JP2011166637A - Reproduction time continuous reproduction method, video distribution request method, video distribution method, video reproduction method, video distribution system and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reproduce a newly requested gazing-region video image by continuing a reproduction time from the gazing-region video image during stream reproduction, in partial distribution of a video distribution system. <P>SOLUTION: A reproducing terminal transmits an encoded data distribution request corresponding to a selected gazing region through a network to a distribution server. The distribution server continuously reads out encoded data, which are being read currently, without any change, reads encoded data corresponding to a newly requested gazing region from the head of the next GOP (Group Of Picture) to firstly distribute identification information identifying which portion of a video image corresponds to the read encoded data, and next distribute encoded data for one GOP sequentially, in this order through the network to the reproduction terminal. The reproduction terminal sequentially receives the identification information and the encoded data for one GOP and compares the identification information with the identification information being decoded, and when these pieces of identification information are different, the identification information is updated and decoded, thereby, stream reproduction of the newly requested gazing-region video image from the head of the next GOP is performed. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a playback time continuous playback method, a video distribution request method, a video distribution method, a video playback method, a video distribution system, and a program, and more particularly, in the partial distribution of video in a region partially selected from the entire video. The present invention relates to a reproduction time continuous reproduction method, a video distribution request method, a video distribution method, and a video reproduction method for continuously performing a reproduction time from an image being stream-reproduced on a selected area.

In a conventional video distribution system, a partial distribution request from a client is transmitted to a distribution server using a reproduction time at the time of request, and the distribution server performs distribution of a specified part requested to the client from the reproduction time. It was. However, since the stream playback is continuously performed, the newly requested video has been played back with the playback time returned from the video being stream played.
In addition, in the video distribution apparatus, the video received from each camera is synthesized in units of frames, and each user terminal is provided with camera identification information for designating one of the cameras and a part of the entire surrounding video captured by the camera. A transmission request including range designation information for designating a video is transmitted to the video distribution device via the network, and the video distribution device is configured to receive a part of the video based on the range designation information from the video received from the camera designated by the camera identification information. Is known, and is transmitted to the transmission requesting user terminal. (See Patent Document 1 below)

JP 2003-219389 A

As described above, in the prior art, since the stream reproduction is continuously performed, the newly requested video is a reproduction in which the reproduction time is returned from the video being stream reproduced.
The present invention has been made to solve the above-described problems of the prior art, and an object of the present invention is to continuously request a gaze area video that has been newly requested from a gaze area video during stream reproduction. It is to provide a playback time continuous playback method, a video distribution request method, a video distribution method, a video playback, and a video distribution system.
Another object of the present invention is to provide a program for causing a computer to execute the above-described playback time continuous playback method, video distribution request method, and video playback method.
The above and other objects and novel features of the present invention will become apparent from the description of this specification and the accompanying drawings.

Of the inventions disclosed in this application, the outline of typical ones will be briefly described as follows.
(1) In a video distribution system in which a playback terminal and a distribution server are connected via a network, a playback time continuous playback method for generating a partially designated video by continuing playback time, the distribution server includes: Encoded data is stored, and the playback terminal transmits an encoded data distribution request corresponding to the selected gaze area to the distribution server via the network, and the distribution server From the delivery request content, the currently read encoded data is continuously read as it is, and the encoded data corresponding to the newly requested gaze area is read from the head of the next GOP. Identification information for identifying where the encoded data is in the video, and then sequentially in the order of encoded data for 1 GOP, the playback end via the network And the playback terminal sequentially receives the identification information and encoded data for 1 GOP from the distribution server, and compares the identification information with the identification information being decoded for each GOP. The identification information is updated and decoded, and the playback terminal performs stream playback of the newly requested gaze area video from the beginning of the next GOP.
(2) Further, the present invention is a video distribution request method or a video playback method of a playback terminal in the playback time continuous playback method described above.
(3) Moreover, this invention is the video delivery method of a delivery server in the above-mentioned playback time continuous playback method.
(4) Moreover, this invention is a video delivery system which performs the above-mentioned video delivery request method, video delivery method, and video reproduction method.
(5) Further, the present invention is a program for causing a computer to execute the above-described reproduction time continuous reproduction method, video distribution request method, video distribution method, and video reproduction method.

The effects obtained by the representative ones of the inventions disclosed in the present application will be briefly described as follows.
According to the present invention, in the partial distribution of the video distribution system, it is possible to reproduce the newly requested gaze area video from the gaze area video that is being stream-reproduced by continuing the reproduction time.

