WO2015012140A1 - Content supply device, content supply method, program, terminal device, and content supply system - Google Patents

Content supply device, content supply method, program, terminal device, and content supply system Download PDF

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Publication number
WO2015012140A1
WO2015012140A1 PCT/JP2014/068678 JP2014068678W WO2015012140A1 WO 2015012140 A1 WO2015012140 A1 WO 2015012140A1 JP 2014068678 W JP2014068678 W JP 2014068678W WO 2015012140 A1 WO2015012140 A1 WO 2015012140A1
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Prior art keywords
stream
zapping
metadata
viewing
content
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PCT/JP2014/068678
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French (fr)
Japanese (ja)
Inventor
山岸 靖明
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ソニー株式会社
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television, VOD [Video On Demand]
    • H04N21/20Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/238Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television, VOD [Video On Demand]
    • H04N21/20Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/234Processing of video elementary streams, e.g. splicing of content streams, manipulating MPEG-4 scene graphs
    • H04N21/2343Processing of video elementary streams, e.g. splicing of content streams, manipulating MPEG-4 scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
    • H04N21/23439Processing of video elementary streams, e.g. splicing of content streams, manipulating MPEG-4 scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements for generating different versions
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television, VOD [Video On Demand]
    • H04N21/80Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
    • H04N21/83Generation or processing of protective or descriptive data associated with content; Content structuring
    • H04N21/845Structuring of content, e.g. decomposing content into time segments
    • H04N21/8456Structuring of content, e.g. decomposing content into time segments by decomposing the content in the time domain, e.g. in time segments

Abstract

The present disclosure relates to a content supply device that enables the realization of fast zapping during streaming. The present disclosure also relates to a content supply method, a program, a terminal device, and a content supply system. The content supply device of the present disclosure generates a zapping stream on the basis of content source data, generates zapping metadata for reception of the zapping stream, generates, on the basis of the content source data, an audiovisual stream, the segment length of which is longer than the segment length of the zapping stream, and generates audiovisual metadata for reception of the audiovisual stream. Then the zapping metadata, the audiovisual metadata, the zapping stream, and the audiovisual stream are multicast distributed over a network. The present disclosure is applicable to a streaming distribution system for content.

Description

Contents supply apparatus, the content supply method, the program, the terminal device, and a content supply system

The present disclosure, the contents supply apparatus, the content supply method, the program, the terminal device, and to a content providing system, in particular, rapidly contents supply apparatus capable of switching a stream, content providing method, program, terminal apparatus, and content supply about the system.

Internet as video distribution protocol standardized internationally available to video delivery via, MPEG-DASH using viewing the same HTTP unicast delivery, such as Web site (Moving Picture Experts Group-Dynamic Adaptive Streaming over HTTP, or less, DASH referred to as) it is known (for example, see non-Patent Document 1).

Adaptive streaming technology has been implemented in DASH. That is, the supply side of the content in the DASH as content corresponding, to prepare a plurality of streams such as the image quality and the field angle size is changed according to the communication environment and the reception side capability and state of delivery path It has been made. On the other hand, the receiving side, among a plurality of streams supply side is prepared, received by selecting an optimal stream depending on its decoding capability itself a receivable is adapted to reproduce.

Thus, in the DASH, receiver so that it can receive adaptively selected and the stream, metadata called MPD (Media Presentation Description) is supplied to the receiving side from the supply side.

MPD, the chunking segment stream (Audio / Video / media data such as Subtitle) suppliers become WEB server address of the content (url information) is described. The receiving side based on the url information, sends an HTTP request to the WEB server as a supply source of the content, the WEB server in response to the HTTP request received segments streams to unicast distribution, it will be reproduced.

Figure 1 shows an example of a configuration of a content supply system for distributing segment stream content based on the DASH.

The content supply system 10, (in this case, 20A, 20B, 20C) a plurality of contents supply apparatus 20 of the side for supplying the content and, composed of many DASH client 30 on the side that receives the content. The contents supply apparatus 20 and the DASH client 30 are connected via the Internet 11. On the Internet 11, CDN (Contents Delivery Network) 12 is present.

Contents supply apparatus 20A, the bit rate to deliver different segments streams a content corresponding as a channel A. Contents supply apparatus 20B, which is the same for 20C. However, the content supply device 20A, 20B, 20C, it is assumed that the contents each of which delivers a different content. Hereinafter, the contents supply apparatus 20A, 20B, when it is not necessary to identify them individually 20C, simply referred to as a contents supply apparatus 20.

Contents supply apparatus 20 has the content management server 21, DASH segment streamer 22, and DASH MPD server 23.

Content Management server 21 manages the source data of content for delivery to DASH client 30, the bit rate from the source data of content and outputs the DASH segment streamer 22 to generate a plurality of different streaming data.

DASH segment streamer 22, each streaming data by temporally divided into segments (by chunking) generating a segment stream. Further, DASH segment streamer 22, the segment stream and holds the filed, as WEB server, in response to a request from the DASH client 30 (HTTP request), the file of the segment stream, DASH client 30 requesting via the CDN12 to HTTP unicast distribution to. Furthermore, DASH segment streamer 22 notifies the source address of the file segment stream to DASH MPD server 23.

DASH MPD server 23 generates an MPD of DASH client 30 is required in order to obtain the file of the segment stream, such as an address indicating the source of the file segment stream is described. Further, DASH MPD server 23 as WEB server, in response to a request from the DASH client 30 (HTTP request), the resulting MPD to HTTP unicast distribution to the requesting DASH client 30 via the CDN12.

DASH client 30 requests the MPD against DASH MPD server 23 receives the HTTP unicast delivered MPD accordingly. Furthermore, DASH client 30, based on the MPD received, it requests the file segment stream DASH segment streamer 22, receiving the file segments streams HTTP unicast distribution accordingly, play.

The cache server is provided, not illustrated in CDN12. Cache server caches file MPD or segment stream HTTP unicast delivery via CND12. Then, instead of DASH MPD server 23 or DASH segment streamer 22 as WEB server and HTTP unicast distribution files MPD or segment streams are cached against DASH client 30 that has sent the HTTP request to the requester.

"The video distribution uninterrupted in the existing Web server implementation", Mitsuhiro Hirabayashi, NIKKEI ELECTRONICS 2012.3.19

As described above, the content supply system 10 utilizing DASH, a plurality of channels (the contents supply apparatus 20A, 20B, 20C) by is prepared, the content to the receiving side a plurality of different contents at the same time distribution It has been and can be.

Thus, if you can supply different contents a plurality of contents at the same time, the user of the DASH client 30 as if to view television broadcasts, view by switching the channels one after another within the zapping phase (short via the state) to look for content, it is envisioned that moves the viewing phase (state view content without zapping).

