Patent Description:
In recent years, mobile terminals such as mobile phones, Portable Digital Assistants (PDAs) and mobile Personal Computers (PCs) are being widely used and drawing much attention due to improved functionality and performance. Such mobile terminals provide not only calling functionality but also a multimedia functionality such as playing music or movies, message transmitting and receiving functions including text messages and voice messages among other various functions.

Particularly, mobile terminals are capable of providing video call functionality by which a user may send or receive video as well as voice while talking over the phone with a counterpart. During such video call, sufficient and free information sharing is needed.

Prior art document <CIT> discloses a mobile terminal for performing a video call and sharing an edited text file during the video call. Prior art document <CIT> refers to a system and method in a computing environment, wherein a user's annotations are stored together with a user identity and a document identity on a network computer. Prior art document <CIT> discloses to preserve image information for portions of an image obscured by annotations such that the original image can be reconstructed by an editable-annotation-aware application, while the annotated image can be processed by both annotation-aware and annotation-unaware applications. Prior art document <CIT> discloses a hand-free system for performing a video call in a vehicle, wherein the hand-free system is configured to connect to a mobile terminal configured to perform a video call.

Accordingly, the present invention provides a mobile terminal and a control method of a mobile terminal in accordance with the appended claims.

The above and other aspects, features and advantages of certain embodiments of the present invention will become apparent and more readily understood from the following description, taken in conjunction with the accompanying drawings, in which:.

Hereinafter, various embodiments of the present invention will be described in detail with reference to accompanying drawings so as to be easily understood by a person having ordinary skill in the art. In addition, descriptions of well-known functions and parts are omitted for clarity, and like reference numerals refer to like elements throughout.

<FIG> illustrates a mobile terminal according to an embodiment of the present invention. As shown therein, mobile terminals <NUM> and <NUM> are connected in a wireless network and communicate with each other. Mobile terminals <NUM> and <NUM> according to the present embodiment provide a wireless network communication function and may be various devices such as a mobile phone, a mobile PC or a PDA.

Mobile terminals <NUM> and <NUM> also perform a calling function for a telephone call between a caller and a receiver. One of the mobile terminals is a caller terminal and the other one is a receiver terminal. A telephone call which is made by mobile terminals <NUM> and <NUM> includes a video call by which users transmit and receive video and voice during the telephone call. To perform a video call function according to the present embodiment, mobile terminals <NUM> and <NUM> may perform various communications such as Wideband Code Division Multiple Access (W-CDMA), Enhanced Data rates for GSM Evolution (EDGE), Long Term Evolution (LTE), and Worldwide Interoperability for Microwave Access (WiMAX).

As shown in <FIG>, a wireless network according to the embodiment of the present invention may include base station transmission systems <NUM> and <NUM> to transmit and receive wireless communication signals with mobile terminals <NUM> and <NUM>, a base station controller <NUM> to control and manage the plurality of base station transmission systems <NUM> and <NUM>, and a mobile switching center <NUM> to perform a call connection between mobile terminals <NUM> and <NUM> through base station controller <NUM>. Also, as shown in <FIG>, a service server <NUM> is in link with the mobile switching center <NUM> through a network <NUM>, and provides service for the video call between the pair of mobile terminals <NUM> and <NUM>. Network <NUM> may include the Internet.

During a video call, mobile terminals <NUM> and <NUM> according to the embodiment of the present invention enable a caller and a receiver to share a predetermined image (hereinafter, "shared image"). During a video call, mobile terminals <NUM> and <NUM> also enable a caller or a receiver to edit the shared image and share the edited result (hereinafter, "edited information"). Hereinafter, mobile terminals <NUM> and <NUM>, will be described according to the embodiment of the present invention, in more detail with reference to <FIG>.

<FIG> is a block diagram of mobile terminals <NUM> and <NUM> according to the embodiment of the present invention. Even though the pair of mobile terminals <NUM> and <NUM> are separate apparatuses,.

