Patent ID: 11924418
Assignee: BYTEDANCE INC.
Field: nan (nan)
Classification: CPC nan | IPC H

Claim 18:
19. The non-transitory computer-readable recording medium of claim 17, wherein the format rule specifies whether a value of a third syntax element indicating whether a scaling list APS network abstraction layer (NAL) unit is allowed to include chroma related syntax elements included in an APS is constrained or not based on whether a fourth syntax element at the picture level indicating the APS identifier that a picture refers to is present or not and whether the index of color format is equal to 0 or not,
wherein when the fourth syntax element is present and the index of color format is equal to 0, the value of the third syntax element of the scaling list APS NAL unit having the APS identifier equal to the fourth syntax element are constrained to be equal to 0, wherein the third syntax element equal to 0 indicates that the scaling list APS NAL unit is not allowed to include the chroma related syntax elements,
wherein the format rule specifies that when the index of color format is equal to 0, a value of a fifth syntax element of a luma mapping with chroma scaling (LMCS) APS NAL unit having the APS identifier equal to a sixth syntax element at the picture level indicating the APS identifier that the picture refers to is inferred to be equal to 0,
wherein the format rule specifies that when a value of a seventh syntax element is equal to 1 which indicates no picture partitioning is applied to the picture, a value of an eighth syntax element included in a picture parameter set is inferred to be equal to 1 which indicates that each subpicture of the picture consists of one and only one rectangular slice, and
wherein the format rule specifies to include a flag at a picture parameter set level indicating a presence of i) cu_qp_delta_abs specifying an absolute value of a variable indicating a difference between a luma quantization parameter for a coding unit and its prediction and ii) cu_qp_delta_sign_flag specifying a sign of the absolute value of the variable in both a transform unit syntax and a palette coding syntax.