The switching between channels in DASH (switching) is performed in the sub-segment unit which is more granular per-segment or segments. Hereinafter, switching between channels in DASH continues the explanation as being performed in segments.

2 and 3, each channel of a content providing system 10 using DASH (A, B, C) at the respective, at a by the three different bit rate segment stream (Representation) is a deliverable same content it is shown that there is. Bold arrow in the figure shows an example of transition of switching when zapping between channels. Incidentally, the width of the band indicating the segment streams difference represents the magnitude of the bit rate.

Note that now, segment length of a segment stream at DASH (time length) of each channel can be arbitrarily determined. Therefore, the segment length of the segment stream each channel delivers is not necessarily coincide. The reproduction start time of the beginning of the segment of the segment stream each channel delivers is not defined as particular match.

2, the segment length is not consistent between channels, and an example of the case where the reproduction start time of the beginning of the segment of the segment stream does not match.

For Figure 2, when the user of the DASH client 30 instructs the switching (zapping) to RepresentationB2 viewing while DASH client channel to T1 time axis B the RepresentationA2 of channel A, the timing of the actual switching of RepresentationB2 until the segment is delimited T2 is delayed. Thereafter, when an instruction to switching to RepresentationC2 channel C and before the T3 while view RepresentationB2 of channel B is also the timing of the actual switching is delayed until T4 is separated segments of RepresentationC2.

3, although the reproduction start time of the beginning of the segment of the segment stream between channels match in synchronization with the NTP time axis, an example in which the segment lengths do not match between the channels.

For Figure 3, when a user of the DASH client 30 instructs the switching to RepresentationB2 channel B until T1 of the NTP time axis while viewing the RepresentationA2 of channel A, the timing of the actual switching is separated segments of RepresentationB2 It is delayed until T2. Thereafter, when an instruction to switching to RepresentationC2 and before the channel C of T3 with view RepresentationB2 of channel B, the timing of the actual switching is delayed until T4 is separated segments of RepresentationC2.

As shown in FIGS. 2 and 3, when switching the segment stream between channels of a content providing system 10 using DASH is extra delay may occur for that instruction. Thus, for an instruction of switching can not be performed quickly zapping the actual switching is delayed. Therefore, there is a need for some measures.

The present disclosure has been made in view of such circumstances, it is to be able to realize a quick zapping.

Content supplying apparatus according to a first aspect of the present disclosure, in accordance with adaptive streaming technology, the content supply device for supplying a plurality of streams whose content is the bit rate of the same content different in the same channel, the source of the content the basis of the first stream generation unit that generates a stream for zapping on the basis of the data, the first metadata generating unit for generating a zapping metadata for receiving the zapping stream, the source data of the content generating a minimum and a second stream generation unit length of the unit to generate long view for stream viewing metadata for receiving said viewing for stream when switching streams than the zapping stream Te a second meta-data generating unit, the miscellaneous Comprising grayed metadata, the viewing metadata, the zapping stream, and a multicast distribution unit the viewing stream for multicasting over a network.

The multicast distribution unit, the zapping metadata, the viewing metadata, the zapping stream, and the viewing stream for (e) may be FLUTE multicast distribution through the MBMS.

The metadata and the viewing metadata for zapping can be USD, MPD, and combinations of SDP or OMA-ESG,, USD, MPD, and a combination of SDP.

It said first stream generator based on the source data of the content, the stream can be the length of the smallest unit of time of switching the generating a sufficiently short stream, the first metadata generating unit can stream corresponding to the zapping metadata describes information indicating that available for zapping application metadata for the zapping.

Said first stream generator based on the source data of the content, delimiting a minimum unit when switching streams has NTP synchronization, the length of the minimum unit is unified with the other channels It can generate zapping stream, the first meta-data generating unit, the information stream corresponding to said zapping metadata indicating that available stream Applications for the zapping, the minimum unit delimiters NTP synchronization it can be information indicating that they are or the length of the minimum unit, to describe at least one of information indicating that it is unified with the other channels in the metadata for the zapping.

Said second stream generator divides the minimum unit when switching streams has NTP synchronization, the length of the minimum unit, of the zapping stream generated by the first stream generator wherein it is possible to produce a minimum unit of an integral multiple of the view for the stream, wherein the first metadata generation unit is further said second stream generator against zapping stream corresponding to the zapping metadata from the view for stream generated, it is possible to write information indicating that it is possible to switch which does not cause asymmetrically extra delay in only one direction in the metadata for the zapping, the second meta data generating unit, the raw by the first stream generator from view for the stream corresponding to the view for the metadata To the zapping stream can describe information indicating that it is possible to switch which does not cause asymmetrically extra delay in only one direction in the metadata for the viewing.

Content supplying apparatus according to a first aspect of the present disclosure, the zapping metadata, and the viewing metadata may further include a unicast delivery unit for unicast distribution over the network.

Content supplying method which is the first aspect of the present disclosure, in accordance with adaptive streaming technology, the content providing method of the content supply device for supplying contents to the same plurality of streams comprising the bit rates are different in content on the same channel, by the contents supply apparatus, and generates a stream for zapping based on the source data of the content, a longer viewing length of minimum unit when switching streams than the zapping stream based on the source data of the content and a stream generation step of generating a use stream, to generate a zapping metadata for receiving the zapping stream, the metadata generation stearyl for generating a viewing metadata for receiving said viewing for stream Including a flop, the zapping metadata, the viewing metadata, and multicast distribution step of multicasting via the zapping stream, and the viewing stream for network.

Program is a first aspect of the present disclosure, in accordance with adaptive streaming technology, the computer supplies content the same content in a the bit rate is different streams in the same channel, based on the source data of the content a first stream generator for generating a zapping stream, a first metadata generating unit for generating a zapping metadata for receiving the zapping stream, for the zapping based on the source data of the content second meta generating a second stream generation unit length of the minimum unit when switching streams than the stream to produce a long view for stream viewing metadata for receiving said viewing for stream a data generating unit, the zapping metadata, before Viewing metadata, the zapping stream, and the to function for viewing the stream as a multicast distribution unit for multicasting over a network.

In the first aspect of the present disclosure, based on the source data of the content is generated zapping stream, zapping metadata for receiving the zapping stream is generated. Further, the length of the minimum unit when switching streams than the zapping stream based on the source data of the content is long view for the stream is generated, for viewing the metadata for receiving said viewing a stream It is generated. Moreover, the zapping metadata, the viewing metadata, the zapping stream, and the viewing for the stream is multicast distribution through a network.

