JP2012169739A - Video division reproduction method, video reproduction method, video division reproduction system and video division reproduction program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To display an appropriate divided image in accordance with the arrangement and the number of display devices without increasing a load of a server when the plurality of display devices divisionally display one image.SOLUTION: A master reproduction terminal generates a slave reproduction terminal identifier and sends it to a slave reproduction terminal. The master reproduction terminal transmits selection region information to the slave reproduction terminal at every designated time. The master reproduction terminal and the slave reproduction terminal allocate regions which the respective reproduction terminals take charge of based on the number of divisions, the selection region information and the slave reproduction terminal identifier, generate reproduction region information and generate reproduction region values of the respective terminals based on selection region information and reproduction region information. The master reproduction terminal and the slave reproduction terminal display a part of a content video in synchronizing with the display of the other reproduction terminal based on the reproduction region value.

Description

  The present invention relates to a video division reproduction method, a video reproduction method, a video division reproduction device, and a program for dividing one video and reproducing it on a plurality of terminals.

  In a case where one image is divided and displayed by a plurality of display devices, there are a server device, a display device, and a display method for generating and displaying an appropriate divided image according to the arrangement and number of display devices (for example, Patent Document 1).

JP-A-2005-301131

  In the prior art disclosed in Patent Document 1, a divided image creation process for displaying on each display device is performed based on information received by the server device from each display device. Therefore, there is a problem that the load on the server increases.

  The present invention has been made in consideration of such circumstances, and its object is to display each image without increasing the load on the server when one image is divided and displayed by a plurality of display devices. An object of the present invention is to provide a video division reproduction method, a video reproduction method, a video division reproduction system, and a video division reproduction program capable of displaying an appropriate divided image according to the arrangement and number of apparatuses.

  In view of the above-described problems, a video segmentation playback method according to the present invention includes a distribution server, a master playback terminal, and at least one slave playback terminal that are communicably connected via a network, and the master playback is provided. In a video split playback method in a video split playback system that displays video on a multi-screen configured from a display screen of a terminal and a display screen of the slave playback terminal, the distribution server displays content video to be displayed on the multi-screen. Transmitting the encoded video data and the division number which is the number of the master reproduction terminal and the slave reproduction terminal constituting the multi-screen to the master reproduction terminal and the slave reproduction terminal; The display screen of the slave playback terminal in the multi-screen Transmitting a slave playback terminal identifier representing unique information assigned to each of the slave playback terminals to the corresponding slave playback terminal; and Based on the selection area information indicating the selection area, the slave playback terminal identifier, and the number of divisions, the slave playback area information indicating the area that the slave playback terminal is responsible for display in the multi-screen is generated, and the slave A step of calculating a slave playback area value indicating an area that the slave playback terminal is responsible for display, of the selected areas in the content video of the encoded video data, based on the playback area information and the selection area information; A terminal is connected to the master display Based on the master playback terminal identifier indicating the display position of the playback terminal, the selection area information, and the number of divisions, master playback area information indicating an area that the master playback terminal is responsible for display on the multi-screen is generated, and the master Calculating a master playback area value indicating an area for which the master playback terminal is responsible for display among the selected areas in the content video of the encoded video data based on the playback area information and the selection area information; and Based on the encoded video data, the terminal displays a part of the content video in the area indicated by the master playback area value on its display, and the slave playback terminal synchronizes with the display of the master playback terminal. The content of the area indicated by the slave reproduction area value based on the encoded video data And displaying a part of the video on its own display.

  In the video split reproduction method described above, the master reproduction terminal has information indicating that the first selection area information indicating the selection area of the content video displayed on the multi-screen is changed to different second selection area information. When input, the second selection area information is transmitted to the slave reproduction terminal, and the master reproduction area information is generated based on the second selection area information, the master reproduction terminal identifier, and the division number, and the master reproduction area Calculating the master reproduction area value based on the information and the second selection area information; and when the slave reproduction terminal receives the second selection area information from the master reproduction terminal, the second selection area information, The slave playback area information is generated based on the slave playback terminal identifier and the number of divisions, and the slave playback area information Calculating said slave reproducing area value based on the preliminary second selection region information, characterized in that it comprises a.

  In the video split playback method described above, the encoded video data includes playback time information representing the playback order of the content video by the playback time of the video, and the master playback terminal or the slave playback terminal When a part of the content video is displayed based on the encoded video data, the playback time information corresponding to the encoded video data of the displayed content video is transmitted, and the master playback terminal or other slave playback is transmitted. When the playback time information is received from a terminal, the content video is displayed on the display of each device so as to match the timing indicated by the received playback time information.

  In the above video split playback method, the master playback terminal changes the first selection area information indicating the selection area of the content video displayed on the display to different second selection area information. If the second selection area information is input before the first designated time elapses after the first selection area information is input, the first selection area information is The second selection area information is transmitted to the slave playback terminal after the first specified time has elapsed from the time of transmission, and the second selection area information indicating the selection area of the content video displayed on the display is different from the second selection area information. It is determined whether or not information indicating that the selection area information is to be changed is input, and a second finger longer than the first designated time from the time when the first selection area information is input. If older than time, and transmits the first selection region information after the second specified time from the point of sending the first selection region information to the slave reproduction terminal.

  In view of the above-described problems, a video playback method according to the present invention includes a distribution server that is communicably connected via a network, a main playback terminal including a main display, and a sub-display having a screen size different from that of the main display. In the video playback method in the video playback system including the sub playback terminal, the distribution server transmits the encoded video data of the content video to the main playback terminal and the sub playback terminal, and the main playback terminal A step of inputting selection area information indicating a selection area which is a partial area in the content video, a step of the main playback terminal transmitting the selection area information to the sub-playback, and the main playback terminal, Based on the encoded video data, the selection area information indicates A part of the content video of the area is displayed on the main display, and the sub playback terminal synchronizes with the display of the main playback terminal, and the content of the area indicated by the selection area information based on the encoded video data And displaying a part of the video on the sub-display.

  In view of the above-described problems, a video split reproduction system according to the present invention includes a distribution server, a master reproduction terminal, and at least one slave reproduction terminal that are communicably connected to each other via a network. In a video split playback system that displays video on a multi-screen configured from a display screen of a terminal and a display screen of the slave playback terminal, the distribution server includes encoded video data of content video to be displayed on the multi-screen, A transmission unit that transmits the master playback terminal and the number of divisions that are the number of slave playback terminals that constitute the multi-screen to the master playback terminal and the slave playback terminal; The position of the display of the slave playback terminal on the screen is the slave A transmitter for transmitting a slave playback terminal identifier represented by unique information assigned to each of the live terminals to the corresponding slave playback terminal, and a master indicating the position of the display of the master playback terminal in the master display Based on the playback terminal identifier, the selection area information indicating a selection area that is a partial area in the content video, and the number of divisions, the master playback area information indicating the area that the master playback terminal is responsible for display in the multi-screen is generated. In addition, based on the master reproduction area information and the selection area information, a master reproduction area value indicating an area in which the master reproduction terminal is responsible for display among the selection areas in the content video of the encoded video data is calculated, Based on the encoded video data, the master reproduction area A master decoding unit that displays a part of the content video in the area indicated by the display on its own display, the slave playback terminal based on the selection area information, the slave playback terminal identifier, and the division number, Generating slave playback area information indicating an area in which the slave playback terminal is responsible for display, and based on the slave playback area information and the selection area information, among the selection areas in the content video of the encoded video data, A slave playback area value indicating an area in which the slave playback terminal is responsible for display is calculated, and in synchronization with the display of the master playback terminal, the content video in the area indicated by the slave playback area value is based on the encoded video data. A slave decoding unit that displays a part on its own display. It is a sign.

  In view of the above-described problems, a video segmentation playback program according to the present invention includes a plurality of playback terminals that are communicably connected via a network, and the video is displayed on a multi-screen composed of a display screen of the playback terminal. Encoded video data of content video to be displayed on the multi-screen, selection region information indicating a selection region that is a partial region in the content video, and the multi-screen Receiving a playback terminal identifier that represents the number of divisions that constitutes the playback terminal and the display position of the playback terminal on the multi-screen as unique information assigned to each of the playback terminals; Based on the selection area information, the playback terminal identifier, and the number of divisions, the multi-screen is displayed. Then, reproduction area information indicating an area for which the own reproduction terminal is responsible for display is generated, and the reproduction terminal displays the selected area in the content video of the encoded video data based on the reproduction area information and the selection area information. Calculating a reproduction area value indicating an area in charge of the content, a part of the content video in the area indicated by the reproduction area value based on the encoded video data in synchronization with the display of another reproduction terminal, A video division reproduction program for executing the step of displaying on a display.

  According to the present invention, when one image is divided and displayed by a plurality of display devices, an appropriate divided image is displayed without increasing the load on the server and according to the arrangement and number of display devices. Can do.

It is a block diagram which shows an example of a structure of the video division | segmentation reproduction | regeneration system which concerns on embodiment of this invention. It is a figure which shows an example of the multi screen displayed by the video division | segmentation reproduction | regeneration system which concerns on this embodiment. It is a figure which shows an example of the content image | video which concerns on embodiment of this invention. It is a figure which shows an example of the selection image | video which concerns on embodiment of this invention. It is a figure for demonstrating an example of the multi view reproduction | regeneration file which concerns on embodiment of this invention. It is a figure for demonstrating an example of the reproduction | regeneration setting file which concerns on embodiment of this invention. It is a figure for demonstrating an example of the multi view reproduction | regeneration file table which concerns on embodiment of this invention. It is a figure for demonstrating an example of the encoding video data table which concerns on embodiment of this invention. It is a figure for demonstrating an example of the slave reproduction terminal identification list information which concerns on embodiment of this invention. It is a conceptual diagram for demonstrating the reproduction area information and reproduction area value which concern on embodiment of this invention. It is a conceptual diagram for demonstrating an example of the area | region in charge of reproduction | regeneration in the multiscreen which concerns on embodiment of this invention. It is a sequence diagram for demonstrating the process by the image | video division | segmentation reproduction | regeneration system which concerns on embodiment of this invention. It is a sequence diagram for demonstrating the process by the image | video division | segmentation reproduction | regeneration system which concerns on embodiment of this invention. It is a flowchart for demonstrating an example of the processing flow of the video division | segmentation reproduction | regeneration system which concerns on embodiment of this invention. It is a flowchart for demonstrating an example of the processing flow of the video division | segmentation reproduction | regeneration system which concerns on embodiment of this invention. It is a flowchart for demonstrating an example of the processing flow of the video division | segmentation reproduction | regeneration system which concerns on embodiment of this invention. It is a flowchart for demonstrating an example of the processing flow of the video division | segmentation reproduction | regeneration system which concerns on embodiment of this invention. It is a flowchart for demonstrating an example of the processing flow of the video division | segmentation reproduction | regeneration system which concerns on embodiment of this invention. It is a flowchart for demonstrating an example of the processing flow of the video division | segmentation reproduction | regeneration system which concerns on embodiment of this invention. It is a flowchart for demonstrating an example of the processing flow of the video division | segmentation reproduction | regeneration system which concerns on embodiment of this invention. It is a flowchart for demonstrating an example of the processing flow of the video division | segmentation reproduction | regeneration system which concerns on embodiment of this invention. It is a flowchart for demonstrating an example of the processing flow of the video division | segmentation reproduction | regeneration system which concerns on embodiment of this invention. It is a figure for demonstrating an example of the delivery space | interval of the selection area information which concerns on embodiment of this invention. It is a block diagram which shows an example of a structure of the video division | segmentation reproduction | regeneration system which concerns on 2nd Embodiment of this invention. It is a sequence diagram for demonstrating the process by the video division | segmentation reproduction | regeneration system which concerns on 2nd Embodiment of this invention. It is a sequence diagram for demonstrating the process by the video division | segmentation reproduction | regeneration system which concerns on 2nd Embodiment of this invention.

[First Embodiment]
Hereinafter, an example of a video division reproduction system according to an embodiment of the present invention will be described. FIG. 1 is a block diagram illustrating an example of a configuration of a video division reproduction system according to the present embodiment. FIG. 2 is a diagram illustrating an example of a multi-screen displayed by the video split reproduction system according to the present embodiment. The multi-screen is a single screen formed by combining a plurality of display screens.
The video division reproduction system according to the present embodiment shown in FIG. 1 is a system that displays an arbitrary video on a multi-screen composed of a plurality of displays by controlling the video displayed on each display as shown in FIG. It is. As shown in FIG. 2, the multi-screen includes, for example, the screen of the first display D1 that is a display unit of one master playback terminal, the second display D2 and the third display D3 that are display units of three slave playback terminals. And the screens of the fourth display D4.

The video split reproduction system according to the present embodiment displays, for example, a part of video selected by the user from the content video to be displayed (hereinafter referred to as “selected video”) on the multi-screen. When the selected portion is changed, the changed video is displayed according to the user's operation.
For example, when the content video is a sports video as shown in FIG. 3, the portion designated by the rectangular icon is the selected video. The sports video shown in FIG. 3 is a video of a soccer game, and is a video of a scene where the kicker shoots toward the goal. The video split reproduction system according to the present embodiment displays a video as shown in FIG. 4 (for example, video around the kicker and goalkeeper) on the multi-screen as the selection area.

