JP2016213709A - Moving image reproduction system, client device, server device, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technology for continuously reproducing a plurality of moving image content each having a different reproduction enabling time.SOLUTION: A database part 107 is configured to record moving image segments corresponding to linear type and non-linear type services on the same time axis. A client device 20 is configured to store a play list for reproducing the moving image segments acquired from the database part 107. A reproduction program transmission part 118 is configured to, when receiving a transmission request of a reproduction program designating a reproduction position from the client device 20, transmit the reproduction program for reproducing the moving image segments arranged in a predetermined period including the reproduction position on the time axis. The client device is configured to update the play list on the basis of the reproduction program, and to reproduce the moving image segments in accordance with the play list.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a technique for reproducing a plurality of moving image contents having different reproducible times.

  Video distribution services via networks are widely provided. In this moving image distribution service, technologies for controlling a moving image to be viewed by a user of a client device on the server side are disclosed in Patent Documents 1 and 2. In Patent Literature 1, a distribution server distributes, to a user terminal, a management program that defines an advertisement insertion time or an advertisement insertion frame of a moving image program file and a moving image advertisement file to be reproduced, which are associated with each moving image program file. It is described. Based on the management program, the user terminal recognizes the advertisement insertion time or the advertisement insertion frame and the moving image advertisement file, and reproduces the moving image program file and the moving image advertisement file.

  Patent Document 2 describes that a Web server for providing information provides a script for controlling video transfer of a plurality of VOD (Video On Demand) servers with a menu screen attached thereto. Patent Document 2 describes that a video to be played can be designated and changed using a script selected by a user's operation on a menu screen. This script describes information such as the server name, file name, video start point, video end store, etc. According to the technique described in Patent Document 2, a plurality of VOD servers are linked together to continuously Video can be provided.

Japanese Patent Laid-Open No. 2003-244677 JP-A-10-136335

The moving image distribution service includes a linear type service that distributes moving image content according to a program guide and a non-linear type service that distributes moving image content when a viewer wants to watch it. The linear type service further includes a service such as an original service for broadcasting a program produced by the service provider and a retransmission service such as terrestrial digital broadcasting. Non-linear services further include services such as VOD and download (podcast, etc.). In a client device used by a user to view a moving image, it is common to perform control for reproducing the moving image independently for each moving image distribution service. For this reason, when a user of a client device switches from a live video that can be played back at a time specified in the program guide to a VOD video that can be played back at any time, the user of the service for viewing the live video An operation for temporarily ending the use and starting the use of the service for viewing the video of the VOD must be performed.
On the other hand, an object of the present invention is to provide a technique for continuously reproducing a plurality of moving image contents having different reproducible times.

  In order to solve the above-described problem, the video playback system of the present invention includes a video segment that constitutes a first video content that is played back at a specific time, and a video segment that constitutes a second video content that is played back at a time other than the specific time. Are recorded on the same time axis, and a client device that reproduces a video segment using the database unit, wherein the client device has a position on the time axis. Based on the received operation, an accepting unit that accepts an instructing operation acquires a video segment at a reproducible time from the database unit according to the instructed position on the time axis, and plays the acquired video segment A moving image playback unit.

  In the moving image reproduction system of the present invention, the server further includes a server device that distributes a program used for updating a playlist for reproducing a plurality of moving image segments recorded on the same time axis to the client device, the server The apparatus includes a request receiving unit that receives a transmission request for the program designating the position from the client apparatus, and a predetermined period including the position on the time axis based on the received transmission request. A program transmission unit that transmits the program for reproducing the arranged video segments, and the client device transmits the transmission request to the server device based on the operation; and the program Program reception for receiving the program transmitted by the transmission unit And a playlist update unit that updates the playlist listing the video segments arranged within the period based on the received program, and the video playback unit is configured to update the database unit according to the playlist. A video segment at a reproducible time may be acquired from the video, and the acquired video segment may be played back.

  In the moving image reproduction system of the present invention, the program transmission unit may transmit at least a part of the moving image segment constituting the second moving image content as a moving image segment corresponding to the client device.

  In the video playback system of the present invention, the playlist update unit receives the operation to change the position within the period after updating the playlist based on the program corresponding to the one period. In this case, the playlist may be updated without using the new program.

  In the moving image reproduction system of the present invention, the program transmission unit may change the period according to a history of the operation for changing the position.

  The client device of the present invention records the video segment constituting the first video content to be played back at a specific time and the video segment constituting the second video content to be played at a time other than the specific time on the same time axis. When playing back a video segment using the database unit, a receiving unit that receives an operation for instructing a position on the time axis, and based on the received position on the time axis based on the received operation A moving image reproducing unit that acquires a moving image segment at a reproducible time from the database unit and reproduces the acquired moving image segment;

  The server device of the present invention is a server device that distributes a program used for updating a playlist for reproducing a plurality of moving image segments recorded on the same time axis to the above-described client device, the client device A request receiving unit that receives a transmission request for the program designating the position from a device, and a moving image segment arranged within a predetermined period including the position on the time axis based on the received transmission request A program transmission unit for transmitting the program for reproduction.

  According to the program of the present invention, the same video segment that constitutes the first video content to be played back at a specific time and the video segment that constitutes the second video content to be played at a time other than the specific time are stored in the computer of the client device. When playing back a video segment using the database unit recorded on the time axis, a step of accepting an operation for instructing a position on the time axis, and on the time axis instructed based on the accepted operation Is a program for acquiring a moving image segment at a reproducible time from the database unit according to the position and reproducing the acquired moving image segment.

  Another program of the present invention provides a computer used for updating a playlist for reproducing a plurality of moving image segments recorded on the same time axis to a computer of a server device that distributes the program to the client device having the above configuration. Receiving a transmission request for the program designating the position from the client device, and playing back a video segment arranged within a predetermined period including the position on the time axis based on the received transmission request Transmitting the program for performing the program.

  According to the present invention, it is possible to provide a technique for continuously playing a plurality of moving image contents having different playable times.