It is a block diagram which shows schematic structure of the video delivery system of the Example of this invention. It is a figure explaining the display content displayed on the display part of the reproducing | regenerating terminal of the Example of this invention. It is a figure for demonstrating the gaze area | region image | video of the Example of this invention. It is a figure for demonstrating reading of the coding data at the time of the partial designation | designated change of the actual example of this invention. It is a figure for demonstrating delivery of ViewID information of the actual example of this invention, and encoding data. It is a flowchart which shows the process sequence when video reproduction | regeneration is started in the video delivery system of the Example of this invention. It is a flowchart which shows the process sequence when video reproduction | regeneration is started in the video delivery system of the Example of this invention. It is a flowchart which shows the process sequence when video reproduction | regeneration is started in the video delivery system of the Example of this invention. It is a flowchart which shows the process sequence when video reproduction | regeneration is started in the video delivery system of the Example of this invention. It is a flowchart which shows the process sequence when reproducing | regenerating the gaze area | region newly selected from the gaze area | region image | video in stream reproduction | regeneration by continuing the reproduction | regeneration time in the video delivery system of the Example of this invention. It is a flowchart which shows the process sequence when reproducing | regenerating the gaze area | region newly selected from the gaze area | region image | video in stream reproduction | regeneration by continuing the reproduction | regeneration time in the video delivery system of the Example of this invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
In all the drawings for explaining the embodiments, parts having the same functions are given the same reference numerals, and repeated explanation thereof is omitted. Also, the following examples are not intended to limit the interpretation of the scope of the claims of the present invention.
FIG. 1 is a block diagram showing a schematic configuration of a video distribution system according to an embodiment of the present invention. The video distribution system according to this embodiment includes a distribution server 10, a reproduction terminal 20, and a network 30 that connects the distribution server 10 and the reproduction terminal 20.
The distribution server 10 includes a reception unit 11, a request content analysis unit 12, a reproduction data storage unit 13, and a transmission unit 14.
The receiving unit 11 of the distribution server 10 receives a request from the playback terminal 20 via the network 30 and notifies the request content analyzing unit 12 of the received request.
The request content analysis unit 12 receives the received data from the reception unit 11, analyzes the request content, and notifies the reproduction data storage unit 13 of what to read out. Alternatively, the transmission unit 14 is notified of a reply indicating that the stream distribution information from the playback terminal 20 has been received.
The reproduction data storage unit 13 receives a request from the request content analysis unit 12, reads the request received from the request content analysis unit 12 from the reproduction data storage unit 13, and sends the request to the transmission unit 14.

The reproduction data storage unit 13 stores at least an SDP (Session Description Protocol) file, files necessary for reproduction, and encoded data. The SDP file is a file in which necessary information is described in order to start a multimedia session that requires session announcement, session invitation, and the like.
The encoded data includes navigation encoded video data for freely or entirely selecting a region desired to be viewed from the entire video, main encoded video data for reproducing the selected region, and audio encoded data. These are stored in the reproduction data storage unit 13 as one encoded data. The main encoded video data is video data having a higher resolution than the navigation encoded video data. Also, the encoded data may not include the audio encoded data.
The reproduction data storage unit 13 reads out the main encoded video data, the entire navigation encoded video data, and the audio encoded data of the designated part requested for distribution, and combines the three encoded read data into one. Furthermore, first, the ViewID information describing where the read video is is sent to the transmission unit 14 in the order of the encoded data for 1 GOP, and then sent to the transmission unit 14 in this order thereafter.
The transmission unit 14 receives the data read from the reproduction data storage unit 13 and distributes it to the reproduction terminal 20 via the network 30.

The reproduction terminal 20 includes a reproduction request unit 21, a reproduction control unit 22, a transmission unit 23, a reception unit 24, a decoding unit 25, and a display unit 26.
When the user inputs a content URL from the playback request unit 21, the playback request unit 21 sends the input content URL to the playback control unit 22. The content URL indicates the location of the encoded data existing on the network.
In addition, the reproduction request unit 21 sends gaze region information (information on a region selected entirely or partially from the navigation video) to the reproduction control unit 22.
The reproduction control unit 22 performs request control from the reproduction request unit 21, request control to the decoding unit 25, and the transmission unit 23.
The transmission unit 23 receives a request from the reproduction control unit 22 and transmits the request to the distribution server 10.
The receiving unit 24 receives data from the distribution server 10 and sends the received data to the decoding unit 25 or the reproduction control unit 22.
The decoding unit 25 sequentially receives ViewID information and 1 GOP-encoded data from the receiving unit 24 of the playback terminal 20, and the decoding unit 25 compares the ViewID described in the ViewID information with the ViewID being decoded. Sometimes the ViewID is updated and decrypted. The range of X, Y, height, and width is cut out from the decoded main video, and the cut gaze area video, the entire decoded navigation video, and audio (there may be no audio) are sent to the display unit 26.
The display unit 26 receives the gaze area video extracted from the decoding unit 25, the entire navigation video, and audio (there may be no audio), and performs stream playback.
Further, when the user selects a region in whole or in part from the navigation video that is being stream-reproduced on the display unit 26, the reproduction request unit 21 reproduces the selected gaze region information (X, Y, height, width). This is sent to the control unit 22.

