Patent ID: 11902557
Assignee: BYTEDANCE INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A video processing method, comprising:
performing a conversion between a video comprising one or more pictures comprising one or more slices and a bitstream of the video,
wherein the bitstream conforms to a format rule,
wherein the format rule specifies that a constraint on a syntax element included in the bitstream indicating a slice type of a slice of the one or more slices depends on at least one condition,
wherein the at least one condition is based on at least one of a general constraint flag, a network abstraction layer unit type, or whether the slice is in a first picture of an access unit,
wherein the format rule further specifies that a flag in a picture header controls applicability of adaptive loop filtering of all slices in the picture,
wherein a zero value of the flag indicates that the adaptive loop filtering is disabled for all slices in the picture,
wherein a one value of the flag indicates that the adaptive loop filtering is enabled for all slices in the picture, and
wherein the at least one condition comprises that a value of the general constraint flag is equal to 1 and indicates an intra-only constraint for the slice, and the constraint on the syntax element is that a value of the syntax element is equal to 2.