IP Library › Granted Patent US 12,256,107
Granted Patent B2
US 12,256,107 · App. 18/516,493 · Granted Mar 18, 2025

Use of header syntax elements and adaptation parameter set

Inventors: Zhipin Deng (Beijing, CN); Li Zhang (San Diego, CA); Ye-kui Wang (San Diego, CA); Kai Zhang (San Diego, CA); Jizheng Xu (San Diego, CA)
Assignees: BEIJING BYTEDANCE NETWORK TECHNOLOGY CO., LTD.; BYTEDANCE INC.
H04N19/70H04N19/117H04N19/186H04N19/188
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Quick Facts
Patent No.
US 12,256,107
App. No.
18/516,493
Granted
Mar 18, 2025
Kind
B2
Abstract

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 constraints on values of one or more first syntax elements in an adaptation parameter set are defined based on semantics of second syntax elements in a picture header and/or a slice header when a picture or a slice refers to the adaptation parameter set.

Claims (58)

1. 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 that a first syntax element specifying whether one or more chroma-related adaptation parameter set (APS) syntax elements are present in an APS syntax structure is included in the APS syntax structure,

wherein the first syntax element equal to 1 specifies that an APS network abstraction layer (NAL) unit is allowed to include the one or more chroma-related APS syntax elements and the first syntax element equal to 0 specifies that the APS NAL unit does not include the one or more chroma-related APS syntax elements,

wherein the APS NAL unit has an APS parameters type equal to a scaling list APS type, luma mapping with chroma scaling (LMCS) APS type, or adaptive loop filtering (ALF) APS type, and the one or more chroma-related APS syntax elements include scaling list chroma-related data syntax elements, LMCS chroma-related data syntax elements, or ALF chroma-related data syntax elements, and

wherein when i) the APS NAL unit has the APS parameters type equal to the scaling list APS type, ii) the first syntax element is equal to 0, iii) a variable identifier (id) is not equal to X and id % M is not equal to N, the scaling list chroma-related data syntax elements are excluded from the APS syntax structure, whereby X, M and N are integers,

wherein a value of the first syntax element is constrained depending on a chroma format index and the APS parameters type, and

wherein as for the APS NAL unit with the LMCS APS type or the ALF APS type, when the chroma format index is equal to 0, the value of the first syntax element in the APS NAL unit with the LMCS APS type or the ALF APS type is equal to 0; and

wherein as for the APS NAL unit with the scaling list APS type, when the chroma format index is equal to 0, the value of the first syntax element in the APS NAL unit with the scaling list APS type is equal to 0, and when the chroma format index is not equal to 0, the value of the first syntax element in the APS NAL unit with the scaling list APS type is equal to 1.

2. The method of claim 1 , wherein constraints on value of the first syntax element in different APS parameters types are different, wherein a one-way constraint of the first syntax element in the APS NAL unit with the LMCS APS type or the ALF APS type is applied and two-way constraints of the first syntax element in the APS NAL unit with the scaling list APS type are applied.

3. The method of claim 2 , wherein the one-way constraint specifies when a first certain condition is true, a first constraint of the first syntax element is applied, the two-way constraints specify when the first certain condition is true, the first constraint of the first syntax element is applied, otherwise a second constraint of the first syntax element is applied.

4. The method of claim 3 , wherein the one-way constraint or the two-way constraints of the first syntax element are based on the chroma format index.

5. The method of claim 1 , wherein X=27.

6. The method of claim 1 , wherein M=3, N=2.

7. The method of claim 1 , wherein when the APS NAL unit has the APS parameters type equal to the ALF APS type and the first syntax element is equal to 0, the ALF chroma-related data syntax elements are excluded from the APS syntax structure.

8. The method of claim 1 , wherein when the APS NAL unit has the APS parameters type equal to the LMCS APS type and the first syntax element is equal to 0, the LMCS chroma-related data syntax elements are excluded from the APS syntax structure.