The figure which shows the whole structure of the moving image reproduction system which concerns on one Embodiment of this invention. The block diagram which shows the hardware constitutions of the server apparatus which concerns on the same embodiment. FIG. 2 is a block diagram showing a hardware configuration of the client device according to the embodiment. The block diagram which shows the function structure of the server apparatus which concerns on the same embodiment. FIG. 2 is an exemplary block diagram illustrating a functional configuration of the client device according to the embodiment. Explanatory drawing of the detail of the video segment which concerns on the embodiment. Explanatory drawing of the data accumulate | stored in the database part which concerns on the embodiment. The block diagram which shows the function structure of the moving image replacement part which concerns on the same embodiment. Explanatory drawing of the replacement process which concerns on the same embodiment. The figure which shows the specific example of the reproduction | regeneration program which concerns on the embodiment (linear type). The figure which shows the part following FIG. 10A of a reproduction | regeneration program. The figure which shows the specific example of the reproduction | regeneration program which concerns on the embodiment (nonlinear type). The figure which shows the part following FIG. 11A of a reproduction | regeneration program. The sequence diagram which shows the process regarding the moving image reproduction performed with the moving image reproduction system which concerns on the same embodiment. The sequence diagram which shows the process following FIG. Explanatory drawing of the process regarding the moving image reproduction concerning the embodiment. Explanatory drawing of the process regarding the moving image reproduction concerning the embodiment. Explanatory drawing of the process regarding the moving image reproduction concerning the embodiment. The figure which shows the specific example of the reproduction | regeneration program which concerns on the modification 1 of this invention. The figure which shows the other specific example of the reproduction | regeneration program which concerns on the modification. The block diagram which shows the function structure of the server apparatus which concerns on the modification 2 of this invention. Explanatory drawing of the specific method of the reproduction | regeneration object period which concerns on the modification. The block diagram which shows the function structure of the moving image insertion part which concerns on the modification 3 of this invention. Explanatory drawing of the insertion process which concerns on the modification.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram showing an overall configuration of a moving image playback system 1 according to an embodiment of the present invention. As shown in FIG. 1, the moving image playback system 1 includes a server device 10 and a plurality of client devices 20. Each of the server device 10 and the plurality of client devices 20 is connected to the network 100. The network 100 is a communication line including the Internet and a mobile communication network, for example.

  The server device 10 is a server device managed and operated by a video distribution service provider. The server device 10 distributes moving image content to each of the plurality of client devices 20 via the network 100 using an HTTP live streaming (HLS) protocol. In the distribution of moving image content using HLS, a moving image segment obtained by dividing moving image content of a plurality of frames continuous on the time axis indicating time along the time axis is distributed. The time axis is a time axis for designating the date and time in the present embodiment. In this embodiment, the moving image segment is filed in the TS (Transport Stream) format. In this embodiment, the time length of one moving image segment is about 3 seconds.

  In addition, the server device 10 distributes moving image content using linear and non-linear services. The linear-type service is a service that distributes a live moving image (corresponding to the first moving image content of the present invention) that is played back at a specific time specified in the program guide. In the linear service of the present embodiment, the time for reproducing the moving image content is specified by the broadcast date and time. The non-linear service is a service that distributes moving image content (corresponding to the second moving image content of the present invention) that is played back at a specific time specified in the program guide, such as moving image content distributed in the past. It is. In the non-linear type service of this embodiment, the time for reproducing the moving image content is specified by the date and time later than the broadcast date and time. This moving image content corresponds to VOD moving image content in the present embodiment.

  The client device 20 is used by a user who views a moving image using a moving image distribution service. The client device 20 is a smartphone in the present embodiment, but may be a device such as a feature phone, a tablet computer, a notebook computer, or a wearable computer (for example, a head mounted display).

FIG. 2 is a diagram illustrating a hardware configuration of the server device 10. As illustrated in FIG. 2, the server device 10 includes a control unit 11, a communication unit 12, and a storage unit 13.
The control unit 11 includes a processor including a CPU as an arithmetic processing unit, a memory including a ROM (Read Only Memory), and a RAM (Random Access Memory). The CPU controls each unit of the server device 10 by reading the program stored in the ROM or the storage unit 13 into the RAM and executing it. In addition to this, the control unit 11 includes an image processing circuit exemplified by an ASIC (Application Specific Integrated Circuit) or an FPGA (Field-Programmable Gate Array).

The communication unit 12 is an interface that is connected to the network 100 and transmits / receives data to / from an external device. The storage unit 13 includes a hard disk device, for example, and is a storage device that stores a server application 131 executed by the control unit 11 and data for providing a moving image distribution service.
In the present embodiment, the server device 10 includes the storage unit 13, but a storage device corresponding to the storage unit 13 may be provided outside the server device 10.

FIG. 3 is a diagram illustrating a hardware configuration of the client device 20. As illustrated in FIG. 3, the client device 20 includes a control unit 21, a communication unit 22, a touch screen unit 23, an audio processing unit 24, and a storage unit 25.
The control unit 21 includes a processor including a CPU as a processing unit, a memory including a ROM, and a RAM. The CPU controls each unit of the client device 20 by reading the program stored in the ROM or the storage unit 25 into the RAM and executing it.

  Further, the control unit 21 has a function of reproducing moving image content using HLS. The playlist PL is a playlist for reproducing moving image content using HLS. The playlist PL is a list (also referred to as a playback list) in which the operation segments to be played are listed in the order of playback. The details will be described later.

The communication unit 22 includes, for example, a wireless communication circuit and an antenna, and is connected to the network 100 to transmit / receive data to / from an external device.
The touch screen unit 23 includes a display unit that displays an image and a touch sensor that receives a user operation. The display unit is a liquid crystal display, for example, and displays various images in the display area. The touch sensor is a sensor provided in a planar shape on the display area of the display unit, and a user operation performed on the display area is performed according to a predetermined method (for example, a resistance film method or a capacitance method). Detect.
The audio processing unit 24 includes, for example, a signal processing circuit such as a DSP (Digital Signal Processor), a microphone, and a speaker, and manages audio processing in the client device 20.

