WO2015045917A1 - コンテンツ供給装置、コンテンツ供給方法、プログラム、端末装置、およびコンテンツ供給システム - Google Patents
コンテンツ供給装置、コンテンツ供給方法、プログラム、端末装置、およびコンテンツ供給システム Download PDFInfo
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- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
- H04N21/266—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel
- H04N21/26616—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel for merging a unicast channel into a multicast channel, e.g. in a VOD application, when a client served by unicast channel catches up a multicast channel to save bandwidth
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- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/234—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs
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- H04N21/854—Content authoring
- H04N21/85406—Content authoring involving a specific file format, e.g. MP4 format
Definitions
- the present disclosure relates to a content supply apparatus, a content supply method, a program, a terminal device, and a content supply system, and in particular, a content supply apparatus suitable for use in distributing content by file delivery over Unidirectional Transport (FLUTE).
- the present invention relates to a method, a program, a terminal device, and a content supply system.
- DASH Motion Picture Experts Group-Dynamic Adaptive Streaming over HTTP, hereinafter referred to as DASH
- DASH is known (see, for example, Non-Patent Document 1).
- Adaptive streaming technology is realized in DASH. That is, the content supply side prepares and distributes a plurality of streams having the same content and different bit rates depending on the image quality, the angle of view, and the like.
- the content receiving side selects, receives, and reproduces an optimal stream according to the communication environment of the Internet, its own decoding capability, and the like among the plurality of streams prepared by the supplying side.
- the supply side is configured to supply a meta file called MPD (Media Presentation Description) to the reception side so that the reception side can adaptively select, receive, and reproduce the stream.
- MPD Media Presentation Description
- the MPD describes the address (url information) of a server (supply source) that supplies a stream of chunked content (media data such as Audio / Video / Subtitle) to the reception side.
- a server supply source
- chunked content media data such as Audio / Video / Subtitle
- the receiving side accesses the server that is the source of content supply to request a stream, and in response to the request, the server receives and reproduces the stream that is subjected to HTTP unicast distribution.
- FIG. 1 shows an example of the configuration of a content supply system for streaming content based on DASH.
- the content supply system 10 includes a plurality of content supply devices 20 for supplying content, and a plurality of DASH clients 30 for receiving and reproducing the content.
- the DASH client 30 can connect to the content supply apparatus 20 via a content delivery network (CDN) 12 using the Internet 11.
- CDN content delivery network
- the content supply apparatus 20 distributes a plurality of streams having the same content but different bit rates.
- the content supply device 20 includes a content management server 21, a DASH segment streamer 22, and a DASH MPD server 23.
- the content management server 21 manages source data of content to be distributed to the DASH client 30, generates a plurality of streaming data having different bit rates from the source data, and outputs the streaming data to the DASH segment streamer 22.
- the DASH segment streamer 22 temporally divides each streaming data into segments to generate a segment stream such as, for example, a fragmented MP 4 and files and holds the generated segment streams. Furthermore, in response to a request (HTTP request) from the DASH client 30 as the WEB server, the DASH segment streamer 22 HTTP unicasts the file of the segment stream to be held to the request source. Furthermore, the DASH segment streamer 22 notifies the DASH MPD server 23 of metadata including an address indicating the source of the file of the segment stream.
- the DASH MPD server 23 generates an MPD in which an address or the like representing a segment stream file source (that is, the DASH segment streamer 22) is described. Further, the DASH MPD server 23 distributes the generated MPD to the request source as HTTP WEB in response to a request (HTTP request) from the DASH client 30 as a WEB server.
- the DASH client 30 requests the MPD from the DASH MPD server 23 and receives the HTTP unicast distributed MPD accordingly. Furthermore, based on the received MPD, the DASH client 30 requests the DASH segment streamer 22 for the segment stream file, and receives and plays the HTTP unicast segment stream file accordingly.
- the CDN 12 includes a cache server (not shown), and the cache server caches MPD and segment stream files to be HTTP-unicast-distributed via the CDN 12. Then, instead of the DASH MPD server 23 or the DASH segment streamer 22 as the WEB server, the cache server distributes the caching MPD and segment stream to the request source by HTTP unicast in response to the request from the DASH client 30. be able to.
- DASH implements adaptive streaming technology using HTTP unicast delivery.
- the DASH client 30 can receive not only the HTTP unicast distribution but also the FLUTE multicast distribution using a mobile telephone communication network represented by 3GPP, the content stream can be distributed by FLUTE multicast. desirable.
- the cache server provided on the CDN 12 or on the local network on the receiving side receives FLUTE multicast distribution and performs caching, and the DASH client 30 According to a request from the server, an operation such as HTTP unicast delivery of a stream of cached content to a request source may be considered.
- SDP generally sent in the FLUTE presentation layer Session Media Protocol is used.
- MPD is used to notify the receiving side of the IP address of the WEB server (DASH segment streamer 22) that performs HTTP unicast distribution of the content stream.
- SDP and MPD describe information on the corresponding segment stream and FLUTE stream, respectively, but a method of describing the correspondence between the two is not defined. Specifically, for example, the correspondence relationship with the AdaptationSet and Representation described in the MPD can not be described in the SDP.
- the present disclosure has been made in view of such a situation, and enables a receiver to be notified of the correspondence between a FLUTE stream distributed by FLUTE multicast and a segment stream distributed by HTTP unicast.
- a content supply apparatus is a content supply apparatus that distributes content using adaptive streaming technology, and a fragment stream generation unit that generates a fragment stream based on source data of the content;
- An MPD generation unit that generates an MPD describing information necessary for the receiver to acquire the fragment stream to be subjected to HTTP unicast distribution, a unicast distribution unit that performs HTTP unicast distribution of the MPD and the fragment stream, and Information on a FLUTE session for generating a FLUTE stream from a fragment stream and distributing the FLUTE stream, and the MPD on which information necessary for a receiver to acquire the fragment stream corresponding to the FLUTE stream is described Information to generate an SDP, and a multicast distribution unit that distributes the FLUTE stream and the SDP by FLUTE multicast.
