Video reception method, video transmission method, video reception apparatus, and video transmission apparatus

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.