Transmission device, transmitting method, reception device, and receiving method
In the case where image data of a super-high definition service is transmitted without scalable coding, image data suitable to own display capability in a receiver not supporting the super-high definition service can be easily obtained. A container in a predetermined format having a video stream including encoded image data is transmitted. Auxiliary information for downscaling a spatial and/or temporal resolution of the image data is inserted into the video stream. For example, the auxiliary information indicates a limit of accuracy for a motion vector included in the encoded image data. Further, for example, the auxiliary information identifies a picture to be selected at the time of downscaling the temporal resolution at a predetermined ratio.
1. A reception device, comprising:
receiving circuitry configured to receive a broadcast signal having a video stream, the video stream including encoded image data and auxiliary information for a super-high resolution of the encoded image data; and
processing circuitry configured to
process identifying information for a super-high definition service of the video stream,
apply processing for the super-high resolution to the encoded image data based on the auxiliary information, and
obtain display image data for display,
wherein the identifying information is included in a layer of the broadcast signal, such that the super-high definition service of the video stream can be identified at least on a per program basis.
2. The reception device according to claim 1 , wherein a super-high resolution image for the super-high definition service has a 4K resolution or an 8K resolution.
3. The reception device according to claim 1 , wherein the identifying information includes spatial and/or temporal resolution information of the image data.
4. The reception device according to claim 3 , wherein support information indicating whether the video stream is provided with support for a decoder not supporting a spatial and/or temporal resolution of the image data is included in the identifying information.
5. The reception device according to claim 3 , wherein a temporal super-high-resolution image for the super-high definition service has a frame frequency of 60 Hz or 120 Hz.
6. A receiving method, comprising:
receiving a broadcast signal having a video stream, the video stream including encoded image data and auxiliary information for a super-high resolution of the encoded image data; and
in a case that identifying information indicates a super-high definition service,
applying processing for the super-high resolution to the encoded image data based on the auxiliary information, and
obtaining display image data for display,
wherein the identifying information is included in a layer of the broadcast signal, such that the super-high definition service of the video stream can be identified at least on a per program basis.
7. A transmission device including:
transmission circuitry configured to transmit a broadcast signal in a predetermined format having a video stream including encoded image data; and
processing circuitry configured to insert, into a layer of the broadcast signal, identifying information such that a super-high definition service of the video stream can be identified at least on a per program basis.
8. The transmission device according to claim 7 , wherein a super-high resolution image for the super-high definition service has a 4K resolution or an 8K resolution.
9. The transmission device according to claim 7 , wherein the identifying information includes spatial and/or temporal resolution information of the image data.
10. The transmission device according to claim 7 , wherein support information indicating whether the video stream is provided with support for a decoder not supporting a spatial and/or temporal resolution of the image data is added to the identifying information.
11. A transmitting method including steps of:
transmitting a broadcast signal in a predetermined format having a video stream including image data; and
inserting, into a layer of the broadcast signal, identifying information such that a super-high definition service by the video stream can be identified at least on a per program basis.