<FIG> illustrates the two mobile terminals <NUM> and <NUM> together for purposes of convenience. It is assumed that, among the pair of mobile terminals <NUM> and <NUM> shown in <FIG>, mobile terminal <NUM> is a caller terminal and mobile terminal <NUM> is a receiver terminal.

As shown therein, the caller mobile terminal <NUM> includes a camera <NUM>, a voice input unit <NUM>, a wireless communication unit <NUM>, a display unit <NUM>, a voice output unit <NUM>, a user input unit <NUM> and a controller <NUM>.

Camera <NUM> captures image and generates photograph and video used for a video call. Camera <NUM> may include an optical unit (not shown) including at least one light-incident lens and an imaging sensor (not shown) converting incident light into electrical data to generate an image. Voice input unit <NUM> may include a voice sensor (not shown) such as a microphone, and receives a voice used for a voice call.

Wireless communication unit <NUM> is connected to a wireless network and communicates with the counterpart mobile terminal <NUM> by a predetermined wireless communication method. During a video call, wireless communication unit <NUM> transmits to the counterpart mobile terminal <NUM> video call data including a video generated by camera <NUM> and a voice input by voice input unit <NUM> and receives video call data including a video and a voice from the counterpart mobile terminal <NUM> according to the control of controller <NUM>.

Display unit <NUM> displays thereon a video, and may include a display panel (not shown) such as a Liquid Crystal Display (LCD) panel. Display unit <NUM> according to the present embodiment displays thereon a video received from the counterpart mobile terminal <NUM> according to the control of controller <NUM> during a video call.

Voice output unit <NUM> outputs a voice, and may include a voice output unit (not shown) such as an internal speaker. Voice output unit <NUM> may further include a connector (not shown) to be connected to an external voice output device (not shown) such as earphones, headsets and external speakers, and may output a voice to the connected external voice output device. Voice output unit <NUM> according to the present embodiment outputs a voice from the counterpart mobile terminal <NUM> according to the control of controller <NUM> during a voice call or a video call.

User input unit <NUM> receives a user's input to manipulate mobile terminal <NUM>. User input unit <NUM> may include a keypad (not shown) including a plurality of keys to input numbers, or characters. The keypad according to the present embodiment may include a touch pad. User input unit <NUM> according to the present embodiment further includes a sensor (not shown) to sense a user's motion or gesture as a user's input on display unit <NUM>. The sensor of user input unit <NUM> includes a touch screen overlapping the display panel of display unit <NUM> such as an LCD panel. Controller <NUM> controls mobile terminal <NUM> as a whole. If a video call function is selected by user input through user input unit <NUM>, controller <NUM> refers to an input telephone number and requests a call connection to the counterpart mobile terminal <NUM> through wireless communication unit <NUM>. If the call connection to the counterpart mobile terminal <NUM> is made, controller <NUM> transmits video call data including a video generated by camera <NUM> and a voice input by voice input unit <NUM> to the counterpart mobile terminal <NUM> through wireless communication unit <NUM>, and controls display unit <NUM> and voice output unit <NUM> to output the video and the voice included in the video call data received from the counterpart mobile terminal <NUM> through wireless communication unit <NUM>, respectively.

Returning to <FIG>, the receiver mobile terminal <NUM> includes a camera <NUM>, a voice input unit <NUM>, a wireless communication unit <NUM>, a display unit <NUM>, a voice output unit <NUM>, a user input unit <NUM> and a controller <NUM>. Camera <NUM>, voice input unit <NUM>, wireless communication unit <NUM>, display unit <NUM>, voice output unit <NUM>, user input unit <NUM> and controller <NUM> of the receiver mobile terminal <NUM>, according to the present embodiment, correspond to camera <NUM>, voice input unit <NUM>, wireless communication unit <NUM>, display unit <NUM>, voice output unit <NUM>, user input unit <NUM> and controller <NUM> of the caller mobile terminal <NUM>, respectively. Hereinafter, unless otherwise stated herein, each element of receiver mobile terminal <NUM> performs the same or similar operations as those corresponding to caller mobile terminal <NUM>.