  The storage unit 25 is a storage device such as an EEPROM (Electronically Erasable and Programmable ROM) or a flash memory, and stores client applications 251 executed by the control unit 21, user attribute information, and other data for using the video distribution service. Remember. The user attribute information is information indicating the user's attribute, for example, the user's age. The user attribute information is set in advance for the user, for example.

FIG. 4 is a block diagram illustrating a functional configuration of the server device 10. FIG. 5 is a block diagram illustrating a functional configuration of the client device 20. The control unit 11 of the server device 10 implements each function illustrated in FIG. 4 by executing the server application 131. The control unit 21 of the client device 20 implements each function illustrated in FIG. 5 by executing the client application 251.
First, the functional configuration of the server device 10 will be described. The server apparatus 10 receives TS packets from an external apparatus. Some TS packets are packetized elementary streams. This TS packet includes video data and audio data representing the main program and CM of the program. The video data and audio data are encoded in a PES (Packetized Elementary Stream) format. Some TS packets describe information such as PSI (Program Specific Information) and EPG (Electronic Program Guide), which are program specific information, in a section format table.

  The capture unit 101 captures an elementary stream based on the input PES format TS packet, and generates a TS file in which the TS packet is filed. For example, the capture unit 101 captures an elementary stream for one hour each time.

The date / time information acquisition unit 102 acquires date / time information based on the input section-format TS packet. This date / time information is information called a TOT (Time Offset Table) and indicates the broadcast date / time of video data and audio data. The date information acquisition unit 102 supplies the acquired date information to each of the capture unit 101 and the linear moving image recording unit 106.
The capture unit 101 stores the TS file in the TS file storage unit 103. As information indicating the time included in the TS file, in addition to the date and time information (TOT) indicating the broadcast date and time, three types of playback time stamps (PTS: Presentation Time Stamp, PCR: Program Clock Reference and DTS (Decode Time Stamp) are included on the broadcasting station side. The “reproduction time stamp” described below is a general term for these three types of reproduction time stamps.
In addition, the capture unit 101 supplies a transport stream including input TS packets in the PES format to the encoder 104.

The encoder 104 converts the video data into the H.264 format based on the transport stream supplied from the capture unit 101. The audio data is encoded into the AAC format in the H.264 format and supplied to the moving image segment generation unit 105.
The video segment generation unit 105 generates a video segment based on the encoded transport stream supplied from the encoder 104.

  The linear moving image recording unit 106 records the moving image segments belonging to the linear segment group among the moving image segments generated by the moving image segment generating unit 105 in the database unit 107 in association with the segment information specified for each moving image segment. To do. In this embodiment, the linear segment group is a group to which a moving image segment distributed by the linear service belongs. As shown in FIG. 6, the linear segment group is composed of moving image segments whose broadcast date and time are from two hours before the current date and time to the current date and time. The moving image segment indicated by the hatched portion in FIG. 6 constitutes a live moving image.

  FIG. 7A is a diagram showing segment information recorded in the database unit 107 and corresponding to the linear service. The segment information corresponds to the segment file path for uniquely identifying the video segment, the station ID for identifying the broadcast station, the date / time information indicating the broadcast date / time, the time length, and the information of the main part / CM for each video segment Information. Here, the station ID is only one type of “ATV”. The date information is recorded based on the date information acquired by the date information acquisition unit 102. The moving image segment belonging to the linear segment group is not distinguished from the main part and the CM, and is represented by “−” (hyphen) in FIG. In addition, the video segments belonging to the linear segment group are assumed to have a constant time length of 3.0 seconds.

  The program information acquisition unit 108 acquires program information based on the input section-format TS packet. The program information is information related to the main part of the program, and includes information such as a broadcasting station, a program name, a program summary, a broadcasting date and time, and a thumbnail. The program information acquisition unit 108 records the program information in the database unit 107 in association with the moving image segment.

  The moving image replacement unit 109 performs replacement processing for replacing a moving image segment belonging to a non-linear segment group. In the present embodiment, the moving image replacement unit 109 detects the main part and CM of the program based on the TS file acquired from the TS file storage unit 103, and replaces the detected CM.

  The non-linear segment group is a group to which a video segment distributed by a non-linear service belongs. As shown in FIG. 6, the non-linear segment group is composed of moving image segments whose broadcast date and time is from two weeks before to two hours before the current date and time.

FIG. 8 is a block diagram illustrating a functional configuration of the moving image replacement unit 109. As shown in FIG. 8, the moving image replacement unit 109 includes a pre-replacement moving image acquisition unit 1091, a replacement moving image acquisition unit 1092, a processing unit 1093, and a replacement moving image segment DB (Data Base) 1094. Prepare.
The pre-replacement video acquisition unit 1091 acquires the video segment before the replacement process from the video segment generation unit 105. The replacement video acquisition unit 1092 acquires a replacement video segment from the replacement video segment DB 1094. The replacement moving image segment DB 1094 records replacement moving image segments prepared in advance, for example, by being generated by another system. The processing unit 1093 processes the video segment before the replacement process based on the replacement video segment.
The replacement moving image segment DB 1094 may be provided outside the moving image replacement unit 109.

FIG. 9 is a diagram illustrating a specific example of the replacement process. FIG. 9A shows a moving image segment before replacement processing, and FIG. 9B shows a moving image segment for replacement constituting a 30-second CM.
The processing unit 1093 rewrites the reproduction time stamp of the replacement video segment based on the broadcast date and time (that is, the replacement position) at which the replacement video segment is arranged. The replacement position is specified by a service provider, for example. As shown in FIG. 9C, when the replacement position is “15:00:00”, the processing unit 1093 sets the playback time stamp of the first video segment of the replacement video segment to “15:00. 0:00 ", the playback time stamp of the last video segment is rewritten to" 15:00:30 ". The processing unit 1093 rewrites the reproduction time stamp in the same manner for the other replacement video segments. Then, the processing unit 1093 replaces the moving image segment before the replacement process with a replacement moving image segment having the same reproduction time stamp after the rewriting. Thereby, the moving image segment after the replacement process shown in FIG. 9D is obtained. The processing unit 1093 supplies the moving image segment after the replacement process to the non-linear moving image recording unit 110.

