# Patent

## Title
Method for play synchronization and device using the same

## Abstract

A method for play synchronization and a device using the same are provided. A first device stores time-based content play information. The first device plays content according to the time-based content play information. The first device transmits the time-based content play information to a second device so that the second device plays the content according to the time-based content play information. Accordingly, the content played by one device can be played by another device concurrently.

## Background
PRIORITY
This application claims priority under 35 U.S.C. §119(a) to Korean Patent Application No. 10-2009-0078326, filed on Aug. 24, 2009, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates generally to a method for play synchronization and a device using the same, and more particularly, to a method for playing contents through a plurality of devices and a device using the same.
2. Description of the Related Art
With the advent of digital devices, users today have a variety of digital devices at their disposal.
Digital devices assist in bringing about convenience and affluence. Digital technology has been developed quickly in recent years, thereby achieving even higher performance and diversity.
However, people continue to seek answers in digital devices of even higher performance and functionality.
There is a limit in the amount of function that a single digital device can provide. Accordingly, digital devices are required to operate in convergence to create a new function that the digital device cannot provide alone.
SUMMARY OF THE INVENTION
The present invention has been made to address at least the above problems and/or disadvantages and to provide at least the advantages described below.
Accordingly, an aspect of the present invention provides a method of play synchronization and a device using the same, according to which devices other than a first device can play the same content as the first device.
According to one aspect of the present invention, a method for play synchronization is provided. A first device stores time-based content play information. The first device plays content according to the time-based content play information. The first device transmits the time-based content play information to a second device so that the second device plays the content according to the time-based content play information.
According to another aspect of the present invention, a play synchronization device is provided for synchronizing content play operation among devices. The play synchronization device includes a storage unit that stores time-based content play information, a content play unit that plays content according to the time-based content play information, and a network interface that transmits the time-based content play information to another device so that the other device plays the content according to the time-based content play information.
According to an additional aspect of the present invention, a play synchronization system is provided for synchronizing content play operation between a first device and a second device. The play synchronization system includes the first device that stores time-based content play information, plays content according to the time-based content play information, and transmits the time-based content play information to the second device so that the second device plays the content according to the time-based content play information. The play synchronization system also includes the second device that synchronizes the time-based content play operation with the first device.



BRIEF DESCRIPTION OF THE DRAWINGS
The above and other aspects, features and advantages of the present invention will be more apparent from the following detailed description when taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a flow diagram illustrating a play synchronization process of electronic frames at remote distances, according to an embodiment of the present invention;
FIG. 2 is a flow diagram illustrating a play synchronization process of electronic frames at remote distances, according to another embodiment of the present invention;
FIG. 3 is a diagram illustrating an example of a timeline, according to an embodiment of the present invention;
FIG. 4 is a diagram illustrating generation of text content using a mobile phone, according to an embodiment of the present invention;
FIG. 5 is a diagram illustrating generation of audio content using a mobile phone, according to an embodiment of the present invention;
FIG. 6 is a detailed block diagram illustrating an electronic frame, according to an embodiment of the present invention; and
FIG. 7 is a detailed block diagram illustrating a mobile phone, according to an embodiment of the present invention.