Hereinafter, an example of the configuration of the video division reproduction system will be described in detail with reference to FIG.
As shown in FIG. 1, the video split playback system according to the present embodiment includes a distribution server 20, a master playback terminal 40, a slave playback terminal 50, a slave playback terminal 60, and a slave playback terminal 70.

  The distribution server 20, the master playback terminal 40, the slave playback terminal 50, the slave playback terminal 60, and the slave playback terminal 70 are communicably connected via the network (A) 30. This network (A) 30 means a network connected over a wide range.

In the present embodiment, the video split playback system includes one master playback terminal 40, and at least one slave playback terminal including three slave playback terminals 50, a slave playback terminal 60, and a slave playback terminal 70. .
The master playback terminal 40 includes a first display D1. The slave playback terminal 50 includes a second display D2. The slave playback terminal 60 includes a third display D3. The slave playback terminal 70 includes a fourth display D4.

The master playback terminal 40 controls (overall control) the slave playback terminal 50, the slave playback terminal 60, and the slave playback terminal 70, and video between the slave playback terminal 50, the slave playback terminal 60, and the slave playback terminal 70 Playback control is performed.
The master playback terminal 40 controls the start and stop of video playback for the slave playback terminal 50, the slave playback terminal 60, and the slave playback terminal 70. The slave playback terminal 50, the slave playback terminal 60, and the slave playback terminal 70 operate according to the control of the master playback terminal 40.
Further, the master playback terminal 40 receives an operation input from the user, generates selection area information indicating the position of the selected video area among the content video areas based on the information indicating the selection area specified by the user, The data is transmitted to the playback terminal 50, the slave playback terminal 60, and the slave playback terminal 70.

  Based on the selection area information generated by the master playback terminal 40, the master playback terminal 40, the slave playback terminal 50, the slave playback terminal 60, and the slave playback terminal 70 generate one encoded video data (for example, selected video), Each display D1 to D4 is divided into areas to be reproduced and reproduced. That is, one encoded video data (for example, selected video) is displayed on the screens of the displays D1 to D4 of the master playback terminal 40, the first slave playback terminal 50, the second slave playback terminal 60, and the third slave playback terminal 70. Display on the configured multi-screen. Note that at the start of reproduction (that is, at the first reproduction from the initial state), the selected image is displayed on the multi-screen using the initial position indicated by the selection area information described in advance in the reproduction setting file.

Next, the configuration of the distribution server 20 will be described in detail.
Distribution server 20 includes a reception unit 21, a reproduction data storage unit 22, a transmission unit 23, and a server control unit 24.
The receiving unit 21 receives a request signal from each of the master playback terminal 40, the slave playback terminal 50, the slave playback terminal 60, and the slave playback terminal 70 via the wide area network (A) 30, and receives the received request signal. Output to the server control unit 24.
The server control unit 24 reads the data corresponding to the request signal based on the request signal input from the reception unit 21 with reference to the reproduction data storage unit 22 and outputs the data to the transmission unit 23.

The reproduction data storage unit 22 stores a multi-view reproduction file, a reproduction setting file, encoded video data, a multi-view reproduction file table, and an encoded video data table.
An example of the multi-view playback file is shown in FIG. For example, as shown in FIG. 5, the multi-view playback file is a text in which a content URL indicating the location where the encoded video data is stored and a division number (vertical and horizontal) of the playback video on the multi-screen It is a file. In addition, the number of divisions (vertical and horizontal) of the reproduced video is, in other words, information indicating the arrangement of the master reproduction terminal 40, the slave reproduction terminal 50, the slave reproduction terminal 60, and the slave reproduction terminal 70 that form a multi-screen. .
In the example shown in the figure, the content URL (location where the encoded video data exists “rtsp: //XXX.XXX.XXX/encoded video data”), the number of vertical divisions (the number of vertical divisions of the selected area, the example shown in the figure) "2"), the number of horizontal divisions (the number of horizontal divisions of the selected region, "2" in the illustrated example) is described.

  An example of the playback setting file is shown in FIG. In the reproduction setting file, for example, as shown in FIG. 6, selection area information used as initial values, the resolution of the main video, and the resolution of the navigation video are described. The initial value of the selection area information is predetermined as information indicating a selection area that is a partial area in the content video selected by the user.

  The encoded video data is obtained by encoding the content video, and includes two pieces of navigation encoded video data for reproducing the entire video and main encoded video data for reproducing the selected area. The navigation encoded video data and the main encoded video data are encoded data of the same content video, and are different in that the resolution is different. The main encoded video data is a video having a higher resolution than the navigation encoded video data. In the present embodiment, the resolution of navigation encoded video data is 200 × 400 = 80,000 pixels, and the resolution of main encoded video data is 2000 × 4000 = 8 million pixels. The navigation encoded video data and the main encoded video data are stored in the reproduction data storage unit 22 as one encoded video data.

An example of the multi-view playback file table is shown in FIG. For example, as shown in FIG. 7, this multi-view playback table is a table that associates a multi-view playback file URL indicating the location of a multi-view playback file with a multi-view playback file.
An example of the encoded video data table is shown in FIG. For example, as shown in FIG. 8, the encoded video data table is a table that associates a content URL indicating the location of the encoded video data, the encoded video data, and a reproduction setting file.
The multi-view playback file table and the encoded video data table are determined in advance by an administrator, a user, or the like.

  The transmission unit 23 transmits the data read from the reproduction data storage unit 22 by the server control unit 24 via the network (A) 30 to the master reproduction terminal 40, the slave reproduction terminal 50, the slave reproduction terminal 60, and the slave reproduction. Transmit to terminal 70.

The master reproduction terminal 40 includes a reproduction request unit 41, a synchronous reproduction control unit 42, a transmission unit 43, a reception unit 44, a decoding unit 45, a display unit 46, and a master storage unit 47.
The reproduction request unit 41 inputs the multi-view reproduction file URL and outputs it to the synchronous reproduction control unit 42. The reproduction request unit 41 is, for example, an input unit that receives an operation input from the user, and receives information on a multi-view reproduction file URL indicating the location of the content video specified by the user.

The master storage unit 47 is slave reproduction, which is information that associates the IP addresses of all the slave reproduction terminals 50, 60, and 70 connected to the distribution server 20 via the network (A) 30, the slave reproduction terminals, and the terminal identifiers. Holds terminal identification list information.
FIG. 9 is a diagram illustrating an example of slave reproduction terminal identification list information.
The slave playback terminal identification list information is assigned to the IP address previously assigned to the slave playback terminal 50, the slave playback terminal 60, and the slave playback terminal 70, and to the slave playback terminal 50, the slave playback terminal 60, and the slave playback terminal 70. Information associated with the slave playback terminal identifier.
The master storage unit 47 holds a list of IP addresses of slave playback terminals as shown in FIG. 9 and assigns them in order from the top of the IP address list to the slave playback terminal 50, slave playback terminal 60, and slave playback terminal 70, and slave playback. For example, “1” is assigned to the slave playback terminal 50, “2” is assigned to the slave playback terminal 60, and “3” is assigned to the slave playback terminal 70 in order from the top.
The synchronized playback control unit 42 performs request control from the playback request unit 41, the reception unit 44, and the decoding unit 45, and request control to the reception unit 44, the decoding unit 45, and the transmission unit 43.

The master playback terminal 40 establishes a TCP / IP connection with all the slave playback terminals 50, 60, 70 via the network (B) 31. This includes at least a slave playback terminal identifier, a multi-view playback file URL, a playback preparation notification signal, a playback start notification signal, and information indicating the playback time at each specified time, respectively, as slave playback terminal 50, slave Used for transmission to the playback terminal 60 and the slave playback terminal 70.
The slave playback terminal 50, the slave playback terminal 60, and the slave playback terminal 70 are used to receive and return a reception start notification signal, a playback preparation completion notification signal, a playback start execution notification signal, and information from the master playback terminal 40.

Also, the master playback terminal 40 transmits the selected area information to each slave playback terminal 50, 60, 70 via the network (B) 31 by UDP (User Datagram Protocol) multicast (may be UDP broadcast). To do.
The UDP broadcast is a transmission method for sending a message to everyone on the network. UDP multicast is a transmission method for sending a message to a specific group on a network. TCP is a transmission method that reliably delivers a message to the other party. UDP is a transmission method that has a high transfer rate but is not guaranteed to reach the other party reliably.
The network B means a network within a limited range used in a specific building or site such as a home LAN (Local Area Network) or an in-house LAN.

The transmission unit 43 of the master playback terminal 40 receives the request signal from the synchronous playback control unit 42, and sends it to the distribution server 20, or the slave playback terminal 50, the slave playback terminal 60, and the slave playback terminal 70 according to the request content. , Send a request signal.
More specifically, the transmission unit 43 transmits a multi-view playback file and an encoded video data distribution request signal to the distribution server 20 via the network (A) 30. Further, the transmission unit 43 sends at least the slave playback terminal identifier, the multi-view playback file URL, the playback preparation for the slave playback terminal 50, the slave playback terminal 60, and the slave playback terminal 70 via the network (B) 31. A notification, a reproduction start notification, and information indicating the reproduction time at that time are transmitted by TCP / IP. Moreover, the transmission part 43 transmits selection area information by UDP multicast (UDP broadcast may be sufficient) for every designated time.

  The receiving unit 44 receives data from the distribution server 20, the slave playback terminal 50, the slave playback terminal 60, or the slave playback terminal 70, and outputs the data to the decoding unit 45 when the received data is encoded video data. In other cases, the data is output to the synchronous reproduction control unit 42.

The decoding unit 45 receives the encoded video data from the receiving unit 44, and decodes the navigation encoded video data and the main encoded video data included in the received encoded video data in parallel in units of 1 GOP (Group Of Picture). To do.
The decoding unit 45 may decode the navigation encoded video data only when the navigation video is displayed on the multi-screen. When the decoding unit 45 does not decode the navigation encoded video data, the navigation video described below and the video thumbnail video assigned to each terminal are not displayed on the multi-screen.

Note that 1 GOP is generally 15 frames and 0.5 seconds, but it is not always necessary. The decoding unit 45 creates reproduction area information indicating the position of the video in the selection area to be reproduced by the slave reproduction terminal 50, the slave reproduction terminal 60, and the slave reproduction terminal 70 from the selection area information and the number of divisions. A playback area value is created from the playback area information.
In decoding the main encoded video data, the decoding unit 45 decodes the main encoded video data based on the selection region information and the master playback region information, and further, converts the master playback region video based on the master playback region value. Cut out from main encoded video data. Further, the decoding unit 45 sends the decoded navigation video and master reproduction area video to the display unit 46.

  The display unit 46 receives the decoded navigation video and the master playback area video from the decoding unit 45, and performs playback. The display unit 46 corresponds to the first display D1 in the multi-screen. In this embodiment, only the master reproduction area video is displayed on the entire surface in accordance with the screen size of the first display D1. The display unit 46 may display a navigation video superimposed on the master playback area video at a predetermined position.

The decoding unit 45 cuts out the playback area video of each terminal from the navigation video decoded by the decoding unit 45 based on the selection area information and the playback area value, and further thumbnails them.
The display unit 46 receives the playback area video of each playback terminal that has been converted into thumbnails and performs playback.

Next, the configuration of the slave playback terminal 50, the slave playback terminal 60, and the slave playback terminal 70 will be described.
Since the slave playback terminal 50, the slave playback terminal 60, and the slave playback terminal 70 have the same configuration, the slave playback terminal 50 will be described as an example, and other slave playback terminals are representatively described here. The description of 60 and the slave playback terminal 70 is omitted.

The slave playback terminal 50 includes a synchronized playback control unit 52, a transmission unit 53, a reception unit 54, a decoding unit 55, a display unit 56, and a slave storage unit 57. In this embodiment, there are three slave playback terminals, but the number is not limited to three.
The synchronized playback control unit 52 performs request control from the receiving unit 54 and the decoding unit 55 and request control to the receiving unit 54, the decoding unit 55, and the transmission unit 53.
The transmission unit 53 receives the request signal from the synchronous reproduction control unit 52 and transmits the request signal to the distribution server 20 or the master reproduction terminal 40 according to the request content. The transmission unit 53 transmits a multi-view playback file distribution request and an encoded video data distribution request signal to the distribution server 20 via the network (A) 30. On the other hand, the transmission unit 53 sends a reception start notification, a reproduction preparation completion notification, a reproduction start execution notification, and an information reception reply from the master reproduction terminal 40 to the master reproduction terminal 40 via the network (B) 31. Use TCP / IP.

  The receiving unit 54 receives data from the distribution server 20 and the master reproduction terminal 40 and outputs the data to the synchronous reproduction control unit 52. The receiving unit 54 receives information indicating the playback time for each designated time from the master playback terminal 40 via the network (B) 31, the slave playback terminal identifier, the multi-view playback file URL, the playback preparation notification, the playback start notification, Receive selection area information for each specified time.

