Video reception method, video transmission method, video reception apparatus, and video transmission apparatus
Provided is a video reception method performed by a video reception apparatus including a display. The video reception method includes: receiving a reception signal multiplexed from video data and audio data; outputting, as first transfer characteristics information, transfer characteristics obtained by demultiplexing the reception signal; outputting, as second transfer characteristics information, transfer characteristics obtained by decoding the video data, the second transfer characteristics information being information for specifying, at frame accuracy, a transfer function corresponding to a luminance dynamic range of the video data; and displaying the video data while controlling a luminance dynamic range of the display at frame accuracy according to the second transfer characteristics information.
1. A decoding method for decoding video data, comprising:
receiving a multiplexed signal transmitted from a transmission apparatus, a multiplexing layer and a video coding layer being provided in the multiplexed signal, the multiplexing layer including first information indicating first transfer characteristics, the video coding layer including a first frame, a second frame following the frame in a time axis, and a Sequence Parameter Set (SPS), the SPS including second information indicating second transfer characteristics different from the first transfer characteristics; and
controlling a display to sequentially display the first frame and the second frame while controlling a luminance dynamic range of the display based on at least one of the first information or the second information, wherein
the first information is provided in the multiplexing layer not to be synchronized with the second frame, and
the second information is provided in the SPS to be synchronized with the second frame.
2. The decoding method according to claim 1 , wherein the first information is provided in a descriptor in the multiplexing layer.
3. The decoding method according to claim 1 , further comprising:
determining whether the video coding layer is correctly obtained; and
changing the luminance dynamic range to a Standard Dynamic Range (SDR) if the video coding layer is determined not to correctly be obtained.
4. The decoding method according to claim 1 , wherein the luminance dynamic range is controlled so as to suppress a luminance of the display when starting displaying of the second frame.
5. The decoding method according to claim 4 , wherein the luminance dynamic range is changed to be Standard Dynamic Range (SDR) to suppress the luminance when starting displaying of the second frame.
6. A decoding apparatus for decoding video data, comprising:
a receiver configured to receive a multiplexed signal transmitted from a transmission apparatus, a multiplexing layer and a video coding layer being provided in the multiplexed signal, the multiplexing layer including first information indicating first transfer characteristics, the video coding layer including a first frame, a second frame following the frame in a time axis, and a Sequence Parameter Set (SPS), the SPS including second information indicating second transfer characteristics different from the first transfer characteristics; and
a processor configured to control a display to sequentially display the first frame and the second frame while controlling a luminance dynamic range of the display based on at least one of the first information or the second information, wherein
the first information is provided in the multiplexing layer not to be synchronized with the second frame, and
the second information is provided in the SPS to be synchronized with the second frame.
7. A decoding method for decoding video data, comprising:
receiving a multiplexed signal transmitted from a transmission apparatus, the multiplexed signal including a video coding layer, the video coding layer including a first frame, a second frame following the frame in a time axis, and a Sequence Parameter Set (SPS), the SPS including information indicating transfer characteristics; and
controlling a display to sequentially display the first frame and the second frame while controlling a luminance dynamic range of the display based on the information, wherein
the luminance dynamic range is controlled so as to suppress a luminance of the display regardless of the transfer characteristics indicated by the information when starting displaying of the second frame.
8. The decoding method according to claim 7 , wherein the luminance dynamic range is changed to be Standard Dynamic Range (SDR) to suppress the luminance when starting displaying of the second frame.