DETAILED DESCRIPTION OF EMBODIMENTS OF THE PRESENT INVENTION
Embodiments of the present invention are described in detail with reference to the accompanying drawings.
In the following description, the same or similar drawing reference numerals may be used for the same elements even in different drawings. The matters defined in the description, such as detailed construction and elements, are provided to assist in a comprehensive understanding of the present inventive concept. Accordingly, it is apparent that the embodiments of the present invention can be carried out without those specifically defined matters. Also, detailed descriptions of constructions or processes known in the art may be omitted to avoid obscuring the subject matter of the present invention.
Furthermore, in the following description, an electronic frame is exemplified as the device for convenience of explanation. However, it is apparent that the inventive concept is not limited to this specific example, but applicable to various other examples. For example, an electronic book or a Large Format Display (LFD) may be implemented as the device.
1. Play Synchronization of Electronic Frames by Sharing a Manipulation Command
FIG. 1 is a flow diagram illustrating a process of play synchronization of electronic frames at remote distances, according to an embodiment of the present invention. The term ‘play synchronization’ refers to a state in which a plurality of electronic frames play the same content in a real-time basis.
In the specific example explained below, it is assumed that the play synchronization is performed such that all the electronic frames share a manipulation command inputted to one of the electronic frames, as will be explained in greater detail below.
Referring to FIG. 1, if a play synchronization command is inputted to a master electronic frame 110 at step S205, the master electronic frame 110 sets a connection so as to enable communication with a slave electronic device 120 in step S210.
If the connection setting at step S210 is completed, the master electronic frame 110 receives a manipulation command related to content play from a user at step S215.
The manipulation command inputted at step S215 may include: i) a command to play selected content; ii) a command to pause; iii) a command to stop; iv) a command to play the next content; v) a command to play the previous content; and vi) a command to set visual effect in case of a change of content/edit.
The command to play selected content may be directed to play not only one type of content, but also other types of content.
Herein, the phrase ‘to play one type of content’ may include: a) to play photo content only; or b) to play video content only.
Herein, the phrase ‘to play video content only’ may include: b1) to play photo content together with audio content; b2) to play photo content together with text content; b3) to play audio content together with text content; or b4) to play photo content together with audio and text contents.
The term ‘text content’ herein may include: c1) content including a text regarding an additional explanation about photo content; and c2) content including an additional explanation or lyrics of the audio content. The text included in the text content may be generated by the user.
The term ‘audio content’ herein may include: d1) music content; and d2) content including a voice explaining the photo content. In the latter's case, the voice may be generated by the user.
If the manipulation command related to the content play is inputted at step S215, the master electronic frame 110 transmits the inputted manipulation command related to the content play, and content necessary to perform the inputted manipulation command, to the slave electronic frame 120, in step S220.
The content transmitted at step S220 may vary depending on the manipulation command inputted at step S215, which will be explained in greater detail below.
If the manipulation command inputted at step S215 directs to play only one selected content, only one selected content is transmitted at step S220.
If the manipulation command inputted at step S215 directs to play the selected different types of content together, the selected different types of content are transmitted at step S220.
If the manipulation command inputted at step S215 directs to play the next content, the next content is transmitted at step S220.
If the manipulation commands include the command to pause, the command to stop, the command to play the previous content, or the command to set visual effect in case of content change/edit, the manipulation command is transmitted alone at step S220.
If the transmission of the manipulation command and the content is completed between the master electronic frame 110 and the slave electronic frame 120, at step S225, the master electronic frame 110 performs the manipulation command inputted at step S215.
At step S230, during the operation of step S225, the slave electronic frame 120 also performs the manipulation command received at step S220.
Since the master electronic frame 110 and the slave electronic frame 120 play the same content at steps S225 and S230, the operations of the two are in synchronization with each other.
If a user inputs a manipulation command related to the content play to the slave electronic frame 120 during the synchronized content play at step S235, the slave electronic frame 120 transmits the inputted command related to the content play to the master electronic frame 110 in step S240.
If the transmission of the manipulation command between the slave electronic frame 120 and the master electronic frame 110 is completed, at step S245, the slave electronic frame 120 performs the manipulation command inputted at step S235.
During the operation of step S245, the master electronic frame 110 also performs the manipulation command received at step S240, at step S250.
As a result, the master electronic frame 110 and the slave electronic frame 120 are able to bi-directionally synchronize the operation of the content.
If the devices are implemented as electronic books, the devices may synchronize with respect to the text content played by the electronic book, and if the devices are implemented as LFDs, the devices may synchronize with respect to the advertisement content played by the LFD.
2. Play Synchronization of Electronic Frames Through Sharing of a Timeline
FIG. 2 is a flow diagram illustrating the play synchronization of the electronic frames at remote distances, according to another embodiment of the present invention. The play synchronization is exemplified as being performed by the electronic frames in a manner of sharing a timeline, as will be explained in greater detail below.
Referring to FIG. 2, if a user generates a timeline using the master electronic frame 110 at step S305, the master electronic frame 110 stores the generated timeline at step S310.
The term ‘timeline’ refers to a project file related to playing different types of content which have a previously set play order and respective intervals, and also related to content play according to time. FIG. 3 illustrates one example of the timeline, according to an embodiment of the present invention.