Terminal apparatus according to a second aspect of the present disclosure, in accordance with adaptive streaming technology, the stream contents supplied from the content supply device for supplying a plurality of identical streams comprising the bit rates are different in content on the same channel in incoming terminal apparatus, the content supply device generates a first stream generation unit that generates a stream for zapping, zapping metadata for receiving the zapping stream based on the source data of the content a first meta-data generating unit, and a second stream generation unit length of the minimum unit when switching streams than the zapping stream based on the source data of the content to generate long for viewing stream, for receiving said viewing for stream A second meta-data generating unit that generates 聴用 metadata, the zapping metadata, the viewing metadata, a multicast distribution portion in which the zapping stream, and the viewing stream for multicasting over the network the provided, to retrieve metadata for the zapping, receiving a stream for the zapping based on the acquired zapping metadata, reproduces, acquires the viewing metadata, the acquired viewing metadata receiving said viewing for stream based, to play.

In the second aspect of the present disclosure, the acquired zapping metadata, the zapping stream received based on the obtained the zapping meta data, while being reproduced, the viewer meta data is acquired, based on said acquired the viewing metadata was viewed for streams received and reproduced.

Content providing system according to a third embodiment of the present disclosure, adaptive accordance streaming technology, content and content supply device for supplying a plurality of streams comprising the bit rates are different the same content on the same channel, it receives the stream in the content supply system comprising a terminal device, the content supply device, a first stream generating unit that generates a stream for zapping based on the source data of the content, for zapping for receiving the zapping stream a first metadata generator for generating metadata, the second length of the minimum unit when switching streams than the zapping stream based on the source data of the content to generate a long view for stream and a stream generation unit, A second meta-data generating unit that generates a view for metadata for receiving serial for viewing stream, the zapping metadata, the viewing metadata, the zapping stream, and the network the viewing stream for through and a multicast distribution unit for multicast delivery. Then, the terminal device acquires the metadata for the zapping, receiving a stream for the zapping based on the acquired zapping metadata, reproduces, acquires the viewing metadata, acquired the viewing receiving said viewing for stream based on use metadata to play.

In a third aspect of the present disclosure, the contents supply apparatus, based on the source data of the content is generated zapping stream, the metadata for zapping for receiving the zapping stream is generated. Further, the length of the minimum unit when switching streams than the zapping stream based on the source data of the content is long view for the stream is generated, for viewing the metadata for receiving said viewing a stream It is generated. Moreover, the zapping metadata, the viewing metadata, the zapping stream, and the viewing for the stream is multicast distribution through a network. Further, the terminal device is acquired zapping metadata, the zapping stream received based on the obtained the zapping meta data, while being reproduced, the viewer meta data is acquired, the acquired the viewing for stream received and reproduced on the basis of viewing metadata.

According to an aspect of the first to third present disclosure, it is possible to realize a quick zapping.

Is a block diagram showing an example of a configuration of a conventional content delivery system. Is a diagram illustrating the delay caused by switching between channels. Is a diagram illustrating the delay caused by switching between channels. The present disclosure from each channel of the applied contents supply system is a view for explaining the relationship of zapping segment stream delivered respectively. It is a graph illustrating the relationship between viewing a segment stream and zapping segment stream delivered by each channel of the applied content supply system of the present disclosure. It is a block diagram showing a configuration example of an application content supply system of the present disclosure. Is a diagram showing the flow of data in the zapping phase. Is a diagram showing the flow of data in the viewing phase. (E) is a diagram showing an arrangement of a Service Announcement & Metadata in MBMS. It is a diagram showing a USD data model. It is a diagram showing a first example of the description of USD. Is a diagram showing an outline of a first example of the description of USD. It is a diagram showing a second example of the description of USD. Is a diagram showing an outline of a second example of the description of USD. It is a diagram showing a third description example of the USD. Is a diagram showing an outline of a third example of the description of USD. It is a diagram showing a data model of the OMA-ESG. It is a diagram showing a first example of the description of OMA-ESG. Is a diagram showing an outline of a first example of the description of OMA-ESG. It is a diagram showing a second example of the description of OMA-ESG. Is a diagram showing an outline of a second example of the description of OMA-ESG. It is a diagram showing a third description example of OMA-ESG. It is a diagram showing a third description example of OMA-ESG. Is a diagram showing an outline of a third example of the description of OMA-ESG. It is a flowchart illustrating processing of a content providing device. It is a flowchart illustrating a processing series of the content supply system. It is a block diagram showing a configuration example of a computer.

Hereinafter, best mode for carrying out the present disclosure will be described (hereinafter, referred to as embodiments), before that, the outline of the present disclosure.

Figure 4 is a segment stream for zapping phase delivered at each channel of a content providing system which is an embodiment of the present disclosure (hereinafter, referred to as zapping segment stream) to indicate the segment length. Bold arrow in the figure shows an example of transition of switching when zapping between channels. The difference of the width of the bands showing the zapping segment stream represents the magnitude of the bit rate.

In the example of the drawing, it shows that the channel A, B, at C, 3 pieces of zapping segment streams different bit rates (Representation) are prepared. Further, although not shown in FIG. 4, the channels A, B, C, further, a same content as the zapping segment stream, segment length for long viewing phase than zapping segment stream segment stream ( hereinafter referred to as viewing a segment stream) also has a plurality prepared. Note that the view for the segment stream, described later with reference to FIG.

In the content supply system according to the present disclosure, to unify the separated segments of zapping segment stream with synchronized to NTP time axis, the segment length of zapping segment stream of each channel belonging to the same group to a common time length They are determined to. Moreover, it is determined so as to match the origin of the media playback time of the start segment of the zapping segment stream (MPD / @ availabilityStartTime + Period / @ start) on NTP time axis.

By determining in this way, switching of the zapping segment stream between channels belonging to the same group, namely the zapping, it is made to be able to perform without causing extra delay.

Specifically, as examples of the transition indicated by the thick arrow in FIG. 4, when the viewer instructs the switching to RepresentationB2 viewing while DASH client channel to T1 time axis B the RepresentationA2 of channel A the actual switching is performed T1 which is also a separator RepresentationB2 segment of a separated segment of RepresentationA2.

The switching to RepresentationC2 channels to T2 while view RepresentationB2 channel B C is when prompted, the actual switching is performed T2 which is also the separator RepresentationC2 segment of a separated segment of RepresentationB2.

Furthermore, switching while view RepresentationC2 channel C until T3 to RepresentationA2 of channel A when prompted, the actual switching is performed T3 which is also a separator RepresentationA2 segment of a separated segment of RepresentationC2.

Next, FIG. 5 shows the relationship between viewing a segment stream and zapping segment stream is provided in each channel of the applied content supply system of the present disclosure. The difference of the width of the bands showing the viewing for segment stream and zapping segment streams each of which represents the magnitude of the bit rate.

Incidentally, it is assumed that the FIG. 4 channels are prepared zapping segment streams respectively present 3, 5, two zapping segment stream in each channel (only in Fig. 5 Channel A) It is assumed to prepare the five view for segment stream if. However, the number of the view for the segment stream and zapping segment stream each channel provided is arbitrary, zapping segment stream 1 or more, for viewing segment stream is desirably prepared two or more.

