File generation apparatus and file generation method as well as reproduction apparatus and reproduction method
There is provided a file generation apparatus and a file generation method as well as a reproduction apparatus and a reproduction method by which a file for efficiently storing quality information of a depth-related image at least including a depth image can be generated. A segment file generation unit generates a file in which quality information representative of quality of a depth-related image including at least a depth image is disposed in a form divided for each kind. The present disclosure can be applied to a file generation apparatus of an information processing system or the like by which a segment file and an MPD file of a video content are distributed, for example, in a method that complies with MPEG-DASH.
1. A file generation apparatus comprising:
a file generation unit configured to generate a depth file storing
a plurality of encoded streams of depth images in a plurality of tracks, the plurality of encoded streams of the depth images including at least a first encoded stream of a first depth image in a first track and a second encoded stream of a second depth image in a second track, and
a third encoded stream of quality information of each depth image in a third track,
wherein the file generation unit is further configured to
generate identification information related to the quality information included in the third encoded stream,
generate information indicating a correspondence relationship between the identification information and the depth images in the plurality of tracks, and
store the information indicating the correspondence relationship in a metadata area of the depth file,
wherein the third encoded stream comprises a plurality of samples including the quality information, each sample being divided into a plurality of subsamples,
wherein the information indicating the correspondence relationship indicates a respective track of the plurality of tracks corresponding to each respective subsample of the plurality of subsamples based on the identification information,
and
wherein the file generation unit is implemented via at least one processor.
2. The file generation apparatus according to claim 1 ,
wherein each respective track of the plurality of tracks is identified by a respective track ID.
3. The file generation apparatus according to claim 2 ,
wherein the information indicating the correspondence relationship refers to the respective track ID of the respective track corresponding to each respective subsample.
4. The file generation apparatus according to claim 3 ,
wherein the information indicating the correspondence relationship comprises syntax of reference_track_id_num corresponding to the respective track ID of each respective track.
5. The file generation apparatus according to claim 4 ,
wherein the reference_track_id_num corresponding to the respective track ID of each respective track is stored in a moov box of the depth file.
6. A file generation method comprising:
generating a depth file storing
a plurality of encoded streams of depth images in a plurality of tracks, the plurality of encoded streams of the depth images including at least a first encoded stream of a first depth image in a first track and a second encoded stream of a second depth image in a second track, and
a third encoded stream of quality information of each depth image in a third track;
generating identification information related to the quality information included in the third encoded stream;
generating information indicating a correspondence relationship between the identification information and the depth images in the plurality of tracks; and
storing the information indicating the correspondence relationship in a metadata area of the depth file,
wherein the third encoded stream comprises a plurality of samples including the quality information, each sample being divided into a plurality of subsamples, and
wherein the information indicating the correspondence relationship indicates a respective track of the plurality of tracks corresponding to each respective subsample of the plurality of subsamples based on the identification information.