Encoder, decoder, encoding method, and decoding method
An encoder includes memory and circuitry coupled to the memory. The circuitry stores a total number of temporal sub-layers in a bitstream Into either a picture timing supplemental enhancement information (SEI) message or a buffering period SEI message, and encodes the total number of the temporal sub-layers.
1 . An encoder comprising:
memory; and
circuitry coupled to the memory,
wherein in operation, the circuitry:
stores first information indicating a number of temporal sub-layers into a buffering period supplemental enhancement information (SEI) message; and
generates a bitstream including the buffering period SEI message and a picture timing SEI message, wherein
the picture timing SEI message includes a loop structure repeated the number of times indicated by the first information, and each of loops includes a parameter related to a timing to extract data from a coded picture buffer (CPB).
2 . An encoding method comprising:
storing first information indicating a number of temporal sub-layers into a buffering period supplemental enhancement information (SEI) message; and
generating a bitstream including the buffering period SEI message and a picture timing SEI message, wherein
the picture timing SEI message includes a loop structure repeated the number of times indicated by the first information, and each of loops includes a parameter related to a timing to extract data from a coded picture buffer (CPB).
3 . A decoder comprising:
memory; and
circuitry coupled to the memory,
wherein in operation, the circuitry:
obtains a buffering period supplemental enhancement information (SEI) message and a picture timing SEI message; and
obtains first information indicating a number of temporal sub-layers from the buffering period SEI message, wherein
the picture timing SEI message includes a loop structure repeated the number of times indicated by the first information, and each of loops includes a parameter related to a timing to extract data from a coded picture buffer (CPB).
4 . A decoding method comprising:
obtaining a buffering period supplemental enhancement information (SEI) message and a picture timing SEI message; and
obtaining first information indicating a number of temporal sub-layers from the buffering period SEI message, wherein
the picture timing SEI message includes a loop structure repeated the number of times indicated by the first information, and each of loops includes a parameter related to a timing to extract data from a coded picture buffer (CPB).