As shown in FIG. 5, separated segments of view for the segment stream and zapping segment stream of each channel is synchronized to the NTP time axis. The segment length of view for segment stream (the case of FIG. 5, three times) of the segment length zapping segment streams of the same channel integral multiples are.

Thus, for the same channel zapping segment stream from the view for the segment stream, asymmetrically in one direction only, thereby enabling switching that does not result in extra delay. Although switching even for viewing for the segment stream from the zapping segment streams of the same channel is possible, extra delay may occur in that case.

Then, defined by applying the content supply system of the present disclosure, zapping segment stream and view a segment stream, and metadata such as MPD for receiving them, a mobile phone communication network (3GPP (3rd Generation Partnership Project) It is assumed to be FLUTE multicast distribution through a broadcast multicast channel of which (e) MBMS (evolved Multimedia broadcast multicast Service), etc.). However, metadata such as the MPD, to allow HTTP unicast delivery through (e) MBMS interaction channel.

Hereinafter, the zapping segment stream and view a segment stream is FLUTE multicast distribution, also called respectively for zapping FLUTE stream or viewer for FLUTE stream.

On the receiving side, and obtains the metadata for zapping initially receive FLUTE stream for zapping based on the metadata, the zapping phase of play. Even acquires metadata for viewing during the zapping phase, receive a FLUTE stream for viewing, it operates to adjust the posture that can transition to the viewing phase to be reproduced.

[Configuration example of a content supply system]
Figure 6 shows an example of the configuration of a content supply system which is an embodiment of the present disclosure.

The content supply system 50, the channel X (X = A, B, ···) a plurality of contents supply apparatus 60X which corresponds to, and a plurality of terminal devices 80. Content supply device 60X and the terminal device 80 are connected via a network 51.

Here, the network 51 is two-way communication network typified by the Internet, but is intended to cover various broadcasting network, in this embodiment, it is assumed that in particular are defined by 3GPP (e) MBMS .

Network 51, NTP server 52 to provide a system time information in accordance with the UTC time format exists. Each contents supply apparatus 60 and the terminal device 80, in accordance with the system time information provided from the NTP server 52, respectively, it assumed to operate to synchronize its system time to NTP time axis.

Network 51 (e) MBMS includes a interaction channel for bidirectional communication, a broadcast multicast channel for performing one-way communication.

(E) MBMS interaction channel is utilized for HTTP unicast delivery of metadata, such as MPD required to receive segment stream and view a segment stream for zapping. (E) MBMS broadcast multicast channel is used for zapping segment stream and view a segment stream, and the FLUTE multicast distribution of metadata, such as MPD.

Contents supply apparatus 60A corresponding to channel A, channel server 61, zapping segmenter 62, zapping metadata generator 63, for viewing segmenter 64, for viewing the metadata generator 65, FLUTE streamer 66, WEB server 67 and the multicast server, with a 68.

The channel server 61 to the multicast server 68 having the contents supply apparatus 60A may be arranged to be integrated, or may be arranged in a dispersed over the Internet.

7 and 8 show the flow of various data between the channel server 61 to the multicast server 68. Note that FIG. 7 is of zapping face, FIG. 8 is a viewing phase.

Channel server 61 manages the source data of the contents distributed from channel A, the same contents from the source data bit rates different one or more streaming data and two or more for zapping viewing streaming data generated. Furthermore, channel server 61 outputs the streaming data zapping zapping segmenter 62, and outputs a viewing streaming data to viewing for segmenter 64.

Zapping segmenter 62 divides the streaming data for zapping temporally period, by further dividing into segments (segment), and outputs the FLUTE streamer 66 to generate a zapping segment streams such FragmentedMP4. Segment length zapping segment stream is a common and zapping segment stream of the other channels belonging to the same group, it is unified in the time length shorter than the segment length of view for the segment stream to be described later. Incidentally, zapping segmenter 62, so operates in synchronization with the NTP time axis becomes to delimit segments of zapping segment stream is also synchronized with the NTP time axis.

Instead of generating a zapping segment above stream to the zapping segmenter 62, the segment length is sufficiently short (e.g., playback time 2 seconds or less) may be generated a segment stream. This segment stream, since the delay that may occur during the switching is reduced, can be used for zapping application.

Furthermore, zapping segmenter 62 notifies and data range for each segment in the generated by the zapping segment stream file to zapping metadata generator 63.

Zapping metadata generator 63, the zapping segment stream metadata (hereinafter, referred to as zapping metadata) such as MPD required to receive the terminal device 80 to the FLUTE streamer 66 and the WEB server 67 to generate Output.

Metadata for zapping, USD (User Service Description), MPD (Media Presentation Description), and combinations of SDP (Service Description Protocol) or OMA-ESG (Open Mobile Alliance-Electronic Service Guide),, USD, MPD, and SDP consisting of a combination of.

For viewing segmenter 64 outputs the FLUTE streamer 66 to generate a view for segment stream such fragmentedMP4 from viewing streaming data. Furthermore, for viewing segmenter 64 notifies the like data range of each segment in the file of the generated view for segment stream for viewing metadata generator 65.

Viewing metadata generator 65, the view for the segment stream metadata, such as MPD required to receive the terminal device 80 (hereinafter, referred to as viewing metadata) in FLUTE streamer 66 and the WEB server 67 to generate Output.

Viewing metadata, like zapping metadata configured USD, MPD, and combinations of SDP or OMA-ESG,, USD, MPD, and combinations SDP.

FLUTE streamer 66 outputs the multicast server 68 generates a FLUTE stream for zapping by storing the zapping segment stream input from the zapping segmenter 62 to FLUTE packet. Further, FLUTE streamer 66 outputs the multicast server 68 generates a FLUTE stream for viewing by storing the view for segment stream input from viewing a segmenter 64 to FLUTE packet. Further, FLUTE streamer 66 outputs the viewing metadata inputted from the zapping metadata and viewing metadata generator 65 inputted from the zapping metadata generator 63 to the multicast server 68.

WEB server 67 in response to a request from the terminal device 80 (HTTP request), the metadata or viewing metadata for zapping, to HTTP unicast distribution to the requesting via the network 51.

Multicast server 68, the metadata and viewing metadata for zapping, to FLUTE multicast distribution through a network 51. Further, the multicast server 68, a FLUTE stream and viewing for FLUTE stream for zapping, to FLUTE multicast distribution through a network 51.

Contents supply apparatus 60B corresponding to the channel B, because it is configured similarly to the contents supply apparatus 60A, a description thereof will be omitted.

[Well-known of FLUTE multicast delivery of portal channel]
Well known portal channel FLUTE multicast distribution to the terminal device 80, (e) or the MBMS USD is utilized, or OMA-ESG and USD are used in combination.