9. The method of claim 1 , wherein the conversion includes encoding the video into the bitstream.

10. The method of claim 1 , wherein the conversion includes decoding the video from the bitstream.

11. 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 that a first syntax element specifying whether one or more chroma-related adaptation parameter set (APS) syntax elements are present in an APS syntax structure is included in the APS syntax structure,

wherein the first syntax element equal to 1 specifies that an APS network abstraction layer (NAL) unit is allowed to include the one or more chroma-related APS syntax elements and the first syntax element equal to 0 specifies that the APS NAL unit does not include the one or more chroma-related APS syntax elements,

wherein the APS NAL unit has an APS parameters type equal to a scaling list APS type, luma mapping with chroma scaling (LMCS) APS type, or adaptive loop filtering (ALF) APS type, and the one or more chroma-related APS syntax elements include scaling list chroma-related data syntax elements, LMCS chroma-related data syntax elements, or ALF chroma-related data syntax elements, and

wherein when i) the APS NAL unit has the APS parameters type equal to the scaling list APS type, ii) the first syntax element is equal to 0, iii) a variable identifier (id) is not equal to X and id % M is not equal to N, the scaling list chroma-related data syntax elements are excluded from the APS syntax structure, whereby X, M and N are integers,

wherein a value of the first syntax element is constrained depending on a chroma format index and the APS parameters type, and

wherein as for the APS NAL unit with the LMCS APS type or the ALF APS type, when the chroma format index is equal to 0, the value of the first syntax element in the APS NAL unit with the LMCS APS type or the ALF APS type is equal to 0; and

wherein as for the APS NAL unit with the scaling list APS type, when the chroma format index is equal to 0, the value of the first syntax element in the APS NAL unit with the scaling list APS type is equal to 0, and when the chroma format index is not equal to 0, the value of the first syntax element in the APS NAL unit with the scaling list APS type is equal to 1.

12. The apparatus of claim 11 , wherein constraints on value of the first syntax element in different APS parameters types are different, wherein a one-way constraint of the first syntax element in the APS NAL unit with the LMCS APS type or the ALF APS type is applied and two-way constraints of the first syntax element in the APS NAL unit with the scaling list APS type are applied.

13. The apparatus of claim 12 , wherein the one-way constraint specifies when a first certain condition is true, a first constraint of the first syntax element is applied; the two-way constraints specify when the first certain condition is true, the first constraint of the first syntax element is applied, otherwise a second constraint of the first syntax element is applied, and wherein the one-way constraint or the two-way constraints of the first syntax element are based on the chroma format index.

14. The apparatus of claim 11 , wherein when the APS NAL unit has the APS parameters type equal to the ALF APS type and the first syntax element is equal to 0, the ALF chroma-related data syntax elements are excluded from the APS syntax structure;

wherein X=27, M=3, and N=2.

15. The apparatus of claim 11 , wherein when the APS NAL unit has the APS parameters type equal to the LMCS APS type and the first syntax element is equal to 0, the LMCS chroma-related data syntax elements are excluded from the APS syntax structure.

16. 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 that a first syntax element specifying whether one or more chroma-related adaptation parameter set (APS) syntax elements are present in an APS syntax structure is included in the APS syntax structure,

wherein the first syntax element equal to 1 specifies that an APS network abstraction layer (NAL) unit is allowed to include the one or more chroma-related APS syntax elements and the first syntax element equal to 0 specifies that the APS NAL unit does not include the one or more chroma-related APS syntax elements,

wherein the APS NAL unit has an APS parameters type equal to a scaling list APS type, luma mapping with chroma scaling (LMCS) APS type, or adaptive loop filtering (ALF) APS type, and the one or more chroma-related APS syntax elements include scaling list chroma-related data syntax elements, LMCS chroma-related data syntax elements, or ALF chroma-related data syntax elements, and

wherein when i) the APS NAL unit has the APS parameters type equal to the scaling list APS type, ii) the first syntax element is equal to 0, iii) a variable identifier (id) is not equal to X and id % M is not equal to N, the scaling list chroma-related data syntax elements are excluded from the APS syntax structure, whereby X, M and N are integers,

wherein a value of the first syntax element is constrained depending on a chroma format index and the APS parameters type, and

wherein as for the APS NAL unit with the LMCS APS type or the ALF APS type, when the chroma format index is equal to 0, the value of the first syntax element in the APS NAL unit with the LMCS APS type or the ALF APS type is equal to 0; and

wherein as for the APS NAL unit with the scaling list APS type, when the chroma format index is equal to 0, the value of the first syntax element in the APS NAL unit with the scaling list APS type is equal to 0, and when the chroma format index is not equal to 0, the value of the first syntax element in the APS NAL unit with the scaling list APS type is equal to 1.