  The non-linear video recording unit 110 designates, for each video segment, a video segment belonging to the non-linear segment group or a video segment supplied from the video replacement unit 109 among the video segments generated by the video segment generation unit 105. It is recorded in the database unit 107 in association with the segment information.

  FIG. 7B is a diagram showing segment information recorded in the database unit 107 and corresponding to the non-linear service. As in the case of the linear service, the segment information includes, for each video segment, a segment file path that uniquely identifies the video segment, a station ID that identifies the broadcast station, date and time information indicating the broadcast date, time length, This is information in which main information / CM information is associated. However, the date / time information is recorded based on the date / time information notified from the date / time information acquisition unit 102 to the nonlinear moving image recording unit 110 via the capture unit 101, the encoder 104, and the moving image segment generation unit 105. For video segments belonging to the non-linear segment group, the main part and CM are distinguished. As a result, the time length of the moving image segment varies.

  The DB management unit 111 manages data recorded in the database unit 107. As shown in FIG. 6, the DB management unit 111 stores a video segment that has passed two hours or more from the broadcast date and time, segment information and program information related to the video segment belonging to the linear segment group, and a database unit 107. Delete from. Further, the DB management unit 111 deletes, from the database unit 107, the video segment that has passed two weeks or more from the broadcast date and time, the segment information and the program information related to the video segment belonging to the non-linear segment group.

The log information receiving unit 112 receives log information transmitted by the client device 20. The log information is information recorded by the client device 20, for example, the date and time (time zone) when the user viewed the broadcast station and the program or CM of the broadcast station, and the date and time (broadcast time) when the program or CM was broadcast. Including viewing record information and usage status information of the client application 251. The log information processing unit 113 records log information and performs log processing based on the log information. The log processing is processing using log information, and includes, for example, calculation of audience rating and analysis of usage status of the client application 251.
Note that the date and time (time) information included in the log information is derived from the TOT.

  The program guide generation unit 114 generates a program guide based on the program information stored in the database unit 107. The program guide transmission unit 115 transmits the program guide generated by the program guide generation unit 114 to the client device 20.

  The request reception unit 116 receives from the client device 20 a transmission request for requesting transmission of a reproduction program that designates a position on the time axis (hereinafter referred to as “reproduction position”). The reproduction program is, for example, a reproduction script and is a program used for updating the playlist PL.

  Based on the received transmission request, the reproduction program generation unit 117 generates a reproduction program for reproducing the moving image segments arranged within a predetermined period including the reproduction position (hereinafter referred to as “reproduction target period”). That is, the reproduction program generation unit 117 generates a reproduction program for reproducing the moving image segment associated with the date / time information within the reproduction target period in the database unit 107.

  The reproduction program transmission unit 118 transmits the reproduction program generated by the reproduction program generation unit 117 to the client device 20 (corresponding to the program transmission unit of the present invention).

  The moving image transmission unit 119 transmits the moving image segments stored in the database unit 107 to the client device 20. The moving image transmission unit 119 transmits a moving image segment for a live moving image in the linear service on the condition that the specific broadcasting date and time specified by the date and time information of the segment information has been reached. The moving image transmission unit 119 transmits the moving image segment at the timing requested by the client device 20 for the moving image content of the non-linear service regardless of the specific broadcast date and time specified by the date and time information of the segment information.

Next, the functional configuration of the client device 20 will be described with reference to FIG.
The accepting unit 201 accepts an operation for designating a reproduction position. The reproduction position includes, for example, information for specifying a broadcasting station and date and time. The accepting unit 201 may accept an operation in which the user inputs information on the reproduction position. This operation may not be an operation performed through the touch screen unit 23, but may be an operation performed through an operation unit other than the touch screen unit 23 such as a physical key, or an operation by voice input. .
The log information collection unit 202 collects log information based on the operation received by the reception unit 201. The log information transmission unit 203 transmits log information to the server device 10 based on the operation received by the reception unit 201.

  The program guide receiving unit 204 receives the program guide transmitted by the program guide transmitting unit 115 of the server device 10. The program guide display unit 205 displays the program guide received by the program guide receiver 204.

  The request transmission unit 206 transmits a transmission request to the server device 10 based on the operation received by the reception unit 201. The reproduction program receiving unit 207 receives the reproduction program transmitted by the reproduction program transmitting unit 118. This reproduction program is transmitted by the reproduction program transmission unit 118 in response to the transmission request.

  The playlist update unit 208 updates the playlist PL stored in the playlist storage unit 209 based on the playback program received by the playback program receiving unit 207. The playlist update unit 208 updates the playlist PL that lists the moving image segments arranged in the playback target period in the playback order. The playlist is an M3U8 format playlist used in the HLS, and is a list in which the playback order of the video segment, the segment file path of the video segment, and the time length of the video segment are associated with each other. .

  The video playback unit 210 is a video player that acquires a video segment of a broadcast date and time that can be played back from the database unit 107 using the HLS protocol, and plays back the acquired video content. As with the conventional video player, the video playback unit 210 repeatedly checks the playlist PL, for example, every predetermined period, and plays the video segment according to the playlist PL. The video playback unit 210 refers to the playlist PL, acquires the video segment indicated by the segment file path through communication with the server device 10, and plays back the acquired video segment in the order of playback. At this time, the moving image reproducing unit 210 controls the timing of reproducing each moving image segment based on the reproduction time stamp.

FIG. 10A and FIG. 10B are diagrams showing specific examples of the reproduction program corresponding to the linear service. FIG. 10B is a diagram showing a part of the playback program following FIG. 10A.
In FIG. 10A, a block ““ segment-info ”{...}” Is a block that defines a reproduction program. The block ““ target-app ”:“ IPTV-app ”” is a block that defines that the target application program is the client application 251 identified by “IPTV-app”. The block ““ ver ”:“ 0.1 ”” is a block that defines that the version of the reproduction program is “0.1”. A block ““ seg-type ”:“ linear ”” defines a linear type service. The block ““ live ”:“ true ”” is a block that defines that a moving image segment constitutes a live moving image. The block ““ station ”:“ ATV ”” is a block that defines that the station ID is “ATV”. The block ““ baseurl ”: https://aaabbb.com/” is a block that defines the base URL that the client device 20 should access. The block ““ base-duration ”:“ 3.0 ”” is a block that defines that the basic time length of the moving image segment is 3.0 seconds. A block ““ base-segment-file ”:“ segment-0100.ts ”” is a block that defines a segment file path of a reference video segment.

