Patent ID: 9479774
Filing Date: 2016-10-25
CPC Classification: H04N

Claim Text:
1. A method for determining bitstream conformance, the method comprising: receiving an encoded video bitstream that includes a buffering period supplemental enhancement information (SEI) message, wherein buffering period SEI messages are subject to a restriction that no buffering period SEI message in the bitstream can be associated with an access unit (AU) with a TemporalId greater than 0, the buffering period SEI message providing information of an initial Coded Picture Buffer (CPB) removal delay and an initial CPB removal delay offset, the buffering period SEI message comprising an initial CPB removal delay syntax element for a schedule selection index, the initial CPB removal delay syntax element is an initial alternative CPB removal delay syntax element for the schedule selection index, a Hypothetical Reference Decoder (HRD) including a buffering model of a coded picture buffer (CPB) and a decoded picture buffer (DPB), bitstream conformance being specified as part of a specification of the HRD, the HRD relying on the buffering period SEI message, a picture timing SEI message, and HRD parameters provided in the bitstream in an hrd_parameters( )syntax structure in a video parameter set (VPS) or a sequence parameter set (SPS), the bitstream representing video blocks of an encoded video slice of a picture and associated syntax elements, the picture having a TemporalId equal to 1; and setting a value of an initial CPB removal delay variable for the schedule selection index to the initial CPB removal delay syntax element for the schedule selection index when DefaultInitCpbParamsFlag is equal to 0.