Wireless communication unit <NUM> of the receiver mobile terminal <NUM> communicates with the counterpart mobile terminal <NUM> as the caller mobile terminal <NUM> through the wireless network. Upon receiving a request for a call connection from the counterpart mobile terminal <NUM>, controller <NUM> of the receiver mobile terminal <NUM> informs a user of the foregoing through voice output unit <NUM>, and initiates a video call according to user input for confirming a call response through user input unit <NUM>. At the time of a video call, controller <NUM> transmits to the counterpart mobile terminal <NUM> a video generated by camera <NUM> and a voice input by voice input unit <NUM> through wireless communication unit <NUM>, and controls display unit <NUM> and voice output unit <NUM> to output a video and a voice received from the counterpart mobile terminal <NUM> through wireless communication unit <NUM>, respectively.

During a video call, mobile terminals <NUM> and <NUM> according to the present embodiment may display a shared image for both users to share such image. Further, mobile terminals <NUM> and <NUM> may edit the shared image, transmit the edited information to the counterpart mobile terminal and share the edited information of the shared image. Hereinafter, operations of mobile terminals <NUM> and <NUM> will be described in more detail with reference to <FIG>.

<FIG> and <FIG> are flowcharts of detailed operations of mobile terminals <NUM> and <NUM> according to the embodiment of the present invention. <FIG>, <FIG>, <FIG>, <FIG> and <FIG> illustrate a shared image and edited information which are displayed by mobile terminals <NUM> and <NUM>, respectively, as shown in <FIG> and <FIG>. Referring to <FIG> and <FIG>, mobile terminals <NUM> and <NUM> transmit and receive video call data including a video and a voice to/from the counterpart mobile terminal and perform a video call in steps <NUM> and <NUM>.

Referring to <FIG>, in step <NUM> controller <NUM> of mobile terminal <NUM> displays on display unit <NUM> a shared image <NUM> together with a video <NUM> of a video call during the video call as shown in <FIG> and <FIG> Controller <NUM> of mobile terminal <NUM> transmits to the counterpart mobile terminal <NUM> the shared image <NUM> displayed on display unit <NUM> together with the video <NUM> of the video call. The counterpart mobile terminal <NUM> may display the shared image together with the video of the video call upon receiving video call data including the shared image from mobile terminal <NUM> during the video call to mobile terminal <NUM>. For example, as in <FIG>, a video <NUM> of a video call and a shared image <NUM> may be displayed on display unit <NUM> of the counterpart mobile terminal <NUM>. Reference numeral <NUM> in <FIG> refers to edited information (to be described later) and is invisible in this step.

At operation <NUM>, sharing an image may be initiated by a user's input through user input unit <NUM>. For example, controller <NUM> of mobile terminal <NUM> may display on display unit <NUM> a menu <NUM> to share the image according to user input, and initiate sharing the image <NUM> of <FIG> and <FIG> according to user selection of menu <NUM> during a video call as shown in <FIG>. Menu <NUM> is displayed for sharing the image and may be displayed as a popup on video <NUM> for the video call. According to the present invention, sharing the image is initiated upon a request from a user of the counterpart mobile terminal <NUM>. Therein, the counterpart mobile terminal <NUM> transmits requested information to mobile terminal <NUM> upon receiving a request for sharing the image from a user of the counterpart mobile terminal <NUM> during a video call. Upon receiving the request for sharing the image from the counterpart mobile terminal <NUM>, mobile terminal <NUM> initiates sharing the image.

Controller <NUM> of mobile terminal <NUM> displays on display unit <NUM> a predetermined shared image <NUM> as shown in <FIG> upon selecting menu <NUM> for sharing the image by a user. Shared image <NUM>, according to the present embodiment, may be various types of images e.g., a photo, a picture or a video, selected by a user and displayed on display unit <NUM>.

