Transmission apparatus, transmitting method, reception apparatus, and receiving method
View Patent ↗The present technique relates to a transmission apparatus, a transmitting method, a reception apparatus, and a receiving method for promptly distributing data. An http response having a part of a fragment and a hypertext transfer protocol (http) header is distributed. The http header includes a sequence number representing an order of the fragment and a version representing an order of a part of the fragment in the fragment. The present technique is applied to, for example, a case where content is distributed by multicast and the like.
1. A transmission apparatus transmitting a stream of content via multicast or broadcast, the stream being segmented into segments, a segment of the segments comprising a plurality of fragments, the transmission apparatus comprising:
a transmitter configured to transmit a hypertext transfer protocol (http) response including a part of a fragment of the plurality of fragments and a http header, wherein
the http header includes
a sequence number representing an order of the fragment with respect to other fragments of the plurality of fragments, and
a version representing an order of the part of the fragment with respect to other parts in the fragment.
2. The transmission apparatus according to claim 1 , wherein the version of the http header of the http response includes information indicating a last part of the fragment.
3. The transmission apparatus according to claim 1 ,
wherein the http response is a first http response, the http header is a first http header, the part of a fragment is a first part,
wherein the transmitter is configured to transmit a second http response including a second part of the fragment and a second http header, and
wherein the second http header includes a version representing an order of the second part of the fragment with respect to other parts in the fragment.
4. The transmission apparatus according to claim 2 , wherein
the fragment includes a movie fragment (moof) and a movie data (mdat),
the moof includes a BaseMediaDecodeTime representing a presentation time of a first sample of the mdat, and
the http header further includes a network time protocol (NTP) time corresponding to the BaseMediaDecodeTime.
5. The transmission apparatus according to claim 4 , wherein the http header further includes sample count start information indicating an order of the first sample which is a part of the fragment included in the http response from the first sample of the fragment.
6. The transmission apparatus according to claim 5 , wherein the http header of the http response including a part of the second or later of the fragment includes the sample count start information.
7. The transmission apparatus according to claim 6 , wherein the fragment is a fragment of fragmented MP4.
8. A transmitting method for transmitting a stream of content via multicast or broadcast, the stream being segmented into segments, a segment of the segments comprising a plurality of fragments, the transmitting method comprising:
transmitting, by a transmitter, a hypertext transfer protocol (http) response including a part of a fragment of the plurality of fragments and a http header, wherein
the http header includes
a sequence number representing an order of the fragment with respect to other fragments of the plurality of fragments, and
a version representing an order of the part of the fragment with respect to other parts in the fragment.
9. A reception apparatus receiving a stream of content via multicast or broadcast, the stream being segmented into segments, a segment of the segments comprising a plurality of fragments, the reception apparatus comprising:
a receiver configured to receive a hypertext transfer protocol (http) response including a part of a fragment of the plurality of fragments and a http header, wherein
the http header includes
a sequence number representing an order of the fragment with respect to other fragments of the plurality of fragments, and
a version representing an order of the part of the fragment with respect to other parts in the fragment.
10. The reception apparatus according to claim 9 , wherein the version of the http header of the http includes information indicating a last part of the fragment.
11. The reception apparatus according to claim 10 , wherein
the fragment includes a movie fragment (moof) and a movie data (mdat),
the moof includes a BaseMediaDecodeTime representing a presentation time of a first sample of the mdat, and
the http header further includes a network time protocol (NTP) time corresponding to the BaseMediaDecodeTime.
12. The reception apparatus according to claim 11 , wherein the http header further includes sample count start information indicating an order of the first sample which is a part of the fragment included in the http response from the first sample of the fragment.
13. The reception apparatus according to claim 12 , wherein the http header of the http response including a part of the second or later of the fragment includes the sample count start information.
14. The reception apparatus according to claim 13 , wherein the fragment is a fragment of fragmented MP4.
15. A receiving method for receiving a stream of content via multicast or broadcast, the stream being segmented into segments, a segment of the segments comprising a plurality of fragments, the receiving method comprising:
receiving, by a receiver, a hypertext transfer protocol (http) response including a part of a fragment of the plurality of fragments and a http header, wherein
the http header includes
a sequence number representing an order of the fragment with respect to other fragments of the plurality of fragments, and
a version representing an order of the part of the fragment with respect to other parts in the fragment.
16. The receiving method according to claim 15 , wherein the http header further includes sample count start information indicating an order of the first sample which is a part of the fragment included in the http response from the first sample of the fragment.
17. The receiving method according to claim 16 , wherein the http header of the http response including a part of the second or later of the fragment includes the sample count start information.
18. The receiving method according to claim 17 , wherein the fragment is a fragment of fragmented MP4.
19. A non-transitory computer readable medium storing computer executable instructions which, when executed by a computer that transmits a stream of content via multicast or broadcast, the stream being segmented into segments, a segment of the segments comprising a plurality of fragments, cause the computer to:
transmit a hypertext transfer protocol (http) response including a part of a fragment of the plurality of fragments and a http header, wherein
the http header includes
a sequence number representing an order of the fragment with respect to other fragments of the plurality of fragments, and
a version representing an order of the part of the fragment with respect to other parts in the fragment.