The decoding unit 55 receives the encoded video data from the receiving unit 54 and decodes the navigation encoded video data and the main encoded video data included in the received encoded video data in parallel in units of 1 GOP.
In some cases, the navigation encoded video data is not necessarily decoded. When the navigation encoded video data is not decoded, it is assumed that there is no navigation video described below and video thumbnail video in charge of each terminal.
Note that 1 GOP is generally 15 frames and 0.5 seconds, but it is not always necessary. The decoding unit 55 creates reproduction area information to be reproduced by each reproduction terminal from the selection area information and the number of divisions, and creates a reproduction area value from the selection area information and the reproduction area information.

The main encoded video data is decoded based on the selection area information and the reproduction area information of the slave reproduction terminal 50 (60, 70), and further, the reproduction area value of the slave reproduction terminal 50 (60, 70). Based on, the playback area video is cut out.
Further, the decoding unit 55 sends the decoded navigation video and the playback area video of the slave playback terminal 50 (60, 70) to the display unit 56. The display unit 56 receives the decoded navigation video from the decoding unit 55 and the playback area video of the slave playback terminal 50 (60, 70) and plays back.
The decoding unit 55 cuts out the playback area video of each terminal from the navigation video decoded by the decoding unit 55 based on the selection area information and the playback area value, and further thumbnails them.
The display unit 46 receives the playback area video of each playback terminal that has been converted into thumbnails and performs playback.

Next, playback area information and playback area values will be described.
FIG. 10 is a conceptual diagram for explaining reproduction area information and reproduction area values according to the present embodiment.
FIG. 11 is a conceptual diagram for explaining an example of a playback charge area on a multi-screen.
In the present embodiment, on the multi-view screen, areas of the screen displayed by the master playback terminal 40, the slave playback terminal 50, the slave playback terminal 60, and the slave playback terminal 70 (hereinafter referred to as a multi-screen playback charge area) It is determined in advance based on the number of divisions described in the multiview playback file.

For example, as shown in FIG. 11, the upper left corner area of the multi-screen is a multi-screen playback area that is always assigned to the master playback terminal 40. The other areas in the multi-screen are allocated as playback areas of the slave playback terminals based on the playback terminal identifiers, for example, in ascending order of the number of identifiers according to the raster scan order.
In the present embodiment, the multi-screen playback area in the upper right of the multi-screen divided into four equal parts is assumed to be the slave playback terminal 50 with the identifier “1”. The multi-screen playback area at the lower left of the multi-screen divided into four equal parts is set as the slave playback terminal 60 with the identifier “2”. The multi-screen playback area in the lower right of the multi-screen divided into four equal parts is assumed to be the slave playback terminal 70 with the identifier “3”.

  As shown in FIG. 10, the main video and the navigation video are the same content video having different resolutions. This content video is, for example, a sports video as shown in FIG. The main video and the navigation video are designated with a selection area indicating the same part of the content video. This selection area is an image of the kicker and goalkeeper as shown in FIG.

  An image corresponding to the selected area in the main video is referred to as a selected area image S1, and an image corresponding to the selected area in the navigation video is referred to as a selected area image S2. In the selected area image S1 in the main video, the upper left divided image area R11 is the first display reproduction area R11, the upper right divided image area is the second display reproduction area R12, and the lower left area is divided into four. This image area is referred to as a third display reproduction responsible area R13, and the quadranted lower right image area is referred to as a fourth display reproduction responsible area R14. Similarly, in the selected area image S2, the upper left divided image area is the first display reproduction responsible area R21, the upper right divided image area is the second display reproduction responsible area R22, and the lower left divided quadrant is divided. The image area is referred to as a third display reproduction responsible area R23, and the lower right divided image area is referred to as a fourth display reproduction responsible area R24. The first to fourth display reproduction responsible areas R11 to R14 correspond to the master reproduction terminal 40, the slave reproduction terminal 50, the slave reproduction terminal 60, and the slave reproduction terminal 70, respectively. The first to fourth display playback areas R21 to R24 are areas for displaying videos displayed on the master playback terminal 40, the slave playback terminal 50, the slave playback terminal 60, and the slave playback terminal 70, respectively. The images corresponding to the first to fourth display reproduction responsible regions R21 to R24 are not actually generated by dividing the navigation video, but the navigation video selection region image S2 is virtually divided for convenience of explanation. It is defined as the original.

As described above, in this embodiment, the resolution of the navigation video is 400 × 200 = 80,000 pixels. In this navigation video, the selection area information (X, Y, width, height) indicating the selection area S2 is, for example, (30, 70, 260, 100). X and Y are coordinates indicating a reference position serving as a reference. In the present embodiment, the coordinates (X + width, Y + height) obtained by adding the width to X and adding the height to Y of the reference position P (X, Y) are the coordinates P ′ on the diagonal line of the reference position. . Therefore, (X, Y, width, height) indicates a rectangular area defined by the reference position P and the coordinate P ′ on the diagonal line.
In the navigation video, the selection area S2 indicated by the selection area information (30, 70, 260, 100) is displayed at a predetermined position on the screen of the playback terminal set to display the navigation video.
As described above, the resolution of the main video is 2000 × 4000 = 8 million pixels. Selection area information (X, Y, width, height) indicating the selection area S1 in the main video is (300, 700, 2600, 1000).
In the present embodiment, the selection area information is described as indicating the selection area by coordinates in the main video or navigation video, but the present invention is not limited to this, and relative coordinates in the main video and the entire navigation video are described. May be shown. For example, a relative coordinate value (0.075, 0.35, 0) representing a selection area represented by (X, Y, width, height) = (300, 700, 2600, 1000) in the main video in relative coordinates. .65, 0.5). In addition, a relative coordinate value (0.075, 0.35, 0) representing a selection area represented by (X, Y, width, height) = (30, 70, 260, 100) in the navigation image in relative coordinates. .65, 0.5).

In the present embodiment, the reproduction area value indicating the first display reproduction responsible area R11 corresponding to the master reproduction terminal 40 is (300, 700, 1300, 500). The reproduction area value indicating the second display reproduction area R12 corresponding to the slave reproduction terminal 50 is (1600, 700, 1300, 500). The reproduction area value indicating the third display reproduction area R13 corresponding to the slave reproduction terminal 60 is (300, 1200, 1300, 500). The reproduction area value indicating the fourth display reproduction responsible area R14 corresponding to the slave reproduction terminal 70 is (1600, 1200, 1300, 500).
In the main video, images obtained by dividing the selection area S1 indicated by the selection area information (300, 700, 2600, 1000) into four equal parts are master reproduction terminals 40 corresponding to the first to fourth display reproduction responsible areas R11 to R14, Displayed on the slave playback terminal 50, the slave playback terminal 60, and the slave playback terminal 70.

Next, an example of decoding of each display reproduction area will be described.
As shown in FIG. 10, in this embodiment, the main video and the navigation video are each divided into 10 pieces, and the division number = 10. Further, the main video and the navigation video are each divided in an arrangement in which five divided videos are arranged in the upper stage and five divided videos in the lower stage. Each divided video is assigned a video number for identifying the other divided video. For example, “0” is assigned to the upper left divided video of the main video and navigation video, and “9” is assigned to the lower right divided video. “1” to “8” are assigned to the other divided videos in ascending order so that the numbers increase from left to right.

The number of divisions is not limited to 10 shown in FIG. Further, the identification of the divided places is not limited to numbers.
In the example shown in FIG. 10, the selection area image S1 or the selection area image S2 has video numbers = “0”, “1”, “2”, “3”, “5”, “6”, “7”, respectively. , “8” part of the divided image is included. That is, the areas corresponding to the video numbers = “4” and “9” are divided videos that do not include the selected area image S1 and the selected area image S2.
For example, the master playback terminal 40 has video numbers corresponding to the playback area portion of the master playback terminal 40 out of the main video based on the playback area information of the master playback terminal 40, “0”, “1”, “5”, Based on the playback area value of the master playback terminal 40, the master playback terminal 40 is decoded from the video numbers “0”, “1”, “5”, and “6” based on the playback area value of the master playback terminal 40. The main image is reproduced by cutting out the portion indicated by the reproduction area value.
The slave playback terminal 50 decodes “1”, “2”, “3”, “6”, “7”, “8” based on the playback area information of the slave playback terminal 50, and further Based on the playback area value, that portion is cut out and the main video is played back.
The master playback terminal 40 cuts out the playback area video of each playback terminal from the navigation video based on the playback area value as a thumbnail video, further converts it to a thumbnail, and plays it as a thumbnail video for each playback terminal.

12 and 13 are sequence diagrams for explaining the processing by the video division reproduction system according to the present embodiment. Specifically, it is a sequence diagram for explaining a process from a distribution request to a reproduction start process, a user operation selection area divided reproduction process, and a reproduction stop.
The sequence shown in FIG. 12 will be described below.
1. The master playback terminal 40 is TCP / IP connected to all the slave playback terminals 50, the slave playback terminal 60, and the slave playback terminal 70. The master playback terminal 40 transmits a unique slave playback terminal identifier to all of the slave playback terminals 50, the slave playback terminal 60, and the slave playback terminal 70. In this embodiment, the master playback terminal 40 has a slave playback terminal identifier “001” for the slave playback terminal 50, a slave playback terminal identifier “002” for the slave playback terminal 60, and a slave playback terminal identifier “003” for the slave playback terminal 70. ", Respectively. Then, the slave playback terminal 50, the slave playback terminal 60, and the slave playback terminal 70 each store the received slave playback terminal identifier in the storage unit.

2. The master playback terminal 40 sends a multi-view playback file distribution request to the distribution server 20. The master playback terminal 40 receives the multi-view playback file from the distribution server 20.
3. The master playback terminal 40 sends the content URL described in the multi-view playback file to the distribution server 20. The master playback terminal 40 receives the encoded video data corresponding to the content URL and the playback setting file from the distribution server 20 and stores them in the master storage unit 47. Here, the reproduction start of the encoded video data of the master reproduction terminal 40 is not yet executed. Note that the master playback terminal 40 starts receiving encoded video data, but avoids a situation where the reception buffer overflows by performing distribution control from the remaining reception buffer. The distribution server 20 distributes the encoded video data as a stream to the master playback terminal 40.

4). The master playback terminal 40 transmits the multi-view playback file URL to all the slave playback terminals 50, the slave playback terminals 60, and the slave playback terminals 70.
5. The slave playback terminal 50, slave playback terminal 60, and slave playback terminal 70 send a multi-view playback file distribution request to the distribution server 20. Then, the slave playback terminal 50, the slave playback terminal 60, and the slave playback terminal 70 receive the multi-view playback file from the distribution server 20.

  6). Slave playback terminal 50, slave playback terminal 60, and slave playback terminal 70 send the content URL described in the multi-view playback file to the distribution server. The slave playback terminal 50, the slave playback terminal 60, and the slave playback terminal 70 receive the encoded video data corresponding to the content URL and the playback setting file from the distribution server 20, and store them in the slave storage unit 57. Here, the reproduction start of the encoded video data of the slave reproduction terminal 50, the slave reproduction terminal 60, and the slave reproduction terminal 70 is not yet executed. The slave playback terminal 50, the slave playback terminal 60, and the slave playback terminal 70 start receiving the encoded video data, but avoid the situation where the reception buffer overflows by performing distribution control from the remaining reception buffer. ing. The distribution server 20 distributes the encoded video data as a stream to the slave reproduction terminal 50, the slave reproduction terminal 60, and the slave reproduction terminal 70.

7). The slave playback terminal 50, the slave playback terminal 60, and the slave playback terminal 70 transmit a reception start notification to the master playback terminal 40.
8). When receiving the reception start notification from all the slave playback terminals 50, the slave playback terminals 60, and the slave playback terminal 70, the master playback terminal 40 outputs the encoded video data from the reception unit 44 to the 1 GOP decoding unit 45. Further, the master reproduction terminal 40 outputs the reproduction setting file read from the master storage unit 47 to the decoding unit 45.
9. Then, the master playback terminal 40 notifies all slave playback terminals 50, slave playback terminals 60, and slave playback terminals 70 of playback preparation.

  10. When the slave playback terminal 50, the slave playback terminal 60, and the slave playback terminal 70 receive the playback preparation from the master playback terminal 40, the slave playback terminal 50, the slave playback terminal 60, and the slave playback terminal 70 output the encoded video data from the reception unit 54 to the 1 GOP decoding unit 55. In addition, the slave playback terminal 50, the slave playback terminal 60, and the slave playback terminal 70 output the playback setting file read from the slave storage unit 57 to the decoding unit 55.

11. The slave playback terminal 50, the slave playback terminal 60, and the slave playback terminal 70 notify the master playback terminal 40 that playback preparation is complete.
12 When the master playback terminal 40 receives the completion of playback preparation from all the slave playback terminals 50, slave playback terminals 60, and slave playback terminals 70, the master playback terminal 40 receives all of the slave playback terminals 50, slave playback terminals 60, and slave playback terminals 70. To start playback.

