Constraints On Adaptation Parameter Set Syntax Elements
AssigneesBeijing Bytedance Network Technology Co., Ltd., Bytedance Inc.
InventorsZhipin Deng, Li Zhang, Ye-Kui Wang, Kai Zhang, Jizheng Xu
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Abstract
Systems, methods and apparatus for video processing are described. The video processing may include video encoding, video decoding, or video transcoding. One example method of video processing includes performing a conversion between a video and a bitstream of the video according to a format rule. The format rule specifies that a first field at a sequence level or a picture level or a slice level controls a value of a second field in an adaptation parameter set.
Claims20
A method of video processing, comprising:
- performing a conversion between a video and a bitstream of the video according to a format rule,
- wherein the format rule specifies whether values of one or more first syntax elements related to adaptive loop filters used for a chroma component included in an adaptation parameter set (APS) are constrained or not based on whether a second syntax element at a picture level or a slice level indicating an APS identifier that a luma component refers to is present or not and whether an index of color format is equal to 0 or not.
An apparatus for processing video data comprising a processor and a non-transitory memory with instructions thereon, wherein the instructions upon execution by the processor, cause the processor to:
- perform a conversion between a video and a bitstream of the video according to a format rule,
- wherein the format rule specifies whether values of one or more first syntax elements related to adaptive loop filters used for a chroma component included in an adaptation parameter set (APS) are constrained or not based on whether a second syntax element at a picture level or a slice level indicating an APS identifier that a luma component refers to is present or not and whether an index of color format is equal to 0 or not.
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 whether values of one or more first syntax elements related to adaptive loop filters used for a chroma component included in an adaptation parameter set (APS) are constrained or not based on whether a second syntax element at a picture level or a slice level indicating an APS identifier that a luma component refers to is present or not and whether an index of color format is equal to 0 or not.
A non-transitory computer-readable recording medium storing a bitstream of a video which is generated by a method performed by a video processing apparatus, wherein the method comprises:
- generating the bitstream for the video according to a format rule,
- wherein the format rule specifies whether values of one or more first syntax elements related to adaptive loop filters used for a chroma component included in an adaptation parameter set (APS) are constrained or not based on whether a second syntax element at a picture level or a slice level indicating an APS identifier that a luma component refers to is present or not and whether an index of color format is equal to 0 or not.
Dependencies are inferred from the claim text.