Information processing apparatus and method
The present disclosure relates to an information processing apparatus and method capable of suppressing an increase in a load of a reproduction process. A scene description file that describes a scene of 3D object content is generated, the scene description file including information associated with Media Presentation Description (MPD) that stores metadata of the 3D object content distributed by using Moving Picture Experts Group Dynamic Adaptive Streaming over HTTP (MPEG DASH) and information regarding encoding of Representation included in Adaptation Set in the MPD. Furthermore, the scene description file is analyzed, the 3D object content to be decoded is selected on the basis of the information regarding the encoding of the Representation, and the encoded data of the selected 3D content is decoded. The present disclosure can be applied to, for example, an information processing apparatus, an information processing method, or the like.
1. An information processing apparatus comprising:
processing circuitry configured to generate a scene description file that describes a scene of 3D object content, wherein
the scene description file includes information associated with a media presentation description (MPD) that stores metadata of the 3D object content distributed by using Moving Picture Experts Group Dynamic Adaptive Streaming over HTTP (MPEG DASH),
the scene description file includes codec information for each of a plurality of Representations, each of the Representations being included in an Adaptation Set in the MPD, and
the codec information for each of the Representations, that is included in the scene description file, provides for comparison of the codec information with capability information such that selection of the 3D object content distributed by using the MPEG DASH can be performed without acquiring and analyzing the MPD.
2. The information processing apparatus according to claim 1 , wherein the scene description file stores the codec information in a tracks array of an alternatives array of an MPEG media extension.
3. The information processing apparatus according to claim 1 , wherein the codec information includes information regarding an encoding method, a profile, and a level applied to encoding of the Representations.
4. The information processing apparatus according to claim 3 , wherein
the codec information includes
information regarding the encoding method, the profile, and the level of the Representation of which encoding quality is highest, or
information regarding the encoding method, the profile, and the level of the Representation of which the encoding quality is lowest
among all of the Representations included in the Adaptation Set.
5. The information processing apparatus according to claim 3 , wherein
the codec information regarding the encoding includes
information regarding the encoding method, the profile, and the level of the Representation of which encoding quality is highest, and
information regarding the encoding method, the profile, and the level of the Representation of which the encoding quality is lowest
among all of the Representations included in the Adaptation Set.
6. The information processing apparatus according to claim 3 , wherein
the codec information includes information regarding the encoding method, the profile, and the level of all of the Representations included in the Adaptation Set.
7. The information processing apparatus according to claim 2 , wherein the scene description file further stores information regarding a profile of the MPEG DASH.
8. The information processing apparatus according to claim 7 , wherein the scene description file stores the information regarding the profile of the MPEG DASH in a mimetype of the alternatives array of the MPEG_media extension.
9. The information processing apparatus according to claim 7 , wherein the scene description file stores the information regarding the profile of the MPEG DASH in a mimetype of a profile_alternatives array of the MPEG media extension.
10. An information processing method comprising:
generating a scene description file that describes a scene of 3D object content, wherein
the scene description file includes information associated with a media presentation description (MPD) that stores metadata of the 3D object content distributed by using Moving Picture Experts Group Dynamic Adaptive Streaming over HTTP (MPEG DASH), and
the scene description file includes codec information for each of a plurality of Representations, each of the Representations being included in an Adaptation Set in the MPD, and
the codec information for each of the Representations, that is included in the scene description file, provides for comparison of the codec information with capability information such that selection of the 3D object content distributed by using the MPEG DASH can be performed without acquiring and analyzing the MPD.
11. An information processing apparatus comprising:
processing circuitry configured to:
analyze a scene description file that describes a scene of 3D object content,
the scene description file including information associated with a media presentation description (MPD) that stores metadata of the 3D object content distributed by using Moving Picture Experts Group Dynamic Adaptive Streaming over HTTP (MPEG DASH), and
the scene description file including codec information for each of a plurality of Representations, each of the Representations being included in an Adaptation Set in the MPD;
compare the codec information from the scene description file with capability information of the information processing apparatus;
select the 3D object content distributed by using the MPEG DASH to be decoded on a basis of the comparison without acquiring the MPD; and
decode encoded data of the selected 3D object content.
12. The information processing apparatus according to claim 11 , wherein the codec information is stored in a tracks array of an alternatives array of an MPEG media extension of the scene description file.
13. The information processing apparatus according to claim 11 , wherein
the codec information includes information regarding an encoding method, a profile, and a level applied to the encoding of Representations, and
the processing circuitry is configured to select the 3D object content to be decoded on a basis of the information regarding the encoding method, the profile, and the level.
14. The information processing apparatus according to claim 13 , wherein
the codec information regarding the encoding includes
information regarding the encoding method, the profile, and the level of the Representation of which encoding quality is highest, or
information regarding the encoding method, the profile, and the level of the Representation of which the encoding quality is lowest
among all of the Representations included in the Adaptation Set, and
the processing circuitry is configured to select the 3D object content to be decoded on the basis of
the information regarding the encoding method, the profile, and the level of the Representation of which the encoding quality is highest, or
the information regarding the encoding method, the profile, and the level of the Representation of which the encoding quality is lowest.
15. The information processing apparatus according to claim 13 , wherein
the codec information regarding the encoding includes
information regarding the encoding method, the profile, and the level of the Representation of which encoding quality is highest, and
information regarding the encoding method, the profile, and the level of the Representation of which the encoding quality is lowest
among all of the Representations included in the Adaptation Set, and
the processing circuitry is configured to select the 3D object content to be decoded on the basis of
the information regarding the encoding method, the profile, and the level of the Representation of which the encoding quality is highest, and
the information regarding the encoding method, the profile, and the level of the Representation of which the encoding quality is lowest.
16. The information processing apparatus according to claim 13 , wherein
the codec information regarding the encoding includes information regarding the encoding method, the profile, and the level of all of the Representations included in the Adaptation Set, and
the processing circuitry is configured to select the 3D object content to be decoded on the basis of the information regarding the encoding method, the profile, and the level of all of the Representations included in the Adaptation Set.
17. The information processing apparatus according to claim 12 , wherein the processing circuitry is configured to select the 3D object content to be decoded further on the basis of information regarding a profile of the MPEG DASH stored in the scene description file.
18. The information processing apparatus according to claim 17 , wherein the processing circuitry is configured to select the 3D object content to be decoded on the basis of the information regarding the profile of the MPEG DASH stored in a mimetype of the alternatives array of the MPEG_media extension of the scene description file.
19. The information processing apparatus according to claim 17 , wherein the processing circuitry is configured to select the 3D object content to be decoded on the basis of the information regarding the profile of the MPEG DASH stored in a mimetype of a profile_alternatives array of the MPEG_media extension of the scene description file.
20. An information processing method comprising:
analyzing a scene description file that describes a scene of 3D object content,
the scene description file including information associated with a media presentation description (MPD) that stores metadata of the 3D object content distributed by using Moving Picture Experts Group Dynamic Adaptive Streaming over HTTP (MPEG DASH), and
the scene description file including codec information for each of a plurality of Representations, each of the Representations being included in an Adaptation Set in the MPD;
comparing the codec information from the scene description file with capability information of the information processing apparatus;
selecting the 3D object content distributed by using the MPEG DASH to be decoded on a basis of the comparison without acquiring the MPD; and
decoding encoded data of the selected 3D object content.