- the FLUTE stream generation unit can describe the information on the MPD in the SDP by the attribute line defined to describe the information on the MPD.
- the FLUTE stream generation unit may describe at least one of at least one of ⁇ mpd url>, ⁇ adaptation set id>, ⁇ representation id>, or ⁇ base url> that is a description element of the attribute line. Can.
- the FLUTE stream generation unit can further describe the reception mode in the SDP by an attribute line defined to describe a reception mode when the reception side receives the FLUTE session for distributing the FLUTE stream. .
- the FLUTE stream generation unit can describe any one of Promiscuous, One-copy, and Keep-updated in the ⁇ receive mode> of the attribute line as the reception mode.
- a content supply method is a content supply method of a content supply apparatus for distributing content using adaptive streaming technology, wherein a fragment is generated based on source data of the content by the content supply apparatus.
- a program includes: a computer that delivers content using adaptive streaming technology; a fragment stream generation unit that generates a fragment stream based on source data of the content; and the HTTP unicast
- An MPD generation unit that generates an MPD that describes information necessary for the receiver to acquire the fragment stream to be distributed, a unicast distribution unit that performs HTTP unicast distribution of the MPD and the fragment stream, and the fragment stream
- a FLUTE stream generation unit that generates an SDP
- a multicast distribution unit that distributes the FLUTE stream and the SDP as a FLUTE multicast.
- information on a FLUTE session for distributing a FLUTE stream and information on an MPD in which information necessary for a receiver to acquire a fragment stream corresponding to the FLUTE stream is described is described. Then, an SDP is generated, and the FLUTE stream and the SDP are distributed by FLUTE multicast.
- a terminal device that generates a fragment stream based on source data of content, and a receiver side need to obtain the fragment stream to be delivered by HTTP unicast.
- a FLUTE stream generation unit that generates an SDP by describing information related to the MPD in which information related to the information on the information required for the receiving side to acquire the fragmented stream corresponding to the FLUTE stream is described;
- the SDP is FLUTE multi
- a terminal apparatus that receives and reproduces a FLUTE stream distributed by FLUTE multicast from a content supply apparatus including a multicast distribution unit that performs cast distribution acquires the SDP that is distributed by FLUTE multicast, and based on the acquired SDP, the FLUTE Receive the multicast distributed FLUTE stream.
- the terminal device acquires the MPD corresponding to the SDP based on the acquired SDP, and acquires the segment stream distributed via HTTP unicast based on the acquired MPD. can do.
- a FLUTE multicast distributed SDP is acquired, and a FLUTE multicast distributed FLUTE stream is received based on the acquired SDP.
- a content supply system is a content supply system including a content supply device and a terminal device, wherein the content supply device generates a fragment stream based on content source data.
- a generator an MPD generator that generates an MPD describing information necessary for the receiver to acquire the fragment stream to be HTTP unicast distributed, and a unicast distribution to HTTP unicast the MPD and the fragment stream ,
- a FLUTE stream generated from the fragment stream, information on a FLUTE session for distributing the FLUTE stream, and information necessary for the receiver to acquire the fragment stream corresponding to the FLUTE stream are described
- a FLUTE stream generation unit that generates an SDP by describing information related to the MPD, and a multicast distribution unit that distributes the FLUTE stream and the SDP by FLUTE multicast.
- the terminal device acquires the SDP delivered by FLUTE multicast and receives the FLUTE stream delivered by FLUTE multicast based on the acquired SDP.
- an MPD in which information about a FLUTE session distributing a FLUTE stream and information necessary for a receiver to acquire a fragment stream corresponding to the FLUTE stream is described by the content supply apparatus Information related to is described to generate an SDP, and the FLUTE stream and the SDP are distributed by FLUTE multicast.
- the terminal device acquires the SDP delivered by FLUTE multicast, and the FLUTE stream delivered by FLUTE multicast is received based on the acquired SDP.
- the first aspect of the present disclosure it is possible to notify the receiving side of the correspondence between the FLUTE stream distributed by FLUTE multicast and the segment stream distributed by HTTP unicast.
- the receiving side it is possible to notify the receiving side of the correspondence between the FLUTE stream to be distributed by FLUTE multicast and the segment stream to be distributed by HTTP unicast, and the receiving side is to be distributed by FLUTE multicast It enables rapid switching between a FLUTE stream and a segment stream delivered via HTTP unicast.
- FIG. 2 shows an outline of a scheme for transmitting a packet in a FLUTE session.
- an ALC packet is transmitted in a FLUTE session specified by Source IP Address described in SDP and Transport Session Identifier (TSI).
- TSI Transport Session Identifier
- a video stream and an audio stream are stored in each ALC packet, and a unique TOI (Transport Object Identifier) is assigned in the FLUTE session.
- TOI Transport Object Identifier
- TOI 0 is given to the ALC packet in which FDT (File Delivery Table) is stored.
- a common TOI is given to the ALC packet in which other data are stored if the data source is the same. For example, a common TOI is given to all ALC packets stored by dividing the video stream. Similarly, a common TOI is given to all ALC packets that are divided and stored in the audio stream.
- the FDT is sent periodically in the FLUTE session.
- the ALC packet in which the desired video stream is stored can not be received, and it may occur that the desired video stream is not reproduced without interruption. . This is remarkable when the number of retransmissions of the ALC packet is small or retransmission is not performed as in live streaming.
- an elementary stream of a single media type is transmitted in a FLUTE session, and before acquiring the FLUTE session, SDP (Session Media Protocol) transmitted in a FLUTE presentation layer is used.
- SDP Session Media Protocol
- the receiver side is notified of the media type, the reception mode, and the like.
- Promiscuous is a receiving mode for prompting the receiving side to receive all ALC packets transmitted in a FLUTE session. Promiscuous is assumed to be notified of, for example, when the number of retransmissions of ALC packets is small, such as live streaming, or when retransmissions are not performed.
