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 a predetermined number of video streams including encoded image data of the first to fourth image data, the container including a first video stream that includes the encoded image data of the first image data and the encoded image data of the second image data, and a second video stream that includes the encoded image data of the third image data and the encoded image data of the fourth image data; and
insert information into the container in a state in which the first and second video streams are each managed with two tracks, 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.
2. The transmission device according to claim 1 , wherein the circuitry is configured to, when inserting the information into the container,
perform insertion 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, for the first video stream, and
perform insertion 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, for the second video stream.
3. 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 first video stream, and
a picture of the third image data and a picture of the fourth image data are encoded alternately in the second video stream.
4. The transmission device according to claim 1 , wherein
the high-frame-rate ultra-high-definition image data is transmission image data having a high-dynamic-range photoelectric conversion characteristic given by performing photoelectric conversion by the high-dynamic-range photoelectric conversion characteristic on high-dynamic-range image data, and
the circuitry is configured to further insert conversion characteristic information indicating the high-dynamic-range photoelectric conversion characteristic or an electro-optical conversion characteristic corresponding to the high-dynamic-range photoelectric conversion characteristic, into the first video stream including the encoded image data of the first image data.
5. The transmission device according to claim 4 , wherein the high-dynamic-range photoelectric conversion characteristic is a characteristic of Hybrid Log-Gamma.
6. The transmission device according to claim 4 , wherein the high-dynamic-range photoelectric conversion characteristic is a characteristic of a PQ curve.
7. The transmission device according to claim 6 , wherein the circuitry is configured to further insert conversion information for conversion of a value of conversion data by the characteristic of the PQ curve to a value of conversion data by a standard-dynamic-range photoelectric conversion characteristic, into the first video stream including the encoded image data of the first image data.
8. A reception device comprising
circuitry configured to
receive a container including a predetermined number of video streams, wherein
the predetermined number of video streams includes 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 that are obtained by processing high-frame-rate ultra-high-definition image data,
the container includes a first video stream including encoded image data of the first image data and encoded image data of the second image data, and a second video stream including encoded image data of the third image data and encoded image data of the fourth image data,
information is inserted into the container in a state in which the first and second video streams are each managed with two tracks, 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, and
the circuitry is configured to obtain the image data by selectively extracting predetermined encoded image data from the encoded image data of the first to fourth image data and performing decoding processing, based on the information inserted into the container, depending on decoding capability.
9. The reception device according to claim 8 , wherein
the high-frame-rate ultra-high-definition image data is transmission image data having a high-dynamic-range photoelectric conversion characteristic given by performing photoelectric conversion by the high-dynamic-range photoelectric conversion characteristic on high-dynamic-range image data,
conversion characteristic information indicating the high-dynamic-range photoelectric conversion characteristic or an electro-optical conversion characteristic corresponding to the high-dynamic-range photoelectric conversion characteristic is inserted into the first video stream including the encoded image data of the first image data, and
the circuitry is configured to obtain display image data by performing electro-optical conversion on the image data obtained by the decoding processing based on the conversion characteristic information.
10. The reception device according to claim 8 , wherein
the high-frame-rate ultra-high-definition image data is transmission image data having a high-dynamic-range photoelectric conversion characteristic given by performing photoelectric conversion by the high-dynamic-range photoelectric conversion characteristic on high-dynamic-range image data,
the high-dynamic-range photoelectric conversion characteristic is a characteristic of a PQ curve,
conversion information for conversion of a value of conversion data by the characteristic of the PQ curve to a value of conversion data by a standard-dynamic-range photoelectric conversion characteristic is inserted into the first video stream including the encoded image data of the first image data, and
the circuitry is configured to, when performing standard-dynamic-range display,
obtain standard-dynamic-range transmission image data by performing dynamic range conversion on the image data obtained by the decoding processing based on the conversion information, and
obtain display image data by performing electro-optical conversion by a standard-dynamic-range electro-optical conversion characteristic on the standard-dynamic-range transmission image data.
11. A reception method comprising
receiving, by circuitry, a container including a predetermined number of video streams, wherein
the predetermined number of video streams includes 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 that are obtained by processing high-frame-rate ultra-high-definition image data,
the container includes a first video stream including encoded image data of the first image data and encoded image data of the second image data, and a second video stream including encoded image data of the third image data and encoded image data of the fourth image data,
information is inserted into the container in a state in which the first and second video streams are each managed with two tracks, 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, and
the reception method further comprises obtaining, by the circuitry, the image data by selectively extracting predetermined encoded image data from the encoded image data of the first to fourth image data and performing decoding processing, based on the information inserted into the container, depending on decoding capability.