Patent ID: 11956474
Assignee: BEIJING BYTEDANCE NETWORK TECHNOLOGY CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 13:
14. The apparatus of claim 10, wherein the rule specifies that one or more syntax elements in a sequence parameter set, a picture parameter set, a picture header, or a slice header are constrained according to a fourth syntax element included in the general constraint information syntax structure, and wherein the fourth syntax element specifies whether no network abstraction layer (NAL) unit with NAL unit type equal to PREFIX_APS_NUT or SUFFIX_APS_NUT is present, and
wherein when a value of the fourth syntax element is equal to 1 and specifies that no NAL unit with NAL unit type equal to PREFIX_APS_NUT or SUFFIX_APS_NUT is present,
a value of a fifth syntax element in the sequence parameter set is constrained to be equal to 0, which specifies that a cross-component adaptive loop filter is disabled,
a value of a sixth syntax element in the picture header is constrained to be equal to 0, which specifies that a number of adaptive loop filter (ALF) adaptive parameter sets (APSs) that a picture refers to is equal to 0,
a value of a seventh syntax element in the slice header is constrained to be equal to 0, which specifies that a number of ALF APS that a slice refers to is equal to 0,
a value of an eighth syntax element in the picture header is constrained to be equal to 0, which specifies that the adaptive loop filter is disabled for a Cb colour component of a picture,
a value of a ninth syntax element in the picture header is constrained to be equal to 0, which specifies that the adaptive loop filter is disabled for a Cr colour component of a picture,
a value of a tenth syntax element in the slice header is constrained to be equal to 0, which specifies that the adaptive loop filter is disabled for a Cb colour component of a slice,
a value of an eleventh syntax element in the slice header is constrained to be equal to 0, which specifies that the adaptive loop filter is disabled for a Cr colour component of a slice.