The block “Segments {...}” Is a block that defines the content related to playback control for each moving image segment. The first block in ““ Segments {...} ”Will be described. A block ““ file ”:“ segment-0000.ts ”” is a block that defines a segment file path of a moving image segment to be reproduced. The block ““ air-date ”:“ 20140602000700 ”” is a block that defines the broadcast date and time (on-air date and time) of the moving image segment. The block "" duration ":" 3.0 "" is a block that defines the time length of the moving image segment.
Although the description is omitted here, the contents related to playback control are also defined in the blocks corresponding to “segment-0001.ts” to “segment-0100.ts”.

FIG. 11A and FIG. 11B are diagrams showing specific examples of the reproduction program corresponding to the non-linear service. FIG. 11B is a diagram showing a part of the playback program following FIG. 11A.
In the playback program corresponding to the non-linear service, blocks that employ the same description as in FIGS. 10A and 10B are blocks that define the same content. However, a block ““ seg-type ”:“ nonlinear ”” defines a non-linear service. The block ““ live ”:“ false ”” is a block that defines that the moving image segment does not constitute a live moving image.

  Further, the block “Segments {...}” Is a block that defines the content related to playback control for each moving image segment. The playback program corresponding to the non-linear service further includes the following blocks. The block ““ seg-category ”:“ cm15 ”” is a block that defines that a moving image segment constitutes a 15-second CM. A block "" cmid ":" CM_ATV_A_20140526002000 "" is a block that defines identification information for uniquely identifying a CM to be reproduced. The block ““ seg-category ”:“ main ”” is a block that defines that the moving image segment constitutes the main part of the program.

FIG. 12 and FIG. 13 are sequence diagrams showing processing related to moving image playback executed by the moving image playback system 1. FIG. 14, FIG. 15 and FIG. 16 are diagrams for explaining processing relating to moving image reproduction.
The control part 11 of the server apparatus 10 produces | generates a program schedule (step S1). The control unit 11 transmits the generated program guide to the client device 20 via the communication unit 12 (step S2). When receiving the program guide via the communication unit 22 (step S3), the control unit 21 of the client device 20 displays the program guide using the touch screen unit 23 (step S4).

  Next, the control unit 21 receives an operation for instructing the reproduction position via the touch screen unit 23 (step S5). For example, the control unit 21 uses the program guide displayed on the touch screen unit 23 to receive an operation for instructing the reproduction position. Here, it is assumed that the playback position is specified as the current date and time, and playback of a live video distributed by the linear service is instructed.

  Next, the control unit 21 transmits a transmission request including the reproduction position to the server device 10 via the communication unit 22 (step S6). This transmission request may include information for uniquely identifying a program, or information for designating a broadcast station and broadcast date and time. The control part 11 of the server apparatus 10 receives a transmission request via the communication part 12 (step S7). Based on the received transmission request, the control unit 11 generates a reproduction program for reproducing the moving image segment arranged in the reproduction target period including the designated reproduction position (step S8). As shown in FIG. 14A, when the playback position is T, the control unit 11 performs a period of 5 minutes before and after the playback position T, that is, a period of T-5: 00 to T + 5.00. As specified. In this case, the control unit 11 generates the reproduction program described with reference to FIGS. 10A and 10B.

  Next, the control unit 11 transmits the generated reproduction program to the client device 20 via the communication unit 12 (step S9). The control unit 21 of the client device 20 receives this reproduction program via the communication unit 22 (step S10). Next, the control unit 21 updates the playlist PL based on the received reproduction program (step S11). Here, as shown in FIG. 10B, the control unit 21 sets the playback order of the moving image segment whose segment file path is “segment-0100.ts” specified by “base-segment” of the playback program to “ 1 ”. Furthermore, the control unit 21 follows the order of broadcast date and time in the order of “segment-0101.ts”, “segment-0102.ts”,... “Segment-0198.ts”, “segment-0199.ts”. Update to playlist PL listing the video segments.

Next, the control unit 21 obtains a reproducible video segment of the broadcast date and time from the database unit 107 according to the playlist PL, and reproduces the acquired video segment (step S12).
In step S <b> 12, the control unit 21 transmits a moving image acquisition request designating a segment file path included in the playlist PL to the server device 10. When the control unit 11 of the server apparatus 10 receives the video acquisition request via the communication unit 12, the control unit 11 acquires the video segment of the segment file path specified by the video acquisition request from the database unit 107, and the client via the communication unit 12 It transmits to the apparatus 20 (step S13). When the control unit 21 of the client device 20 acquires (receives) the moving image segment via the communication unit 22, it temporarily stores (buffers) it and reproduces it according to the reproduction order specified in the playlist PL. Here, the control unit 21 reproduces each video segment at the timing when the broadcast date / time is reached. The control unit 21 repeatedly checks the playlist PL, for example, at a predetermined interval, and reproduces the video segment with the earliest playback order among the unreproduced video segments.

  In step S12, the control unit 21 displays the reproduced video content of the video segment using the viewing screen SC shown in FIG. The viewing screen SC includes a display area PT where a moving image is displayed, and further includes a skip button B1, a rewind button B2, and a playback button for setting the playback position back to the past for a predetermined time (for example, 30 seconds). B3, fast forward button B4, and skip button B5 for advancing the playback position for a predetermined time are arranged. Further, on the viewing screen SC, a pull-down menu PM for designating a broadcasting station and a character string “Live” indicating that a live video is being displayed are displayed. The user can specify a broadcast station by operating the pull-down menu PM, and can perform an operation of changing the playback position by operating the skip button B1, the rewind button B2, the fast-forward button B4, or the skip button B5. In addition, the user instructs playback from the playback position by operating the playback button B3.