The timeline exemplified in FIG. 3 enables playing of photo, audio and text contents in combination. Specifically, the timeline illustrated in FIG. 3 sets the playing in a manner such that,
1) for video effect, photos are played in a sequence of photo-1 (P1)→photo-2 (P2)→photo-3 (P3)→ . . . →photo-100 (P100);
2) for subtitle effect, texts are played in a sequence of text-1 (T1)→text-2 (T2)→text-3 (T3)→ . . . →text-100 (T100) along with the playing of photo-1 (P1)→photo-2 (P2)→photo-3 (P3)→ . . . →photo-100 (P100), respectively; and
3) for audio effect, audios are played in a sequence of audio-2 (A2)→audio-3 (A3)→ . . . →audio-100 (A100) along with the playing of photo-2 (P2)→photo-3 (P3)→ . . . →photo-100 (P100), respectively.
Referring back to FIG. 2, if a user inputs a command to synchronize the play operation using the master electronic frame 110 in step S315, the master electronic frame 110 sets a connection so as to be able to communicate with the slave electronic frame 120 in step S320.
If the connection is set at step S320, the master electronic frame 110 transmits the timeline stored at step S310 and the contents necessary for playing by the timeline to the slave electronic frame 120, at step S325. In one example, if the connection is set at step S320, the master electronic frame 110 may transmit the timeline stored at step S310 and the location information of the contents necessary for playing by the timeline in the master electronic frame 110, to the slave electronic frame 120. As a result, the slave electronic frame 120 is able to play the content according to the location information and the timeline.
If the transmission of the timeline and the contents between the master electronic frame 110 and the slave electronic frame 120 is completed, at step S330, the master electronic frame 110 plays the contents according to the timeline stored at step S310.
During the operation of step S330, the slave electronic frame 120 also plays the contents according to the received timeline, at step S335.
Since the master electronic frame 110 and the slave electronic frame 120 play the contents based on the same timeline at steps S330 and S335, the content play operations are synchronized with each other.
During the synchronized content play operation, the master electronic frame 110 and the slave electronic frame 120 may share the manipulation command at step S340.
In one example, the content play by the manipulation command may be given a higher priority than the content play by the timeline. Additionally, the timeline-based content play operation may resume if a predetermined time lapses from the completion of the command-based content play operation without input of additional manipulation command.
Since the sharing of the manipulation command between the master electronic frame 110 and the slave electronic frame 120 can be easily inferred from FIG. 1, additional explanation is omitted for the sake of brevity.
The slave electronic frame 120 may store the timeline received at step S325. In this case, the slave electronic frame 120 may be able to play the content according to the stored timeline as necessary.
As described above, since the information related to the playing of the content is provided instead of directly providing content to the corresponding devices to synchronize the content play operations of the devices, the contents can be synchronously played in a real-time basis.
3. Generating Text Content Using a Mobile Phone
The text content may be provided for additional explanation about the photo content, and may generated by the user.
The user may input the text content using a text-input keyboard screen displayed on the master electronic frame 110, or through a mobile phone 130 as the one illustrated in FIG. 4.
There is no time limit for generating the text content using the mobile phone 130. Typically, the text content is generated before the content play synchronization, but the text content may also be generated after the content play synchronization starts.
FIG. 4 is a diagram illustrating an example where the text content is generated through the mobile phone 130 after the content play synchronization has begun, according to an embodiment of the present invention. The master electronic frame 110 receives the text content generated through the mobile phone 130, and displays the received text content in a manner overlapping the currently-played photo content.
Additionally, the master electronic frame 110 transmits the text content to the slave electronic frame 120 so that the slave electronic frame 120 also displays the received text content in a manner overlapping the same photo content.
Although the text content is explained as being generated using the mobile phone, this is only for illustrative purposes, and therefore, the same process may be applied to other devices including electronic books, or LFDs.
4. Generating Audio Content Using a Mobile Phone
The audio content may be provided for additional explanation about the photo content, and may be generated by the user.
If the master electronic frame 110 is equipped with a microphone, the user may generate audio content using the microphone. If the master electronic frame 110 has no microphone, the may generate the audio content using the mobile phone 130, as illustrated in FIG. 5.
There is no time limit for generating the audio content using the mobile phone 130. Typically, the audio content would have been generated before the content play synchronization, but it may also be generated after the content play synchronization starts.
FIG. 5 is a diagram illustrating an example where the audio content is generated through the mobile phone 130 after the content play synchronization has begun, according to an embodiment of the present invention. Referring to FIG. 5, the master electronic frame 110 receives the audio content generated through the mobile phone 130, and plays the received audio content along with the currently-played photo content.
Additionally, the master electronic frame 110 transmits the audio content to the slave electronic frame 120 so that the slave electronic frame 120 plays the received audio content together with the same photo content.
Although the audio content is explained as being generated using the mobile phone, this is only for illustrative purposes, and therefore, the same process may be applied to other devices including electronic books, or LFDs.
5. Deleting Content
The operations performed among the devices in response to a command to delete the stored content from the master electronic frame 110, are described below according to an embodiment of the present invention.
If a command to delete the stored content from the master electronic frame 110 is inputted, the master electronic frame 110 deletes the content according to the inputted command, and may transmit the delete command to the slave electronic frame 120 so that the slave electronic frame 120 also deletes the content.
Alternatively, if a command to delete the stored content is inputted to the master electronic frame 110, the master electronic frame 110 may not delete the content, but transmit the command to the slave electronic frame 120 so that the slave electronic frame 120 deletes the corresponding content. In other words, the content may not be deleted from the master electronic frame 110, but from the slave electronic frame 120, when the command to delete the stored content is inputted to the master electronic frame 110.