- One-copy is a reception mode for notifying the receiving side that it is not necessary to monitor the presence or absence of the ALC packet update because the ALC packet transmitted once is not transmitted after updating its contents.
- Keep-updated is a reception mode for notifying the reception side that it is necessary to monitor the presence or absence of the update of the ALC packet because the contents of the ALC packet transmitted once may be updated and transmitted.
- reception mode it is also possible to add a combination of the three reception modes described above, for example, Promiscuous + Keep-updated, etc. to the reception mode.
- the media description part of SDP (a session description part when only one medium is defined in the entire session defined in SDP), the following attribute lines are introduced, Sap and MPD AdaptationSet and Repesentation
- a mpd-mapping: ⁇ mpd url> ⁇ adaptation set id> ⁇ representationid> ⁇ baseurl>
- the attribute type of the attribute line is mpd-mapping, and has ⁇ mpd url>, ⁇ adaptation set id>, ⁇ representation id>, and ⁇ base url> as its description elements.
- the ⁇ mpd url> describes the url of the MPD.
- ⁇ adaptation set id> an id attribute (AdaptationSet / @ id) of the AdaptationSet is described.
- ⁇ representation id> an id attribute (Representation / @ id) of the relevant Representation is described.
- base url> a url (AdaptationSet / @ BaseURL or Representation / @ BaseURL) corresponding to AdaptationSet or Representation is described.
- FIG. 3 shows a configuration example of a content supply system according to an embodiment of the present disclosure.
- the content supply system 50 is composed of a plurality of content supply devices 60 and a large number of terminal devices 80.
- the content supply device 60 and the terminal device 80 can be connected via the network 51.
- the network 51 includes various broadcasting networks using terrestrial broadcast waves, satellite broadcast waves, mobile broadcast (e) MBMS, etc., in addition to the Internet and a two-way communication network represented by CDN using the Internet. .
- the content supply device 60 performs HTTP unicast distribution of content stream and FLUTE multicast distribution, and includes a channel server 61, segmenter 62, MPD generator 63, FLUTE streamer 64, WEB server 65, and multicast server 66. .
- the channel servers 61 to the multicast server 66 included in the content supply apparatus 60 may be integrated and arranged at one place, or may be distributed and arranged via the Internet or the like.
- the channel server 61 generates a plurality of streaming data having different bit rates from the source data of the content to be distributed to the terminal device 80, and outputs the streaming data to the segmenter 62.
- the segmenter 62 temporally divides each streaming data into segments to generate a segment stream such as Fragmented MP 4, and outputs the generated segment stream to the FLUTE streamer 64 and the WEB server 65.
- the segmenter 62 notifies the MPD generator 63 of metadata including an address indicating the source of the segment stream.
- the MPD generator 63 Based on the metadata notified from the segmenter 62, the MPD generator 63 generates an MPD in which an address or the like representing the supply source (WEB server 65) of the segment stream file is described and outputs it to the FLUTE streamer 64 and the WEB server 65.
- an acquisition destination of an SDP in which a destination IP address of a FLUTE session of a FLUTE stream distributed by FLUTE multicast distribution is switchable from a segment stream distributed by HTTP unicast is described.
- the FLUTE streamer 64 divides the segment stream sequentially input from the segmenter 62 and stores it in an ALC packet, thereby converting it into a FLUTE stream and outputting it to the multicast server 66. Also, the FLUTE streamer 64 stores the MPD generated by the MPD generator 63 in an ALC packet and outputs the packet to the multicast server 66. Furthermore, the FLUTE streamer 64 describes the SDP related to the FLUTE session and outputs it to the multicast server 66.
- the WEB server 65 HTTP-unicasts the MPD input from the MPD generator 63 to the request source in response to the MPD request (HTTP request) from the terminal device 80.
- the WEB server 65 performs HTTP unicast delivery of the segment stream file to the request source.
- the multicast server 66 distributes the MPD, SDP, and FLUTE streams by FLUTE multicast.
- the terminal device 80 acquires the MPD from the content supply device 60 via the network 51. Specifically, an HTTP request requesting MPD is transmitted, and accordingly, the MPD which is HTTP unicast distributed is received, or the MPD which is FLUTE multicast distributed is received. In addition, when the terminal device 80 receives an MPD to which FLUTE multicast distribution is performed, the announcement information in which the portal channel of the multicast server 66 that performs FLUTE multicast distribution is described is referred to.
- the announcement information is made known via an interaction channel or a broadcast / multicast channel by USD (User Service Description) or the like in MBMS when the FLUTE multicast delivery is performed via mobile broadcast (e) MBMS included in the network 51. Ru.
- the announcement information may be an interaction channel or a broadcast by means of an Electronic Service Guide (ESG) of DVB-H (IPDC) or the like. It is known via a multicast channel.
- ESG Electronic Service Guide
- IPDC DVB-H
- the terminal device 80 transmits an HTTP request for requesting a segment stream to the WEB server 65 based on the acquired MPD, and receives and reproduces a file of the segment stream to be distributed by HTTP multicast according to this.
- the terminal device 80 acquires an SDP based on the acquired MPD, and receives and reproduces a FLUTE stream distributed by FLUTE multicast based on the SDP.
- the reception mode described in the SDP is referred to, for example, if the reception mode is Promiscuous, all ALC packets transmitted in the corresponding FLUTE session are immediately received.
- the receiving side since it is possible that the receiving side does not have enough buffers to hold all ALC packets, it is up to the receiving side to execute the operation according to the receiving mode notified by SDP. .
- FIG. 4 shows a description example of the SDP.
- the SDP is composed of a session description unit and a media description unit.
- ⁇ Type> is specified by one alphabetic character and represents a meaning on the protocol of the line.
- ⁇ value> a character string is described, and in accordance with the type of the corresponding ⁇ type>, a unique format and meaning are defined.
- the attribute line has an attribute type of single-fmt, and has ⁇ media>, ⁇ encoding name>, and ⁇ receive mode> as its description elements.