13. When the slave playback terminal 50, the slave playback terminal 60, and the slave playback terminal 70 receive the playback start, each decoding unit 55 determines the number of divisions and initial selection area information described in the playback setting file, and the playback terminal identifier. Based on the above, the reproduction area information indicating the reproduction responsible area corresponding to each slave reproduction terminal 50, slave reproduction terminal 60, and slave reproduction terminal 70 is created. The slave playback terminal 50, the slave playback terminal 60, and the slave playback terminal 70 are responsible for playback corresponding to each slave playback terminal 50, slave playback terminal 60, and slave playback terminal 70 based on the initial selection area information and playback area information. A playback area value indicating the area is created, and based on the playback area value, the second display playback charge area R22 and the third display playback charge corresponding to each of the slave playback terminal 50, the slave playback terminal 60, or the slave playback terminal 70 It is also possible to start playback of images corresponding to the area R23 and the fourth display playback charge area R24 and start playback of the navigation video.
Further, the slave playback terminal 50, the slave playback terminal 60, and the slave playback terminal 70 are based on the initial selection area information, the playback area information, and the playback area value. Playback of thumbnails of the playback terminal 60 and the slave playback terminal 70) may be started.

14 The slave playback terminal 50, the slave playback terminal 60, and the slave playback terminal 70 notify the master playback terminal 40 of playback start execution.
15. When the master reproduction terminal 40 receives the reproduction start execution from all the slave reproduction terminals 50, the slave reproduction terminals 60, and the slave reproduction terminals 70, the decoding unit 45 determines the number of divisions and the initial selection area described in the reproduction setting file. Based on the information and the playback terminal identifier, playback area information is created. Then, the master reproduction terminal 40 creates a reproduction area value based on the initial selection area information and the reproduction area information. The master playback terminal 40 starts playback of the image corresponding to the first display playback area corresponding to the master playback terminal 40 based on the playback area value. Further, the master playback terminal 40 may start playback of the navigation video.
Furthermore, the master playback terminal 40 is configured to select all playback terminals (master playback terminal 40, slave playback terminal 50, slave playback terminal 60, and slave playback terminal 70) based on the initial selection area information, playback area information, and playback area value. Playback of the thumbnails may be started.

Next, the sequence shown in FIG. 13 will be described below.
Here, the user instructs the master playback terminal 40 to change the selection area.
16. The master playback terminal 40 creates a new playback area value indicating the first display playback charge area R11 after the selection area change based on the new selection area information indicating the position of the selection area after the change specified by the user and the playback area information. To do.
Based on the new playback area value, the master playback terminal 40 starts playback of the image corresponding to the first display playback area R11 after the selection area has been changed. Further, the master playback terminal 40 may start playback of the navigation video.
Furthermore, the master playback terminal 40 is based on the new selection area information, the playback area information, and the new playback area value, and all playback terminals (master playback terminal 40, slave playback terminal 50, slave playback terminal 60, and slave playback terminal 70). Play thumbnails.

17. The master reproduction terminal 40 transmits the new selection area information to all the slave reproduction terminals 50, the slave reproduction terminals 60, and the slave reproduction terminals 70 every designated time.
18. The slave playback terminal 50, the slave playback terminal 60, and the slave playback terminal 70 receive selection area information from the master playback terminal 40. Then, a new reproduction area value is created based on the received new selection area information and reproduction area information. The playback area of the slave playback terminal is played back based on the new playback area value. Play the navigation video. Furthermore, playback of thumbnails of all playback terminals is started based on the received selection area information, playback area information, and new playback area value.

19. The master playback terminal 40 checks the playback time for each specified time. The master playback terminal 40 transmits information indicating playback time (hereinafter referred to as playback time information) to all the slave playback terminals 50, slave playback terminals 60, and slave playback terminals 70. The reproduction time information is information representing the order of reproducing the content video by the video reproduction time.
20. The slave playback terminal 50, the slave playback terminal 60, and the slave playback terminal 70 match the playback time of the content video displayed by the slave playback terminal 50, the slave playback terminal 60, and the playback time indicated by the received playback time information of the master playback terminal.
21. When the master reproduction terminal 40 executes the reproduction stop, the master reproduction terminal 40 notifies all the slave reproduction terminals 50, the slave reproduction terminals 60, and the slave reproduction terminals 70 of the reproduction stop.
22. All slave playback terminals 50, slave playback terminals 60, and slave playback terminals 70 receive the playback stop.
23. The master reproduction terminal 40 transmits a distribution stop to the distribution server 20.
24. The master playback terminal 40 stops playback.
25. The slave playback terminal 50, the slave playback terminal 60, and the slave playback terminal 70 transmit a distribution stop to the distribution server 20.
26. Slave playback terminal 50, slave playback terminal 60, and slave playback terminal 70 stop playback.

  Note that when the video split playback system according to the present embodiment receives the playback start notification from the master playback terminal 40, the slave playback terminal 50, the slave playback terminal 60, and the slave playback terminal 70 each play back the encoded data. The playback start execution notification signal is transmitted to the master playback terminal 40. When the master reproduction terminal 40 receives reproduction start execution notification signals from all the slave reproduction terminals 50, the slave reproduction terminals 60, and the slave reproduction terminals 70, the master reproduction terminal 40 starts reproducing the encoded data. Thereafter, the master playback terminal 40 transmits playback time information to each slave playback terminal 50, slave playback terminal 60, and slave playback terminal 70 at specified times. The slave playback terminal 50, slave playback terminal 60, and slave playback terminal 70, based on the received playback time information, the playback timing of the video displayed on the master playback terminal 40, the slave playback terminal 50, the slave playback terminal 60, and The reproduction timing of the video displayed on each of the slave reproduction terminals 70 is synchronized. Thereby, the shift | offset | difference of the image | video displayed on the multiscreen comprised by the master reproduction | regeneration terminal 40, the slave reproduction | regeneration terminal 50, the slave reproduction | regeneration terminal 60, and the slave reproduction | regeneration terminal 70 can be reduced.

Here, the designated time indicates the length of encoded data to be decoded in each of the master playback terminal 40, the slave playback terminal 50, the slave playback terminal 60, and the slave playback terminal 70, and is determined in advance. It has been. The reproduction time represents the reproduction order in the encoded file by the time indicating the video length. For example, for a video of unit time divided every 100 msec, the playback time is information indicating the order of arrangement of the video per unit time. Therefore, the video per unit time having the same information indicated by the playback period indicates the same video or video to be played at the same timing.
In addition, the video split reproduction system according to the present embodiment displays a navigation video in synchronization with the main video. Also in this case, similarly to the case of synchronizing the images displayed on the respective displays D1 to D4, the reproduction timing of the images is adjusted for each designated time based on the reproduction time information.
In the sequence shown in FIG. 13, only the master playback terminal 40 transmits the playback time information to the slave playback terminal 50, the slave playback terminal 60, and the slave playback terminal 70. Is not limited to this. That is, any one of the slave playback terminal 50, the slave playback terminal 60, and the slave playback terminal 70 generates playback time information corresponding to the encoded video data that has been played back at the master playback terminal 40 or another slave playback terminal at a specified time. 50, the slave reproduction terminal 60, and the slave reproduction terminal 70 may be transmitted.

Next, an example of the processing flow of the video division reproduction system according to the present embodiment will be described with reference to FIGS.
Hereinafter, only the slave playback terminal 50 will be described as the slave playback terminal. However, the present invention may be configured to include a plurality of slave playback terminals as described above, and the other slave playback terminals 60 and 70 perform the same operation as the slave playback terminal 50. Only the reference numerals are shown in parentheses, and detailed description is omitted.

14 to 22 are flowcharts for explaining an example of the video division reproduction method by the video division reproduction system according to the present embodiment.
First, an example of a video division reproduction method according to the present embodiment will be described with reference to FIG.
The synchronous playback control unit 42 of the master playback terminal 40 refers to the slave playback terminal identification list information stored in the master storage unit 47, and via the slave playback terminals 50 (60, 70) and the network (B) 31. TCP / IP (Transmission Control Protocol / Internet Protocol) connection. This slave playback terminal identification table is set in advance.

Next, the synchronous playback control unit 42 of the master playback terminal 40 identifies each slave playback terminal 50 (60, 70) with respect to all the slave playback terminals 50 (60, 70) connected via TCP / IP. Information indicating the slave playback terminal identifier is transmitted. That is, the synchronized playback control unit 42 refers to the slave playback terminal identification list information and based on the IP address previously assigned to the slave playback terminal 50 (60, 70), the IP address in the slave playback terminal identification list information The playback terminal identifier associated with the address is transmitted to the slave playback terminal 50 (60, 70).
Each of the slave playback terminals 50 (60, 70) receives the slave playback terminal identifier corresponding to the IP address assigned to it, and stores it in the slave storage unit 57 (step 701).

Here, when information indicating the multi-view playback file URL is input by the user to the playback request unit 41, the playback request unit 41 sends the information indicating the input multi-view playback file URL to the synchronous playback control unit 42. (Step 702).
The synchronous playback control unit 42 receives the information indicating the multi-view playback file URL input from the playback request unit 41, saves the received information indicating the multi-view playback file URL in the master storage unit 47, and the multi-view playback file Information indicating the URL is output to the transmitter 43 (step 703).
Then, the transmission unit 43 receives information indicating the multi-view playback file URL from the synchronous playback control unit 42, and receives a multi-view playback file delivery request signal for requesting delivery of the multi-view playback file indicated by the received multi-view playback file URL. Then, it is transmitted to the distribution server 20 via the network (A) 30 (step 704).

The receiving unit 21 of the distribution server 20 receives the multi-view reproduction file distribution request signal from the master reproduction terminal 40 via the network (A) 30 and outputs it to the server control unit 24 (step 705).
The server control unit 24 receives the multi-view playback file delivery request signal from the receiving unit 21, refers to the multi-view playback file table of the playback data storage unit 22, and displays the multi-view playback file indicated by the received multi-view playback file delivery request signal The multi-view playback file corresponding to the file URL is read from the playback data storage unit 22 and output to the transmission unit 23 (step 706).
The transmission unit 23 receives the multi-view playback file from the server control unit 24, and transmits the received multi-view playback file to the master playback terminal 40 via the network (A) 30 (step 707).

The receiving unit 44 of the master playback terminal 40 receives the multi-view playback file from the distribution server 20 via the network (A) 30 and outputs it to the synchronized playback control unit 42 (step 708).
When the synchronized playback control unit 42 receives the multi-view playback file from the receiving unit 44, the synchronized playback control unit 42 sends an encoded video data distribution request signal for requesting distribution of the encoded video data of the content URL described in the multi-view playback file. While outputting to the transmission part 43, the received multi view reproduction file is preserve | saved at the master memory | storage part 45 (step 709).
The transmission unit 43 receives the encoded video data distribution request signal from the synchronous reproduction control unit 42, and transmits the received encoded video data distribution request signal to the distribution server 20 via the network (A) 30 (step 710). .

Next, with reference to FIG. 15, a continuation of the video divided reproduction method according to the present embodiment will be described.
The receiving unit 21 of the distribution server 20 receives the encoded video data distribution request signal from the master playback terminal 40 via the network (A) 30 and outputs the received encoded video data distribution request signal to the server control unit 24. (Step 711).
Next, the server control unit 24 receives the encoded video data distribution request signal from the receiving unit 21, refers to the encoded video data table of the reproduction data storage unit 22, and the content URL indicated by the encoded video data distribution request signal Are read from the reproduction data storage unit 22 and output to the transmission unit 23.

The transmission unit 23 of the distribution server 20 receives the reproduction setting file input from the server control unit 24, and transmits the received reproduction setting file to the master reproduction terminal 40 via the network (A) 30 (step 712).
In addition, the server control unit 24 reads the encoded video data corresponding to the content URL indicated by the encoded video data distribution request signal from the reproduction data storage unit 22 with reference to the encoded video data table of the reproduction data storage unit 22. And output to the transmitter 23. The transmitting unit 23 receives the encoded video data transmitted from the server control unit 24, and transmits the received encoded video data to the master reproduction terminal 40 via the network (A) 30 (step 713).

When receiving the reproduction setting file and the encoded video data transmitted from the transmission unit 23 of the distribution server 20 via the network (A) 30, the reception unit 44 of the master reproduction terminal 40 transmits the reproduction setting file and the encoded video data to the synchronous reproduction control unit 42. Output. The synchronized playback control unit 42 stores the playback setting file in the master storage unit 47. Further, when receiving the reproduction setting file and the encoded video data, the receiving unit 44 generates an encoded video data reception start notification signal indicating that the encoded video data has been received, and outputs it to the synchronous playback control unit 42 ( Step 714).
Note that the master reproduction terminal 40 does not yet start the reproduction process of the encoded video data at this stage. Since the receiving unit 44 performs distribution control from the remaining buffer capacity, the receiving buffer does not overflow.

When the synchronized playback control unit 42 receives the encoded video data reception start notification signal and the playback setting file from the receiving unit 44, the slave playback terminal 50 (60, 70) uses the same multi-view playback file URL as in step 702. Notify That is, the synchronous playback control unit 42 reads out the master view playback file URL stored in the master storage unit 47 and outputs information indicating the master view playback file URL to the transmission unit 43 (step 715).
The transmission unit 43 receives the information indicating the same multi-view reproduction file URL as in step 702 from the synchronous reproduction control unit 42, and transmits the received information indicating the multi-view reproduction file URL to all the information via the network (B) 31. The data is transmitted to the slave playback terminal 50 (60, 70) (step 716).

