Patent ID: 11917172
Assignee: BYTEDANCE INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 19:
20. A non-transitory computer-readable recording medium storing a bitstream of a video which is generated by a method performed by a video processing apparatus, wherein the method comprises:
generating the bitstream of the video,
wherein the bitstream is organized into a plurality of access units (AUs), AU 0 to AU n, where n is a positive integer, each AU comprising one or more pictures,
wherein the bitstream is generated according to a first format rule, and
wherein the first format rule specifies a first constraint related to a removal time of AU 0, wherein the first constraint is based on (i) a value equal to a product of a maximum number of slices per picture and a number of pictures in an access unit and (ii) a maximum size of the access unit;, wherein the first constraint specifies that a number of slices in AU 0 is less than or equal to:

Min(Max(1,MaxSlicesPerAu×MaxLumaSr/MaxLumaPs×(AuCpbRemovalTime[0]−AuNominalRemovalTime[0])+MaxSlicesPerAu×AuSizeMaxInSamplesY[0]/MaxLumaPs),MaxSlicesPerAu), and

wherein MaxSlicesPerAu is a maximum number of slices per access unit, MaxLumaSr is a maximum luma sample rate, MaxLumaPs is a maximum luma picture size, AuCpbRemovalTime[m] is a CPB removal time of an m-th access unit, AuNominalRemovalTime[m] is a nominal CPB removal time of the m-th access unit, and AuSizeMaxInSamplesY[m] is a maximum size, in luma samples, of a decoded picture.