FIG. 2 is a diagram for explaining a video displayed on the display unit 26 of the playback terminal 20 according to the embodiment of the present invention.
The display unit 26 includes an entire navigation video 26-1 and a gaze area video 26-2 of the main video that is a high-resolution video corresponding to an area selected in whole or in part by the user from the navigation video. Is displayed.
FIG. 3 is a diagram for explaining a gaze area image 26-2 according to the embodiment of this invention.
As shown in FIG. 3, the resolution of the navigation video is 200 × 400, the gaze area value is the distance (X, Y) from the upper left of the navigation video 26-1, the height, and the width are 20, 50, 120, respectively. Assuming 130, when the resolution of the main video is 2000 × 4000, the gaze area value of the main video is the distance (X, Y) from the upper left, and the height and width are 200, 500, 1200, and 1300. . The main video is a higher resolution video than the navigation video.
In this embodiment, 20, 50, 120, and 130 (200, 500, 1200, and 1300) are used as the gaze area values at the start of reproduction. However, this value is not necessarily required.
The gaze area information of the gaze area video 26-2 includes two pieces of information (1) and (2).

(1) Information necessary for distributing the video of the partially designated area The main video and the navigation video are equally divided and given numbers. The number of divisions and the number correspond to each other. Note that the number of divisions need not be 10 shown in FIG. The identification of the divided location (main encoded video data ID) does not have to be a number.
In the example shown in FIG. 3, when the gaze area in the navigation video is 20, 50, 120, 130, the ViewID of the main encoded video data corresponding to this area is 0, 1, 5, 6, As shown below, the distribution request includes the main encoded video data ID, “X-ViewID:” {view designation (comma delimited)} in the expanded PLAY method shown in Table 1, in the {view designation} field. The navigation encoded video data ID, the main encoded video data identification ID, and the navigation encoded video data identification ID are described.
“X-ViewID:” {0, 1, 5, 6, 1000, 100, 101}
Delimited by commas as described above, 0, 1, 5, 6 in {} are main encoded video data IDs corresponding to the selected gaze area, 1000 is navigation encoded video data ID of the entire navigation video, 100 is a main encoded video data identification ID, and 101 is a navigation encoded video data identification ID. Here, the navigation encoded video data ID, the main encoded video data identification ID, and the navigation encoded video data identification ID do not need to be 1000, 100, and 101, and need not be numbers.
The distribution server 10 is requested by the RTSP protocol, and the distribution server 10 distributes main encoded video data and navigation encoded video data (1000) corresponding to the portions 0, 1, 5, and 6 to the playback terminal 20.
(2) Information Necessary to Play the Specified Area on the Display Unit 26 The range indicated by the distance (X, Y), height, and width from the upper left of the navigation video 26-1 is the gaze area. In the example shown in FIG. 3, the playback terminal 20 receives and decodes the main encoded video data of the 0, 1, 5 and 6 portions, and from the decoded main video, the main video that is the gaze area video from the upper left. A range of distance (200, 500), height (1200), and width (1300) is cut out and stream-reproduced.

FIG. 4 is a diagram for explaining reading of encoded data at the time of partial designation change in the video distribution system of the practical example of the present invention.
Since the request content analysis unit 12 of the distribution server 10 analyzes the extended PLAY method received from the reception unit 11, a partial designation is made from the X-ViewID, and the playback start time (or the entire range line) is not described in the range. The encoded data distribution request partially specified from the next GOP is determined, and the analysis result and information described in the extended PLAY method are sent to the reproduction data storage unit 13 together.
When the reproduction data storage unit 13 receives from the request content analysis unit 12 the analysis result of the partially specified encoded data distribution request from the next GOP, the main encoded video data requested from the head of the next GOP ( ViewID: 2, 3, 4, 7, 8, 9), the entire navigation encoded video data (1000), and audio encoded data (there may be no audio).
In this embodiment, when the reproduction data storage unit 13 receives a partially specified encoded data distribution request from the next GOP, the partially specified main encoded video data (ViewID: 0, 1, 5, 5) currently being read out is received. 6) The entire navigation encoded video data (1000) and audio encoded data (there may be no audio) are continuously read and requested from the beginning of the next GOP (9.5 seconds). Reads main encoded video data (ViewID: 2, 3, 4, 7, 8, 9), navigation encoded video data (1000), audio encoded data (there may be no audio), and read partial designation The main encoded video data, the entire navigation encoded video data, and the audio encoded data (there may be no audio) are made into one encoded data.