The receiving unit 54 of the slave playback terminal 50 (60, 70) receives information indicating the multi-view playback file URL from the master playback terminal 40 via the network (B) 31, and receives the information indicating the multi-view playback file URL. It outputs to the synchronous reproduction | regeneration control part 52 (step 717).
The synchronous playback control unit 52 of the slave playback terminal 50 (60, 70) receives information indicating the multiview playback file URL from the receiving unit 54, and stores the information indicating the multiview playback file URL in the slave storage unit 57. At the same time, information indicating the URL of the multi-view playback file is output to the transmission unit 53 (step 718).
The transmission unit 53 of the slave playback terminal 50 (60, 70) receives information indicating the multi-view playback file URL from the synchronous playback control unit 52, and requests the delivery of the multi-view playback file indicated by the multi-view playback file URL. A view reproduction file distribution request signal is sent to the distribution server 20 via the network (A) 30 (step 719).

Next, with reference to FIG. 16, a continuation of the video divided reproduction method according to the present embodiment will be described.
The receiving unit 21 of the distribution server 20 receives the multi-view playback file distribution request signal from the slave playback terminal 50 (60, 70) via the network (A) 30, and outputs it to the server control unit 24 (step 720). .
The server control unit 24 receives the multi-view playback file delivery request signal from the receiving unit 21, refers to the multi-view playback file table of the playback data storage unit 22, and displays the multi-view playback file indicated by the received multi-view playback file delivery request signal The requested number of multi-view reproduction files corresponding to the file URL are read from the reproduction data storage unit 22 and output to the transmission unit 23 (step 721).
The transmission unit 23 receives the requested number of multi-view playback files from the server control unit 24, and transmits the received multi-view playback files to the slave playback terminal 50 (60, 70) via the network (A) 30. (Step 722).

Then, the receiving unit 54 of the slave playback terminal 50 (60, 70) receives the multi-view playback file from the distribution server 20 via the network (A) 30, and outputs it to the synchronized playback control unit 52 (step 723). .
Next, when the synchronized playback control unit 52 of the slave playback terminal 50 (60, 70) receives the multi-view playback file from the receiving unit 54, the synchronized playback control unit 52 of the content URL described in the multi-view playback file The encoded video data distribution request signal for requesting distribution is output to the transmission unit 53 and the received multi-view reproduction file is stored in the slave storage unit 57 (step 724).
The transmission unit 53 receives the encoded video data distribution request signal from the synchronous reproduction control unit 52, and transmits the received encoded video data distribution request signal to the distribution server 20 via the network (A) 30 (step 725). ).

The receiving unit 21 of the distribution server 20 receives the encoded video data distribution request signal from the slave playback terminal 50 (60, 70) via the network (A) 30, and receives the received encoded video data distribution request signal as a server. It outputs to the control part 24 (step 726).
The server control unit 24 receives the encoded video data distribution request signal from the reception unit 21, refers to the encoded video data table of the reproduction data storage unit 22, and corresponds to the content URL indicated by the encoded video data distribution request signal. The requested number of encoded video data reproduction setting files are read from the reproduction data storage unit 22 and output to the transmission unit 23. The transmission unit 23 receives the requested number of reproduction setting files output from the server control unit 24 and receives the received reproduction setting files via the network (A) 30 as slave reproduction terminals 50 (60, 70). (Step 727).

  Next, the server control unit 24 refers to the encoded video data table of the reproduction data storage unit 22 and requests the encoded video data corresponding to the content URL indicated by the encoded video data distribution request signal from the reproduction data storage unit 22. The same number is read and output to the transmitter 23. The transmission unit 23 receives the requested number of encoded video data from the server control unit 24, and transmits the received encoded video data to the slave playback terminal 50 (60, 70) via the network (A) 30. (Step 728).

Next, with reference to FIG. 17, a continuation of the video division reproduction method according to the present embodiment will be described.
When the reception unit 54 of the slave reproduction terminal 50 (60, 70) receives the reproduction setting file and the encoded video data transmitted from the transmission unit 23 of the distribution server 20 via the network (A) 30, the reproduction setting file Is output to the synchronous reproduction control unit 52. The synchronized playback control unit 52 stores the playback setting file in the slave storage unit 57. Further, when receiving the reproduction setting file and the encoded video data, the receiving unit 54 generates an encoded video data reception start notification signal indicating that the encoded video data has been received, and outputs it to the synchronous playback control unit 52 ( Step 729).
Note that the slave playback terminal 50 (60, 70) does not start the playback process of the encoded video data at this stage. In the slave playback terminal 50 (60, 70), the receiving unit 54 performs distribution control from the remaining buffer capacity, so that the reception buffer does not overflow.

Next, the synchronous playback control unit 52 of the slave playback terminal 50 (60, 70) receives the encoded video data reception start notification signal from the reception unit 54, and transmits the received encoded video data reception start notification signal to the transmission unit 53. (Step 730).
The transmission unit 53 receives the encoded video data reception start notification signal from the synchronous reproduction control unit 52, and transmits the received encoded video data reception start notification signal to the master reproduction terminal 40 via the network (B) 31. (Step 731).

The receiving unit 44 of the master playback terminal 40 receives the encoded video data reception start notification signal from the slave playback terminal 50 (60, 70) via the network (B) 31, and receives the received encoded video data reception start notification signal. Is output to the synchronous reproduction control unit 42 (step 732).
The synchronized playback control unit 42 receives the encoded video data reception start notification signal of the slave playback terminal 50 (60, 70) from the receiving unit 44. The synchronized playback control unit 42 determines whether or not encoded video data reception start notification signals have been received from all the slave playback terminals 50 (60, 70). When the encoded video data reception start notification signal is received from all the slave playback terminals 50 (60, 70), the synchronous playback control unit 42 receives a signal for transmitting only 1 GOP of the encoded video data to the decoding unit 45. Send to. The receiving unit 44 outputs the encoded video data 1GOP to the decoding unit 45.
At this time, the decoding unit 45 temporarily stores the input encoded video data 1GOP in its own storage unit without decoding it yet.
When the synchronized playback control unit 42 receives the encoded video data reception start notification signal from all the slave playback terminals 50 (60, 70), it reads the playback setting file from the master storage unit 47 and sends it to the decoding unit 45. The reproduction setting file is output and a reproduction preparation notification signal is output to the transmission unit 43 (step 733).
The transmission unit 43 of the master reproduction terminal 40 receives a reproduction preparation notification signal to be transmitted to each slave reproduction terminal 50 (60, 70) from the synchronous reproduction control unit 42, and to each slave reproduction terminal 50 (60, 70). Then, a reproduction preparation notification signal is transmitted via the network (B) 31 (step 734).

When receiving the reproduction preparation notification signal from the master reproduction terminal 40 via the network (B) 31, the reception unit 54 of the slave reproduction terminal 50 (60, 70) outputs the received reproduction preparation notification signal to the synchronous reproduction control unit 52. (Step 735).
When the synchronized playback control unit 52 receives the playback preparation notification signal, the synchronized playback control unit 52 sends a signal for transmitting only 1 GOP of the encoded video data to the decoding unit 55 to the receiving unit 54. The receiving unit 54 outputs the encoded video data 1GOP to the decoding unit 55. At this time, the decoding unit 55 temporarily stores the input encoded video data 1GOP in its own storage unit without decoding it yet.
The synchronized playback control unit 52 reads out the playback setting file from the slave storage unit 57, outputs it to the decoding unit 55, and indicates that the preparation for playback of the encoded video data in the slave playback terminal 50 (60, 70) has been completed. A reproduction preparation completion notification signal is output to the transmission unit 53. (Step 736).

Next, with reference to FIG. 18, a continuation of the video division reproduction method according to the present embodiment will be described.
The transmitting unit 53 receives the reproduction preparation completion notification signal from the synchronous reproduction control unit 52, and transmits the reproduction preparation completion notification signal to the master reproduction terminal 40 via the network (B) 31 (step 737).
When receiving the reproduction preparation completion notification signal from the slave reproduction terminal 50 (60, 70) via the network (B) 31, the reception unit 44 of the master reproduction terminal 40 performs synchronous reproduction control on the received reproduction preparation completion notification signal. The data is output to the unit 42 (step 738). The synchronous reproduction control unit 42 receives the reproduction preparation completion notification signal from the reception unit 44 and determines whether or not the reproduction preparation completion notification signal has been received from all the slave reproduction terminals 50, 60, 70. When the playback preparation completion notification signal is received from all the slave playback terminals 50, 60, 70, the synchronized playback control unit 42 sends an instruction to send the playback start notification signal to all the slave playback terminals 50, 60, 70. (Step 739).
When receiving the reproduction start notification signal from the synchronous reproduction control unit 42, the transmission unit 43 of the master reproduction terminal 40 transmits the reproduction start notification signal to all the slave reproduction terminals 50, 60, 70 via the network (B) 31. (Step 740).

In the slave playback terminal 50 (60, 70), when the receiving unit 54 receives the playback start notification signal from the master playback terminal 40 via the network (B) 31, the received playback start notification signal is sent to the synchronous playback control unit 52. (Step 741).
When the synchronized playback control unit 52 receives the playback start notification signal from the receiving unit 54, the synchronized playback control unit 52 sends a decoding start instruction signal indicating to the decoding unit 55 to start decoding the temporarily stored encoded video data. In addition to outputting, a transmission start signal indicating the start of transmission of encoded data to the decoding unit 55 is sent to the receiving unit 54. When receiving the transmission start signal, the reception unit 54 starts transmission of encoded data to the decoding unit 55.
Furthermore, the synchronized playback control unit 52 creates a playback start execution notification signal indicating that decoding of the encoded video data of the slave playback terminal 50 (60, 70) has started, and outputs it to the transmission unit 53 (step 742). ).

In the slave reproduction terminal 50 (60, 70), when the decoding start instruction signal is input from the synchronous reproduction control unit 52, the decoding unit 55 uses the slave reproduction terminal identifier stored in the slave storage unit 57 and the reproduction setting file. Based on the initial selection area information and the number of divisions of the multi-view reproduction file, reproduction area information indicating the position of the reproduction responsible area of the slave reproduction terminal 50 (60, 70) in the selected area is created.
For example, the slave playback terminal identifier “2” is stored in the slave storage unit 57 of the slave playback terminal 50. The slave storage unit 57 of the slave playback terminal 50 stores initial selection area information (X, Y, width, height) = (300, 700, 2600, 1000) or relative coordinate values (0 .075, 0.35, 0.65, 0.5) and the number of divisions of the multi-view playback file {vertical division number = 2, horizontal division number = 2}. Therefore, the synchronized playback control unit 52 is indicated by the initial selection area information (300, 700, 2600, 1000) or the relative coordinate values (0.075, 0.35, 0.65, 0.5) expressed in relative coordinates. When the selected area S1 is divided into four, reproduction area information indicating that the area corresponding to the slave reproduction terminal identifier “1” is the upper right area in the selection area S1 is created. Note that the playback area corresponding to the combination of the initial selection area information, the number of divisions, and the slave playback terminal identifier is determined in advance, and information indicating these relationships is preinstalled in the decoding unit 55 as a program. .

Further, the decoding unit 55 includes initial selection area information (300, 700, 2600, 1000) or relative coordinate values (0.075, 0.35, 0.65, 0.5) expressed in relative coordinates, and a slave. Based on the reproduction area information of the reproduction terminals 50 (60, 70), reproduction area values indicating the second to fourth display reproduction responsible areas R12 to R14 corresponding to the slave reproduction terminals 50 (60, 70) are calculated.
For example, the synchronous playback control unit 52 of the slave playback terminal 50 calculates playback area value = (1600, 700, 1300, 500) indicating the second display playback charge area R12 corresponding to the slave playback terminal 50.
Similarly, the slave playback terminal 60 calculates the playback area value = (300, 1200, 1300, 500) indicating the third display playback area R13 corresponding to the slave playback terminal 60. Similarly, the slave playback terminal 70 calculates the playback area value = (1600, 1200, 1300, 500) indicating the fourth display playback area R14 corresponding to the slave playback terminal 70 (step 743).

The decoding unit 55 calculates the initial selection area information (300, 700, 2600, 1000) or the relative coordinate value (0.075, 0.35, 0.65, 0.5) expressed in relative coordinates and in step 743. Based on the playback area value of each of the slave playback terminals 50 (60, 70), the main encoded video data included in the encoded video data and the navigation encoded video data are decoded by 1 GOP. Start in parallel in units. In the slave playback terminal 50 (60, 70), when navigation encoded video data is not displayed, only decoding of the main encoded video data is started.
The main video decoded based on the initial selection area information and the reproduction area value is larger in size than the slave reproduction area shown in FIG. Therefore, based on the playback area value of the slave playback terminal 50 (60, 70), the slave 50 (60, 70) playback area video is cut out, and the slave 50 (60, 70) playback area video and the navigation video are displayed. Send to part 56. Further, the decoding unit 55 cuts out the reproduction area for each reproduction terminal from the decoded navigation video based on the selection area information, the reproduction area information, and the reproduction area value, further converts the reproduction area into thumbnails, and the master reproduction terminal 40 and the slave reproduction terminal 50. The thumbnail image (60, 70) is sent to the display unit 56 (step 744).