Mobile terminal <NUM> according to the present invention further includes a storage unit <NUM>, as shown in <FIG>, which is a non-volatile memory such as a flash memory and stores therein the shared image <NUM>. Controller <NUM> of mobile terminal <NUM> may display on display unit <NUM> a shared image selecting menu (not shown) and allow a user to select the shared image <NUM> stored in storage unit <NUM> upon selecting the image sharing menu <NUM> by a user. The shared image <NUM> may be selected by not only a user of mobile terminal <NUM> but also by a user of the counterpart mobile terminal <NUM>. More specifically, mobile terminal <NUM> transmits to the counterpart mobile terminal <NUM> information of the shared image <NUM> upon receiving a request for selecting the shared image <NUM> from the counterpart mobile terminal <NUM>. A user of the counterpart mobile terminal <NUM> selects an image to be shared based on the information of shared image <NUM>, and transmits to mobile terminal <NUM> a selection result of the shared image <NUM>. Mobile terminal <NUM> displays on display unit <NUM> the shared image <NUM> according to the selection result from the counterpart mobile terminal <NUM>.

As shown in <FIG>, the shared image <NUM> according to the present embodiment is displayed on display unit <NUM> together with the video <NUM> of the video call. Accordingly, a user may directly view the shared image <NUM> during a video call, and may share information more conveniently.

In step <NUM>, controller <NUM> of mobile terminal <NUM> may edit the shared image <NUM> during a video call. The shared image <NUM> according to the present embodiment may be edited by a user's input through user input unit <NUM>, and may be provided as various types relating to the shared image <NUM>. For example, editing the shared image <NUM> includes adding an image indicating a user's gesture for the shared image <NUM> (hereinafter, "gesture image" <NUM>) as shown in <FIG>. Controller <NUM> of mobile terminal <NUM> displays on display unit <NUM> the gesture image <NUM> overlapping the shared image <NUM> through a touch screen of user input unit <NUM> of display unit <NUM> if it is determined that a user's gesture for the shared image is present. The gesture image <NUM> according to the present embodiment is an example of the edited information according to the present invention.

Returning to <FIG>, if the shared image <NUM> is edited in step <NUM>, controller <NUM> of mobile terminal <NUM> transmits to the counterpart mobile terminal <NUM> video call data added with the shared image <NUM> and the edited information <NUM> through wireless communication unit <NUM>.

The method of transmitting to the counterpart mobile terminal the video call data added with the shared image <NUM> and the edited information <NUM> may vary. For example, controller <NUM> of mobile terminal <NUM> may combine the video <NUM> of the video call and the shared image <NUM> to generate combined images <NUM> and <NUM>, and may transmit to the counterpart mobile terminal <NUM> the video <NUM> of the video call and the shared image <NUM> as the combined images <NUM> and <NUM>. Further, controller <NUM> may reflect the edited information to the combined image.

According to another embodiment, controller <NUM> of mobile terminal <NUM> may transmit to the counterpart mobile terminal <NUM> the shared image <NUM> and the edited information <NUM> individually. For example, controller <NUM> may divide blocks of single video call data or provide blocks of a plurality of video call data, and load data of the video <NUM> of the video call, the shared image <NUM> and the edited information to the provided block and transmit such data to the counterpart mobile terminal <NUM>. Controller <NUM> may add identification information to the data of the video <NUM> of the video call, the shared image <NUM> and the edited information <NUM> and have the counterpart mobile terminal <NUM> identify and process the data. The identification information according to the present embodiment may include meta data, which may include information of a format or a source of the video <NUM>.

Referring to <FIG>, in step <NUM>, controller <NUM> of mobile terminal <NUM> receives the video call data including the shared image <NUM> and the edited information <NUM> from the counterpart mobile terminal <NUM> during a video call. For example, controller <NUM> of mobile terminal <NUM> may determine whether the counterpart mobile terminal <NUM> transmits the video <NUM> of the video call, the shared image <NUM> and the edited information <NUM> as a combined image, and control wireless communication unit <NUM> to receive the combined image. Controller <NUM> of mobile terminal <NUM> may confirm the identification information included in the video call data received from the counterpart mobile terminal <NUM>, and control wireless communication unit <NUM> to separately receive the video <NUM> of the video call, the shared image <NUM> and the edited information <NUM> based on the identification information.

