Information processing apparatus and method, program, and content supply system

1. An information processing apparatus, comprising:

reception circuitry configured to receive control information related to unicast distribution of a content, the control information including a Media Presentation Description (MPD); and

processing circuitry configured to

evaluate a cost when multicast distribution or broadcast distribution is to be used for a supply of the content in accordance with the control information received by the reception circuitry;

determine whether or not to use the multicast distribution or the broadcast distribution for the supply of the content in accordance with the evaluation result;

update, when the multicast distribution or the broadcast distribution is determined to be used for the supply of the content, the control information received by the reception circuitry so as to use the multicast distribution or the broadcast distribution for the supply of the content; and

store an identifier which identifies the multicast distribution or the broadcast distribution to be used for the supply of the content according to a service location attribute in a Base URL of the MPD.

2. The information processing apparatus according to claim 1 , wherein the processing circuitry is configured to evaluate the cost in accordance with an amount of the control information received by the reception circuitry.

3. The information processing apparatus according to claim 1 , wherein the reception circuitry is configured to receive the control information supplied from a client connected to a network.

4. The information processing apparatus according to claim 1 , wherein the reception circuitry is configured to receive the control information, supplied from a proxy server of a server supplying the content, which has been collected from a client by the proxy server.

5. The information processing apparatus according to claim 1 , wherein the processing circuitry is configured to

confirm a usable condition of a resource of the multicast distribution or the broadcast distribution, and

evaluate the cost when the confirmed usable resource is to be used.

6. The information processing apparatus according to claim 1 , wherein the processing circuitry is configured to

secure, when the multicast distribution or the broadcast distribution is determined to be used, a resource of the multicast distribution or the broadcast distribution for supplying the content, and

update the control information so as to use the secured resource for the supply of the content.

7. The information processing apparatus according to claim 1 ,

wherein the content is a stream of a Dynamic Adaptive Streaming over HTTP (DASH) format.

8. The information processing apparatus according to claim 1 , wherein

the service location attribute is a serviceLocationAttribute URL attribute, and

the processing circuitry is configured to store the identifier which identifies the multicast distribution or the broadcast distribution to be used for the supply of the content in a DeliverySystemIdentifier of a Service Location file designated by the serviceLocationAttribute URL attribute arranged in the Base URL of the MPD.

9. The information processing apparatus according to claim 8 , wherein the processing circuitry is configured to store a parameter for acquiring stream data in a system corresponding to an identifier stored in the DeliverySystemIdentifier in a DeliverySystemDescriptor of the Service Location file designated by the serviceLocationAttribute URL attribute arranged in the Base URL of the MPD.

10. The information processing apparatus according to claim 1 , wherein the processing circuitry is configured to

unicast distribute a stream for a unicast of the content.

11. The information processing apparatus according to claim 10 , wherein the processing circuitry is configured to

convert the stream for the unicast of the content into a stream for the multicast distribution or the broadcast distribution; and

multicast distribute or broadcast distribute the converted stream.

12. The information processing apparatus according to claim 11 ,

wherein the stream for the unicast is a stream of a Dynamic Adaptive Streaming over HTTP (DASH) format, and

wherein the converted stream for the multicast distribution or the broadcast distribution is a file of a File Delivery over Unidirectional Transport (FLUTE) protocol.

13. The information processing apparatus according to claim 12 , wherein the processing circuitry is configured to introduce a range attribute as an attribute of a File element in a File Delivery Table (FDT)-Instance of the file of the FLUTE protocol.

14. The information processing apparatus according to claim 1 , wherein the processing circuitry is configured to

supply the updated control information.

15. The information processing apparatus according to claim 14 , wherein the processing circuitry is configured to

acquire the content instead of a client, and

supply the acquired content to the client by the unicast distribution, or supply the acquired content to the client by using a resource of the multicast distribution or the broadcast distribution, in accordance with the supplied control information.

16. An information processing method comprising:

receiving, by reception circuitry, control information related to unicast distribution of a content, the control information including a Media Presentation Description (MPD);

evaluating, by processing circuitry, a cost when multicast distribution or broadcast distribution is to be used for a supply of the content in accordance with the received control information;

determining whether or not to use the multicast distribution or the broadcast distribution for the supply of the content in accordance with the evaluation result;

updating, when the multicast distribution or the broadcast distribution is determined to be used, the received control information so as to use the multicast distribution or the broadcast distribution for the supply of the content, and

storing an identifier which identifies the multicast distribution or the broadcast distribution to be used for the supply of the content according to a service location attribute in a Base URL of the MPD.

17. A non-transitory computer readable medium including a computer executable program which when executed by a computer causes the computer to perform an information processing method, the information processing method comprising:

receiving control information related to unicast distribution of a content, the control information including a Media Presentation Description (MPD);

evaluating a cost when multicast distribution or broadcast distribution is to be used for a supply of the content in accordance with the received control information;

determine whether or not to use the multicast distribution or the broadcast distribution for the supply of the content in accordance with the evaluation result;

updating, when the multicast distribution or the broadcast distribution is determined to be used, the received control information so as to use the multicast distribution or the broadcast distribution for the supply of the content, and

storing an identifier which identifies the multicast distribution or the broadcast distribution to be used for the supply of the content according to a service location attribute in a Base URL of the MPD.

18. A client apparatus comprising:

processing circuitry configured to

receive a content via a multicast distribution or a broadcast distribution, wherein

when the multicast distribution or the broadcast distribution has been determined to be used for supply of the content according to a Media Presentation Description (MPD), a used multicast distribution or the broadcast distribution is identified according to a service location attribute in a Base URL of the MPD.

19. The client apparatus according to claim 18 ,

wherein the content is a stream of a Dynamic Adaptive Streaming over HTTP (DASH) format.

20. The client apparatus according to claim 18 , wherein the service location attribute is a URL attribute associated with a service location.

21. The client apparatus according to claim 18 ,

wherein the content includes a multicast or broadcast stream, which includes a file of a File Delivery over Unidirectional Transport (FLUTE) protocol.

22. The client apparatus according to claim 18 , wherein the processing circuitry is configured to

receive updated control information.

23. The information processing apparatus according to claim 22 , wherein the processing circuitry is configured to

receive a content by a unicast distribution or a multicast distribution or a broadcast distribution, in accordance with the updated control information.

24. A client processing method comprising:

receiving, by processing circuitry, a content via a multicast distribution or a broadcast distribution, wherein

when the multicast distribution or the broadcast distribution has been determined to be used for supply of the content according to a Media Presentation Description (MPD), a used multicast distribution or the broadcast distribution is identified according to a service location attribute in a Base URL of the MPD.