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 a video signal and an audio signal; obtaining the video signal and first transfer characteristics information by demultiplexing the reception signal, the first transfer characteristics information being information for specifying, per random access unit, a transfer function corresponding to a luminance dynamic range of the video signal; obtaining video data by decoding the video signal obtained; and displaying the video data while controlling a luminance dynamic range of the display per random access unit according to the first transfer characteristics information.
1 . A decoding method, performed by a decoding device, comprising:
receiving a system stream including a coded video and a first parameter, the first parameter indicating first transfer characteristics provided to decode the coded video;
reading a first flag included in the system stream, the first flag indicating whether the first transfer characteristics are to be updated;
read a second parameter in the system stream indicating updated transfer characteristics if the first flag indicates that the first transfer characteristics are to be updated; and
decoding the coded video with the first transfer characteristics or the updated transfer characteristics in response to the first flag, wherein
each of the first transfer characteristics and the updated transfer characteristics relates to optical-electro conversion or electro-optical conversion,
the first flag is provided in the system stream per processing unit, processing units being included in random access units, and
when the first flag for a processing unit included in the processing units indicates that the first transfer characteristics are to be updated, a coded video corresponding to the processing unit is decoded with the updated transfer characteristics indicated by a second parameter provided for the processing unit corresponding to the coded video.
2 . A decoding device comprising:
a receiver configured to receive a system stream including a coded video and a first parameter, the first parameter indicating first transfer characteristics provided to decode the coded video; and
a signal processor configured to:
read a first flag included in the system stream, the first flag indicating whether the first transfer characteristics are to be updated;
read a second parameter in the system stream indicating updated transfer characteristics if the first flag indicates that the first transfer characteristics are to be updated; and
decode the coded video with the first transfer characteristics or the updated transfer characteristics in response to the first flag, wherein
each of the first transfer characteristics and the updated transfer characteristics relates to optical-electro conversion or electro-optical conversion,
the first flag is provided in the system stream per processing unit, processing units being included in random access units, and
when the first flag for a processing unit included in the processing units indicates that the first transfer characteristics are to be updated, a coded video corresponding to the processing unit is decoded with the updated transfer characteristics indicated by a second parameter provided for the processing unit corresponding to the coded video.