- ⁇ media> for example, video, audio and the like are described as media types.
- ⁇ encoding name> for example, H.264, H.261, GSM (registered trademark) or the like is described as an encoding method.
- ⁇ promiscuous> promiscuous, one-copy, or keep-updated is described as a reception mode. In addition, you may add Promiscuous + Keep-updated etc. which combined these to reception mode.
- A single-fmt: video H264 / 9000 promiscouos described in the example of FIG. 4 indicates that the media type is video, the encoding method is H.264, the time scale is 90 KHz, and the reception mode is promiscouos There is.
- a single-fmt: ⁇ media> ⁇ encoding name> ⁇ receive mode> may be introduced into the session description section. In that case, the described attribute type is treated as information on the entire FLUTE session.
- the attribute line has an attribute type of mpd-mapping, and has ⁇ mpd url>, ⁇ adaptation set id>, ⁇ representation id>, and ⁇ base url> as its description elements. However, not all of the description elements may be described, but only some of them may be described.
- the ⁇ mpd url> describes the url of the MPD.
- ⁇ adaptation set id> an id attribute (AdaptationSet / @ id) of the AdaptationSet is described.
- ⁇ representation id> an id attribute (Representation / @ id) of the relevant Representation is described.
- base url> a url (AdaptationSet / @ BaseURL or Representation / @ BaseURL) corresponding to AdaptationSet or Representation is described.
- FIG. 5 shows the relationship between the SDP in the state where two newly defined attribute lines are added, the corresponding MPD, and the FLUTE session for distributing the FLUTE stream (A / V stream) described above. .
- FIG. 5 is a flow chart for explaining the processing of the content supply apparatus 60 performing HTTP unicast distribution of the segment stream of content and FLUTE multicast distribution of the FLUTE stream (hereinafter referred to as processing of the content supply apparatus).
- step S 1 the channel server 61 generates a plurality of streaming data having different bit rates from the source data of the content to be distributed to the terminal device 80 and outputs the streaming data to the segmenter 62.
- step S2 the segmenter 62 generates a segment stream such as Fragmented MP 4 based on each streaming data, and outputs the segment stream to the FLUTE streamer 64 and the WEB server 65.
- the segmenter 62 notifies the MPD generator 63 of metadata including an address indicating the source of the segment stream.
- step S 3 the FLUTE streamer 64 converts the segment stream input from the segmenter 62 into a FLUTE stream and outputs the FLUTE stream to the multicast server 66. Also, the FLUTE streamer 64 stores the MPD generated by the MPD generator 63 in an ALC packet and outputs the packet to the multicast server 66. Furthermore, the FLUTE streamer 64 generates an SDP for a FLUTE session and outputs the SDP to the multicast server 66.
- step S4 the MPD generator 63 receives the address (WEB server 65) of the source of the segment stream file to be HTTP unicast distributed, the destination of the FLUTE stream of FLUTE stream to be FLUTE multicast distributed, switchable from the segment stream An MPD in which the acquisition destination of the SDP in which the National IP address is described is described is generated and output to the FLUTE streamer 64 and the WEB server 65.
- step S5 the multicast server 66 distributes the MPD and SDP by FLUTE multicast.
- step S6 when there is a request for an MPD from the terminal device 80, the WEB server 65 HTTP-unicasts the MPD input from the MPD generator 63 to the request source.
- step S7 the WEB server 65 performs HTTP unicast distribution of the requested segment stream file to the request source. .
- the segment stream delivered by HTTP unicast is received by the terminal device 80 and reproduced.
- step S8 the multicast server 66 distributes FLUTE streams by FLUTE multicast.
- the terminal device 80 receives a FLUTE stream distributed by FLUTE multicast
- the SDP is acquired based on the acquired MPD
- the SDP is analyzed
- the FLUTE session for distributing the FLUTE stream is received
- the FDT is acquired first.
- an ALC packet including a desired FLUTE stream is extracted from the FLUTE session, and the FLUTE stream is reconstructed and reproduced.
- the reception mode described in SDP is referred to. Specifically, when the reception mode is Promiscuous, all ALC packets transmitted in the corresponding FLUTE session are immediately received prior to FDT acquisition, analysis, and the like. However, whether or not to execute the operation according to the reception mode notified by the SDP is left to the receiving side, and the supply side does not forcibly control the operation of the terminal device 80.
- the correspondence relationship between the SDP and the MPD to the terminal apparatus 80 that is, the FLUTE stream being delivered by FLUTE multicast and the segment stream being delivered by HTTP unicast. Correspondence can be notified. This enables quick switching between the FLUTE stream and the segment stream.
- the terminal device 80 can notify the terminal device 80 of a reception mode suitable for reception before the terminal device 80 starts reception of the FLUTE session. Therefore, the terminal device 80 can suppress the generation of the ALC packet and the like. In addition, since this notification does not forcibly control the operation of the terminal device 80, it is possible to prevent a situation in which the buffer of the terminal device 80 overflows.
- the content supply device 60 and the terminal device 80 that execute the series of processes described above can be realized by a computer executing software, in addition to hardware configuration.
- the computer includes, for example, a general-purpose personal computer capable of executing various functions by installing a computer incorporated in dedicated hardware and various programs.
- FIG. 7 is a block diagram showing an example of the hardware configuration of the computer described above.
- a central processing unit (CPU) 201 a read only memory (ROM) 202, and a random access memory (RAM) 203 are mutually connected by a bus 204.
- CPU central processing unit
- ROM read only memory
- RAM random access memory
- an input / output interface 205 is connected to the bus 204.
- An input unit 206, an output unit 207, a storage unit 208, a communication unit 209, and a drive 210 are connected to the input / output interface 205.
- the input unit 206 includes a keyboard, a mouse, a microphone and the like.
- the output unit 207 includes a display, a speaker, and the like.
- the storage unit 208 includes a hard disk, a non-volatile memory, and the like.