First, the known portal channel FLUTE multicast distribution to the terminal apparatus 80, a description will be given of a method of using (e) MBMS in USD.

USD is delivered is stored in the Service Announcement & Metadata of (e) MBMS.

Figure 9 shows the arrangement of the Service Announcement & Metadata in (e) MBMS. Service Announcement & Metadata91 is disposed (e) MBMS interaction channel and broadcast multicast channel. Accordingly, USD together with the HTTP unicast distribution by interaction channel is FLUTE multicast distribution in broadcast multicast channel. However, delivery of USD is may even one FLUTE multicast delivery in HTTP unicast delivery, or broadcast multicast channel on the interaction channel.

Note that in (e) MBMS, FLUTE stream and viewing for FLUTE stream for zapping, Donload 3GPP file format of Broadcast Multicast channel, Binary data, Still images, Text, stored in etc.92 is FLUTE multicast delivery.

Figure 10 is a data model of the USD to be stored in the Service Announcement & Metadata91, this embodiment relates to the particular User Service Bundle Description101, User Service Description102, Delivery Method103, Session Description104, and media Presentation Description105.

Figure 11 shows a first example of the description of USD. The first description example, the corresponding FLUTE stream is applied in the case of those available for zapping application (one segment length is sufficiently short).

Specifically, the class name to serviceClass as flags attribute indicates a FLUTE stream available for zapping is introduced to define the "urn:: streamType forZapping". If this is described, FLUTE stream described by this userServiceDescription metadata indicating that the segment length is available for zapping application sufficiently small.

Figure 12 shows an outline of a first example of the description of USD in FIG. bundleDescription / userServiceDescription / @ r7: serviceClass = "urn: streamType: forZapping" indicates that the corresponding FLUTE stream can be used to zapping applications. The userServiceDescription / deliveryMethod / @ sessionDescriptionURI, get the URL of the SDP is described. The SDP, IP address and port of the corresponding FLUTE stream is described. The userServiceDescription / mediaPresentationDescription / @ mpdURI, get the URL of the MPD is described. The AdaptationSet / Representation of the MPD, the arrangement of each segment in the corresponding FLUTE stream is described.

Figure 13 shows a second example of the description of USD. The second description example, a corresponding plurality of FLUTE streams FLUTE stream for zapping respectively, applied to the case is a relationship that can switch without causing extra delay to each other (the relationship shown in FIG. 4) It is.

Specifically, in addition to the first described embodiment, directly under the BundleDescription, introducing NTPSynchronized and SegmentAligned. bundleDescription / @ NTPSynchronized is zapping segmenter 62 of each channel (contents supply apparatus 60) belonging to the same group are operated at NTP synchronization, i.e., separated segments of FLUTE stream of each channel in synchronization with the NTP time axis indicating that you are. bundleDescription / @ SegmentAligned represents that the segment length of a segment of FLUTE stream of each channel is unified.

Figure 14 shows the outline of the second example of the description of USD in FIG. bundleDescription the NTPSynchronized and SegmentAligned was introduced immediately below is used two the zapping stream to grouping describing userServiceDescription group respectively.

bundleDescription / @ NTPSynchronized if (boolean type) is true, indicating that the delimiter of a segment of each FLUTE stream described in userServiceDescription group is NTP synchronization. Moreover, indicating that bundleDescription / @ SegmentAligned '(boolean type) If true, segment length of a segment of each FLUTE stream described in userServiceDescription group is unified. For the second description example, delimiting a segment of FLUTE stream shown in FLUTE stream and circle 2 shown by a circle 1 in the drawing is not NTP synchronization, and indicates that the segment length match.

Figure 15 shows a third example of the description of USD. The third description example, the zapping FLUTE stream between the corresponding is a relationship that can switch without causing extra delay to each other (the relationship shown in FIG. 4), further, zapping from a corresponding view for stream for use FLUTE stream, asymmetrically in one direction, it is applied when a can switch without causing extra delay relationship (relationship shown in FIG. 5).

Specifically, in addition to the second description example, introducing unsymmetricallyAlignedGroupFrom and unsymmetricallyAlignedGroupTo to serviceDescription. unsymmetricallyAlignedGroupFrom can switch without causing asymmetrically extra delay in only one direction relationship with (group) represents the switching source, YuenuesuwaimmetricallyAlignedGroupTo represents its switching destination the relationship (group).

Figure 16 shows the outline of the third description example of USD in FIG. In the third description example, represent the portion indicated by the circle 1, the portion indicated by the circle 2 is a FLUTE stream switching can zapping without causing extra delay to each other. Further, for the zapping FLUTE indicated by the circle 1, asymmetrically in one direction from the viewing stream for the circle 1 ', indicates that the possible switching without causing extra delay. Furthermore, for zapping FLUTE indicated by the circle 2, asymmetrically in one direction from the viewing stream for the circle 2 'represents that which can switch without causing extra delay.

Next, the known portal channel FLUTE multicast distribution to the terminal apparatus 80, a method for combination (e) MBMS of OMA-ESG and USD.

OMA-ESG and the USD is distributed stored in the (e) MBMS of Service Announcement & Metadata91. That, OMA-ESG and USD are together is HTTP unicast distribution in (e) MBMS interaction channel is FLUTE multicast distribution in broadcast multicast channel. However, the delivery of OMA-ESG and USD are may even one FLUTE multicast delivery in HTTP unicast delivery, or broadcast multicast channel on the interaction channel.

Figure 17 is a data model of the OMA-ESG stored in Service Announcement & Metadata91, in the present embodiment, in particular Service111 and Access112 is concerned.

Figure 18 shows a first example of the description of OMA-ESG, drawing A is a description example of a Service, FIG B is an example of description of Access to refer to the Service of the Figure A. The first description example, the corresponding FLUTE stream is applied when it is available to the zapping application.

Specifically, it introduced to define the value "11" which means the Service / ServiceType "ZappingStream" as a flag attribute indicating that the FLUTE stream available for zapping application. If this is described, FLUTE stream described by this Service metadata indicating that available for zapping segment length is sufficiently small.

Figure 19 shows the outline of the first example of the description of OMA-ESG in FIG. From Access, and Service, 3GPP: MBMS: bundleServiceDescrition / userServiceDescription is referred to. Of the referenced Service <ServiceType> 11 </ ServiceType> indicates that the corresponding FLUTE streams available for zapping. The deliveryMethod / @ sessionDescriptionURI of the referenced bundleServiceDescrition / userServiceDescription, get the URL of the SDP is described. The SDP, IP address and port of the corresponding FLUTE stream is described. The mediaPresentationDescription / @ mpdURI of the referenced bundleServiceDescrition / userServiceDescription, get the URL of the MPD is described. The AdaptationSet / Representation of the MPD, the arrangement of each segment in the corresponding FLUTE stream is described.