Further, as shown in FIG. 5, first, ViewID information (ViewID: 0, 1, 5, 6, 1000) describing where the read video is is sent to the transmission unit 14, and then 1GOP Are sent to the transmission unit 14. Thereafter, the ViewID information and the encoded data for 1 GOP are sequentially transmitted to the transmission unit 14, and the transmission unit 14 sequentially transmits the ViewID information and the encoded data for 1 GOP to the reproduction terminal 20 via the network 30. To do.
The receiving unit 24 of the playback terminal 20 sequentially receives ViewID information and 1-GOP encoded data via the network 30.
In this embodiment, 1 GOP (Group Of Picture) is 15 frames and 0.5 seconds, but it is not always necessary. In addition, the ViewID information may include information other than where the read video is.

FIGS. 6-1 to 6-4 are flowcharts showing a processing procedure when starting video reproduction in the video distribution system according to the embodiment of the present invention.
In step 601, when the user inputs a content URL to the playback request unit 21 of the playback terminal 20, the playback request unit 21 sends the input content URL to the playback control unit 22.
In step 602, the reproduction control unit 22 receives the content URL input from the reproduction request unit 21, and sends a distribution request for a file necessary for reproduction of the received content URL to the transmission unit 23. A file required for reproduction is a text file in which at least main encoded video data ID, navigation encoded video data ID, main encoded video data identification ID, and information necessary for reproduction of navigation encoded video data identification ID are described. It is.
In step 603, the transmission unit 23 receives a file distribution request necessary for reproduction, and transmits the received file distribution request necessary for reproduction to the distribution server 10 via the network 30.

In step 604, the receiving unit 11 of the distribution server 10 receives a request from the playback terminal 20 via the network 30 and sends the request to the request content analyzing unit 12.
In step 605, the request content analysis unit 12 receives the request from the reception unit 11, analyzes the received request content, determines that the request is a file distribution request necessary for reproduction of the content URL, and the request content analysis unit 12 A file distribution request necessary for reproducing the content URL is sent to the reproduction data storage unit 13.
In step 606, the reproduction data storage unit 13 receives a file distribution request necessary for reproduction from the request content analysis unit 12, reads a file necessary for reproduction of the requested content URL, and transmits the file to the transmission unit 14.
In step 607, the transmission unit 14 receives a file necessary for reproducing the content URL from the reproduction data storage unit 13, and transmits the received file to the reproduction terminal 20 via the network 30.

In step 608, the receiving unit 24 of the playback terminal 20 receives a file necessary for playback of the content URL from the distribution server 10 via the network 30 and sends the file to the playback control unit 22.
In step 609, the playback control unit 22 receives a file necessary for playback from the receiving unit 24.
In step 610, when the reproduction control unit 22 receives a file necessary for reproduction from the reception unit 24, the transmission control unit 22 transmits an SDP file distribution request in which the content information requested in step 601 is described by the DESCRIBE method of the RTSP protocol. Send to 23.
In step 611, the transmission unit 23 receives the SDP file distribution request from the reproduction control unit 22, and transmits the SDP file distribution request received from the reproduction control unit 22 to the distribution server 10 via the network 30 using the DESCRIBE method of the RTSP protocol. To do.

In step 612, the receiving unit 11 of the distribution server 10 receives the SDP file distribution request transmitted from the playback terminal 20 via the network 30 and sends the received SDP file distribution request to the request content analysis unit 12.
In step 613, the request content analysis unit 12 receives the request content from the reception unit 11, the request content analysis unit 12 determines that the request is an SDP file distribution request, and sends an SDP file distribution request to the reproduction data storage unit 13.
In step 614, the reproduction data storage unit 13 receives the SDP file distribution request from the request content analysis unit 12, and the reproduction data storage unit 13 receives the SDP corresponding to the content URL requested in step 601 received from the request content analysis unit 12. The file is read, and the read SDP file is sent to the transmission unit 14.
In step 615, the transmission unit 14 receives the SDP file from the reproduction data storage unit 13 and transmits the received SDP file to the reproduction terminal 20 via the network 30 using the RTSP protocol.

In step 616, the receiving unit 24 of the playback terminal 20 receives the SDP file transmitted from the distribution server 10 via the network 30, and the receiving unit 24 sends the SDP file to the playback control unit 22.
In step 617, when the playback control unit 22 receives the SDP file from the receiving unit 24, the playback control unit 22 sets the RTSP protocol SETUP with the protocol and port number stream distribution information used by the playback terminal 20. A transmission request of the method to the distribution server 10 is sent to the transmission unit 23.
In step 618, the transmission unit 23 receives a transmission request for the SETUP method from the reproduction control unit 22 to the distribution server 10, and the transmission unit 23 transmits the SETUP method to the distribution server 10 via the network 30 using the RTSP protocol. To do.

In step 619, the receiving unit 11 of the distribution server 10 receives the SETUP method transmitted from the playback terminal 20 via the network 30, and the receiving unit 11 sends the received SETUP method to the request content analyzing unit 12.
In step 620, the request content analysis unit 12 receives the request content from the reception unit 11, the request content analysis unit 12 determines that it is a SETUP method, and sends a SETUP method receipt notification to the transmission unit 14.
In step 621, the transmission unit 14 receives a SETUP method reception notification from the request content analysis unit 12, and the transmission unit 14 transmits the SETUP method reception notification to the playback terminal 20 via the network 30 using the RTSP protocol.