17. The non-transitory computer-readable storage medium of claim 16 , wherein constraints on value of the first syntax element in different APS parameters types are different, wherein a one-way constraint of the first syntax element in the APS NAL unit with the LMCS APS type or the ALF APS type is applied and two-way constraints of the first syntax element in the APS NAL unit with the scaling list APS type are applied.

18. The non-transitory computer-readable storage medium of claim 17 , wherein the one-way constraint specifies when a first certain condition is true, a first constraint of the first syntax element is applied; the two-way constraints specify when the first certain condition is true, the first constraint of the first syntax element is applied, otherwise a second constraint of the first syntax element is applied,

wherein the one-way constraint or the two-way constraints of the first syntax element are based on the chroma format index, and

wherein X=27, M=3, and N=2.

19. A method for storing a bitstream of a video, wherein the method comprises:

generating the bitstream of the video according to a format rule, and

storing the bitstream in a non-transitory computer-readable recording medium,

wherein the format rule specifies that a first syntax element specifying whether one or more chroma-related adaptation parameter set (APS) syntax elements are present in an APS syntax structure is included in the APS syntax structure,

wherein the first syntax element equal to 1 specifies that an APS network abstraction layer (NAL) unit is allowed to include the one or more chroma-related APS syntax elements and the first syntax element equal to 0 specifies that the APS NAL unit does not include the one or more chroma-related APS syntax elements,

wherein the APS NAL unit has an APS parameters type equal to a scaling list APS type, luma mapping with chroma scaling (LMCS) APS type, or adaptive loop filtering (ALF) APS type, and the one or more chroma-related APS syntax elements include scaling list chroma-related data syntax elements, LMCS chroma-related data syntax elements, or ALF chroma-related data syntax elements, and

wherein when i) the APS NAL unit has the APS parameters type equal to the scaling list APS type, ii) the first syntax element is equal to 0, iii) a variable identifier (id) is not equal to X and id % M is not equal to N, the scaling list chroma-related data syntax elements are excluded from the APS syntax structure, whereby X, M and N are integers,

wherein a value of the first syntax element is constrained depending on a chroma format index and the APS parameters type, and

wherein as for the APS NAL unit with the LMCS APS type or the ALF APS type, when the chroma format index is equal to 0, the value of the first syntax element in the APS NAL unit with the LMCS APS type or the ALF APS type is equal to 0; and

wherein as for the APS NAL unit with the scaling list APS type, when the chroma format index is equal to 0, the value of the first syntax element in the APS NAL unit with the scaling list APS type is equal to 0, and when the chroma format index is not equal to 0, the value of the first syntax element in the APS NAL unit with the scaling list APS type is equal to 1.

20. The method of claim 19 , wherein constraints on value of the first syntax element in different APS parameters types are different, wherein a one-way constraint of the first syntax element in the APS NAL unit with the LMCS APS type or the ALF APS type is applied and two-way constraints of the first syntax element in the APS NAL unit with the LMCS APS type or the ALF APS type scaling list APS type are applied,

wherein the one-way constraint specifies when a first certain condition is true, a first constraint of the first syntax element is applied; the two-way constraints specify when the first certain condition is true, the first constraint of the first syntax element is applied, otherwise a second constraint of the first syntax element is applied, and

wherein the one-way constraint or the two-way constraints of the first syntax element are based on the chroma format index.

Assignments (3)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 10, 2024
From: ZHANG, LI; WANG, YE-KUI; ZHANG, KAI; XU, JIZHENG
To: BYTEDANCE INC.
Reel/Frame 066085/0189 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 10, 2024
From: DENG, ZHIPIN
To: BEIJING ZITIAO NETWORK TECHNOLOGY CO., LTD.
Reel/Frame 066085/0279 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 10, 2024
From: BEIJING ZITIAO NETWORK TECHNOLOGY CO., LTD.
To: BEIJING BYTEDANCE NETWORK TECHNOLOGY CO., LTD.
Reel/Frame 066085/0401 →
Priority Claims (1)
WO PCT/CN2020/084295 · Apr 10, 2020 · international
Continuity (3)
Continuation 17962852 · Oct 10, 2022
Continuation PCTCN2021086178 · Apr 9, 2021
Related Publication 20240098308A1 · Mar 21, 2024
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