Patent ID: 9654802
Date: 2017-05-16
CPC Classifications: H04N

Claim:
1. A method for decoding video data, the method comprising: receiving a bitstream that includes a sequence parameter set (SPS) that is active for a coded picture associated with a picture timing Supplemental Enhancement Information (SEI) message, the SPS including a Hypothetical Reference Decoder (HRD) parameters syntax structure: obtaining, from the HRD parameters syntax structure of the SPS, a sequence level flag, the sequence level flag equal to 1 specifying that sub-picture level coded picture buffer (CPB) removal delay parameters are present in the picture timing SEI message and specifying no sub-picture timing SEI message is present, the sequence level flag equal to 0 specifying that sub-picture level CPB removal delay parameters are present in sub-picture timing SEI messages and specifying the picture timing SEI message does not include sub-picture level CPB removal delay parameters; based on the sequence level flag being equal to 0: setting a CPB removal time of the DU to the nominal CPB removal time of the DU; and at a time based on the CPB removal time of the DU, decoding video data associated with the DU.