In step 622, the receiving unit 24 of the playback terminal 20 receives the SETUP method reception notification transmitted from the distribution server 10 via the network 30, and the receiving unit 24 sends the SETUP method reception notification to the playback control unit 22.
In step 623, upon receiving the SETUP method receipt notification from the receiving unit 24, the playback control unit 22 refers to the file required for playback received in step 609 and sets the initial value of the gaze area (20, 50, 120, 130). Are associated with the main encoded video data ID, and the navigation encoded video data ID, the main encoded video data identification ID, and the navigation encoded video data identification ID are referenced. -Send the following extended PLAY method (example 1) in which [{reproduction end time}] and X-ViewID are further described to the transmission unit 23. Also, the gaze area information (20, 50, 120, 130) is sent to the decoding unit 25.

(1) Example 1 of extended PLAY method for partial designated distribution request
PLAY rtsp: //xxx.xxx.xxx.xxx/xxxx RTSP / 1.0
CSeq: 6
Date: Wed, 24 Dec 2008 02:02:40 GMT
Session: 1234567890
Range: 0-26633
X-ViewID: 0,1,5,6,1000,100,101
From the gaze area initial value (20, 50, 120, 130), the main encoded video data ID is 0, 1, 5, 6. 1000 is a navigation encoded video data ID, 100 is a main encoded video data identification ID, and 101 is a navigation encoded video data identification ID. In this embodiment, the initial value of the gaze area is (20, 50, 120, 130), but this value is not necessarily required.
In step 624, the transmission unit 23 transmits the extended PLAY method to the distribution server 10 via the network 30 using the RTSP protocol.

In step 625, the receiving unit 11 of the distribution server 10 receives the extended PLAY method from the playback terminal 20 via the network 30, and the receiving unit 11 sends the received extended PLAY method to the request content analyzing unit 12.
In step 626, the request content analysis unit 12 receives the extended PLAY method from the reception unit 11, analyzes the received extended PLAY method, specifies a part from X-ViewID, and receives video, audio (even if there is no audio) from Range. It is determined that the request is a delivery request from the head (0 second), and the analysis result and information described in the extended PLAY method are sent to the reproduction data storage unit 13 together.
In step 627, when the reproduction data storage unit 13 receives the analysis result of the request from the head (0 second) by partial designation from the request content analysis unit 12, the requested main encoded video data (ViewID: 0, 1) is received. 5, 6), the entire navigation encoded video data (1000), audio encoded data (there may be no audio) is read from the head (0 seconds), and the read main encoded video data (ViewID: 0, 1) , 5, 6), the entire navigation encoded video data and audio encoded data (there may be no audio) are made into one encoded data. Further, first, ViewID information (ViewID: 0, 1, 5, 6, 1000) describing where the read video is is transmitted to the transmission unit 14, and then encoded data for 1 GOP is transmitted. The data is sent to the transmission unit 14, and thereafter, the ViewID information and the encoded data for 1 GOP are sequentially sent to the transmission unit 14.
In step 628, the transmission unit 14 receives the ViewID information from the reproduction data storage unit 13 in the order of the encoded data for 1 GOP, and sequentially reproduces the reproduction terminal 20 via the network 30 in the order of the ViewID information and the encoded data for 1 GOP. Send to.

In step 629, the receiving unit 24 of the playback terminal 20 sequentially receives and receives ViewID information and 1 GOP encoded data transmitted from the distribution server 10 in the order of ViewID information and 1 GOP encoded data via the network 30. The ViewID information and 1 GOP encoded data are sequentially sent to the decoding unit 25.
In step 630, the decoding unit 25 sequentially receives ViewID information and encoded data for one GOP from the receiving unit 24, and the decoding unit 25 compares the ViewID described in the ViewID information with the ViewID being decoded for each GOP. If the ViewID is the same, the decryption is performed as it is. A range of gaze area information (200, 500, 1200, 1300) is cut out from the decoded main video (ViewID: 0, 1, 5, 6), and the cut out gaze area video (200, 500, 1200, 1300) is cut out. Then, the entire decoded navigation video and audio (there may be no audio) are sent to the display unit 26.
In step 631, the display unit 26 of the playback terminal 20 receives the gaze area video, the entire navigation video, and the audio (there may be no audio) cut out from the decoding unit 25 of the playback terminal 20, and receives the gaze area video and the entire navigation video. , Start stream playback of audio (there may be no audio).