- the communication unit 209 is configured of a network interface or the like.
- the drive 210 drives removable media 211 such as a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor memory.
- the CPU 201 loads the program stored in the storage unit 208 into the RAM 203 via the input / output interface 205 and the bus 204 and executes the program. A series of processing is performed.
- the program executed by the computer 200 can be provided by being recorded on, for example, a removable medium 211 as a package medium or the like. Also, the program can be provided via a wired or wireless transmission medium such as a local area network, the Internet, or digital satellite broadcasting.
- the program can be installed in the storage unit 208 via the input / output interface 205 by attaching the removable media 211 to the drive 210.
- the program can be received by the communication unit 209 via a wired or wireless transmission medium and installed in the storage unit 208.
- the program can be installed in advance in the ROM 202 or the storage unit 208.
- the program executed by the computer 200 may be a program that performs processing in chronological order according to the order described in the present specification, or necessary timing such as when calling is performed in parallel or in parallel.
- the program may be a program to be processed in
- a fragment stream generation unit that generates a fragment stream based on source data of the content;
- An MPD generation unit that generates an MPD in which information necessary for the receiver to acquire the fragment stream to be delivered by HTTP unicast is described;
- a unicast delivery unit for HTTP unicast delivery of the MPD and the fragment stream;
- Information on the FLUTE session for generating the FLUTE stream from the fragment stream and for distributing the FLUTE stream, and the MPD on which information necessary for the receiver to acquire the fragment stream corresponding to the FLUTE stream is described
- a FLUTE stream generation unit that describes information and generates an SDP;
- a multicast distribution unit that distributes the FLUTE stream and the SDP by FLUTE multicast.
- the content supply device (2) The content supply device according to (1), wherein the FLUTE stream generation unit describes the information on the MPD in the SDP by an attribute line defined to describe the information on the MPD.
- the content supply device (2).
- the FLUTE stream generation unit describes one of at least one of ⁇ mpd url>, ⁇ adaptation set id>, ⁇ representation id>, or ⁇ base url>, which is a description element of the attribute line, in the SDP.
- the content supply device according to (2) or (3).
- the FLUTE stream generation unit further describes the reception mode in the SDP by an attribute line defined to describe a reception mode when the reception side receives the FLUTE session to which the FLUTE stream is distributed.
- the content supply device according to any one of (1) to (4).
- the content supply device according to (5).
- the FLUTE stream generation unit describes any one of Promiscuous, One-copy, and Keep-updated as the reception mode in ⁇ receive mode> of the attribute line.
- a fragment stream generation step of generating a fragment stream based on source data of the content An MPD generation step of generating an MPD in which information necessary for the receiver to acquire the fragment stream to be delivered by HTTP unicast is described; A unicast delivery step of HTTP unicast delivery of the MPD and the fragment stream; Information on the FLUTE session for generating the FLUTE stream from the fragment stream and for distributing the FLUTE stream, and the MPD on which information necessary for the receiver to acquire the fragment stream corresponding to the FLUTE stream is described
- a FLUTE stream generation step of describing information and generating an SDP A multicast delivery step of FLUTE multicast delivery of the FLUTE stream and the SDP.
- a computer that delivers content using adaptive streaming technology, A fragment stream generation unit that generates a fragment stream based on source data of the content; An MPD generation unit for generating an MPD in which information necessary for the receiver to acquire the fragment stream to be delivered by the HTTP unicast is described; A unicast delivery unit for HTTP unicast delivery of the MPD and the fragment stream; Information on the FLUTE session for generating the FLUTE stream from the fragment stream and for distributing the FLUTE stream, and the MPD on which information necessary for the receiver to acquire the fragment stream corresponding to the FLUTE stream is described A FLUTE stream generation unit that describes information and generates an SDP; A program that causes the FLUTE stream and the SDP to function as a multicast distribution unit that distributes FLUTE multicast.
- a fragment stream generation unit that generates a fragment stream based on content source data
- An MPD generation unit that generates an MPD in which information necessary for the receiver to acquire the fragment stream to be delivered by HTTP unicast is described
- a unicast delivery unit for HTTP unicast delivery of the MPD and the fragment stream
- Information on the FLUTE session for generating the FLUTE stream from the fragment stream and for distributing the FLUTE stream, and the MPD on which information necessary for the receiver to acquire the fragment stream corresponding to the FLUTE stream is described
- a FLUTE stream generation unit that describes information and generates an SDP
- a terminal apparatus that receives and reproduces the FLUTE stream distributed by FLUTE multicast from a content supply apparatus comprising: a multicast distribution unit that distributes the FLUTE stream and the SDP by FLUTE multicast.
- a terminal apparatus that acquires the SDP distributed by FLUTE multicast and receives the FLUTE stream distributed by FLUTE multicast based on the acquired SDP.
- (11) The terminal device according to (10), wherein the MPD corresponding to the SDP is acquired based on the acquired SDP, and the segment stream distributed by HTTP unicast is acquired based on the acquired MPD.
- the content supply device is A fragment stream generation unit that generates a fragment stream based on content source data;
- An MPD generation unit that generates an MPD in which information necessary for the receiver to acquire the fragment stream to be delivered by HTTP unicast is described;
- a unicast delivery unit for HTTP unicast delivery of the MPD and the fragment stream;
- Information on the FLUTE session for generating the FLUTE stream from the fragment stream and for distributing the FLUTE stream, and the MPD on which information necessary for the receiver to acquire the fragment stream corresponding to the FLUTE stream is described
- a FLUTE stream generation unit that describes information and generates an SDP;
- a multicast distribution unit that distributes the FLUTE stream and the SDP by FLUTE multicast.
- the terminal device is A content supply system for acquiring the SDP distributed by FLUTE multicast and receiving the FLUTE stream distributed by FLUTE multicast based on the acquired SDP.