Next, with reference to FIG. 19, the continuation of the video division reproduction method according to the present embodiment will be described.
On the other hand, the transmission unit 53 sends the reproduction start execution notification signal received from the synchronous reproduction control unit 52 in step 742 to the master reproduction terminal 40 via the network (B) 31 (step 745).
Next, in the master reproduction terminal 40, the receiving unit 44 receives the reproduction start execution notification signal from the slave reproduction terminal 50 (60, 70) via the network (B) 31, and synchronously reproduces the received reproduction start execution notification. The data is sent to the control unit 42 (step 746).

  The synchronized playback control unit 42 receives a playback start execution notification from the receiving unit 44. The synchronized playback control unit 42 has received playback start execution notification signals from all the slave playback terminals 50 (60, 70). Determine. When the reproduction start execution notification signal is received from all the slave reproduction terminals 50 (60, 70), the synchronous reproduction control unit 42 starts decoding the temporarily stored encoded video data to the decoding unit 45. In addition to outputting a decoding start instruction signal indicating that transmission is to be performed, a transmission start signal indicating transmission start is transmitted to the reception unit 44 to the decoding unit 45 of encoded data. When receiving the transmission start signal, the receiving unit 44 starts transmitting the decoded data to the decoding unit 45 (step 747).

In the master playback terminal 40, when receiving the decoding start instruction signal from the synchronized playback control unit 42, the decoding unit 45 selects the master playback terminal identifier stored in the master storage unit 47 and the playback setting file. Based on the area information and the number of divisions of the multi-view reproduction file, reproduction area information indicating the position of the reproduction charge area of the master reproduction terminal 40 in the selected area is created.
For example, the master playback terminal identifier “0” is stored in the master storage unit 47 of the master playback terminal 40. Further, the master storage unit 47 stores initial selection area information (X, Y, width, height) = (300, 700, 2600, 1000), or relative coordinate values (0.075, 0. 35, 0.65, 0.5) and the number of divisions of the multi-view playback file {vertical division number = 2, horizontal division number = 2}. Therefore, the synchronized playback control unit 42 uses the initial selection area information (300, 700, 2600, 1000) or the relative coordinate values (0.075, 0.35, 0.65, 0.5) expressed in relative coordinates. When the selection area S1 shown is divided into four, reproduction area information indicating that the area corresponding to the master reproduction terminal identifier “0” is the upper left area in the selection area S1 is created. Note that the playback area corresponding to the combination of the initial selection area information, the number of divisions, and the slave playback terminal identifier is determined in advance, and information indicating these relationships is preinstalled in the decoding unit 45 as a program. .
Further, the decoding unit 45 includes initial selection area information (300, 700, 2600, 1000) or relative coordinate values (0.075, 0.35, 0.65, 0.5) expressed in relative coordinates, and a master. From the reproduction area information of the reproduction terminal 40, a reproduction area value indicating the first display reproduction responsible area R11 corresponding to the master reproduction terminal 40 is calculated.
For example, the synchronous playback control unit 42 of the master playback terminal 40 calculates a playback area value (300, 700, 1300, 500) indicating the first display playback charge area R11 corresponding to the master playback terminal 40 (step 748).

  In step 748, the decoding unit 45 performs initial selection area information (300, 700, 2600, 1000) or relative coordinate values (0.075, 0.35, 0.65, 0.5) expressed in relative coordinates. Based on the calculated playback area value of the master playback terminal 40, decoding of the main encoded video data included in the decoded video data and decoding of the navigation encoded video data are started in parallel in units of 1 GOP. In the master playback terminal 40, when the navigation encoded video data is not displayed, only decoding of the main encoded video data is started.

  The main video decoded based on the initial selection area information and the reproduction area value is larger than the master reproduction area shown in FIG. Therefore, based on the playback area value of the master playback terminal 40, the master playback area video is cut out, and the master playback area video and the navigation video are sent to the display unit 56. Further, the decoding unit 45 cuts out the playback area for each playback terminal from the decoded navigation video based on the selection area information, the playback area information, and the playback area value, and further converts them into thumbnails. The master playback terminal 40 and the slave playback terminal 50 The thumbnail image (60, 70) is sent to the display unit 46 (step 749).

Here, when an operation for changing the selection area of the main video or the navigation video is input by an operation of a user through an operation unit (not shown) of the master playback terminal 40, the playback request unit 41 is synchronized with the synchronous playback control unit 42. In contrast, post-change selection area information indicating the post-change selection area is sent. The synchronized playback control unit 42 sends the received changed selection area information to the decoding unit 45 (step 750).
Note that the reproduction request unit 41 sends selection region information to the synchronous reproduction control unit 42 when an operation for changing the selection region is input by a user operation. For example, as an operation for changing the selection region, when the user presses the “→” key of the keyboard once, the reproduction request unit 41 receives an operation of moving the image on the screen by N pixels in the direction of the arrow. That is, the reproduction request unit 41 generates selection region information when each value of the current selection region information is moved N pixels in the arrow direction as selection region information, and sends the selection region information to the synchronous reproduction control unit 42.
When the user continues to press the “→” key, the reproduction request unit 41 inputs an operation for continuously changing the selection area.
The synchronized playback control unit 42 sends the selection area information to the transmission unit 43. Further, the synchronized playback control unit 42 sends the selection area information to the decoding unit 45. The transmission unit 43 transmits the selected region information received to each of the slave reproduction terminals 50 (60, 70) at the timing when the selected region information is received from the synchronous reproduction control unit 42.

Here, with reference to FIG. 23, the timing when the operation for changing the selection area is input and the timing when the master playback terminal 40 transmits the selection area information to the slave playback terminals 50 (60, 70) will be described. FIG. 23 is a diagram for describing the transmission timing of the selection area information in the present embodiment.
The synchronized playback control unit 42 determines whether or not there is an input of the next selection region information from the playback request unit 41 while counting the time interval at which the selection region information is input by a built-in timer. The synchronized playback control unit 42 determines whether or not to input the next selected region information within the first specified time from the point when the currently specified selected region information is input from the playback request unit 41. In the present embodiment, the first designated time is, for example, a time corresponding to the length of one frame and is 33 msec.
When the next selection area information is input within the first specified time from the time when the currently specified selection area information is input from the reproduction request section 41, the synchronized reproduction control section 42 is currently specified by the reproduction request section 41. The next selected area information is output to the transmitting unit 43 and the decoding unit 45 after the first designated time from the input of the selected area information.
For example, when the user continues to press the “→” key, an operation for changing the selected area is continuously input to the reproduction request unit 41. In this case, the reproduction request unit 41 continuously outputs the changed selected area information to the synchronous reproduction control unit 42 at intervals of less than one frame (33 msec). When the reproduction is started, the synchronous reproduction control unit 42 starts a timer, and sequentially decodes the selection area information received from the reproduction request unit 41 in the order received, with the transmission unit 43 every first designated time (33 msec). Send to part 45. That is, the synchronized playback control unit 42 outputs the selected area information to the transmission unit 43 and the decoding unit 45 at an interval of 33 msec. Therefore, the transmission unit 43 transmits the selected area information to the slave playback terminal 50 (60, 70) at an interval of 33 msec.

On the other hand, when the first designated time has elapsed since the selection area information currently designated from the reproduction request unit 41 is input, the synchronized reproduction control unit 42 obtains the selection area information currently designated from the reproduction request section 41. It is determined whether or not the next selection area information is input within the second designated time from the input time. The second designated time is longer than the first designated time, for example, 500 msec.
When the next selection area information is input within the second specified time from the time when the currently specified selection area information is input from the reproduction request section 41, the synchronous reproduction control section 42 receives the selection area information from the reproduction request section 41. The selected area information is output to the transmission unit 43 and the decoding unit 45 at each input timing. That is, when an operation for changing the selection area by a user operation is input at an interval of 33 msec or more and less than 500 msec, the transmission unit 43 selects the selection area information each time the selection area information is input from the synchronous playback control unit 42. Is transmitted to the slave playback terminal 50 (60, 70).

On the other hand, when the next selection area information is not input for the second specified time or more from the time when the currently specified selection area information is input from the reproduction request section 41, the synchronous reproduction control section 42 receives the current designation from the reproduction request section 41. The currently selected selection area information is output to the transmission unit 43 and the decoding unit 45 after the second specified time from the time when the selected selection area information is input.
That is, when an operation for changing the selection area is not input by a user operation, the reproduction request unit 41 does not transmit the selection area information to the synchronous reproduction control unit 42. Therefore, the synchronized playback control unit 42 does not receive selection area information. When the selected playback area information is not received from the playback request 41 for 500 msec or longer, the synchronized playback control section 42 transmits the currently specified selected area information to the transmission section 43 and the decoding section every second specified time (for example, 500 msec). Send to 45. In other words, when the operation for changing the selection area is not input by the user operation for the second specified time or longer, the transmission unit 43 is the second specified time after the input of the currently specified selection area information from the reproduction request unit 41. The currently designated selection area information is transmitted to the slave playback terminal 50 (60, 70).
As described above, the interval at which the synchronized playback control unit 42 transmits the selection region information to the transmission unit 43 and the decoding unit 45 differs according to the timing when the operation for changing the selection region is input by the user operation. When there is no input by user operation, the interval which transmits selection area information is taken longer than the case where a selection area is changed.

  The decoding unit 45 receives the changed selection area information from the synchronized playback control unit 42, and receives the changed selection area information received and the selection area specified for the main video (or navigation video) currently being played back. The selected area information is compared with the selected area information (hereinafter referred to as pre-changed area information). If the area indicated by the post-change selection area information and the area indicated by the pre-change selection area information do not match, the decoding unit 45 receives the received post-change selection area information and each of the playback terminals 40 and 50 (60, 70). A reproduction area value for each reproduction terminal is newly created from the reproduction area information.

  Note that the switching to the selected area information after change by the decoding unit 45 is from the frame next to the frame being decoded. The decoding unit 45 performs the decoding of the main encoded video data and the decoding of the navigation encoded video data based on the received changed selection area information and the reproduction area information of the master playback terminal 40 in units of 1 GOP. Start in parallel. The main video decoded based on the post-change selection area information and the reproduction area value is larger than the master reproduction area shown in FIG. Therefore, based on the new playback area value of the master playback terminal 40, the master playback area video is cut out, and the master playback area video and the navigation video are sent to the display unit 46. Further, from the decoded navigation video, the playback area for each playback terminal is cut out based on the changed selection area information, the playback area information, and the new playback area value, and further converted into thumbnails. The master playback terminal 40 and the slave playback terminal 50 ( 60, 70) is sent to the display unit 46 (step 751).

Next, with reference to FIG. 20, a continuation of the video division reproduction method according to the present embodiment will be described.
In the master playback terminal 40, the synchronized playback control unit 42 receives the changed selection region information from the decoding unit 45 at every specified time, and outputs the received changed selection region information to the transmission unit 43 (step 752). The transmission unit 43 transmits the received changed selection area information to all the slave playback terminals 50, 60, and 70 via the network (B) 31 (step 753).

In the slave playback terminal 50 (60, 70), the receiving unit 54 receives the changed selection area information from the master playback terminal 40 via the network (B) 31, and receives the received changed selection area information in the synchronous playback control section 52. (Step 754).
Upon receiving the changed selection area information, the synchronized playback control section 52 outputs the changed selection area information to the decoding section 55 (step 755).

The decoding unit 55 compares the received selected area information after change with the selected area information before change being reproduced. When the area indicated by the post-change selection area information and the area indicated by the pre-change selection area information do not match, the decoding unit 55 reproduces the received post-change selection area information and each slave playback terminal 50 (60, 70). Based on the area information, new reproduction area values indicating the second to fourth display reproduction responsible areas R12 to 14 corresponding to the slave reproduction terminals 50 (60, 70) are calculated.
Note that the switching to the changed selected area information by the decoding unit 55 is from the frame next to the frame that is being decoded. The decoding unit 55 decodes the main encoded video data based on the received changed selection area information and the reproduction area information of each of the slave playback terminals 50 (60, 70), and navigation encoded video. Decryption with data is started in parallel in units of 1 GOP. The main video decoded based on the post-change selection area information and the reproduction area information is larger than the slave reproduction area shown in FIG. Therefore, each slave playback area video is cut out based on the new playback area value of the slave playback terminal 50 (60, 70), and the slave playback area video and the navigation video are sent to the display unit 56. Further, based on the selected navigation area information, the playback area information, and the new playback area value, the playback area for each playback terminal is cut out from the decoded navigation video, further converted into thumbnails, and the master playback terminal 40 and slave playback terminal 50 (60). , 70) is sent to the display unit 56 (step 756).

In the master reproduction terminal 40, the decoding unit 45 confirms the reproduction time at that time every specified time. Since the main video and the navigation video are decoded in parallel, either playback time may be used. The decoding unit 45 outputs reproduction time information indicating the confirmed reproduction time to the synchronous reproduction control unit 42 (step 757).
The synchronized playback control unit 42 outputs the playback time information received from the decoding unit 45 to the transmission unit 43 (step 758). The transmission unit 43 transmits the reproduction time information received from the synchronous reproduction control unit 42 to the slave reproduction terminal 50 (60, 70) via the network (B) 31 (step 759).

