Transmission apparatus, transmission method, reception apparatus, and reception method
Both a conventional receiver and an HDR-compatible receiver well perform electro-optical conversion processing on transmission video data obtained by using an HDR opto-electronic transfer characteristic. High dynamic range opto-electronic conversion is performed on high dynamic range video data to obtain the transmission video data. Encoding processing is performed on this transmission video data to obtain a video stream. A container of a predetermined format including this video stream is transmitted. Metadata information indicating a standard dynamic range opto-electronic transfer characteristic is inserted into a layer of the video stream, and metadata information indicating a high dynamic range opto-electronic transfer characteristic is inserted into at least one of the layer of the video stream and a layer of the container.
1. A transmission apparatus, comprising:
circuitry configured to
perform a high dynamic range opto-electronic conversion on high dynamic range (HDR) video data to obtain transmission video data;
perform encoding processing on the transmission video data to obtain a video stream;
transmit a container including the video stream; and
insert first metadata information indicating a standard dynamic range (SDR) opto-electronic transfer curve into the video stream, insert second metadata information indicating a HDR opto-electronic transfer curve into the container or the video stream, and insert third metadata information for display control into the video stream, the SDR opto-electronic transfer curve and the HDR opto-electronic transfer curve each relating a brightness level to a code value.
2. The transmission apparatus according to claim 1 , wherein the third metadata information for display control includes peak brightness information.
3. The transmission apparatus according to claim 1 , wherein the circuitry is further configured to insert the first metadata information into a region of a sequence parameter set network abstract layer (NAL) unit of the video stream, and insert the third metadata information for display control into a region of a supplemental enhancement information NAL unit of the video stream.
4. The transmission apparatus according to claim 1 , wherein the circuitry is further configured to insert the second metadata information into a region of a supplemental enhancement information network abstract layer unit of the video stream.
5. The transmission apparatus according to claim 1 , wherein the circuitry is further configured to insert the second metadata information into program information or event information of the container.
6. A reception apparatus, comprising:
receiver circuitry configured to receive a container including a video stream, the video stream being obtained through encoding process performed on transmission video data, wherein
first metadata information indicating a standard dynamic range (SDR) opto-electronic transfer curve is inserted into the video stream, second metadata information indicating a high dynamic range (HDR) opto-electronic transfer curve is inserted into the container or the video stream, and third metadata information for display control is inserted into the video stream, the SDR opto-electronic transfer curve and the HDR opto-electronic transfer curve each relating a brightness level to a code value; and
processing circuitry is configured to
perform decoding processing on the video stream to obtain the transmission video data,
perform a HDR electro-optical conversion, with a characteristic opposite to the HDR opto-electronic transfer curve, on the transmission video data to obtain video data for display, based on the second metadata information indicating the HDR opto-electronic transfer curve, and
perform a display brightness adjustment on the video data for display based on the third metadata information for display control.
7. The reception apparatus according to claim 6 , wherein the third metadata information for display control includes peak brightness information.
8. The reception apparatus according to claim 6 , wherein the first metadata information is inserted into a region of a sequence parameter set network abstract layer (NAL) unit of the video stream, and the third metadata information for display control is inserted into a region of a supplemental enhancement information NAL unit of the video stream.
9. The reception apparatus according to claim 6 , wherein the second metadata information is inserted into a region of a supplemental enhancement information network abstract layer unit of the video stream.
10. The reception apparatus according to claim 6 , wherein the second metadata information is inserted into program information or service information of the container.
11. A reception method, comprising:
receiving, by receiver circuitry, a container including a video stream, the video stream being obtained through encoding process performed on transmission video data, wherein
first metadata information indicating a standard dynamic range (SDR) opto-electronic transfer curve is inserted into the video stream, second metadata information indicating a high dynamic range (HDR) opto-electronic transfer curve is inserted into the container or the video stream, and third metadata information for display control is inserted into the video stream, the SDR opto-electronic transfer curve and the HDR opto-electronic transfer curve each relating a brightness level to a code value;
performing, by processing circuitry, decoding processing on the video stream to obtain the transmission video data;
performing, by the processing circuitry, a HDR electro-optical conversion, with a characteristic opposite to the HDR opto-electronic transfer curve on the transmission video data, to obtain video data for display based on the second metadata information indicating the HDR opto-electronic transfer curve; and
performing, by the processing circuitry, a display brightness adjustment on the video data for display based on the third metadata information for display control.
12. The reception method according to claim 11 , wherein the third metadata information for display control includes peak brightness information.
13. The reception method according to claim 11 , wherein the first metadata information is inserted into a region of a sequence parameter set network abstract layer (NAL) unit of the video stream, and the third metadata information for display control is inserted into a region of a supplemental enhancement information NAL unit of the video stream.
14. The reception method according to claim 11 , wherein the second metadata information is inserted into a region of a supplemental enhancement information network abstract layer unit of the video stream.
15. The reception method according to claim 11 , wherein the second metadata information is inserted into program information or service information of the container.
16. The transmission apparatus of claim 1 , wherein the circuitry is configured to insert the second metadata information indicating the HDR opto-electronic transfer curve, which indicates a relationship between an input brightness level and a code value for the HDR video data.