As shown in <FIG>, display unit <NUM> of mobile terminal <NUM>, controlled by controller <NUM>, displays the shared image <NUM> reflecting the edited information <NUM>, together with the video <NUM> of the video call, during the video call in step <NUM>. For example, controller <NUM> of mobile terminal <NUM> may receive combined images <NUM>, <NUM> and <NUM> from the counterpart mobile terminal <NUM>, and display such combined images <NUM>, <NUM> and <NUM> on display unit <NUM>. Controller <NUM> of mobile terminal <NUM> may process data of video <NUM> of the video call, the shared image <NUM> and the edited information <NUM> received as individual information, and display on display unit <NUM> the video <NUM> of the video call and the shared image <NUM> reflecting the edited information <NUM>.

As above, the shared image <NUM> and the edited information <NUM> according to the present embodiment are displayed together with the video <NUM> of the video call. Accordingly, a user of mobile terminal <NUM> may immediately receive and view the edited result of the shared image from the counterpart during a video call to the counterpart, and may share more information efficiently.

Referring to step <NUM> in <FIG>, controller <NUM> of mobile terminal <NUM> edits the shared image <NUM> according to user input through user input unit <NUM>, and in step <NUM> transmit to the counterpart mobile terminal <NUM> the edited information <NUM> of <FIG> according to user input. Referring to step <NUM> in <FIG>, controller <NUM> of mobile terminal <NUM> receives edited information <NUM> of the counterpart mobile terminal <NUM>, and displays on display unit <NUM> the shared image <NUM> reflecting the counterpart's edited information <NUM> as shown in <FIG>. Accordingly, both parties to the call may participate in editing the shared image, and share the image more conveniently.

Editing the shared image <NUM> is not limited to the foregoing embodiment, and may vary. For example, enlarging, reducing or rotating the shared image <NUM> or changing color or adjusting at least a part of the shared image <NUM> may fall under editing. Text input by a user may also be added to the shared image <NUM>.

Hereinafter, another embodiment of the present invention will be described with reference to <FIG>, and <FIG>. Referring to <FIG>, mobile terminal <NUM> according to the present embodiment communicates with a display apparatus <NUM> such as a Television (TV). <FIG> is a block diagram of display apparatus <NUM> according to the embodiment of the present invention. As shown therein, display apparatus <NUM> may include a signal receiver <NUM>, a signal processor <NUM>, a display unit <NUM>, a wireless communication unit <NUM>, a user input unit <NUM> and a controller <NUM>. Signal receiver <NUM> receives an image signal. The image signal according to the present embodiment includes a broadcasting signal having a plurality of channels. The broadcasting signal may include a Digital TV (DTV) signal. Signal processor <NUM> processes an image signal received by signal receiver <NUM>. Signal processor <NUM> may demultiplex, decode, enhance or scale the image signal. Display unit <NUM> displays an image thereon based on an image signal processed by signal processor <NUM>. Display unit <NUM> may include a display device (not shown) such as an LCD, a Plasma Display Panel (PDP), or an Organic Light Emitting Diode (OLED). Wireless communication unit <NUM> communicates with mobile terminal <NUM>. Communication between wireless communication unit <NUM> and mobile terminal <NUM> includes a home network communication such as Digital Living Network Alliance (DLNA). Wireless communication unit <NUM> of mobile terminal <NUM> further includes a communication function with respect to wireless communication unit <NUM> of display unit <NUM>. User input unit <NUM> is provided as a remote controller or a manipulation panel, and receives user input. Controller <NUM> controls display apparatus <NUM> as a whole. Display apparatus <NUM> may further include a voice output unit (not shown) to output a voice such as a speaker and a power supply unit (not shown) to supply power.

<FIG> and <FIG> are flowcharts of operations of mobile terminal <NUM> and display apparatus <NUM> according to the present embodiment. <FIG>, <FIG>, <FIG>, <FIG> and <FIG> illustrate a display state of mobile terminal <NUM> and display apparatus <NUM> as shown in <FIG> and <FIG>. Hereinafter, mobile terminal <NUM> according to the present embodiment will be described with reference to <FIG>, and the configuration which is the same or similar to that of mobile terminal <NUM> according to the foregoing embodiment described with reference to <FIG> will be omitted.