  Next, the control unit 21 determines whether or not to reset the reproduction target period (step S14). The control unit 11 determines whether or not it is necessary to reset the playback target period in order to play back the video segment of the subsequent playback target period after the playback of the video segment of the playback target period set immediately before is completed. For example, the control unit 21 determines “YES” in step S14 at a predetermined timing approaching the end point of the current reproduction target period, and returns to the process of step S6.

  If “NO” is determined in the step S14, the control unit 21 determines whether or not an operation for instructing the reproduction position is received via the touch screen unit 23 (step S15). When it determines with "NO" at step S15, the control part 21 returns to step S12 and continues reproduction | regeneration of a moving image segment.

  Here, let us consider a case where the user performs an operation to instruct a change in the playback position so as to play back the video segment of the non-linear segment group during playback of the video segment constituting the live video. In this case, the control unit 21 determines “YES” in step S15, and proceeds to the process of step S16 in FIG.

  Next, the control unit 21 determines whether or not the designated reproduction position is within the same reproduction target period (step S16). Here, the control unit 21 determines “NO” in step S16, and transmits a transmission request via the communication unit 22 (step S17). When receiving the transmission request via the communication unit 12 (step S18), the control unit 11 of the server device 10 reproduces the video segment arranged within the reproduction target period including the reproduction position based on the received reproduction program. A reproduction program is generated (step S19). Next, the control unit 11 transmits the generated reproduction program to the client device 20 via the communication unit 12 (step S20). The control unit 21 of the client device 20 receives this reproduction program via the communication unit 22 (step S21).

  Next, the control unit 21 of the client device 20 updates the playlist PL based on the reproduction program received in step S21 (step S22). When the playback position is changed after playback of “segment-0150.ts” of the linear segment group whose playback order is “51”, the control unit 21 changes the playback program “base” as shown in FIG. The playback order of the moving image segment whose segment file path specified by “-segment” is “segment-1100.ts” is “52”. Furthermore, according to the order of the broadcast date and time, the control unit 21 “segment-1101.ts”, “segment-1102.ts”,..., “Segment-1198.ts”, “segment-1199.ts”. To the playlist PL that lists the moving image segments in the order of "."

Next, the control unit 21 transmits a moving image acquisition request to the server device 10 via the communication unit 22 in accordance with the playlist PL (step S23). In step S <b> 23, the control unit 21 transmits a moving image acquisition request specifying a segment file path included in the playlist PL to the server device 10. When the control unit 11 of the server apparatus 10 receives the video acquisition request via the communication unit 12, the control unit 11 acquires the video segment of the segment file path specified by the video acquisition request from the database unit 107, and the client via the communication unit 12 It transmits to the apparatus 20 (step S24). The control unit 21 of the client device 20 acquires (receives) the moving image segment via the communication unit 22 as in the process of step S12, temporarily stores (buffers) it, and reproduces it according to the play list reproduction order. . However, the control unit 21 sequentially reproduces the moving image segments regardless of the broadcast date and time.
During playback of the video segment of the non-linear segment group, the control unit 21 displays the video in the display area PT on the viewing screen SC on which the character string “VOD” is displayed as shown in FIG. Let
Here, the case where the playback position is changed from the linear service to the non-linear service has been described. However, when the playback position is changed from the non-linear service to the linear service, the same processing steps as in steps S15 to S24 are performed. Control related to segment playback is performed.

  By the way, when the control unit 21 updates the playlist PL based on the reproduction program corresponding to one reproduction target period and then receives an operation for changing the reproduction position within the reproduction target period, the control unit 21 performs step S16. It is determined as “NO”. And the control part 21 progresses to the process of step S22, and updates playlist PL, without using a new reproduction | regeneration program. Here, as shown in FIG. 16A, consider the case where the reproduction position is changed to “segment-1132.ts” after the reproduction of “segment-1102.ts”. In this case, as illustrated in FIG. 16B, the control unit 21 deletes “segment-1103.ts” to “segment-1131.ts” from the playlist PL, and after “segment-1032.ts”. Advance the playback order of video segments. Thereby, an increase in processing load related to acquisition of an unnecessary reproduction program and an increase in traffic on the network 100 are suppressed.

  In the video reproduction system 1 described above, when the server device 10 provides various types of video distribution services, management is performed in a state where the video segments of the respective video distribution services are arranged on the same time axis. Therefore, the client device 20 can reproduce the moving image segment without generating a playlist individually for each moving image distribution service. Therefore, the client device 20 can continuously reproduce a plurality of moving image contents having different reproducible times. For the user, the moving image content of the linear service and the moving image content of the non-linear service can be treated as if they were continuous moving images and viewed.

[Modification]
The present invention can be implemented in a form different from the above-described embodiment. The present invention can also be implemented in the following forms, for example. Further, the following modifications may be combined as appropriate.
(Modification 1)
The server device 10 may generate a reproduction program for reproducing the moving image segment corresponding to the client device 20 when distributing the moving image segment in the non-linear group. Hereinafter, a case where the CM is changed according to the user attribute of the user of the client device 20 will be described.

  The control unit 21 of the client device 20 transmits the user attribute information stored in the storage unit 25 to the server device 10 in a transmission request. The control unit 11 of the server device 10 generates a reproduction program based on the user attribute information included in the received transmission request. At this time, based on the user attribute information included in the transmission request, the control unit 11 applies the reproduction program of FIG. 17A to the client device 20 of the user over 20 years old and the client device of the other user. For 20, the reproduction program of FIG. As shown in FIG. 17A, the reproduction program distributed to the client device 20 of a user 20 years or older includes a block ““ file ”:“ segment-1000-1.ts ””. As shown in FIG. 17 (B), a block ““ file ”:“ segment-1000-2.ts ”” is included in the reproduction program distributed to the client device 20 of other users, that is, users under 20 years old. It is included. As a result, for example, the video segment “segment-1000-1.ts” is made into a video segment that constitutes an adult CM such as alcohol, and the video segment “segment-1000-2.ts” is made into juice, etc. As a moving image segment constituting a CM for minors, the CM can be made different depending on the user of the client device 20.