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Abstract
Description
a=mpd-mapping:<mpd url> <adaptation set id> <representation id> <base url>
とすることができる。
a=single-fmt:<media><encoding name><receive mode>
とすることができる。
a=mpd-mapping:<mpd url> <adaptation set id> <representation id> <base url>
図3は、本開示の実施の形態であるコンテンツ供給システムの構成例を示している。
次に、図4はSDPの記述例を示している。
v= (プロトコルのバージョン)
o= (発信元およびセッション識別子)
s= (セッション名)
i= (セッション情報)
a= (セッション全体にかかわる属性)
t= (セッションがアクティブな時間)
m= (メディア名と伝送アドレス)
c= (接続情報 -- セッションレベルで含める場合はオプション)
b= (0行以上の帯域情報)
a= (メディアに関する属性)
(1)a=single-fmt:<media><encoding name><receive mode>
次に、コンテンツ供給システム50の動作について説明する。
(1)
適応的ストリーミング技術を用いてコンテンツを配信するコンテンツ供給装置において、
前記コンテンツのソースデータを元にしてフラグメントストリームを生成するフラグメントストリーム生成部と、
HTTPユニキャスト配信される前記フラグメントストリームを受信側が取得するために必要な情報を記述したMPDを生成するMPD生成部と、
前記MPDおよび前記フラグメントストリームをHTTPユニキャスト配信するユニキャスト配信部と、
前記フラグメントストリームからFLUTEストリームを生成するとともに、前記FLUTEストリームを配信するFLUTEセッションに関する情報と、前記FLUTEストリームに対応する前記フラグメントストリームを受信側が取得するために必要な情報が記述されている前記MPDに関する情報を記述してSDPを生成するFLUTEストリーム生成部と、
前記FLUTEストリームおよび前記SDPをFLUTEマルチキャスト配信するマルチキャスト配信部と
を備えるコンテンツ供給装置。
(2)
前記FLUTEストリーム生成部は、前記MPDに関する情報を記述するために定義した属性行により、MPDに関する情報を前記SDPに記述する
前記(1)に記載のコンテンツ供給装置。
(3)
前記属性行は、
a=mpd-mapping:<mpd url> <adaptation set id> <representation id> <base url>
である
前記(2)に記載のコンテンツ供給装置。
(4)
前記FLUTEストリーム生成部は、前記属性行の記述要素である<mpd url>、<adaptation set id>、<representation id>、または<base url>のうちの少なくともに一つを前記SDPに記述する
前記(2)または(3)に記載のコンテンツ供給装置。
(5)
前記FLUTEストリーム生成部は、さらに、前記FLUTEストリームを配信する前記FLUTEセッションを受信側が受信する場合の受信モードを記述するために定義した属性行により、前記受信モードを前記SDPに記述する
前記(1)から(4)のいずれかに記載のコンテンツ供給装置。
(6)
前記属性行は、
a=single-fmt:<media><encoding name><receive mode>
である
前記(5)に記載のコンテンツ供給装置。
(7)
前記FLUTEストリーム生成部は、前記受信モードとして、Promiscuous、One-copy、またはKeep-updatedのいずれかを前記属性行の<receive mode>に記述する
前記(5)または(6)に記載のコンテンツ供給装置。
(8)
適応的ストリーミング技術を用いてコンテンツを配信するコンテンツ供給装置のコンテンツ供給方法において、
前記コンテンツ供給装置による、
前記コンテンツのソースデータを元にしてフラグメントストリームを生成するフラグメントストリーム生成ステップと、
HTTPユニキャスト配信される前記フラグメントストリームを受信側が取得するために必要な情報を記述したMPDを生成するMPD生成ステップと、
前記MPDおよび前記フラグメントストリームをHTTPユニキャスト配信するユニキャスト配信ステップと、
前記フラグメントストリームからFLUTEストリームを生成するとともに、前記FLUTEストリームを配信するFLUTEセッションに関する情報と、前記FLUTEストリームに対応する前記フラグメントストリームを受信側が取得するために必要な情報が記述されている前記MPDに関する情報を記述してSDPを生成するFLUTEストリーム生成ステップと、
前記FLUTEストリームおよび前記SDPをFLUTEマルチキャスト配信するマルチキャスト配信ステップと
を含むコンテンツ供給方法。
(9)
適応的ストリーミング技術を用いてコンテンツを配信するコンピュータを、
前記コンテンツのソースデータを元にしてフラグメントストリームを生成するフラグメントストリーム生成部と、
前記HTTPユニキャスト配信される前記フラグメントストリームを受信側が取得するために必要な情報を記述したMPDを生成するMPD生成部と、
前記MPDおよび前記フラグメントストリームをHTTPユニキャスト配信するユニキャスト配信部と、
前記フラグメントストリームからFLUTEストリームを生成するとともに、前記FLUTEストリームを配信するFLUTEセッションに関する情報と、前記FLUTEストリームに対応する前記フラグメントストリームを受信側が取得するために必要な情報が記述されている前記MPDに関する情報を記述してSDPを生成するFLUTEストリーム生成部と、
前記FLUTEストリームおよび前記SDPをFLUTEマルチキャスト配信するマルチキャスト配信部と
して機能させるプログラム。
(10)
コンテンツのソースデータを元にしてフラグメントストリームを生成するフラグメントストリーム生成部と、
HTTPユニキャスト配信される前記フラグメントストリームを受信側が取得するために必要な情報を記述したMPDを生成するMPD生成部と、
前記MPDおよび前記フラグメントストリームをHTTPユニキャスト配信するユニキャスト配信部と、
前記フラグメントストリームからFLUTEストリームを生成するとともに、前記FLUTEストリームを配信するFLUTEセッションに関する情報と、前記FLUTEストリームに対応する前記フラグメントストリームを受信側が取得するために必要な情報が記述されている前記MPDに関する情報を記述してSDPを生成するFLUTEストリーム生成部と、
前記FLUTEストリームおよび前記SDPをFLUTEマルチキャスト配信するマルチキャスト配信部と
を備えるコンテンツ供給装置からFLUTEマルチキャスト配信された前記FLUTEストリームを受信、再生する端末装置において、
FLUTEマルチキャスト配信された前記SDPを取得し、取得した前記SDPに基づいて、FLUTEマルチキャスト配信された前記FLUTEストリームを受信する
端末装置。