Next, with reference to FIG. 21, a continuation of the video division reproduction method according to the present embodiment will be described.
In the slave playback terminal 50 (60, 70), the receiving unit 54 receives playback time information from the master playback terminal 40 via the network (B) 31, and outputs the received playback time information to the synchronous playback control unit 52 ( Step 760). The slave playback terminal 50 (60, 70) does not necessarily match the playback time from the master playback terminal 40. For example, the playback time information received from the other slave playback terminals 50 (60, 70) is synchronously played back. You may output to the control part 52. FIG. Note that the master playback terminal 40 may also output the playback time information received from any of the slave playback terminal 50, the slave playback terminal 60, and the slave playback terminal 70 to the synchronous playback control unit 42.
The synchronous playback control unit 52 outputs the received playback time information to the decoding unit 55 (step 761).
The decoding unit 55 compares the reproduction time indicated by the reproduction time information received from the synchronous reproduction control unit 52 with the reproduction time of the content video displayed on the display unit 56 at the time when the slave reproduction terminal 50 (60, 70) compares. If they are the same, play them as they are. If the slave playback terminal 50 (60, 70) has advanced, the amount of time that has been advanced is stopped. If the slave playback terminal 50 (60, 70) is delayed, the playback is performed by fast-forwarding the delayed time (step 762).

In the master reproduction terminal 40, the reproduction request unit 41 sends a reproduction stop to the synchronous reproduction control unit 42 (step 763).
The synchronized playback control unit 42 sends a playback stop to the transmission unit 43. Further, the reproduction stop is sent to the decoding unit 45. The transmission stop of the encoded video data is sent to the receiving unit 44 (step 764).
When the transmission unit 43 receives the reproduction stop from the synchronous reproduction control unit 42, the transmission unit 43 transmits the reproduction stop to each slave reproduction terminal 50, 60, 70 via the network (B) 31. Further, the transmission unit 43 sends a distribution stop to the distribution server 20 via the network (A) 30 (step 765).

When receiving the encoded video data transmission stop from the synchronous reproduction control unit 42, the receiving unit 44 of the master reproduction terminal 40 stops the encoded video data transmission to the decoding unit 45 (step 766).
The decoding unit 44 stops decoding and sends a reproduction stop to the display unit 46. The display unit 46 stops the reproduction (step 767).
In the slave playback terminal 50 (60, 70), the receiving unit 54 receives a playback stop from the master playback terminal 40 via the network (B) 31, and outputs the received playback stop to the synchronous playback control unit 52 (step 768). ).

Next, with reference to FIG. 22, a continuation of the video division reproduction method according to the present embodiment will be described.
The synchronized playback control unit 52 sends a playback stop to the decoding unit 55. An encoded video data transmission stop is sent to the receiving unit 54. A delivery stop is sent to the transmission unit 53 (step 769).
When the transmission unit 53 receives the distribution stop from the synchronous reproduction control unit 52, the transmission unit 53 transmits the distribution stop to the distribution server 20 via the network (A) 30 (step 770).
When receiving the encoded video data transmission stop from the synchronous reproduction control unit 52, the receiving unit 54 stops the video data transmission by encoding to the decoding unit 55 (step 771).
When receiving the reproduction stop from the synchronous reproduction control unit 52, the decoding unit 55 stops the decoding and sends the reproduction stop to the display unit 56. The display unit 56 stops the reproduction (step 772).

With the above configuration, the video split playback system according to the present embodiment splits the video and displays the split video on a multi-screen composed of a plurality of displays even when displaying a video with high resolution. Thus, the processing load on each playback terminal can be reduced. In addition, even with high-resolution video that has a heavy processing load and cannot be played back by a single playback terminal, the video split playback system according to this embodiment can play back video that has been split on multiple displays in synchronization. Can do.
In addition, as described above, the distribution server 20 that distributes high-resolution content, the master playback terminal 40, the slave playback terminal 50, the slave playback terminal 60, and the slave playback terminal 70 are connected via a wide area network A that is connected over a wide range. Connected. In addition, the slave reproduction terminal 50, the slave reproduction terminal 60, and the slave reproduction terminal 70 are connected via a limited range network B within a limited range in a specific building or site.
Therefore, the video division reproduction system according to the present embodiment can perform content video division processing within the range of the limited range network B.

Second Embodiment
Further, the playback terminal according to the present invention is not limited to the above configuration, and may be a system including a main playback terminal 80 and a sub playback terminal 90 as shown in FIG. This embodiment is different from the first embodiment in that the same selected video is displayed on the main playback terminal 80 and the sub playback terminal 90 without dividing the selected video.
The main playback terminal 80 is a remote controller that controls the operation of the sub playback terminal 90, for example. The sub playback terminal 90 is, for example, a television. Therefore, the display unit 96 of the sub reproduction terminal 90 is larger than the screen of the display unit 86 of the main reproduction terminal 80 and has a higher resolution.

As shown in FIG. 24, the main playback terminal 80 has a playback request unit 81, a synchronous playback control unit 82, a transmission unit 83, a reception unit 84, and a decoding unit 85 that have the same configuration as the master playback terminal 40. And a display unit 86 and a storage unit 87. In addition, about each structure, the reproduction | regeneration request | requirement part 41 of the master reproduction | regeneration terminal 40, the synchronous reproduction | regeneration control part 42, the transmission part 43, the receiving part 44, the decoding part 45, the display part 46, and the master memory | storage part 47 Since it is the same, detailed description is abbreviate | omitted.
Here, for example, the main playback terminal 80 sends the selected area information to the sub playback terminal 90 as a relative coordinate value. The main playback terminal 80 performs decoding and playback based on the selection area information of relative coordinate values. Unlike the master playback terminal 40, the main playback terminal 80 does not generate playback area information.
Further, the sub reproduction terminal 90 includes a synchronous reproduction control unit 92, a transmission unit 93, a reception unit 94, a decoding unit 95, a display unit 96, and a configuration similar to those of the slave reproduction terminal 50 (60, 70). And a storage unit 97. For each configuration, the slave playback terminal 50 of the slave playback terminal 50 (60, 70) includes a synchronized playback control unit 52, a transmission unit 53, a reception unit 54, a decoding unit 55, a display unit 56, Since it is the same as that of the slave storage unit 57, a detailed description is omitted.
Here, for example, when the sub reproduction terminal 90 receives the selection area information as a relative coordinate value from the main reproduction terminal 80, the sub reproduction terminal 90, based on the selection area information of the relative coordinate value received from the frame next to the currently restored frame, Decrypt and play. Note that, unlike the slave playback terminals 50 (60, 70), the sub playback terminal 90 does not generate playback area information.
In this way, even when the resolutions of the main display and the sub display are different, the selected video indicating the same region (video) selected is displayed on the main display of the main playback terminal 80 at a low resolution, and the sub playback terminal 90 Each sub-display can be displayed with high resolution.

25 and 26 are sequence diagrams for explaining processing by the video division reproduction system according to the present embodiment. Specifically, it is a sequence diagram for explaining a process from a distribution request to a reproduction start process, a user operation selection area divided reproduction process, and a reproduction stop.
The sequence shown in FIG. 25 will be described below.
1. The main playback terminal 80 has a TCP / IP connection with the sub playback terminal 90. The main playback terminal 80 sends the content URL input from the user to the distribution server 20. The main reproduction terminal 80 receives the encoded video data and the reproduction setting file corresponding to the content URL from the distribution server 20 and stores the reproduction setting file in the storage unit 87. Here, the reproduction start of the encoded video data of the main reproduction terminal 80 is not yet executed. The main playback terminal 80 starts receiving encoded video data, but avoids a situation where the reception buffer overflows by performing distribution control from the remaining reception buffer. The distribution server 20 distributes the encoded video data as a stream to the main playback terminal 80.

2. The main playback terminal 80 transmits the content URL to the sub playback terminal 90. The sub reproduction terminal 90 receives the content URL from the main reproduction terminal 80.
3. The sub reproduction terminal 90 sends the content URL to the distribution server 20. The sub reproduction terminal 90 receives the encoded video data and the reproduction setting file corresponding to the content URL from the distribution server 20 and stores the reproduction setting file in the storage unit 97. Here, the reproduction start of the encoded video data of the sub reproduction terminal 90 is not yet executed. The sub reproduction terminal 90 starts receiving encoded video data, but avoids a situation where the reception buffer overflows by performing distribution control from the remaining reception buffer. The distribution server 20 distributes the encoded video data as a stream to the sub reproduction terminal 90.

4). The sub reproduction terminal 90 transmits a reception start notification to the main reproduction terminal 80.
5. When the main playback terminal 80 receives the reception start notification from the sub playback terminal 90, the main playback terminal 80 outputs the encoded video data from the reception unit 84 to the 1 GOP decoding unit 85. Further, the main playback terminal 80 outputs the playback setting file read from the storage unit 87 to the decoding unit 85.
6). Then, the main playback terminal 80 notifies the sub playback terminal 90 of playback preparation.

7). When receiving the playback preparation from the main playback terminal 80, the sub playback terminal 90 outputs the encoded video data from the receiving unit 94 to the 1 GOP decoding unit 95. In addition, the sub reproduction terminal 90 outputs the reproduction setting file read from the storage unit 97 to the decoding unit 95.
8). The sub playback terminal 90 notifies the main playback terminal 80 of the completion of playback preparation.
9. When the main playback terminal 80 receives the playback preparation completion from the sub playback terminal 90, the main playback terminal 80 notifies the sub playback terminal 90 of the start of playback.

  10. When the sub reproduction terminal 90 receives the reproduction start, the decoding unit 95 starts decoding and reproduction of the corresponding main video based on the initial selection area information described in the reproduction setting file. Further, the sub reproduction terminal 90 may start reproducing the navigation video.

11. The sub reproduction terminal 90 notifies the main reproduction terminal 80 of the reproduction start execution.
12 When the main playback terminal 80 receives the playback start execution from the sub playback terminal 90, the decoding unit 85 starts decoding and playback of the corresponding main video based on the initial selection area information described in the playback setting file. . Further, the main playback terminal 80 may start playback of the navigation video.

Next, the sequence shown in FIG. 26 will be described below.
Here, the user instructs the main playback terminal 80 to change the selection area.
13. The main playback terminal 80 decodes and plays back the corresponding main video based on the new selection area information indicating the position of the selection area after the change designated by the user. The main playback terminal 80 may play back the navigation video.

14 The main playback terminal 80 transmits new selection area information to the sub playback terminal 90 at each designated time.
15. The sub playback terminal 90 receives new selection area information from the main playback terminal 80. Then, the sub reproduction terminal 90 decodes and reproduces the main video based on the received new selection area information. The sub reproduction terminal 90 may reproduce the navigation video.

16. The main playback terminal 80 checks the playback time for each specified time. The main playback terminal 80 transmits information indicating playback time (hereinafter referred to as playback time information) to the sub playback terminal 90. The reproduction time information is information representing the order of reproducing the content video by the video reproduction time.
17. The sub playback terminal 90 matches the playback time of the content video displayed by the sub playback terminal 90 with the playback time indicated by the received playback time information of the main playback terminal 80. The playback time inquiry may be performed by transmitting playback time information from the sub playback terminal 90 to the main playback terminal 80 so that the main playback terminal 80 matches the playback time of the sub playback terminal 90.
18. When the main playback terminal 80 executes playback stop, the main playback terminal 80 notifies the sub playback terminal 90 of playback stop.
19. Then, the sub reproduction terminal 90 receives the reproduction stop.
20. The main reproduction terminal 80 transmits a distribution stop to the distribution server 20.
21. The main playback terminal 80 stops playback.
22. The sub reproduction terminal 90 transmits a distribution stop to the distribution server 20.
23. The sub playback terminal 90 stops playback.

  In addition, in the video division reproduction method according to the video division reproduction system according to the present embodiment, the reproduction terminal and the distribution server are connected via a wide area network, and the distribution server distributes the encoded video data to the reproduction terminal. Is classified into a master playback terminal and a slave playback terminal, the slave playback terminal is under the control of the master playback terminal, the master playback terminal and the slave playback terminal are connected by a network within a limited range, and the master playback terminal selects A method of transmitting region information to a slave playback terminal, matching the playback time of the slave playback terminal with the playback time of the master playback terminal, dividing one image into a plurality of playback terminals, and performing playback synchronously. The terminal requests the distribution server to distribute the multi-view playback file, and the master playback terminal restores the received multi-view playback file to the master playback terminal. When the master playback terminal receives the encoded video data and the playback setting file, the master playback terminal sends a request for distributing the encoded video data of the content URL described in the multi-view playback file to the distribution server. The terminal notifies all slave playback terminals of the multi-view playback file URL requested by the master playback terminal, and the slave playback terminal transmits a delivery request for the multi-view playback file received from the master playback terminal to the delivery server. The playback terminal sends the received multi-view playback file to the slave playback terminal decoding unit, sends a delivery request for the encoded video data of the content URL described in the multi-view playback file to the delivery server, and the slave playback terminal When the encoded video data and the playback setting file are received When the master playback terminal notifies the master playback terminal of the start of reception of the encoded video data and receives the encoded video data reception start notification from all the slave terminals, the master playback terminal sends the encoded video data to the decoding unit of the master playback terminal and plays it back. The setting file is sent to the decoding unit, and the master playback terminal notifies all the slave playback terminals of the playback preparation. When the slave playback terminal receives the playback preparation, the slave playback terminal sends the encoded video data to the decoding unit of the slave playback terminal and plays it back. The setting file is sent to the decoding unit, and the master playback terminal is notified of the completion of playback preparation.

