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 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, program information, and event information, and transmit a layer of the video stream; and
insert first metadata information indicating a standard dynamic range opto-electronic transfer characteristic into the layer of the video stream, the layer corresponding to a first region of video usability information (VUI) of a sequence parameter set (SPS) network abstract layer (NAL) unit, and insert second metadata information indicating a high dynamic range opto-electronic transfer characteristic into a layer of the container.
2. The transmission apparatus according to claim 1 , wherein the circuitry is further configured to insert third metadata information for a display control together with the second metadata information indicating the high dynamic range opto-electronic transfer characteristic.
3. The transmission apparatus according to claim 2 , wherein the third metadata information for the display control includes peak brightness information.
4. The transmission apparatus according to claim 2 , wherein the third metadata information for the display control includes region information indicating a region in which a brightness conversion is permitted.
5. The transmission apparatus according to claim 1 , wherein
the container is a transport stream,
the program information is a program map table (PMT), and
when inserting the second metadata information indicating the high dynamic range opto-electronic transfer characteristic into the layer of the container, the circuitry is further configured to insert the second metadata information under the PMT.
6. The transmission apparatus according to claim 1 , wherein
the container is a transport stream,
the event information is an event information table (EIT), and
when inserting the second metadata information indicating the high dynamic range opto-electronic transfer characteristic into the layer of the container, the circuitry is further configured to insert the second metadata information under the EIT.
7. A transmission method comprising:
performing a high dynamic range opto-electronic conversion on high dynamic range video data to obtain transmission video data;
performing encoding processing on the transmission video data to obtain a video stream;
transmitting, by a transmission circuit, a container including the video stream, program information, and event info, illation, and transmitting a layer of the video stream; and
inserting first metadata information indicating a standard dynamic range opto-electronic transfer characteristic into the layer of the video stream, the layer corresponding to a first region of video usability information (VUI) of a sequence parameter set (SPS) network abstract layer (NAL) unit, and inserting second metadata information indicating a high dynamic range opto-electronic transfer characteristic into a layer of the container.
8. A reception apparatus comprising:
circuitry configured to:
receive a container including a video stream, program information, and event information and receive a layer of the video stream, the video stream being obtained through encoding of transmission video data; and
perform decoding processing on the video stream to obtain the transmission video data,
wherein when first metadata information indicating a standard dynamic range opto-electronic transfer characteristic is inserted into the layer of the video stream, the layer corresponding to a first region of video usability information (VUI) of a sequence parameter set (SPS) network abstract layer (NAL) unit, and second metadata information indicating a high dynamic range opto-electronic transfer characteristic is inserted into a layer of the container, based on the second metadata information indicating the high dynamic range opto-electronic transfer characteristic, the circuitry is further configured to perform a high dynamic range electro-optical conversion with a characteristic opposite to the high dynamic range opto-electronic transfer characteristic on the transmission video data to obtain the video data for display.
9. The reception apparatus according to claim 8 , wherein the circuitry is further configured to perform a display brightness adjustment on the video data for display,
wherein when third metadata information for a display control is inserted together with the second metadata information indicating the high dynamic range opto-electronic transfer characteristic, the circuitry is further configured to perform the display brightness adjustment on the video data for display based on the third metadata information for the display control.
10. The reception apparatus according to claim 9 , wherein
the third metadata information for a display control includes region information indicating a region in which a brightness conversion is permitted, and
the circuitry is further configured to perform the display brightness adjustment in the region in which the brightness conversion is permitted.
11. A reception method comprising:
receiving, by circuitry of a reception apparatus, a container including a video stream, program information, and event information, and receiving a layer of the video stream, the video stream being obtained through encoding of transmission video data;
performing decoding processing on the video stream to obtain the transmission video data; and
performing an electro-optical conversion on the transmission video data to obtain video data for display,
wherein when first metadata information indicating a standard dynamic range opto-electronic transfer characteristic is inserted into the layer of the video stream, the layer corresponding to a first region of video usability information (VUI) of a sequence parameter set (SPS) network abstract layer (NAL) unit, and second metadata information indicating high dynamic range opto-electronic transfer characteristic is inserted into a layer of the container, based on the second metadata information indicating the high dynamic range opto-electronic transfer characteristic, performing the electro-optical conversion comprises performing a high dynamic range electro-optical conversion with a characteristic opposite to the high dynamic range opto-electronic transfer characteristic on the transmission video data to obtain the video data for display.