Figure 20 shows a second example of the description of OMA-ESG. FIG A is a description example of a Service corresponding to zapping FLUTE stream shown by the circle 1, figure B is a description example of the Access referencing the Service of the Figure A. Further, FIG. C is a description example of a Service corresponding to zapping FLUTE stream shown by the circle 2, and FIG. D is a description example of the Access referencing the Service in FIG C.

The second description example, a corresponding FLUTE streams for multiple FLUTE streams zapping applies if a relationship permitting switch without causing extra delay to each other (the relationship shown in FIG. 4) that.

Specifically, in addition to the first described embodiment, the Access, introducing NTPSynchronized and SegmentAlignedGroupID. Access / NTPSynchronized belong to the same group, i.e., SegmentAlignedGroupID operates zapping segmenter 62 of the same respective channel (contents supply apparatus 60) is in the NTP synchronization, i.e., breaks NTP time segment of the FLUTE stream of each channel indicating that they are synchronized to the shaft. Access / SegmentAlignedGroupID represents the ID of the group to segment length of a segment of FLUTE streams are unified.

Figure 21 shows the outline of the second example of the description of OMA-ESG in Figure 20. Access to NTPSynchronized and SegmentAlignedGroupID is introduced is utilized to group the group of describing Service / Access the zapping stream.

If Access / NTPSynchronized (boolean type) is true, indicating that the delimiter of a segment of the corresponding FLUTE stream is NTP synchronization. Further, if the Access / SegmentAlignedGroupID the same, indicating that the segment length of a segment of FLUTE stream coincide. For the second description example, and FLUTE stream shown by the circle 1 and delimiting each segment FLUTE stream indicated by the circle 2 are NTP synchronization, and both belong to the group ID = ID-1 since, indicating that the segment length match.

22 and 23 show a third example of the description of OMA-ESG. A of FIG. 22 is a description example of a Service that corresponds to the FLUTE stream for zapping indicated by the circle 1, B in FIG. 22 is a description example of the Access to refer to Service A in Figure 22. Further, C of FIG. 22 is a description example of a Service that corresponds to the view for FLUTE stream shown by the circle 1 ', D in FIG. 22 is a description example of the Access referencing the Service in C of Figure 22. A of FIG. 23 is a description example of a Service that corresponds to the FLUTE stream for zapping indicated by the circle 2, B in FIG. 23 is a description example of the Access to refer to Service A in Figure 23. Further, C of FIG. 23 is a description example of a Service that corresponds to the view for FLUTE stream shown by the circle 2 ', D in FIG. 23 is a description example of the Access referencing the Service in C of Figure 23.

The third description example, the zapping FLUTE stream each other shown by a circle 1 and circle 2 is a relationship that can switch without causing extra delay to each other (the relationship shown in FIG. 4), further, circles 1 'to the zapping FLUTE stream shown from the viewing for FLUTE stream indicated by a circle 1, also circle 2' to zapping FLUTE stream shown from the viewing for FLUTE stream indicated by a circle 2, asymmetrically in one direction, it is applied when a can switch without causing extra delay relationship (relationship shown in FIG. 5).

Specifically, in addition to the second description example, introducing unsymmetricallyAlignedGroupFrom and unsymmetricallyAlignedGroupTo to Access. unsymmetricallyAlignedGroupFrom can switch without causing asymmetrically extra delay in only one direction relationship with (group) represents the switching source, YuenuesuwaimmetricallyAlignedGroupTo represents its switching destination the relationship (group).

Figure 24 shows the outline of the third example of the description of OMA-ESG in FIGS. 22 and 23. In the third description example, it indicates that circle 1 and circle 2 is a FLUTE stream switching can zapping without causing extra delay to each other. Further, for the zapping FLUTE stream shown by the circle 1, asymmetrically in one direction from the viewing for FLUTE stream shown by the circle 1 ', indicates that the possible switching without causing extra delay. Furthermore, for zapping FLUTE stream shown by the circle 2, asymmetrically in one direction from the viewing for FLUTE stream shown by the circle 2 'represents that which can switch without causing extra delay.

[Operation of content supply system 50]
Operation of content supply system 50 will be described.

Figure 25 is a flowchart illustrating a process of the contents supply apparatus 60 is performed to FLUTE multicast distribution streams of content.

In step S1, the contents supply apparatus 60 in accordance with the system time information provided from the NTP server 52 synchronizes its own system time NTP time axis. Thus, zapping segmenter 62 constituting the contents supply apparatus 60, the viewing for the segmenter 64 and the like becomes possible to operate in synchronization with the NTP time axis.

In step S2, the channel server 61, the zapping streaming data of different bit rates from the source data of content to generate a view for streaming data. Furthermore, channel server 61 outputs the streaming data zapping zapping segmenter 62, and outputs a viewing streaming data to viewing for segmenter 64.

In step S3, zapping segmenter 62 outputs the FLUTE streamer 66 to generate a zapping segment stream such fragmentedMP4 from zapping streaming data. Further, zapping segmenter 62 notifies the like source of URL of the generated zapping segment stream zapping metadata generator 63. In parallel with this, for viewing segmenter 64 outputs the FLUTE streamer 66 to generate a view for segment stream such fragmentedMP4 from viewing streaming data. Further, for viewing segmenter 64 notifies the like generated source URL for viewing a segment stream for viewing metadata generator 65.

In step S4, FLUTE streamer 66 outputs the multicast server 68 generates a FLUTE stream for zapping by storing the zapping segment stream FLUTE packets. Further, FLUTE streamer 66 outputs the multicast server 68 generates a FLUTE stream for viewing by storing the view for segment stream FLUTE packets.

In step S5, zapping metadata generator 63 outputs the FLUTE streamer 66 and the WEB server 67 to generate a zapping metadata. In parallel with this, viewing metadata generator 65 outputs the FLUTE streamer 66 and the WEB server 67 generates a viewing metadata.

In step S6, FLUTE streamer 66 outputs the metadata for viewing and zapping metadata to the multicast server 68. Multicast server 68 FLUTE multicast distribution viewing metadata zapping metadata via the network 51.

In step S7, WEB server 67, when requested (HTTP request) from the terminal device 80, the zapping metadata or viewing metadata in response, HTTP unicast distribution to the requesting via the network 51 .

In step S8, the multicast server 68, a view for FLUTE stream and zapping FLUTE stream and FLUTE multicast distribution through a network 51. In this way, the processing performed by the contents supply apparatus 60 is carried out is terminated.

Then, the terminal device 80 a series of processes of a content providing system 50 to transition to the viewing phase through the zapping phase (hereinafter, referred to as a series process) will be described.

Figure 26 is a flowchart illustrating a processing series of the content supply system 50.

