a screen effect requested by the owner on the displayed content. 
     The confirming the presence of the owner may include transmitting an image frame request signal to request an image frame at a particular time, acquiring the image frame at the particular time from among image frames of the displayed content, receiving an image frame transmission signal including the image frame at the particular time, and comparing the acquired image frame with the image frame included in the received image frame transmission signal so as to confirm the presence of the owner. 
     The confirming the presence of the owner may include transmitting an owner list request signal including information about the content to a server, receiving an owner list from the server, and confirming an owner included in the owner list as the owner who is viewing the displayed content. The information about the content may include at least one of detailed user information, detailed information about a physical channel that transmits the content, a service name of the content, a service ID of the content, a channel number of the content, an event name of the content, a transport stream ID of the content, a network ID of the content, information about a service provider to provide the content, information about transmission media to transmit the content or information about a nation or locale where the service provider is located. 
     The human channel map may include a channel number, a human address and information associating the channel number and the human address with each other. The human address may be an identification mark given to the owner. 
     In accordance with another aspect of the present disclosure, an electronic device includes an interface configured to receive a user action for requesting a simultaneous viewing mode, and a controller configured to confirm the presence of an owner who is viewing content from among owners of human channels included in a human channel map in response to the user action if the user action is detected during display of the content and to control display of a silhouette of the confirmed owner. 
     The controller may control change of the displayed silhouette according to the emotions of the owner and display of the changed silhouette. 
     The controller may control change of the displayed silhouette according to a motion of the owner and display of the changed silhouette. 
     The controller may control display of a chat phrase of the owner at a location associated with the silhouette. 
     The controller may control reflection of a screen effect requested by the owner on the displayed content. 
     The controller may control display of the silhouette as a 3D image. 
     The controller may control transmission of an image frame request signal for requesting an image frame at a particular time, acquiring the image frame at the particular time from among image frames of the displayed content, and if an image frame transmission signal including the image frame at the particular time is received, comparing the acquired image frame with the image frame included in the received image frame transmission signal so as to confirm the presence of the owner. 
     The controller may control transmission of an owner list request signal including information about the content to a server, and if an owner list is received from the server, confirming an owner included in the owner list as the owner who is viewing the displayed content. 
     The information about the content may include at least one of detailed user information, detailed information about a physical channel to transmit the content, a service name of the content, a service ID of the content, a channel number of the content, an event name of the content, a transport stream ID of the content, a network ID of the content, information about a service provider to provide the content, information about a transmission media to transmit the content or information about a nation or locale where the service provider is located. 
     The human channel map may include a channel number, a human address and information associating the channel number and the human address with each other. The human address may be an identification mark given to the owner. 
     In accordance with another aspect of the present disclosure, a method of providing a channel map service includes displaying a first channel map on a screen on which content is being displayed, detecting a first user action for requesting channel map switch, and switching the displayed first channel map to a second channel map, in response to the detected first user action. One of the first channel map and the second channel map is a human channel map including at least one human channel. The first user action may be an action in which a user presses one of directional keys of a remote controller. 
     The switching to the human channel map may include displaying content of one of human channels included in the human channel map. 
     The channel map service providing method may further include detecting a third user action for requesting channel switch in a state in which the human channel map is displayed, switching a selected human channel to another human channel in the human channel map in response to the detected third user action, and displaying content of the switched human channel. 
     The displaying may include reading a human address associated with a channel number of the human channel, acquiring an address of an electronic device to access, based on the read human address, receiving the content from the electronic device using the acquired address, and displaying the received content. 
     The channel map service providing method may further include detecting a second user action for requesting channel map switch, and switching the displayed second channel map to a third channel map in response to the detected second user action. 
     The channel map service providing method may further include detecting a third user action for requesting a full channel map, and displaying a full channel map including the at least one human channel, in response to the detected third user action. 
     The displayed full channel map may further include at least one broadcast channel and at least one App channel. 
     The displayed full channel map may include a sheet on which the at least one human channel is marked, and the sheet is selected by a sheet tab. 
     The full channel map may include sheets on which the at least one broadcast channel and the at least one App channel are marked respectively. 
     The channel map service providing method may further include detecting a third user action for requesting a recently viewed channel map, and displaying a recently viewed channel map including a broadcast channel, a human channel and an App channel displayed within a preset period, in response to the detected third user action. 
     In accordance with another aspect of the present disclosure, a method of providing a channel map service includes detecting a first user action for requesting a channel map, and displaying a channel map including at least one human channel in response to the detected first user action. The channel map may include a connection state mark indicating an online state of an owner of the at least one human channel. The channel map may further include at least one broadcast channel and at least one App channel. 
     The connection state mark may include a first connection state mark indicating a first online state for representing whether or not the owner is online via an electronic device, and a second connection state mark indicating a second online state for representing whether or not the owner is logged in to a server. Information about the first online state may be received from the electronic device or the server. 
     The channel map service providing method may further include transmitting information, indicating that the owner of the human channel is online via the electronic device, to at least one electronic device associated with the at least one human channel or to the server. 
     The transmitting to the electronic device may include reading a human address associated with a channel number from a stored human channel map, acquiring an address of the electronic device based on the read human address, and transmitting information, indicating that the owner is online, using the acquired address. The human address may include at least one of an e-mail address, an account name, a family name or a Session Initiation Protocol-Uniform Resource Locator (SIP-URL). The address of the electronic device may include at least one of a Media Access Control (MAC) address, an Internet Protocol (IP) address, a port number, a Domain Name System (DNS) name or a Uniform Resource Locator (URL). 
