公开(公告)号：WO2021252973A1

公开(公告)日：2021-12-16

申请号：PCT/US2021/037118

申请日：2021-06-11

Applicant: BYTEDANCE INC.

Inventor： WANG, Ye-kui

IPC: H04N9/80 ,  H04N19/30 ,  H04N19/463 ,  H04N19/573 ,  H04N19/70 ,  H04N9/8045

Abstract: Methods, systems and devices for picture header constraints for multi-layer coding are described. An example method of video processing includes performing a conversion between a video comprising one or more pictures and a bitstream of the video, wherein the bitstream conforms to a format rule, wherein the format rule specifies a constraint on a value of a first syntax element that specifies whether a second syntax element is present in a picture header syntax structure of a current picture, and wherein the second syntax element specifies a value of a picture order count (POC) most significant bit (MSB) cycle of the current picture.