Further, the control unit 11 can change the moving image segment to be distributed according to the client device 20 without changing the reproduction program according to the client device 20. In the reproduction program shown in FIG. 18, “20” or more by being described as ““ file ”:“ segment-1000-1.ts ”” in the block described as “when”: “age> 20” ”. The moving image segment distributed to the user's client device 20 is designated. In addition, when ““ file ”:“ segment-1000-2.ts ”” is described in a block described as ““ when ”:“ default ””, it is distributed to the client device 20 of the user under 20 years old. Specified video segment. Based on the user attribute information stored in the storage unit 25, the control unit 21 of the client device 20 selects either “segment-1000-1.ts” or “segment-1000-2.ts” as the playlist PL. It is determined whether to enumerate and the playlist PL is updated.
The user attribute is not limited to the user's age, and may be a user attribute such as gender, hobby, preference, residence, and the like.

(Modification 2)
The server device 10 may vary the reproduction target period according to the history of operations for changing the reproduction position. In this case, the server apparatus 10 implements the function shown in FIG. The DB management unit 111 </ b> A manages, for each client device 20, the operation history information indicating the history of the operation for changing the reproduction position in the database unit 107. The operation history information is, for example, the frequency of changing the playback position (that is, the number of times in the unit period) or the total number of times of changing the playback position, and serves as an index of the number of opportunities to change the playback position.

  When the reproduction program generation unit 117A generates a reproduction program for one client device 20, the reproduction program generation unit 117A refers to the operation history information corresponding to the client device 20 to specify the reproduction target period. When the playback position change frequency is relatively high, the playback program generation unit 117A sets a range of 10 minutes before and after the playback position T as a playback target period, as shown in FIG. When the change frequency of the playback position is medium, the playback program generation unit 117A sets a range of 5 minutes before and after the playback position T as a playback target period, as shown in FIG. When the playback position change frequency is relatively low, the playback program generation unit 117A sets a range of 2 minutes 30 seconds before and after the playback position T as a playback target period, as shown in FIG. To do.

  According to the moving image playback system 1 of this modification, a client device of a user who frequently changes the playback position while shortening the playback target period to reduce an increase in traffic on the network 100 for a certain client device 20. For 20, the reproduction of the moving image content when the reproduction position is changed can be made smooth.

(Modification 3)
The server device 10 may perform insertion processing for inserting a moving image segment for a moving image segment belonging to a non-linear segment group. For this purpose, the server device 10 includes a moving image insertion unit 120. In this modification, the moving image insertion unit 120 performs insertion processing for inserting a CM.

FIG. 21 is a block diagram illustrating a functional configuration of the moving image insertion unit 120. As shown in FIG. 21, the moving image insertion unit 120 includes a pre-insertion moving image acquisition unit 1201, an insertion moving image acquisition unit 1202, a processing unit 1203, and an insertion moving image segment DB 1204.
The pre-insertion video acquisition unit 1201 acquires the video segment before the insertion process from the video segment generation unit 105. The insertion moving image acquisition unit 1202 acquires an insertion moving image segment from the insertion moving image segment DB 1204. In the moving image segment DB 1204 for insertion, a moving image segment for insertion prepared in advance, for example, by being generated by another system is recorded. The processing unit 1203 processes the video segment before insertion processing based on the video segment for insertion.
The moving image segment DB 1204 for insertion may be provided outside the moving image insertion unit 120.

  FIG. 22 is a diagram illustrating a specific example of the insertion process. FIG. 22A shows a moving image segment before insertion processing, and FIG. 22B shows a moving image segment for insertion that constitutes a 30-second CM. In this case, the processing unit 1203 rewrites the reproduction time stamp of the video segment for insertion based on the insertion position. The insertion position is designated by a service provider, for example. As shown in FIG. 22C, when the insertion position is “15:00:00”, the processing unit 1203 sets the playback time stamp of the first video segment among the video segments for insertion to “15”. : 00:00 "and the playback time stamp of the last video segment is rewritten to" 15:00:30 ". The processing unit 1203 rewrites the reproduction time stamp in the same manner for the other moving image segments for insertion. Further, the processing unit 1203 rewrites the reproduction time stamp of the moving image segment arranged after the insertion position among the moving image segments before the insertion processing. Here, as shown in FIG. 22D, the processing unit 1203 adds the reproduction time stamp of the moving image segment after “15:00: 00” to “00:00:30” as the reproduction time stamp. Rewrite to And the process part 1093 inserts the moving image segment for insertion in the insertion position in the moving image segment before insertion processing. Thereby, the moving image segment after the insertion process shown in FIG. The processing unit 1203 supplies the moving image segment after the insertion processing to the non-linear moving image recording unit 110.

(Modification 4)
The database unit 107 may be provided outside the server device 10. In this case, the server device 10 has a reproduction program distribution function, but does not have a moving image segment distribution function. Further, the server device that distributes the reproduction program may be divided between the linear service and the non-linear service. In addition, a database for recording a moving image segment may be divided into a linear service and a non-linear service.

(Modification 5)
In the above-described embodiment, the server apparatus 10 generates a reproduction program after receiving a transmission request. However, the generation timing of the reproduction program is not limited to this. The server device 10 may store a reproduction program generated in advance, search for a reproduction program corresponding to the received transmission request, and transmit the reproduction program to the client device 20. Further, the server device 10 may transmit a reproduction program corresponding to, for example, a linear service, for example, at a predetermined timing once a day without receiving a transmission request.

(Modification 6)
Some of the configurations and operations described in the above-described embodiments may be omitted. Further, the order of the processes described in the above-described embodiments may be changed as appropriate. Further, the form of the moving image distribution service, the protocol used, the content of the description of the reproduction program, the numerical value, the content of the screen, the operation method, etc. described in the above-described embodiments are merely examples.