     In accordance with a further aspect of the present disclosure, an electronic device includes an interface configured to detect a user action, and a controller configured to control displaying a first channel map on a screen on which content is being displayed, detect a first user action for requesting channel map switch, and switch the displayed first channel map to a second channel map in response to the detected first user action, and one of the first channel map and the second channel map is a human channel map including at least one human channel. 
     In accordance with another aspect of the present disclosure, a method for providing a channel scan interface includes displaying a plurality of menu items to select service types, detecting a user action for selecting one of the plurality of displayed menu items, scanning information to construct a channel of the service type indicated by the selected menu item in response to the detected user action, and displaying the result of scan. One of the service types may be a human channel. The service types may further include at least one of a broadcast channel or an App channel. 
     The scanning may include transmitting a signal to request information about a friend to a server and receiving the information about the friend from the server. The information about the friend may include a single SNS account, or may include one or more SNS accounts. 
     The displaying the result of scan may include displaying the single SNS account, or displaying at least one of the one or more SNS accounts. 
     The method for providing the channel scan interface may further include assigning a first channel number to the single SNS account or to one of the one or more SNS accounts. 
     The method for providing the channel scan interface may further include assigning the first channel number to at least one SNS account among other SNS accounts of a friend associated with the SNS account to which the first channel number has been assigned. 
     The first channel number may be equal to a channel number assigned to another SNS account of the friend associated with the single SNS account. The first channel number may be a channel number assigned to a broadcast channel or an App channel. 
     In accordance with another aspect of the present disclosure, an electronic device includes a controller configured to control display of a plurality of menu items for selecting service types, detect a user action for selecting one of the plurality of displayed menu items, control scan of information to construct a channel of the service type indicated by the selected menu item in response to the detected user action, and a display to display the result of scan. One of the service types may be a human channel. 
     In accordance with another aspect of the present disclosure, a method for providing service information, includes receiving event information including information about at least one event, mapping one of the at least one events or one or more events to one of at least one channel numbers by use of a channel map including the at least one channel number and at least one Social Network Service (SNS) account assigned to the at least one channel number and an SNS account included in the received event information, and displaying one of the at least one channel numbers or one or more channel numbers and at least a part of information about the event mapped to one of the at least one channel numbers or the one or more channel numbers. The event may be uploaded to an SNS site including the SNS account. The event may include at least one of a schedule, a function, a memorial day or content. The event information may include an SNS account associated with the event, and further includes at least one of information about an SNS site to which the event has been uploaded, information about the type of the event, the title of the event, the date of the event or detailed information about the event. The channel map may be a human channel map. At least a part of the displayed information may be the title of the event. The method may further include displaying at least one of an icon indicating an SNS site to which the mapped event has been uploaded or an icon of the mapped event. 
     A broadcast channel may be further assigned to one of the at least one channel numbers or the one or more channel numbers. A plurality of SNS accounts may be assigned to one of the at least one channel numbers or the one or more channel numbers. 
     One of the at least one events or one or more events may be mapped to a channel number, to which an SNS account associated with the event is assigned. 
     One of the at least one channel numbers or the one or more channel numbers and at least a part of the displayed information may be displayed in a calendar form. 
     The calendar form may be configured such that the displayed one channel number or one or more channel numbers are listed in columns, dates are listed in rows, and at least a part of the displayed information is displayed on a corresponding region on the basis of the channel number columns and the date rows. At least a part of information about a plurality of events may be separately displayed on the region. A reminder mark may be further displayed on the region. 
     The method for providing service information may further include detecting a first user action for selecting the region or a region on which the date is displayed, detecting a second user action for dragging the selected region, detecting a third user action for dropping the dragged region, and displaying a particular date after a certain time has elapsed in response to the detected third user action and at least a part of information about an event of the date. 
     The method for providing service information may further include detecting a user action for selecting a region located at a row, containing a region on which a user channel number is displayed, from among a region on which one of the at least one channel numbers or the one or more channel numbers are displayed, and displaying a graphical user interface to produce an event in response to the detected user action. 
     The method for providing service information may further include detecting a user action for selecting a region on which at least a part of information about the mapped event is displayed, and displaying detailed information about the event in response to the detected user action. 
     The method for providing service information may further include detecting a user action for selecting a region on which one of the at least one channel numbers or the one or more channel numbers are displayed, and displaying content of a human channel indicated by the channel number in response to the detected user action. 
     The method for providing service information may further include detecting a user action for selecting a region on which at least a part of information about the mapped event is displayed, and displaying a list of at least one piece of content associated with the event in response to the detected user action. 
     In accordance with a further aspect of the present disclosure, an electronic device includes a network interface configured to receive event information including information about at least one event, a storage unit configured to store at least one channel number and at least one SNS account assigned to the at least one channel number, and a controller configured to map one of the at least one events or one or more events to one of the at least one channel numbers by use of the stored SNS account and an SNS account included in the received event information and to construct a guide screen for displaying one of the at least one channel numbers or the one or more channel numbers and at least a part of information about the event mapped to one of the at least one channel numbers or the one or more channel numbers. 
     Any reference in this specification to “one embodiment,” “an embodiment,” “example embodiment,” etc., means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is submitted that it is within the purview of one skilled in the art to effect such feature, structure, or characteristic in connection with other ones of the embodiments. 
     Although embodiments have been described with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this disclosure. More particularly, various variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure, the drawings and the appended claims. In addition to variations and modifications in the component parts and/or arrangements, alternative uses will also be apparent to those skilled in the art.