(11)
取得した前記SDPに基づいて前記SDPに対応する前記MPDを取得し、取得した前記MPDに基づいて、HTTPユニキャスト配信された前記セグメントストリームを取得する
前記(10)に記載の端末装置。
(12)
コンテンツ供給装置と端末装置から構成されるコンテンツ供給システムにおいて、
前記コンテンツ供給装置は、
コンテンツのソースデータを元にしてフラグメントストリームを生成するフラグメントストリーム生成部と、
HTTPユニキャスト配信される前記フラグメントストリームを受信側が取得するために必要な情報を記述したMPDを生成するMPD生成部と、
前記MPDおよび前記フラグメントストリームをHTTPユニキャスト配信するユニキャスト配信部と、
前記フラグメントストリームからFLUTEストリームを生成するとともに、前記FLUTEストリームを配信するFLUTEセッションに関する情報と、前記FLUTEストリームに対応する前記フラグメントストリームを受信側が取得するために必要な情報が記述されている前記MPDに関する情報を記述してSDPを生成するFLUTEストリーム生成部と、
前記FLUTEストリームおよび前記SDPをFLUTEマルチキャスト配信するマルチキャスト配信部とを備え、
前記端末装置は、
FLUTEマルチキャスト配信された前記SDPを取得し、取得した前記SDPに基づいて、FLUTEマルチキャスト配信された前記FLUTEストリームを受信する
コンテンツ供給システム。
Claims (12)
- 適応的ストリーミング技術を用いてコンテンツを配信するコンテンツ供給装置において、
前記コンテンツのソースデータを元にしてフラグメントストリームを生成するフラグメントストリーム生成部と、
HTTPユニキャスト配信される前記フラグメントストリームを受信側が取得するために必要な情報を記述したMPDを生成するMPD生成部と、
前記MPDおよび前記フラグメントストリームをHTTPユニキャスト配信するユニキャスト配信部と、
前記フラグメントストリームからFLUTEストリームを生成するとともに、前記FLUTEストリームを配信するFLUTEセッションに関する情報と、前記FLUTEストリームに対応する前記フラグメントストリームを受信側が取得するために必要な情報が記述されている前記MPDに関する情報を記述してSDPを生成するFLUTEストリーム生成部と、
前記FLUTEストリームおよび前記SDPをFLUTEマルチキャスト配信するマルチキャスト配信部と
を備えるコンテンツ供給装置。 - 前記FLUTEストリーム生成部は、前記MPDに関する情報を記述するために定義した属性行により、MPDに関する情報を前記SDPに記述する
請求項1に記載のコンテンツ供給装置。 - 前記属性行は、
a=mpd-mapping:<mpd url> <adaptation set id> <representation id> <base url>
である
請求項2に記載のコンテンツ供給装置。 - 前記FLUTEストリーム生成部は、前記属性行の記述要素である<mpd url>、<adaptation set id>、<representation id>、または<base url>のうちの少なくともに一つを前記SDPに記述する
請求項3に記載のコンテンツ供給装置。 - 前記FLUTEストリーム生成部は、さらに、前記FLUTEストリームを配信する前記FLUTEセッションを受信側が受信する場合の受信モードを記述するために定義した属性行により、前記受信モードを前記SDPに記述する
請求項2に記載のコンテンツ供給装置。 - 前記属性行は、
a=single-fmt:<media><encoding name><receive mode>
である
請求項5に記載のコンテンツ供給装置。 - 前記FLUTEストリーム生成部は、前記受信モードとして、Promiscuous、One-copy、またはKeep-updatedのいずれかを前記属性行の<receive mode>に記述する
請求項5に記載のコンテンツ供給装置。 - 適応的ストリーミング技術を用いてコンテンツを配信するコンテンツ供給装置のコンテンツ供給方法において、
前記コンテンツ供給装置による、
前記コンテンツのソースデータを元にしてフラグメントストリームを生成するフラグメントストリーム生成ステップと、
HTTPユニキャスト配信される前記フラグメントストリームを受信側が取得するために必要な情報を記述したMPDを生成するMPD生成ステップと、
前記MPDおよび前記フラグメントストリームをHTTPユニキャスト配信するユニキャスト配信ステップと、
前記フラグメントストリームからFLUTEストリームを生成するとともに、前記FLUTEストリームを配信するFLUTEセッションに関する情報と、前記FLUTEストリームに対応する前記フラグメントストリームを受信側が取得するために必要な情報が記述されている前記MPDに関する情報を記述してSDPを生成するFLUTEストリーム生成ステップと、
前記FLUTEストリームおよび前記SDPをFLUTEマルチキャスト配信するマルチキャスト配信ステップと
を含むコンテンツ供給方法。 - 適応的ストリーミング技術を用いてコンテンツを配信するコンピュータを、
前記コンテンツのソースデータを元にしてフラグメントストリームを生成するフラグメントストリーム生成部と、
前記HTTPユニキャスト配信される前記フラグメントストリームを受信側が取得するために必要な情報を記述したMPDを生成するMPD生成部と、
前記MPDおよび前記フラグメントストリームをHTTPユニキャスト配信するユニキャスト配信部と、
前記フラグメントストリームからFLUTEストリームを生成するとともに、前記FLUTEストリームを配信するFLUTEセッションに関する情報と、前記FLUTEストリームに対応する前記フラグメントストリームを受信側が取得するために必要な情報が記述されている前記MPDに関する情報を記述してSDPを生成するFLUTEストリーム生成部と、
前記FLUTEストリームおよび前記SDPをFLUTEマルチキャスト配信するマルチキャスト配信部と
して機能させるプログラム。 - コンテンツのソースデータを元にしてフラグメントストリームを生成するフラグメントストリーム生成部と、
HTTPユニキャスト配信される前記フラグメントストリームを受信側が取得するために必要な情報を記述したMPDを生成するMPD生成部と、
前記MPDおよび前記フラグメントストリームをHTTPユニキャスト配信するユニキャスト配信部と、
前記フラグメントストリームからFLUTEストリームを生成するとともに、前記FLUTEストリームを配信するFLUTEセッションに関する情報と、前記FLUTEストリームに対応する前記フラグメントストリームを受信側が取得するために必要な情報が記述されている前記MPDに関する情報を記述してSDPを生成するFLUTEストリーム生成部と、
前記FLUTEストリームおよび前記SDPをFLUTEマルチキャスト配信するマルチキャスト配信部と
を備えるコンテンツ供給装置からFLUTEマルチキャスト配信された前記FLUTEストリームを受信、再生する端末装置において、
FLUTEマルチキャスト配信された前記SDPを取得し、取得した前記SDPに基づいて、FLUTEマルチキャスト配信された前記FLUTEストリームを受信する