FIGS. 7A and 7B are processing procedures when the gaze area newly selected from the gaze area video during the stream reproduction is reproduced with continuous reproduction time in the video distribution system according to the embodiment of the present invention. It is a flowchart which shows.
In step 701, when the user newly selects another area from the navigation video while the gaze area video, the entire navigation video, and audio (there may be no audio) are stream-reproduced on the display unit 26, the playback request unit 21 For example, 280, 80, 60, and 130 of the newly selected gaze area shown in FIG. Reference numerals 280, 80, 60, and 130 represent the distance (X, Y), height, and width of the gaze area from the upper left of the navigation video 26-1. In this embodiment, they are 280, 80, 60, and 130, but this value is not necessarily required.
In step 702, the reproduction control unit 22 receives gaze area information of distance (X, Y), height, and width from the reproduction request unit 21, and the reproduction control unit 22 gazes the received 280, 80, 60, and 130. The area information and the file necessary for reproduction received in step 609 are referred to, the main encoded video data ID is associated, and the navigation encoded video data ID, the main encoded video data identification ID, and the navigation encoding are associated. Refer to the video data identification ID, describe X-ViewID, and do not describe both the reproduction start time and the reproduction end time in Range (Example 2), or do not describe [{reproduction start time}] in Range ( Ex. 3) Or, the entire extended PLAY method is not used (Example 4) without describing the entire line of “[Range:” SP [{Playback start time}]-[{Playback end time}] CRLF] of Range. Playback terminal 20 to the transmission unit 23. Further, the reproduction control unit 22 sends gaze area information (280, 80, 60, 130) to the decoding unit 25.
In step 703, the transmission unit 23 transmits the extended PLAY method received from the reproduction control unit 22 to the distribution server 10 via the network 30 using the RTSP protocol.

(2) Playback time continuation partial designation delivery request extended PLAY method example 2 of the present invention
PLAY rtsp: //xxx.xxx.xxx.xxx/xxxx RTSP / 1.0
CSeq: 8
Date: Wed, 24 Dec 2008 02:03:12 GMT
Session: 1234567890
Range:
X-ViewID: 2,3,4,7,8,9,1000,100,101
(3) Reproduction time continuation partial designation distribution request extended PLAY method example 3 of the present invention
PLAY rtsp: //xxx.xxx.xxx.xxx/xxxx RTSP / 1.0
CSeq: 8
Date: Wed, 24 Dec 2008 02:03:12 GMT
Session: 1234567890
Range: -26633
X-ViewID: 2,3,4,7,8,9,1000,100,101
(4) Reproduction time continuation partial designation distribution request extended PLAY method example 4 of the present invention
PLAY rtsp: //xxx.xxx.xxx.xxx/xxxx RTSP / 1.0
CSeq: 8
Date: Wed, 24 Dec 2008 02:03:12 GMT
Session: 1234567890
X-ViewID: 2,3,4,7,8,9,1000,100,101
From the selected gaze area (280, 80, 60, 130), the main encoded video data ID is (2, 3, 4, 7, 8, 9). 1000 is a navigation encoded video data ID, 100 is a main encoded video data identification ID, and 101 is a navigation encoded video data identification ID.

In step 704, the receiving unit 11 of the distribution server 10 receives the extended PLAY method from the playback terminal 20 via the network 30, and the receiving unit 11 sends the received extended PLAY method to the request content analyzing unit 12.
In step 705, the request content analysis unit 12 receives the extended PLAY method from the reception unit 11, analyzes the received extended PLAY method, specifies a part from the X-ViewID, and specifies the playback start time (or the entire range line) in the range. Since there is no description, it is determined that the encoded data distribution request is partially specified from the next GOP, and the analysis result and the information described in the extended PLAY method are sent to the reproduction data storage unit 13 together.
In step 706, when the reproduction data storage unit 13 receives the analysis result of the encoded data distribution request partially specified from the next GOP from the request content analysis unit 12, the currently encoded main encoded video data (ViewID: 0, 1, 5, 6), the entire navigation encoded video data (1000), and audio encoded data (there may be no audio) are continuously read out, and the head of the next GOP (9.5 seconds) ) The main encoded video data requested by (ViewID: 2, 3, 4, 7, 8, 9), the entire navigation encoded video data (1000), and audio encoded data (there may be no audio). read out.
The read partial designated main encoded video data (ViewID: 2, 3, 4, 7, 8, 9), the entire navigation encoded video data (1000), and audio encoded data (there may be no audio) As shown in FIG. 5, first, ViewID information (ViewID: 2, 3, 4, 7, 8, 9, 1000) describing where the read video is is encoded. Then, the encoded data for 1 GOP is transmitted to the transmitting unit 14, and thereafter, the ViewID information and the encoded data for 1 GOP are sequentially transmitted to the transmitting unit 14.
In step 707, the transmission unit 14 receives the ViewID information from the reproduction data storage unit 13 in the order of the encoded data for 1 GOP, and sequentially reproduces the reproduction terminal 20 via the network 30 in the order of the ViewID information and the encoded data for 1 GOP. Send to.