In step S11, the terminal apparatus 80 in accordance with the system time information provided from the NTP server 52 synchronizes its own system time NTP time axis. In step S12, the terminal apparatus 80 receives the zapping metadata being FLUTE multicast distribution as a process of step S6 in FIG. 25. Instead of receiving metadata for zapping being FLUTE multicast distribution, the zapping metadata sends a HTTP request to the WEB server 67 is HTTP unicast delivery, it may be received it. Terminal device 80 that has received the zapping metadata becomes zapping phase.

In step S13, the terminal apparatus 80, based on the zapping metadata, receiving a zapping FLUTE stream being FLUTE multicast distribution as a process of step S8 in FIG. 25, to play.

During this zapping phase, the terminal device 80, as appropriate, by repeating the processing in step S13, it can be switched without causing extra delay between zapping LUTE stream being FLUTE multicast distribution.

The terminal device 80 is such that you obtain the viewing metadata during the zapping phase. Specifically, in step S14, the terminal apparatus 80 receives the viewing metadata being FLUTE multicast distribution as a process of step S6 in FIG. 25. Incidentally, not to be FLUTE multicast delivery to receiving the audience metadata, viewing metadata by sending an HTTP request to the WEB server 67 is HTTP unicast delivery, may be received it .

Terminal device 80 that has received the viewing metadata may transition from zapping phases viewing phase.

In step S15, the terminal apparatus 80, based on the viewing metadata, receiving a zapping FLUTE stream being FLUTE multicast distribution as a process of step S8 in FIG. 25, to play.

Note that, after this, returns to the zapping phase from the viewing phase, i.e., it is also possible to switch to the zapping FLUTE stream from view for FLUTE stream. At this time, if the relationship zapping FLUTE stream after viewing for FLUTE stream and switching before switching is shown in Figure 5, it can be switched without causing extra delay.

This concludes the description of the series process of the content supply system 50. According to a series processes described above, it is possible to perform quickly zapping.

In the above description, the switching of the stream has been assumed to be performed in units of segments, sometimes segments are performed in the sub-segment units are more granular. In that case, the "segment" of the description above is replaced with "sub-segments".

Incidentally, the contents supply apparatus 60 to perform a series of processes described above and the terminal device 80, the other comprising each by hardware or may be realized by a computer executing software. This computer or a computer incorporated in dedicated hardware, by installing various programs, which can execute various functions include, for example, such as a general-purpose personal computer.

Figure 27 is a block diagram showing a configuration example of hardware of a computer as described above.

In the computer 200, CPU (Central Processing Unit) 201, ROM (Read Only Memory) 202, RAM (Random Access Memory) 203 are connected to each other via a bus 204.

The bus 204 is further input and output interface 205 is connected. Output interface 205, an input unit 206, output unit 207, storage unit 208, a communication unit 209, and a drive 210 are connected.

Input unit 206, a keyboard, a mouse, a microphone, and the like. The output unit 207 includes a display and a speaker. Storage unit 208, a hard disk and a nonvolatile memory. The communication unit 209 includes a network interface. Drive 210 drives a magnetic disk, an optical disk, a magneto-optical disk, or a removable medium 211 such as a semiconductor memory.

In configured computer 200 as described above, CPU 201 is, for example, a program stored in the storage unit 208, output interface 205 and the bus 204, and executes the program loaded into RAM 203, the above-described a series of processing is performed.

Program computer 200 (CPU 201) is executed, for example, can be provided by being recorded on the removable medium 211 as a package medium or the like. Further, the program may be provided via a local area network, the Internet, or digital satellite broadcasting, a wired or wireless transmission medium.

In the computer 200, programs, by mounting the removable medium 211 into the drive 210, can be installed via the input and output interface 205, the storage unit 208. The program via a wired or wireless transmission medium and received by the communication unit 209, can be installed in the storage unit 208. Alternatively, the program may be in the ROM202 and the storage unit 208 installed in advance.

The program which the computer 200 executes may be a program processed in time-series is performed in the order described herein, the necessary timing such as when parallel or call is made in the process it may be a program to be performed.

Embodiments of the present disclosure is not intended to be limited to the embodiments described above, but various modifications are possible without departing from the scope of the present disclosure.

The present disclosure can also be configured as follows.
(1)
According adaptive streaming technology, the content supply device for supplying a plurality of streams whose content is the bit rate of the same content different in the same channel,
A first stream generation unit that generates a stream for zapping based on the source data of the content,
A first metadata generating unit for generating a zapping metadata for receiving a stream for the zapping,
A second stream generation unit length of the minimum unit when switching streams than the zapping stream based on the source data of the content to generate long for viewing stream,
A second meta-data generating unit that generates a view for metadata for receiving said viewing a stream,
The zapping metadata, the viewing metadata, content supply device and a multicast distribution unit for multicasting over a network the zapping stream, and the viewing a stream.
(2)
The multicast distribution unit, the zapping metadata, the viewing metadata, content providing device according to (1) to FLUTE multicast distribution through the zapping stream, and the viewing stream for (e) MBMS .
(3)
Metadata and the viewing metadata for the zapping, USD, MPD, and SDP combinations or OMA-ESG, USD, MPD, and the SDP is a combination of (1) or the content supplied according to (2), apparatus.
(4)
It said first stream generator based on the source data of the content, the length of the minimum unit when switching streams to generate a sufficiently short stream,
The first metadata generating unit according to any one of describing information indicating that the stream corresponding to the zapping metadata available for zapping application metadata for the zapping from (1) (3) content supply device.
(5)
Said first stream generator based on the source data of the content, delimiting a minimum unit when switching streams has NTP synchronization, the length of the minimum unit is unified with the other channels to generate a zapping stream,
The first metadata generating unit, information indicating that the information stream corresponding to said zapping metadata indicating that available stream Applications for the zapping, the minimum unit of the separator are NTP synchronized or said, content providing apparatus according to any one of at least one said write to said zapping metadata of the information indicating that the length of the smallest unit is unified with the other channel (1) (3) .
(6)
Said second stream generator divides the minimum unit when switching streams has NTP synchronization, the length of the minimum unit, of the zapping stream generated by the first stream generator It generates an integer multiple of the view for the stream of the minimum unit,
The first metadata generation unit is further from said viewing a stream generated by the second stream generator against zapping stream corresponding to the zapping metadata, only asymmetrically in one direction information indicating that it is possible to switch that does not result in excessive delays described the zapping metadata,
The second metadata generation unit, to the zapping stream generated by the first stream generator from view for the stream corresponding to the viewing metadata, one direction asymmetrically extra only contents supply apparatus according to the describing information indicating that it is possible to switch that does not cause a delay in the metadata for the viewing (5).
(7)
Content providing apparatus according to any one of the zapping metadata, and the viewing metadata from said further comprising a unicast delivery unit for unicast distribution via the network (1) (6).

