Transmitting device, transmitting method, receiving device, and receiving method
The present invention enables a receiving side to easily recognize a high-quality format corresponding to encoded image data included in an extended video stream. Two video streams including a basic video stream including encoded image data of basic format image data, and an extended video stream including encoded image data of high-quality format image data of one type selected from a plurality of types are generated. A container of a predetermined format including the basic video stream and the extended video stream is transmitted. Information indicating a high-quality format corresponding to the encoded image data included in the extended video stream is inserted into the extended video stream and/or the container.
1. A transmitting device, comprising:
circuitry configured to:
generate a basic video stream including first encoded image data of first image data of a basic format, and an extended video stream including second encoded image data of second image data of a type of high-quality format that is selected from a plurality of selectable types of high-quality format, the first image data corresponding to a first dynamic range, the second encoded image data including an encoded component of image data corresponding to a second dynamic range that is greater than the first dynamic range, wherein
the encoded component of image data corresponding to the second dynamic range corresponds to difference information between the first image data and the image data corresponding to the second dynamic range, and
the encoded component of image data corresponding to the second dynamic range is, for at least a dynamic range, extension of the first image data from the first dynamic range to the second dynamic range, and
generate a container that includes the basic video stream, the extended video stream, and scalable information, the scalable information including a first field that specifies the type of high-quality format corresponding to the second encoded image data; and
a transmitter configured to transmit the container.
2. The transmitting device according to claim 1 , wherein the scalable information includes a second field that indicates a length of the scalable information.
3. The transmitting device according to claim 1 , wherein the transmitter is configured to transmit the container through a broadcast path.
4. The transmitting device according to claim 1 , wherein the transmitter is configured to transmit the container through a network path.
5. The transmitting device according to claim 1 , wherein the container is in an MPEG Media Transport (MMT) format or an MP4 format.
6. The transmitting device according to claim 1 , wherein
the extended video stream has an NAL unit structure, and
the scalable information is included in a header of an NAL unit of the extended video stream.
7. The transmitting device according to claim 1 , wherein
the extended video stream has an NAL unit structure, and
the scalable information is included in an SEI NAL unit of the extended video stream.
8. The transmitting device according to claim 1 , wherein
the container is an MPEG2-TS, and
the scalable information is a descriptor included in a program map table of the MPEG2-TS.
9. A transmitting method, comprising:
generating, by circuitry of a device, a basic video stream including first encoded image data of first image data of a basic format, and an extended video stream including second encoded image data of second image data of a type of high-quality format that is selected from a plurality of selectable types of high-quality format, the first image data corresponding to a first dynamic range, the second encoded image data including an encoded component of image data corresponding to a second dynamic range that is greater than the first dynamic range, wherein
the encoded component of image data corresponding to the second dynamic range corresponds to difference information between the first image data and the image data corresponding to the second dynamic range, and
the encoded component of image data corresponding to the second dynamic range is, for at least a dynamic rang, extension of the first image data from the first dynamic range to the second dynamic range;
generating, by the circuitry of the device, a container that includes the basic video stream, the extended video stream, and scalable information, the scalable information including a first field that specifies the type of high-quality format corresponding to the second encoded image data; and
transmitting, by a transmitter of the device, the container.
10. A receiving device, comprising:
a receiver configured to receive a container that includes a basic video stream, an extended video stream, and scalable information,
the basic video stream including first encoded image data of first image data of a basic format,
the extended video stream including second encoded image data of second image data of a type of high-quality format that is selected from a plurality of selectable types of high-quality format, the first image data corresponding to a first dynamic range, the second encoded image data including an encoded component of image data corresponding to a second dynamic range that is greater than the first dynamic range, wherein
the encoded component of image data corresponding to the second dynamic range corresponds to difference information between the first image data and the image data corresponding to the second dynamic range, and
the encoded component of image data corresponding to the second dynamic range is, for at least a dynamic rang, extension of the first image data from the first dynamic range to the second dynamic range, and
the scalable information including a first field that specifies the type of high-quality format corresponding to the second encoded image data; and
circuitry configured to:
extract the scalable information from the container, and
obtain the first image data from the basic video stream or obtain the second image data from the extended video stream, as display image data, on a basis of the extracted scalable information.
11. The receiving device according to claim 10 , further comprising a display configured to display the display image data,
wherein the circuitry is configured to obtain the first image data or the second image data on a basis of a display capability of the display.
12. The receiving device according to claim 10 , wherein the scalable information includes a second field that indicates a length of the scalable information.
13. The receiving device according to claim 10 , wherein the receiver is configured to receive the container through a broadcast path.
14. The receiving device according to claim 10 , wherein the receiver is configured to receive the container through a network path.
15. The receiving device according to claim 10 , wherein the circuitry is configured to receive capability information from a display device connected to the receiving device, the capability information indicating a display capability of the display.
16. The receiving device according to claim 10 , wherein the container is in an MPEG Media Transport (MMT) format or an MP4 format.
17. The receiving device according to claim 10 , wherein
the extended video stream has an NAL unit structure, and
the scalable information is included in a header of an NAL unit of the extended video stream.
18. The receiving device according to claim 10 , wherein
the extended video stream has an NAL unit structure, and
the scalable information is included in an SEI NAL unit of the extended video stream.
19. The receiving device according to claim 10 , wherein
the container is an MPEG2-TS, and
the scalable information is a descriptor included in a program map table of the MPEG2-TS.
20. The receiving device according to claim 10 , further comprising a display configured to display the display image data,
wherein the display is a liquid crystal display (LCD) or an organic electro-luminescence (EL) display.