In step 708, the receiving unit 24 of the playback terminal 20 sequentially receives and receives ViewID information and 1 GOP encoded data transmitted from the distribution server 10 in the order of ViewID information and 1 GOP encoded data via the network 30. The ViewID information and 1 GOP encoded data are sequentially sent to the decoding unit 25.
In step 709, the decoding unit 25 sequentially receives ViewID information and 1-GOP encoded data from the receiving unit 24, and the decoding unit 25 compares the ViewID described in the ViewID information with the ViewID being decoded for each 1 GOP. At different times, the ViewID is updated and decrypted. A range of gaze area information (2800, 800, 600, 1300) is cut out from the decoded main video (ViewID: 2, 3, 4, 7, 8, 9), and the gaze area video (2800, 800, 600, 1300) and the entire decoded navigation video and audio (there may be no audio) is sent to the display unit 26.
In step 710, the display unit 26 receives the gaze area video (2800, 800, 600, 1300) cut out from the decoding unit 25, the entire navigation video, and audio (there may be no audio), and is currently watching the stream being played back. The area video (200, 500, 1200, 1300), the entire navigation video, and audio (there may be no audio) are reproduced, and the gaze area video (2800) newly requested from the head of the next GOP (9.5 seconds) , 800, 600, 1300), the entire navigation video, and audio (sound may be absent) stream playback. As a result, it is possible to execute video playback with a continuous playback time.

In step 711, when the user inputs a playback stop to the playback request unit 21, the playback request unit 21 sends the input playback stop to the playback control unit 22.
In step 712, upon receiving a playback stop from the playback request unit 21, the playback control unit 22 sends a playback stop to the decoding unit 25. In addition, a transmission request to stop the encoded data distribution is sent to the transmission unit 23 to the distribution server 10.
In step 713, when receiving the playback stop, the decoding unit 25 stops the decoding, and further, the decoding unit 25 sends a playback stop to the display unit 26.
In step 714, when the display unit 26 receives the reproduction stop from the decoding unit 25, the display unit 26 stops the stream reproduction.
In step 715, the transmission unit 23 of the playback terminal 20 transmits the encoded data distribution stop to the distribution server 10.
In step 716, the distribution server 10 stops the encoded data distribution.

As described above, in the present embodiment, in the partial distribution of the video distribution system, the newly requested gaze area video / audio reproduction in which the reproduction time has continued from the gaze area video / audio during the stream reproduction can be performed.
In the above description, the distribution server 10 and the reproduction terminal 20 can be executed by a computer. In that case, the reproduction time continuous reproduction method, the video distribution request method, the video distribution method, and the video reproduction according to the present invention. The method is performed by causing a computer to execute a program stored in a hard disk or the like in the computer. This program is supplied by downloading via a CD-ROM or a network.
As mentioned above, the invention made by the present inventor has been specifically described based on the above embodiments. However, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the invention. Of course.

DESCRIPTION OF SYMBOLS 10 Distribution server 11, 24 Reception part 12 Request content analysis part 13 Reproduction | regeneration data preservation | save part 14, 23 Transmission part 20 Reproduction terminal 21 Reproduction request part 22 Reproduction control part 25 Decoding part 26 Display part 26-1 Navigation image | video 26-2 Gaze area Video 30 network

Claims (11)

