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 video reception method performed by a video reception apparatus including a display, the video reception method comprising:
receiving a reception signal multiplexed from a video signal and an audio signal;
obtaining the video signal and transfer characteristics information by demultiplexing the reception signal, the 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 transfer characteristics information, wherein
the transfer characteristics information is included in control information that is included in the reception signal, the control information being information for a program including a plurality of random access units, and
the transfer characteristics information includes:
first information for specifying a current transfer function;
second information indicating whether or not the current transfer function will be switched in the program;
third information for specifying a transfer function to be switched to; and
fourth information for specifying a random access unit in which the transfer function will be switched.
2. A video transmission method, comprising:
generating a video signal by coding video data;
generating a transmission signal by multiplexing the video signal generated and an audio signal, the transmission signal including transfer characteristics information for specifying, per random access unit, a transfer function corresponding to a luminance dynamic range of the video signal; and
transmitting the transmission signal, wherein
the transfer characteristics information is included in control information that is included in the transmission signal, the control information being provided per group of random access units, and
the transfer characteristics information includes:
first information for specifying a current transfer function;
second information indicating whether or not the current transfer function will be switched in the group of random access units;
third information for specifying a transfer function to be switched to; and
fourth information for specifying a random access unit in which the transfer function will be switched.