Referring to <FIG>, in step <NUM>, controller <NUM> of mobile terminal <NUM> transmits and receives video call data including a video and a voice to/from the counterpart mobile terminal <NUM> and performs a video call. During the video call, in step <NUM>, controller <NUM> of mobile terminal <NUM> receives the video call data including the shared image and the edited information from the counterpart mobile terminal <NUM>. The received shared image <NUM> and the edited information <NUM> may be displayed on display unit <NUM> together with the video <NUM> of the video call as shown in <FIG>.

In step <NUM>, controller <NUM> of mobile terminal <NUM> transmits to display apparatus <NUM> the received shared image <NUM> and the edited information <NUM> through wireless communication unit <NUM> during the video call. As shown in <FIG>, in transmitting the shared image <NUM> and the edited information <NUM> to display apparatus <NUM>, controller <NUM> of mobile terminal <NUM> may display menu <NUM> on display unit <NUM> for transmitting the shared image, have a user select menu <NUM> through user input unit <NUM>, and initiate transmitting the shared image <NUM> and the edited information <NUM>.

In step <NUM> of <FIG>, controller <NUM> of display apparatus <NUM> receives the shared image <NUM> and the edited information <NUM> from mobile terminal <NUM> through wireless communication unit <NUM>. In step <NUM>, controller <NUM> of display apparatus <NUM> displays on display unit <NUM> a shared image <NUM> reflecting edited information <NUM> received from mobile terminal <NUM> as shown in <FIG>. This enables users to share the shared image and the edited information on a screen larger than mobile terminal <NUM>, with better picture quality, also improving the information sharing environment.

In step <NUM> of <FIG>, controller <NUM> of display apparatus <NUM> edits the shared image <NUM> displayed on display unit <NUM> according to user input through user input unit <NUM> such as a remote controller. Editing the shared image <NUM> in display apparatus <NUM> may include, e.g., adding an image <NUM> of a user's gesture with respect to the shared image <NUM> as shown in <FIG>. Image <NUM> is another example of the edited information. The shared image <NUM> may be edited by selecting a key of the remote controller of user input unit <NUM> in display apparatus <NUM> or may be edited by detecting a user's motion or gesture by a motion sensor (not shown) of the remote controller of user input unit <NUM>. In step <NUM> of <FIG>, controller <NUM> of display apparatus <NUM> transmits to mobile terminal <NUM> the edited information <NUM> according to user input through wireless communication unit <NUM>. Only the edited information <NUM> may be transmitted to mobile terminal <NUM> or the shared image <NUM> reflecting the edited information <NUM> may be transmitted. Referring to <FIG>, in step <NUM>, controller <NUM> of mobile terminal <NUM> receives a user's edited information <NUM> with respect to the shared image <NUM> from display apparatus <NUM>. As shown in <FIG>, the received edited information <NUM> may be displayed on display unit <NUM>. Returning to <FIG>, in step <NUM>, controller <NUM> of mobile terminal <NUM> transmits to the counterpart mobile terminal <NUM> the shared image <NUM> and the edited information <NUM> together with the video <NUM> of the video call.

Hereinafter, mobile terminal <NUM> according to another embodiment of the present invention will be described. The configuration of mobile terminal <NUM> which is the same or similar to that of mobile terminal <NUM> according to the foregoing embodiment described with reference to <FIG> will be omitted. According to the present embodiment, it is assumed that a plurality of electronic devices (not shown) which can be connected to mobile terminal <NUM> for communication exists around mobile terminal <NUM>. The electronic device according to the present embodiment includes all of devices which communicate with mobile terminal <NUM> and display an image such as a computer system or a smart phone as well as display apparatus <NUM> described with reference to <FIG>, <FIG>, <FIG> and <FIG>.