6. Others
In the examples explained above, the synchronization of content play operations between the master electronic frame 110 and the slave electronic frame 120 are initiated in response to the input of a user's command to start the synchronization. However, this is described only for illustrative purposes, and other examples are possible.
For example, if the user previously sets the slave electronic frame 120 as the synchronization device for the master electronic frame 110 in terms of the content play operation, the two devices may perform synchronization of content play operations without requiring a user's command. Specifically, the user may only need to input ‘manipulation command related with content play’ or ‘command to play according to timeline’ to initiate the synchronization between the master electronic frame 110 and the slave electronic frame 120.
7. Detailed Structure of the Devices
7.1 Electronic Frame
FIG. 6 is a detailed block diagram of the master electronic frame 110 and the slave electronic frame 120, according to an embodiment of the present invention. In the description below, both electronic frames 110, 120 are referred to as the ‘electronic frame’.
Referring to FIG. 6, an electronic frame may include a content play unit 101, a touch screen 102, a control unit 103, a storage unit 104, and a network interface 105.
The content play unit 101 has the main function of the electronic frame, specifically, the playing the stored content from the storage unit 104.
The touch screen 132 may function as a display, i.e., displaying the content played by the content play unit 101 and the Graphical User Interface (GUI), and may function as an input, i.e., receiving a user command inputted in the form of touching.
The storage unit 104 provides a storage space to store the contents received from the external device through the network interface 105 or from the external networks.
The network interface 105 is communicatively connected to the nearby mobile phone 130 and other electronic frames, and may be communicatively connected to an external device that stores content therein or to an external network that provides the contents.
The control unit 103 controls the content play unit 101, the touch screen 102, the storage unit 104, and the network interface 105 to perform the operations illustrated in FIGS. 1 and 2.
7.2 Electronic Books
The structure of a master electronic book and a slave electronic book are described in detail below. Both electronic books are referred to as the ‘electronic book’.
An electronic book may include a content play unit, a touch screen, a control unit, a storage unit, and a network interface.
The content play unit has the main function of the electronic book, specifically, the function of playing the stored text content from the storage unit.
The touch screen may function as a display, i.e., displaying the text content played by the content play unit and the GUI, and may function as an input, i.e., receiving a user command inputted in the form of touching. Additionally, the touch screen of the slave electronic book may display the effect as if the actual book page is flipped over, if the user turns the page of the electronic book, causing the text content on the master electronic book to be turned to the next page.
The storage unit provides a storage space to store the text contents received from the external device through the network interface or from the external networks.
The network interface is communicatively connected to the nearby mobile phone and other electronic books, and may be communicatively connected to an external device that stores text content therein or to an external network that provides the text content.
The control unit controls the content play unit, the touch screen, the storage unit, and the network interface to perform the operations illustrated in FIGS. 1 and 2.
7.3 Large Format Displays (LFDs)
The structure of a master LFD and a slave LFD are described in detail below. Both LFDs are referred to as the ‘LFD’.
An LFD may include a content play unit, a touch screen, a control unit, a storage unit, and a network interface.
The content play unit has the main function of the LFD, specifically, the function of playing the stored advertisement content from the storage unit.
The touch screen may function as a display, i.e., displaying the advertisement content played by the content play unit and the GUI, and may function as an input, i.e., receiving a user command inputted in the form of touching.
The storage unit provides a storage space to store the advertisement contents received from the external device through the network interface or from the external networks.
The network interface is communicatively connected to the nearby mobile phone and other electronic books, and may be communicatively connected to an external device that stores advertisement content therein or to an external network that provides the advertisement content.
The control unit controls the content play unit, the touch screen, the storage unit, and the network interface to perform the operations illustrated in FIGS. 1 and 2.
7.4 Mobile Phones
FIG. 7 is a detailed block diagram of the mobile phone 130, according to an embodiment of the present invention. Referring to FIG. 7, the mobile phone 130 may include a mobile communication unit 131, a touch screen 132, a control unit 133, a storage unit 134, and a network interface 135.
The mobile communication unit 131 has the main and supplementary functions of the mobile phone 130, including functions such as, mobile phone calling, SMS, DMB broadcast reception, or photographing.
The touch screen 132 may function as a display, i.e., the function of displaying the screens necessary for the mobile phone calling or provision of SMS, DMB broadcast, contents, and the GUI, and may also function as an input, i.e., receiving a user command inputted in the form of touching.
The touch screen 132 may display the GUI including a text-input keyboard screen for use in generating the text content to be transmitted to the electronic frame.
The storage unit 134 provides a storage space to store the programs and data necessary for the driving of the mobile phone 130, and contents.
The network interface 135 is communicatively connected to the nearby electronic frame. The network interface 135 transmits the text content and the audio content, generated by the user, to the nearby electronic frames.
The control unit 133 controls the mobile communication unit 131, the touch screen 132, the storage unit 134, and the network interface 135 to perform the operations illustrated in FIGS. 1 and 2.
7.5 Other Devices
Although the electronic frames, mobile phone 130, electronic books, and LFDs are used as examples to explain certain embodiments of the present invention, it is understood that other types of devices can also be implemented.
While the invention has been shown and described with reference to certain embodiments thereof, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

