Transmission device, transmission method, reception device and reception method
Convenience is achieved in performing processing depending on decoding capability in a reception side. High-frame-rate ultra-high-definition image data is processed to obtain first image data for acquisition of a base-frame-rate high-definition image, second image data for acquisition of a high-frame-rate high-definition image by being used with the first image data, third image data for acquisition of a base-frame-rate ultra-high-definition image by being used with the first image data, and fourth image data for acquisition of a high-frame-rate ultra-high definition image by being used with the first to third image data. A container is transmitted including a predetermined number of video streams including encoded image data of the first to fourth image data. Information is inserted into the container, the information corresponding to information that is inserted into each of the predetermined number of video streams and associated with image data included in the video streams.
1. A transmission device, comprising:
circuitry configured to
process high-frame-rate ultra-high-definition image data to obtain first image data for acquisition of a base-frame-rate high-definition image, second image data for acquisition of a high-frame-rate high-definition image by being used with the first image data, third image data for acquisition of a base-frame-rate ultra-high-definition image by being used with the first image data, and fourth image data for acquisition of a high-frame-rate ultra-high-definition image by being used with the first to third image data;
transmit a container including (i) a base stream that includes encoded image data of the first image data and encoded image data of the second image data, and (ii) an enhancement stream that includes encoded image data of the third image data and encoded image data of the fourth image data; and
insert, into the container, information in which the base and enhancement streams are each managed with one track, wherein the information includes a first representation corresponding to the base stream and a second representation corresponding to the enhancement stream.
2. The transmission device according to claim 1 , wherein the information is a Media Presentation Description (MPD).
3. The transmission device according to claim 1 , wherein the circuitry is configured to, when inserting the information into the container,
insert the information for the base stream by grouping information associated with the encoded image data of the first image data and information associated with the encoded image data of the second image data, and
insert the information for the enhancement stream by grouping information associated with the encoded image data of the third image data and information associated with the encoded image data of the fourth image data.
4. The transmission device according to claim 1 , wherein
a picture of the first image data and a picture of the second image data are encoded alternately in the base stream, and
a picture of the third image data and a picture of the fourth image data are encoded alternately in the enhancement stream.
5. The transmission device according to claim 1 , wherein
the high-frame-rate ultra-high-definition image data is high-dynamic-range transmission image data obtained by performing high-dynamic-range photoelectric conversion on high-dynamic-range image data, and
the circuitry is configured to further insert conversion characteristic information indicating a characteristic of the high-dynamic-range photoelectric conversion or an electro-optical conversion corresponding to the high-dynamic-range photoelectric conversion into the information.
6. The transmission device according to claim 5 , wherein the conversion characteristic information indicates a characteristic of Hybrid Log-Gamma.
7. The transmission device according to claim 5 , wherein the conversion characteristic information indicates a characteristic of a PQ curve.
8. A reception device, comprising:
circuitry configured to receive a container including (i) a base stream including encoded image data of first image data and encoded image data of second image data, and (ii) an enhancement stream including encoded image data of third image data and encoded image data of fourth image data, wherein
the first image data is for acquisition of a base-frame-rate high-definition image, the second image data is for acquisition of a high-frame-rate high-definition image by being used with the first image data, the third image data is for acquisition of a base-frame-rate ultra-high-definition image by being used with the first image data, and the fourth image data is for acquisition of a high-frame-rate ultra-high-definition image by being used with the first to third image data,
the container includes information in which the base and enhancement streams are each managed with one track, and
the information includes a first representation corresponding to the base stream and a second representation corresponding to the enhancement stream; and
the circuitry is configured to obtain image data for display by decoding encoded image data included in the base and enhancement streams based on the information included in the container.
9. The reception device according to claim 8 , wherein the information is a Media Presentation Description (MPD).
10. The reception device according to claim 8 , wherein
the information for the base stream is included in the container by grouping information associated with the encoded image data of the first image data and information associated with the encoded image data of the second image data, and
the information for the enhancement stream is included in the container by grouping information associated with the encoded image data of the third image data and information associated with the encoded image data of the fourth image data.
11. The reception device according to claim 8 , wherein
the information included in the container further includes conversion characteristic information indicating a characteristic of a high-dynamic-range photoelectric conversion or an electro-optical conversion corresponding to the high-dynamic-range photoelectric conversion, and
the circuitry is configured to perform electro-optical conversion on the image data obtained by the decoding processing based on the conversion characteristic information.
12. The reception device according to claim 11 , wherein the conversion characteristic information indicates a characteristic of Hybrid Log-Gamma.
13. The reception device according to claim 11 , wherein the conversion characteristic information indicates a characteristic of a PQ curve.
14. A reception method, comprising
receiving, by circuitry, a container including (i) a base stream including encoded image data of first image data and encoded image data of second image data, and (ii) an enhancement stream including encoded image data of third image data and encoded image data of fourth image data, wherein
the first image data is for acquisition of a base-frame-rate high-definition image, the second image data is for acquisition of a high-frame-rate high-definition image by being used with the first image data, the third image data is for acquisition of a base-frame-rate ultra-high-definition image by being used with the first image data, and the fourth image data is for acquisition of a high-frame-rate ultra-high-definition image by being used with the first to third image data,
the container includes information in which the base and enhancement streams are each managed with one track,
the information includes a first representation corresponding to the base stream and a second representation corresponding to the enhancement stream, and
the reception method further comprises obtaining, by the circuitry, image data for display by decoding encoded image data included in the base and enhancement streams based on the information included in the container.
15. The reception method according to claim 14 , wherein the information is a Media Presentation Description (MPD).
16. The reception method according to claim 14 , wherein
the information for the base stream is included in the container by grouping information associated with the encoded image data of the first image data and information associated with the encoded image data of the second image data, and
the information for the enhancement stream is included in the container by grouping information associated with the encoded image data of the third image data and information associated with the encoded image data of the fourth image data.
17. The reception method according to claim 14 , wherein
the information included in the container further includes conversion characteristic information indicating a characteristic of a high-dynamic-range photoelectric conversion or an electro-optical conversion corresponding to the high-dynamic-range photoelectric conversion, and
the reception method further comprises performing electro-optical conversion on the image data obtained by the decoding processing based on the conversion characteristic information.
18. The reception method according to claim 17 , wherein the conversion characteristic information indicates a characteristic of Hybrid Log-Gamma.
19. The reception method according to claim 17 , wherein the conversion characteristic information indicates a characteristic of a PQ curve.