50 content providing system, 51 Network, 52 NTP server, 60 content supplying device, 61 channel server, 62 zapping segmenter, 63 zapping metadata generator 64 for viewing segmenter, 65 viewing metadata generator 66 FLUTE streamer, 67 WEB server, 68 multicast server 80 the terminal apparatus, 100 computer, 101 CPU

Claims (11)

  1. According adaptive streaming technology, the content supply device for supplying a plurality of streams whose content is the bit rate of the same content different in the same channel,
    A first stream generation unit that generates a stream for zapping based on the source data of the content,
    A first metadata generating unit for generating a zapping metadata for receiving a stream for the zapping,
    A second stream generation unit length of the minimum unit when switching streams than the zapping stream based on the source data of the content to generate long for viewing stream,
    A second meta-data generating unit that generates a view for metadata for receiving said viewing a stream,
    The zapping metadata, the viewing metadata, content supply device and a multicast distribution unit for multicasting over a network the zapping stream, and the viewing a stream.
  2. The multicast distribution unit, the zapping metadata, the viewing metadata, the zapping stream, and the content supplying device according to claim 1, FLUTE multicast delivery to via (e) MBMS said viewing a stream.
  3. Metadata and the viewing metadata for the zapping, USD, MPD, and SDP combinations or OMA-ESG, USD, MPD, and the content supplying device according to claim 2 SDP is a combination of,.
  4. It said first stream generator based on the source data of the content, the length of the minimum unit when switching streams to generate a sufficiently short stream,
    The first metadata generating unit, the contents supply apparatus according to claim 2 describes information indicating that the stream corresponding to the zapping metadata available for zapping application metadata for the zapping.
  5. Said first stream generator based on the source data of the content, delimiting a minimum unit when switching streams has NTP synchronization, the length of the minimum unit is unified with the other channels to generate a zapping stream,
    The first metadata generating unit, information indicating that the information stream corresponding to said zapping metadata indicating that available stream Applications for the zapping, the minimum unit of the separator are NTP synchronized or said, contents supply apparatus according to claim 2 which describes at least one metadata for the zapping of the information indicating that the length of the smallest unit is unified with the other channels.
  6. Said second stream generator divides the minimum unit when switching streams has NTP synchronization, the length of the minimum unit, of the zapping stream generated by the first stream generator It generates an integer multiple of the view for the stream of the minimum unit,
    The first metadata generation unit is further from said viewing a stream generated by the second stream generator against zapping stream corresponding to the zapping metadata, only asymmetrically in one direction information indicating that it is possible to switch that does not result in excessive delays described the zapping metadata,
    The second metadata generation unit, to the zapping stream generated by the first stream generator from view for the stream corresponding to the viewing metadata, one direction asymmetrically extra only contents supply apparatus according to describe claim 5 information indicating that it is possible to switch that does not cause a delay in the metadata for the viewing.
  7. The zapping metadata, and content providing apparatus according to claim 2, further comprising a unicast delivery unit the viewing metadata to unicast distribution over the network.
  8. According adaptive streaming technology, the content providing method of the content supply device for supplying contents to the same plurality of streams comprising the bit rates are different in content on the same channel,
    By the contents supply apparatus,
    To generate a stream for zapping based on the source data of the content, the stream length of the minimum unit when switching streams than the zapping stream based on the source data of the content to generate a long view for stream a generation step,
    To generate a zapping metadata for receiving a stream for the zapping, a metadata generating step of generating a view for metadata for receiving said viewing a stream,
    The zapping metadata, the viewing metadata, the zapping stream, and the content supply method comprising the multicast distribution step the viewing stream for multicasting over a network.
  9. According adaptive streaming technology, the computer supplies a plurality of streams whose content is the bit rate of the same content different in the same channel,
    A first stream generation unit that generates a stream for zapping based on the source data of the content,
    A first metadata generating unit for generating a zapping metadata for receiving a stream for the zapping,
    A second stream generation unit length of the minimum unit when switching streams than the zapping stream based on the source data of the content to generate long for viewing stream,
    A second meta-data generating unit that generates a view for metadata for receiving said viewing a stream,
    The zapping metadata, the viewing metadata, the zapping stream, and a program to function as the multicast distribution unit the viewing stream for multicasting over a network.
  10. According adaptive streaming technology, a terminal device that receives the stream contents supplied from the content supply device for supplying a plurality of identical streams comprising the bit rates are different in content on the same channel,
    The contents supply apparatus,
    A first stream generation unit that generates a stream for zapping based on the source data of the content,
    A first metadata generating unit for generating a zapping metadata for receiving a stream for the zapping,
    A second stream generation unit length of the minimum unit when switching streams than the zapping stream based on the source data of the content to generate long for viewing stream,
    A second meta-data generating unit that generates a view for metadata for receiving said viewing a stream,
    With the zapping metadata, the viewing metadata, the zapping stream, and a multicast distribution unit for multicasting over a network the viewing stream for,
    Retrieve metadata for the zapping, receiving a stream for the zapping based on the acquired zapping metadata, reproduces, said acquired viewing metadata, obtained on the basis of the viewing metadata receiving the audience for the stream, a terminal device reproducing.
  11. According adaptive streaming technology, content and content supply device for supplying a plurality of streams comprising the bit rates are different the same content on the same channel, in the content providing system comprising a terminal device that receives the stream,
    The contents supply apparatus,
    A first stream generation unit that generates a stream for zapping based on the source data of the content,
    A first metadata generating unit for generating a zapping metadata for receiving a stream for the zapping,
    A second stream generation unit length of the minimum unit when switching streams than the zapping stream based on the source data of the content to generate long for viewing stream,
    A second meta-data generating unit that generates a view for metadata for receiving said viewing a stream,
    With the zapping metadata, the viewing metadata, the zapping stream, and a multicast distribution unit for multicasting over a network the viewing stream for,
    The terminal device,
    Retrieve metadata for the zapping, receiving a stream for the zapping based on the acquired zapping metadata, reproduces, said acquired viewing metadata, obtained on the basis of the viewing metadata receiving the audience for streams, the content supply system for reproducing.
PCT/JP2014/068678 2013-07-26 2014-07-14 Content supply device, content supply method, program, terminal device, and content supply system WO2015012140A1 (en)

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Citations (2)

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Publication number Priority date Publication date Assignee Title
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WO2012138909A1 (en) * 2011-04-05 2012-10-11 Qualcomm Incorporated Ip broadcast streaming services distribution using file delivery methods

Patent Citations (2)

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Publication number Priority date Publication date Assignee Title
JP2009284283A (en) * 2008-05-23 2009-12-03 Sony Corp Content server, information processing apparatus, network device, content distribution method, information processing method, and content distribution system
WO2012138909A1 (en) * 2011-04-05 2012-10-11 Qualcomm Incorporated Ip broadcast streaming services distribution using file delivery methods

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