Patent ID: 11968402
Assignee: BEIJING BYTEDANCE NETWORK TECHNOLOGY CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 13:
14. A non-transitory computer-readable storage medium storing instructions that cause a processor to:
perform a conversion between a video and a bitstream of the video according to a format rule,
wherein the format rule specifies that a bitstream general constraint is present to constraint a range of syntax elements;
wherein the format rule specifies that a first syntax element in a picture header (PH) or a second syntax element in a slice header (SH) in the bitstream is conditionally set equal to a predetermined value based on a value of a first general constraint flag which indicates whether a constraint is imposed on presence of only intra slices, and
wherein the second syntax element which is a reference picture list (RPL)-related SH syntax element is excluded from the SH and inferred to be 1 when the first general constraint flag is equal to 1 which indicates that the constraint is imposed on presence of only intra slices, and wherein the second syntax element is indicative of a presence of a third syntax element identifying a maximum index for a reference picture used for coding a slice referring to the second syntax element.