端末装置。 - 取得した前記SDPに基づいて前記SDPに対応する前記MPDを取得し、取得した前記MPDに基づいて、HTTPユニキャスト配信された前記セグメントストリームを取得する
請求項10に記載の端末装置。 - コンテンツ供給装置と端末装置から構成されるコンテンツ供給システムにおいて、
前記コンテンツ供給装置は、
コンテンツのソースデータを元にしてフラグメントストリームを生成するフラグメントストリーム生成部と、
HTTPユニキャスト配信される前記フラグメントストリームを受信側が取得するために必要な情報を記述したMPDを生成するMPD生成部と、
前記MPDおよび前記フラグメントストリームをHTTPユニキャスト配信するユニキャスト配信部と、
前記フラグメントストリームからFLUTEストリームを生成するとともに、前記FLUTEストリームを配信するFLUTEセッションに関する情報と、前記FLUTEストリームに対応する前記フラグメントストリームを受信側が取得するために必要な情報が記述されている前記MPDに関する情報を記述してSDPを生成するFLUTEストリーム生成部と、
前記FLUTEストリームおよび前記SDPをFLUTEマルチキャスト配信するマルチキャスト配信部とを備え、
前記端末装置は、
FLUTEマルチキャスト配信された前記SDPを取得し、取得した前記SDPに基づいて、FLUTEマルチキャスト配信された前記FLUTEストリームを受信する
コンテンツ供給システム。
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020207002787A KR102123208B1 (ko) | 2013-09-27 | 2014-09-12 | 콘텐츠 공급 장치, 콘텐츠 공급 방법, 프로그램, 단말 장치, 및 콘텐츠 공급 시스템 |
KR1020167007957A KR102073871B1 (ko) | 2013-09-27 | 2014-09-12 | 콘텐츠 공급 장치, 콘텐츠 공급 방법, 프로그램, 단말 장치, 및 콘텐츠 공급 시스템 |
US15/024,895 US10305953B2 (en) | 2013-09-27 | 2014-09-12 | Content supplying apparatus, content supplying method, program, terminal device, and content supplying system |
MX2016003750A MX364745B (es) | 2013-09-27 | 2014-09-12 | Dispositivo de suministro de contenido, método de suministro de contenido, programa, dispositivo de terminal y sistema de suministro de contenido. |
EP14848207.8A EP3051830B1 (en) | 2013-09-27 | 2014-09-12 | Content supply device, content supply method, program, receiving device, and content supply system |
CA2925455A CA2925455C (en) | 2013-09-27 | 2014-09-12 | Content supplying apparatus, content supplying method, program, terminal device, and content supplying system |
US16/393,508 US10623463B2 (en) | 2013-09-27 | 2019-04-24 | Content supplying apparatus, content supplying method, program, terminal device, and content supplying system |
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JP2020162090A (ja) * | 2019-03-28 | 2020-10-01 | 日本電気株式会社 | 送信ノード、放送局システム、制御ノード及び送信制御方法 |
JP2020162087A (ja) * | 2019-03-28 | 2020-10-01 | 日本電気株式会社 | 送信ノード、放送局システム、制御ノード及び送信制御方法 |
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CN103959798B (zh) | 2011-09-30 | 2018-06-08 | 英特尔公司 | 无线网络上的体验质量增强 |
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JP2020162090A (ja) * | 2019-03-28 | 2020-10-01 | 日本電気株式会社 | 送信ノード、放送局システム、制御ノード及び送信制御方法 |
JP2020162087A (ja) * | 2019-03-28 | 2020-10-01 | 日本電気株式会社 | 送信ノード、放送局システム、制御ノード及び送信制御方法 |
JP7247707B2 (ja) | 2019-03-28 | 2023-03-29 | 日本電気株式会社 | 送信ノード、放送局システム、制御ノード及び送信制御方法 |
JP7247706B2 (ja) | 2019-03-28 | 2023-03-29 | 日本電気株式会社 | 送信ノード、放送局システム、制御ノード及び送信制御方法 |
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EP3051830A1 (en) | 2016-08-03 |
KR20160060056A (ko) | 2016-05-27 |
EP3051830B1 (en) | 2018-06-13 |
US10305953B2 (en) | 2019-05-28 |
CA2925455A1 (en) | 2015-04-02 |
MX2019005174A (es) | 2019-08-12 |
MX2016003750A (es) | 2016-07-05 |
KR102073871B1 (ko) | 2020-02-05 |
KR102123208B1 (ko) | 2020-06-15 |
EP3051830A4 (en) | 2017-04-05 |
MX364745B (es) | 2019-05-06 |
US20190253472A1 (en) | 2019-08-15 |
US10623463B2 (en) | 2020-04-14 |
US20160294904A1 (en) | 2016-10-06 |
CA2925455C (en) | 2021-12-14 |
JP2015070427A (ja) | 2015-04-13 |
KR20200013112A (ko) | 2020-02-05 |
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