During a video call to the counterpart mobile terminal <NUM>, mobile terminal <NUM> selects at least one of a plurality of electronic devices, and transmits the shared image to the selected electronic device. The electronic device displays the shared image transmitted by mobile terminal <NUM>. Mobile terminal <NUM> may transmit to the selected electronic device the edited information of the shared image and/or a video of the video call, together with the shared image, and the electronic device may display the transmitted edited information and/or the video of the video call. Mobile terminal <NUM> may transmit the shared image to at least one of a plurality of electronic devices that a user has selected.

In selecting the electronic device among the plurality of electronic devices to transmit the shared image, etc., a characteristic of each electronic device may be considered. The characteristic of the electronic device according to the present embodiment includes a characteristic of the device itself, the surrounding environment, connectivity, and a supporting codec. Information of the characteristic of the plurality of electronic devices (hereinafter, "device character information") may be transmitted to mobile terminal <NUM> from each electronic device or stored in advance in storage unit <NUM> of mobile terminal <NUM>. Mobile terminal <NUM> refers to the device character information, and selects at least one of a plurality of electronic devices which is determined to be proper for transmitting the shared image.

In selecting the electronic device to transmit the shared image, etc., a characteristic of the shared image may be considered. The characteristic of the shared image according to the present embodiment includes a resolution of an image, data volume, etc. Mobile terminal <NUM> may select at least one of a plurality of electronic devices that corresponds to the characteristic of the shared image to be transmitted. For example, if a resolution of the shared image is high, mobile terminal <NUM> may select an electronic device that has high display resolution among the plurality of electronic devices. As another example, if the data volume of the shared image is large, mobile terminal <NUM> may select an electronic device that has good data processing capability (or processing performance, processing speed) among the plurality of electronic devices.

In selecting the electronic device to transmit the shared image, etc., a characteristic of a user of mobile terminal <NUM> may be considered. The characteristic of a user according to the present embodiment includes age, physical condition, preference and device usage pattern of a user. Information of a user's characteristic (hereinafter, "user character information") may be stored in storage unit <NUM> of mobile terminal <NUM>. The user character information may be set and/or changed by a user of mobile terminal <NUM>. Mobile terminal <NUM> may refer to the user character information and select at least one of a plurality of electronic devices that corresponds to a user's characteristic. For example, if a user is presbyopic, an electronic device having a larger screen may be selected.

Mobile terminal <NUM> may convert the shared image to be consistent with the electronic device which receives such shared image. Mobile terminal <NUM> may convert the shared image in consideration of the device character information of the electronic device. For example, mobile terminal <NUM> may change a resolution or format of the shared image to be consistent with the electronic device that receives such shared image.

Claim 1:
A mobile terminal comprising:
a camera;
a display unit including a display panel and a touch screen overlapping the display panel;
a wireless communication unit;
a non-volatile storage unit storing at least one image for sharing; and
a controller which is configured to:
control the wireless communication unit to perform a video call by transmitting, to a counterpart mobile terminal, video data including video obtained from the camera and by receiving, from the counterpart mobile terminal through the wireless communication unit, video data including counterpart video,
in response to receiving a request for selecting an image for sharing with the counterpart mobile terminal from the counterpart mobile terminal during the video call, transmit information relating to the at least one image to the counterpart mobile terminal through the wireless communication unit for a user of the counterpart mobile terminal to select an image to be shared based on the information relating to the at least one image, and receive a selection result of a shared image from the counterpart mobile terminal,
control the display panel to display a video of the video call and the shared image according to the selection result from the counterpart mobile terminal together during the video call,
control the wireless communication unit to continue performing the video call by transmitting, to the counterpart mobile terminal, video data including video obtained from the camera and the shared image,
in response to obtaining gesture information for the shared image according to a touch input detected by the touch screen, control the display panel to display the shared image reflecting the gesture information together with the video of the video call, and control the wireless communication unit to transmit the gesture information to the counterpart mobile terminal, and
in response to receiving counterpart gesture information for the shared image from the counterpart mobile terminal through the wireless communication unit, control the display panel to display the shared image reflecting the counterpart gesture information together with the video of the video call.