When the master playback terminal receives the playback preparation completion notification from all the slave playback terminals, it notifies the playback start to all the slave playback terminals. When the slave playback terminal receives the playback start notification, the master playback terminal receives the number of divisions and the initial gaze area information. Then, the playback area information and the playback area value are created based on the slave playback terminal identifier, decoding of the area in charge of the main encoded video data is started based on the initial selection area information and the playback area information, and the playback area value Based on the above, the divided video in charge is cut out and reproduction of the divided video in charge of the main video is started. Further, the master playback terminal is notified of the start of playback.
When receiving the playback start execution notification from all slave playback terminals, the master playback terminal creates playback area information and playback area values based on the number of divisions, initial gaze area information, and slave playback terminal identifiers, and sets initial selection area information and Based on the playback area information, decoding of the master area in charge of the main encoded video data is started, and the master divided video in charge is cut out based on the playback area value, and playback of the master divided video in charge of the main video is started. .
As described above, the divided main video can be reproduced in synchronization between the master reproduction terminal and all slave reproduction terminals.

In addition, in the video division reproduction method according to the video division reproduction system according to the present embodiment, the reproduction terminal and the distribution server are connected via a wide area network, and the distribution server distributes encoded video data to the reproduction terminal. Is classified into a master playback terminal and a slave playback terminal, the slave playback terminal is under the control of the master playback terminal, the master playback terminal and the slave playback terminal are connected by a network within a limited range, and the master playback terminal selects A method of transmitting region information to a slave playback terminal, matching the playback time of the slave playback terminal with the playback time of the master playback terminal, dividing one image into a plurality of playback terminals, and performing playback synchronously. The selection area is changed from the video that is being stream-reproduced to the terminal display unit, and the master reproduction terminal displays the selection area information of the changed selection area for each specified time. The master playback terminal and all slave playback terminals create a new playback area value based on the selected area information and the playback area information, and from the next frame being decoded, the selected area is transmitted to the slave playback terminal. Based on the information and the reproduction area information, the main encoded video data in charge is decoded, and the divided video in charge is cut out based on the reproduction area value to reproduce the divided video in charge of the main video.
As described above, the divided main video can be reproduced in synchronization between the master reproduction terminal and all slave reproduction terminals.

In addition, in the video division reproduction method according to the video division reproduction system according to the present embodiment, the reproduction terminal and the distribution server are connected via a wide area network, and the distribution server distributes the encoded video data to the reproduction terminal. Is classified into a master playback terminal and a slave playback terminal, the slave playback terminal is under the control of the master playback terminal, the master playback terminal and the slave playback terminal are connected by a network within a limited range, and the master playback terminal selects A method of transmitting region information to a slave playback terminal, matching the playback time of the slave playback terminal with the playback time of the master playback terminal, dividing one image into a plurality of playback terminals, and performing playback synchronously. The terminal checks the playback time at each specified time, and the master playback terminal sends playback time information indicating the confirmed playback time to all slave playback terminals. The slave playback terminal compares the playback time of the slave playback terminal when compared with the playback time information indicated by the received playback time information, and if the comparison result is the same playback time as the master playback terminal, continues playback as it is, Also, if the comparison result is a playback delay from the master playback terminal, playback is fast-forwarded by the delayed time, and if the comparison result is playback from the master playback terminal, playback is performed for the time that has been advanced. To stop.
As described above, the divided main video can be reproduced in synchronization between the master reproduction terminal and all slave reproduction terminals.

The distribution server 20, the master playback terminal 40, the slave playback terminal 50, the slave playback terminal 60, and the slave playback terminal 70 described above have a computer system therein. The operation processes of the distribution server 20, the master playback terminal 40, the slave playback terminal 50, the slave playback terminal 60, and the slave playback terminal 70 are stored in a computer-readable recording medium in the form of a program. Is read out and executed by the computer system to perform the above processing. The “computer system” herein includes a CPU, various memories, an OS, and hardware such as peripheral devices.
Further, the “computer system” includes a homepage providing environment (or display environment) if a WWW system is used.

Further, a program for realizing each step is recorded on a computer-readable recording medium, and the distribution server 20, the master playback terminal 40, the slave playback terminal 50, the slave playback terminal 60, and the slave playback terminal 70 A program for realizing the functions is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read into a computer system and executed to calculate an estimated value of the shape information of the detection target. You may perform the process to do.
The “computer-readable recording medium” means a flexible disk, a magneto-optical disk, a ROM, a writable nonvolatile memory such as a flash memory, a portable medium such as a CD-ROM, a hard disk built in a computer system, etc. This is a storage device.

Further, the “computer-readable recording medium” means a volatile memory (for example, DRAM (Dynamic DRAM) in a computer system that becomes a server or a client when a program is transmitted through a network such as the Internet or a communication line such as a telephone line. Random Access Memory)), etc., which hold programs for a certain period of time.
The program may be transmitted from a computer system storing the program in a storage device or the like to another computer system via a transmission medium or by a transmission wave in the transmission medium. Here, the “transmission medium” for transmitting the program refers to a medium having a function of transmitting information, such as a network (communication network) such as the Internet or a communication line (communication line) such as a telephone line.
The program may be for realizing a part of the functions described above. Furthermore, what can implement | achieve the function mentioned above in combination with the program already recorded on the computer system, and what is called a difference file (difference program) may be sufficient.

  DESCRIPTION OF SYMBOLS 20 ... Distribution server, 21 ... Reception part, 22 ... Reproduction data storage part, 23 ... Transmission part, 24 ... Server control part, 40 ... Master reproduction terminal, 41 ... Reproduction request part, 42 ... Synchronous reproduction control part, 43 ... Transmission part, 44 ... Reception part, 45 ... Decoding part, 46 ... Display part, 47 ... Master storage part, 50 ... Slave playback terminal, 52 ... Synchronous playback control unit, 53 ... Transmitting unit, 54 ... Receiving unit, 55 ... Decoding unit, 56 ... Display unit, 57 ... Slave storage Part 60 ... slave playback terminal 70 ... slave playback terminal

Claims (7)

Each comprising a delivery server, a master playback terminal, and at least one slave playback terminal that are communicably connected via a network, each comprising a display screen of the master playback terminal and a display screen of the slave playback terminal In a video split playback method in a video split playback system that displays video on a multi-screen,
The distribution server is
The encoded video data of the content video to be displayed on the multi-screen and the division number that is the number of the master playback terminal and the slave playback terminal constituting the multi-screen are transmitted to the master playback terminal and the slave playback terminal. And steps to
The master playback terminal is
Transmitting a slave playback terminal identifier representing the position of the display of the slave playback terminal in the multi-screen with unique information assigned to each of the slave playback terminals to the corresponding slave playback terminal; ,
The slave playback terminal is
Based on selection area information indicating a selection area that is a partial area in the content video, the slave playback terminal identifier, and the number of divisions, slave playback area information indicating an area that the slave playback terminal is responsible for display in the multi-screen Based on the slave playback area information and the selection area information, a slave playback area value indicating an area in which the slave playback terminal is responsible for display among the selection areas in the content video of the encoded video data is calculated. Steps,
The master playback terminal is
Master playback area information indicating an area that the master playback terminal is responsible for display on the multi-screen based on a master playback terminal identifier indicating the display position of the master playback terminal on the master display, the selection area information, and the number of divisions Based on the master reproduction area information and the selection area information, a master reproduction area value indicating an area in which the master reproduction terminal is responsible for display among the selection areas in the content video of the encoded video data is calculated. Steps,
The master playback terminal displays a part of the content video in the area indicated by the master playback area value on its display based on the encoded video data, and the slave playback terminal displays the master playback terminal. Synchronously, based on the encoded video data, displaying a part of the content video in the area indicated by the slave playback area value on its own display;
A video division reproduction method comprising: The master playback terminal is
When information indicating that the first selection area information indicating the selection area of the content video displayed on the multi-screen is changed to different second selection area information is input, the second selection area information is converted into the slave playback terminal. And generating the master reproduction area information based on the second selection area information, the master reproduction terminal identifier, and the number of divisions, and generating the master reproduction area based on the master reproduction area information and the second selection area information. Calculating a value;
The slave playback terminal is
Upon receiving the second selection area information from the master reproduction terminal, the slave reproduction area information is generated based on the second selection area information, the slave reproduction terminal identifier, and the division number, and the slave reproduction area information and the first 2 calculating the slave playback area value based on the selected area information;
The video divided reproduction method according to claim 1, further comprising: The encoded video data includes playback time information that represents the playback order of the content video by the playback time of the video,
The master playback terminal or the slave playback terminal is
When a part of the content video is displayed based on the encoded video data, the playback time information corresponding to the encoded video data of the displayed content video is transmitted, and the master playback terminal or other slave playback is transmitted. 3. The video according to claim 1, wherein, when the playback time information is received from a terminal, the content video is displayed on the respective display so as to match the timing indicated by the received playback time information. Split playback method. The master playback terminal is
It is determined whether information indicating that the first selection area information indicating the selection area of the content video displayed on the display is changed to different second selection area information is input, and the first selection area information When the second selected area information is input before the first designated time elapses after the input of the first selected area information, the slave selects the second selected area information after the first designated time elapses from the time when the first selected area information is transmitted. Send to playback device,
It is determined whether information indicating that the first selection area information indicating the selection area of the content video displayed on the display is changed to different second selection area information is input, and the first selection area information When the second specified time longer than the first specified time has elapsed from the time when the first selected area has been input, the slave reproduces the first selected area information after the second specified time has elapsed since the transmission of the first selected area information. The video division reproduction method according to claim 1, wherein the video division reproduction method is transmitted to a terminal. A video playback method in a video playback system comprising: a distribution server that is communicably connected via a network; a main playback terminal including a main display; and a sub playback terminal including a sub display having a screen size different from that of the main display. In
The distribution server is
Transmitting encoded video data of content video to the main playback terminal and the sub playback terminal;
The main playback terminal is
Inputting selection area information indicating a selection area that is a partial area in the content video;
The main playback terminal is
Transmitting the selected area information to the sub-playback;
The main playback terminal is
Based on the encoded video data, a part of the content video in the area indicated by the selection area information is displayed on the main display,
The sub-playback terminal is
In synchronization with the display of the main playback terminal, based on the encoded video data, displaying a part of the content video in the area indicated by the selection area information on the sub-display;
A video playback method comprising: Each comprising a delivery server, a master playback terminal, and at least one slave playback terminal that are communicably connected via a network, each comprising a display screen of the master playback terminal and a display screen of the slave playback terminal In a split video playback system that displays video on a multi-screen,
The distribution server
The encoded video data of the content video to be displayed on the multi-screen and the division number that is the number of the master playback terminal and the slave playback terminal constituting the multi-screen are transmitted to the master playback terminal and the slave playback terminal. A transmission unit
The master playback terminal is
Transmitters for transmitting, to the corresponding slave playback terminals, slave playback terminal identifiers representing the position of the display screen of the slave playback terminal on the multi-screen as unique information assigned to each of the slave playback terminals When,
Based on the master playback terminal identifier indicating the display position of the master playback terminal on the master display, selection area information indicating a selection area that is a partial area in the content video, and the number of divisions, the master playback on the multi-screen The master playback area information indicating the area in which the terminal is responsible for display is generated, and the master playback terminal of the selected area in the content video of the encoded video data is based on the master playback area information and the selection area information. A master decoding unit that calculates a master playback area value indicating an area in charge of display, and displays a part of the content video in the area indicated by the master playback area value on its display based on the encoded video data; Prepared,
The slave playback terminal
Based on the selection area information, the slave playback terminal identifier, and the number of divisions, the slave playback area information indicating the area that the slave playback terminal is responsible for display in the multi-screen is generated, and the slave playback area information and the selection Based on the region information, among the selected regions in the content video of the encoded video data, calculate a slave playback region value indicating the region that the slave playback terminal is responsible for display, and in synchronization with the display of the master playback terminal, Based on the encoded video data, a slave decoding unit that displays a part of the content video in the area indicated by the slave playback area value on its own display;
A video segmentation playback system comprising: A computer used in a video split playback system that includes a plurality of playback terminals that are communicably connected via a network, and that displays video on a multi-screen configured from a display screen of the playback terminal,
Encoded video data of content video to be displayed on the multi-screen, selection region information indicating a selection region that is a partial region in the content video, and a division number that is the number of the playback terminals constituting the multi-screen Receiving a playback terminal identifier representing the position of the display of the playback terminal on the multi-screen with unique information assigned to each of the playback terminals;
Based on the selection area information, the playback terminal identifier, and the number of divisions, the playback area information indicating the area in which the playback terminal is responsible for display in the multi-screen is generated, and based on the playback area information and the selection area information, Calculating a playback area value indicating an area in which the playback terminal is responsible for display among the selected areas in the content video of the encoded video data;
Based on the encoded video data, displaying a part of the content video in the region indicated by the playback region value on its own display in synchronization with the display of another playback terminal;
Split video playback program to execute.

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