## Claims

1. A method for play synchronization, comprising the steps of:
storing, at a first device, time-based content play information;
playing, at the first device, content according to the stored time-based content play information;
transmitting, from the first device, the time-based content play information to a second device so that the second device plays the content according to the time-based content play information;
when content is inputted from an external device to the first device during the playing at the first device, playing the inputted content along with the currently-played content at the first device; and
transmitting, from the first device, the inputted content to the second device so that the second device plays the inputted content together with the currently-played content.

2. The method of claim 1, further comprising transmitting, from the first device, the content for playing according to the time-based content play information or location information of the content, to the second device.

3. The method of claim 1, further comprising:
when a manipulation command is inputted at the first device, generating, at the first device, the content according to the inputted manipulation command; and
transmitting, from the first device, the manipulation command to the second device so that the second device plays according to the manipulation command.

4. The method of claim 1, wherein the second device performs a content play operation according to the time-based content play information during the playing at the first device.

5. The method of claim 1, further comprising:
when a command to delete the content is inputted at the first device, transmitting, from the first device, the command to delete to the second device so that the second device deletes the content according to the command to delete.

6. The method of claim 5, further comprising, when the command to delete the content is inputted at the first device, deleting the content according to the inputted command to delete at the first device.

7. The method of claim 1, wherein, when the first device and the second device are electronic frames, the content comprises photo content or video content played on the first device and the second device.

8. The method of claim 1, wherein, when the first device and the second device are electronic books, the content comprises text content played on the first device and the second device.

9. The method of claim 1, wherein, when the first device and the second device are Large Format Displays (LFDs), the content comprises advertisement content played on the first device and the second device.

10. A play synchronization device for synchronizing content play operation among devices, comprising:
a storage unit that stores time-based content play information;
a content play unit that plays content according to the time-based content play information; and
a network interface that transmits the time-based content play information to another device so that the other device plays the content according to the time-based content play information, when content is inputted from an external device during the playing at the play synchronization device, plays the inputted content along with the currently-played content at the play synchronization device, and transmits the inputted content to the second device so that a second device plays the inputted content together with the currently-played content.

11. The device of claim 10, wherein the network interface transmits the content for playing according to the time-based content play information or transmits location information of the content, to the other device.

12. A play synchronization system for synchronizing content play operation between a first device and a second device, the play synchronization system comprising:
the first device that stores time-based content play information, plays content according to the time-based content play information, transmits the time-based content play information to the second device so that the second device plays the content according to the time-based content play information, when content is inputted from an external device to the first device during the playing at the first device plays the inputted content along with the currently-played content at the first device, and transmits, from the first device, the inputted content to the second device so that the second device plays the inputted content together with the currently-played content; and
the second device that synchronizes the time-based content play operation with the first device.

13. The system of claim 12, wherein the first device transmits the content for playing according to the time-based content play information or transmits location information of the content, to the second device.