(Modification 7)
The moving image reproduction system of the present invention does not necessarily include a server device that distributes a reproduction program. Further, the client device does not necessarily have a configuration for updating the playlist based on the reproduction program. The moving image reproducing unit of the client device acquires a moving image segment at a reproducible time from the database unit according to the reproduction position specified by the operation received by the receiving unit. And this moving image reproducing part should just reproduce | regenerate the acquired moving image segment. For example, the moving image reproduction unit reproduces the moving image segment according to the order of the broadcast date and time indicated by the date and time information included in the segment information described in the above-described embodiment.

  The functions realized by the server device 10 and the client device 20 according to the above-described embodiments can be realized by a combination of a plurality of programs, or can be realized by linkage of a plurality of hardware resources. When the functions of the server device 10 and the client device 20 are realized using a program, the program can be a magnetic recording medium (magnetic tape, magnetic disk (HDD (Hard Disk Drive), FD (Flexible Disk)), etc.), optical It may be provided in a state stored in a computer-readable recording medium such as a recording medium (such as an optical disk), a magneto-optical recording medium, or a semiconductor memory, or may be distributed via a network. The present invention can also be understood as a moving image distribution method.

DESCRIPTION OF SYMBOLS 1 ... Movie reproduction system, 10 ... Server apparatus, 11 ... Control part, 12 ... Communication part, 13 ... Storage part, 131 ... Server application, 101 ... Capture part, 102 ... Date information acquisition part, 103 ... TS file storage part, DESCRIPTION OF SYMBOLS 104 ... Encoder, 105 ... Video segment production | generation part, 106 ... Linear type | mold video recording part, 107 ... Database part, 108 ... Program information acquisition part, 109 ... Video replacement part, 1091 ... Pre-replacement video acquisition part, 1092 ... Difference Replacement video acquisition unit, 1093 ... Processing unit, 1094 ... Replacement video segment DB, 110 ... Nonlinear video recording unit, 111, 111A ... DB management unit, 112 ... Log information reception unit, 113 ... Log information processing unit, 114: Program guide generation unit, 115: Program guide transmission unit, 116: Request reception unit, 117, 117A: Reproduction program generation unit, 1 DESCRIPTION OF SYMBOLS 8 ... Play program transmission part, 119 ... Movie transmission part, 120 ... Movie insertion part, 1201 ... Pre-insertion movie acquisition part, 1202 ... Insertion movie acquisition part, 1203 ... Processing part, 1204 ... Insertion movie segment DB, 20 ... client device, 21 ... control unit, 22 ... communication unit, 23 ... touch screen unit, 24 ... audio processing unit, 25 ... storage unit, 251 ... client application, 201 ... reception unit, 202 ... log information collection unit , 203 ... log information transmission unit, 204 ... program guide reception unit, 205 ... program guide display unit, 206 ... request transmission unit, 207 ... reproduction program reception unit, 208 ... playlist update unit, 209 ... playlist storage unit, 210 ... Video playback part

Claims (9)

A database section in which a video segment constituting the first video content to be reproduced at a specific time and a video segment constituting the second video content to be reproduced at a time other than the specific time are recorded on the same time axis;
A video playback system comprising: a client device that plays back a video segment using the database unit;
The client device is
A reception unit that receives an operation for instructing a position on the time axis;
Based on the received operation, the video playback unit includes: a video playback unit that acquires a video segment at a reproducible time from the database unit according to the instructed position on the time axis, and plays back the acquired video segment system. A server device that distributes to the client device a program used to update a playlist for reproducing a plurality of video segments recorded on the same time axis;
The server device
A request receiving unit for receiving a transmission request for the program designating the position from the client device;
Based on the received transmission request, a program transmission unit for transmitting the program for reproducing the moving image segments arranged within a predetermined period including the position on the time axis, and
The client device is
A request transmission unit that transmits the transmission request to the server device based on the operation;
A program receiver for receiving the program transmitted by the program transmitter;
A playlist update unit that updates the playlist that lists the video segments arranged within the period based on the received program;
The video playback unit is
The moving image reproduction system according to claim 1, wherein a moving image segment at a reproducible time is acquired from the database unit according to the playlist, and the acquired moving image segment is reproduced. The program transmission unit
The moving image reproduction system according to claim 2, wherein at least a part of the moving image segment constituting the second moving image content is transmitted as a moving image segment corresponding to the client device. The playlist update unit
After updating the playlist based on the program corresponding to one period, if the operation to change the position is accepted within the period, the playlist is not used without the new program. The moving image reproducing system according to claim 2 or 3, wherein the moving image reproducing system is updated. The program transmission unit
The moving image reproduction system according to any one of claims 2 to 4, wherein the period is varied according to a history of the operation for changing the position. Video using a database section in which a video segment constituting the first video content to be played at a specific time and a video segment constituting the second video content to be played at a time other than the specific time are recorded on the same time axis An accepting unit for accepting an operation for instructing a position on the time axis when reproducing a segment;
A client device comprising: a moving image reproducing unit that acquires a moving image segment at a reproducible time from the database unit according to the instructed position on the time axis based on the received operation, and reproduces the acquired moving image segment . A server device that distributes a program used to update a playlist for reproducing a plurality of video segments recorded on the same time axis to the client device according to claim 6,
A request receiving unit for receiving a transmission request for the program designating the position from the client device;
A server apparatus comprising: a program transmission unit configured to transmit the program for reproducing a moving image segment arranged within a predetermined period including the position on the time axis based on the received transmission request. On the client device computer,
Video using a database section in which a video segment constituting the first video content to be played at a specific time and a video segment constituting the second video content to be played at a time other than the specific time are recorded on the same time axis A step of accepting an operation for indicating a position on the time axis when reproducing a segment; and
A program for executing a step of acquiring a video segment at a reproducible time from the database unit according to the instructed position on the time axis based on the received operation and reproducing the acquired video segment . A program used for updating a playlist for reproducing a plurality of moving image segments recorded on the same time axis, to a computer of a server device that distributes to a client device according to claim 6,
Receiving a transmission request for the program designating the location from the client device;
Transmitting the program for reproducing the moving image segments arranged within a predetermined period including the position on the time axis based on the received transmission request.

Images