In a video distribution system in which a playback terminal and a distribution server are connected via a network, a playback time continuous playback method for generating a partially specified video by continuing playback time,
The distribution server stores encoded data,
The playback terminal transmits an encoded data distribution request corresponding to the selected gaze area to the distribution server via the network,
The distribution server continuously reads the encoded data currently being read from the distribution request contents of the playback terminal, and encodes data corresponding to the newly requested gaze area from the beginning of the next GOP. First, identification information for identifying where the read encoded data is in the video, and then sequentially distributed to the playback terminal via the network in the order of 1 GOP encoded data. ,
The playback terminal sequentially receives the identification information and encoded data for 1 GOP from the distribution server, compares the identification information with the identification information being decoded for each GOP, and Update and decrypt the identity,
A playback time continuous playback method, wherein the playback terminal performs stream playback of a gaze area video newly requested from the head of the next GOP. In a video distribution system in which a playback terminal and a distribution server are connected via a network, a video distribution request method in a playback time continuous playback method for generating a partially specified video by continuing playback time,
The playback terminal includes a playback request unit;
A playback control unit;
A transmission unit;
A decoding unit,
The reproduction request unit sends gaze area information that selects an area to be viewed in whole or in part from the navigation video during stream reproduction to the reproduction control unit,
The reproduction control unit sends a distribution request to which information for identifying which part of the video is given based on the gaze area information received from the reproduction request unit to the transmission unit, and further, the reproduction request Sending the gaze area information received from the unit to the decoding unit,
The video distribution request method, wherein the transmission unit transmits the distribution request to the distribution server via the network. In a video distribution system in which a playback terminal and a distribution server are connected via a network, a video distribution method in a playback time continuous playback method for generating a partially specified video by continuing playback time,
The distribution server includes a receiving unit,
A request content analysis unit;
A playback data storage unit;
A transmission unit,
The receiving unit sends a distribution request to which information for identifying which part of the video received from the playback terminal via the network is given to the request content analyzing unit,
The request content analysis unit analyzes the distribution request received from the reception unit, determines that the encoded data distribution request is partially designated from the next GOP, and sends the analysis result and the distribution request to the reproduction data storage unit. Send the information that is listed,
The reproduction data storage unit receives the analysis result of the encoded data distribution request partially specified from the next GOP from the request content analysis unit, and the main encoded data and navigation encoded data currently being read are continued as they are. Read out and read out the newly requested main encoded data and navigation encoded data of the newly requested part from the head of the next GOP. First, identification information for identifying where the read video is is Sent to the transmitter, and then sends 1 GOP of encoded data to the transmitter, and then sequentially sends the identification information and 1 GOP of encoded data to the transmitter in order.
The video delivery method, wherein the transmission unit sequentially transmits the identification information and encoded data for 1 GOP to the playback terminal via a network. In a video distribution system in which a playback terminal and a distribution server are connected via a network, a video playback method in a playback time continuous playback method for generating a partially specified video by continuing playback time,
The playback terminal
A receiver,
A decryption unit;
A display unit,
The reception unit sequentially receives identification information for identifying which part of the video is received from the distribution server via the network, encoded data for 1 GOP, sequentially to the decoding unit,
For each GOP, the decoding unit compares the identification information with the identification information being decoded, and when different, updates the identification information, decodes, and reads gaze area information from the decoded main video. Cut out the range, and sent the gaze area video and the navigation video to the display unit,
The video playback method, wherein the display unit receives the gaze area video and the navigation video, and performs stream playback of the newly requested gaze area video and navigation video from the head of the next GOP. A video distribution system in which a playback terminal and a distribution server are connected via a network,
The playback terminal includes a display unit that performs stream playback of a gaze area video and a navigation video;
A playback request section;
A playback control unit;
A transmission unit;
A decoding unit,
The playback request unit sends gaze area information that selects a region to be viewed in whole or in part from the navigation video during stream playback to the playback control unit,
The reproduction control unit sends a distribution request to which information for identifying which part of the video is given based on the gaze area information received from the reproduction request unit to the transmission unit, and further, the reproduction request Sending the gaze area information received from the unit to the decoding unit,
The pre-transmission unit transmits the distribution request to the distribution server via the network. A video distribution system in which a playback terminal and a distribution server are connected via a network,
The distribution server receives from the playback terminal via the network a distribution request to which information for identifying which part of the video is attached,
A request content analysis unit;
A playback data storage unit;
A transmission unit,
The receiving unit sends the distribution request received from the playback terminal to the request content analyzing unit,
The request content analysis unit analyzes the distribution request received from the reception unit, determines that the encoded data distribution request is partially designated from the next GOP, and sends the analysis result and the distribution request to the reproduction data storage unit. Send the information that is listed,
The reproduction data storage unit receives the analysis result of the encoded data distribution request partially specified from the next GOP from the request content analysis unit, and the main encoded data and navigation encoded data currently being read are continued as they are. Read out and read out the newly requested main encoded data and navigation encoded data of the newly requested part from the head of the next GOP. First, identification information for identifying where the read video is is Sent to the transmitter, and then sends 1 GOP of encoded data to the transmitter, and then sequentially sends the identification information and 1 GOP of encoded data to the transmitter in order.
The video delivery system, wherein the transmission unit sequentially transmits the identification information and encoded data for 1 GOP to the playback terminal via a network. A video distribution system in which a playback terminal and a distribution server are connected via a network,
The playback terminal, from the distribution server via the network, identification information for identifying which part of the video, a receiving unit that sequentially receives encoded data for 1 GOP,
A decryption unit;
A display unit,
The receiving unit sequentially sends the identification information and 1 GOP encoded data sequentially received from the distribution server to the decoding unit,
The decoding unit compares the identification information with the identification information being decoded for each GOP, updates the identification information when they are different from each other, decodes and decodes the gaze area information from the decoded main video Cut out the range, and sent the gaze area video and the navigation video to the display unit,
The video distribution system, wherein the display unit receives the gaze area video and the navigation video, and performs stream playback of the newly requested gaze area video and navigation video from the top of the next GOP.   The program for making a computer perform the process of the reproduction | regeneration terminal and the process of a delivery server in the reproduction | regeneration time continuous reproduction | regeneration method of Claim 1.   A program for causing a computer to execute the video distribution request method according to claim 2.   A program for causing a computer to execute the video distribution method according to claim 3.   A program for causing a computer to execute the video reproduction method according to claim 4.

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