Granted Patent B2

US 12,348,708 · App. 18/334,120 · Granted Jul 1, 2025

Inventors: Weijia Zhu (San Diego, CA); Li Zhang (San Diego, CA); Jizheng Xu (San Diego, CA); Kai Zhang (San Diego, CA); Hongbin Liu (Beijing, CN); Yue Wang (Beijing, CN)

Assignees: BEIJING BYTEDANCE NETWORK TECHNOLOGY CO., LTD.; BYTEDANCE INC.

H04N19/105H04N19/132H04N19/139H04N19/159H04N19/176H04N19/186

Abstract

Claims (52)

1. A method of processing video data, comprising:

constructing, for a first conversion between a first video block of a video and a bitstream of the video, a mode candidate list for the first video block based on prediction modes of at least one spatial neighboring video block,

deriving a first prediction mode for the first video block based on the mode candidate list;

performing the first conversion at least based on the first prediction mode,

wherein when the spatial neighboring video block is coded with a predetermined coding mode, the spatial neighboring video block is treated as having a first default intra mode to derive the mode candidate list,

wherein, in the predetermined coding mode, reconstructed samples of the spatial neighboring video block are represented by a set of representative color values, and the set of representative color values comprises at least one of 1) palette predictors, 2) escaped samples, or 3) palette information included in the bitstream,

wherein a first indication indicates whether to enable the predetermined coding mode for the spatial neighboring video block,

wherein in case that the spatial neighboring video block has a first size and a first color format, the first indication is conditionally included in the bitstream for the spatial neighboring video block when the spatial neighboring video block has a first tree type, and is not included in the bitstream for the spatial neighboring video block when the spatial neighboring video block has a second tree type different from the first tree type, and

wherein the first indication is not included in the bitstream for the spatial neighboring video block when the spatial neighboring video block has a size of 16.

2. The method of claim 1 , wherein the first default intra mode is a planar intra prediction mode.

3. The method of claim 1 , wherein the predetermined coding mode is not an intra coding mode.

4. The method of claim 1 , wherein a first flag indicating whether to use the predetermined coding mode for the spatial neighboring video block is omitted in the bitstream in response to a variable indicating a prediction mode of the spatial neighboring video block being not equal to MODE_INTRA.

5. The method of claim 1 , wherein the first indication is included in the bitstream when a second indication indicating that the predetermined coding mode is enabled is included in the bitstream.

6. The method of claim 1 , wherein the at least one spatial neighboring video block is above or left neighboring block of the first video block.

7. The method of claim 1 , wherein the first conversion includes encoding the first video block into the bitstream.

8. The method of claim 1 , wherein the first conversion includes decoding the first video block from the bitstream.

9. 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:

construct, for a first conversion between a first video block of a video and a bitstream of the video, a mode candidate list for the first video block based on prediction modes of at least one spatial neighboring video block,

derive a first prediction mode for the first video block based on the mode candidate list;

perform the first conversion at least based on the first prediction mode,

wherein when the spatial neighboring video block is coded with a predetermined coding mode, the spatial neighboring video block is treated as having a first default intra mode to derive the mode candidate list,

wherein, in the predetermined coding mode, reconstructed samples of the spatial neighboring video block are represented by a set of representative color values, and the set of representative color values comprises at least one of 1) palette predictors, 2) escaped samples, or 3) palette information included in the bitstream,

wherein a first indication indicates whether to enable the predetermined coding mode for the spatial neighboring video block,

wherein in case that the spatial neighboring video block has a first size and a first color format, the first indication is conditionally included in the bitstream for the spatial neighboring video block when the spatial neighboring video block has a first tree type, and is not included in the bitstream for the spatial neighboring video block when the spatial neighboring video block has a second tree type different from the first tree type, and

wherein the first indication is not included in the bitstream for the spatial neighboring video block when the spatial neighboring video block has a size of 16.

10. The apparatus of claim 9 , wherein the first default intra mode is a planar mode.

11. The apparatus of claim 9 , wherein the predetermined coding mode is not an intra coding mode.

12. The apparatus of claim 9 , wherein a first flag indicating whether to use the predetermined coding mode for the spatial neighboring video block is omitted in the bitstream in response to a variable indicating a prediction mode of the spatial neighboring video block being not equal to MODE_INTRA.

13. A non-transitory computer-readable storage medium storing instructions that cause a processor to:

construct, for a first conversion between a first video block of a video and a bitstream of the video, a mode candidate list for the first video block based on prediction modes of at least one spatial neighboring video block,

derive a first prediction mode for the first video block based on the mode candidate list;

perform the first conversion at least based on the first prediction mode,

wherein when the spatial neighboring video block is coded with a predetermined coding mode, the spatial neighboring video block is treated as having a first default intra mode to derive the mode candidate list,

wherein, in the predetermined coding mode, reconstructed samples of the spatial neighboring video block are represented by a set of representative color values, and the set of representative color values comprises at least one of 1) palette predictors, 2) escaped samples, or 3) palette information included in the bitstream,

wherein a first indication indicates whether to enable the predetermined coding mode for the spatial neighboring video block,

wherein in case that the spatial neighboring video block has a first size and a first color format, the first indication is conditionally included in the bitstream for the spatial neighboring video block when the spatial neighboring video block has a first tree type, and is not included in the bitstream for the spatial neighboring video block when the spatial neighboring video block has a second tree type different from the first tree type, and

wherein the first indication is not included in the bitstream for the spatial neighboring video block when the spatial neighboring video block has a size of 16.

14. The non-transitory computer-readable storage medium of claim 13 , wherein the first default intra mode is a planar intra prediction mode.

15. The non-transitory computer-readable storage medium of claim 13 , wherein the predetermined coding mode is not an intra coding mode.

16. The non-transitory computer-readable storage medium of claim 13 , wherein a first flag indicating whether to use the predetermined coding mode for the spatial neighboring video block is omitted in the bitstream in response to a variable indicating a prediction mode of the spatial neighboring video block being not equal to MODE_INTRA.

17. A non-transitory computer-readable recording medium storing a bitstream which is generated by a method performed by a video processing apparatus, wherein the method comprises:

constructing, for a first video block of a video, a mode candidate list for the first video block based on prediction modes of at least one spatial neighboring video block,

deriving a first prediction mode for the first video block based on the mode candidate list;

generating the bitstream from the first video block at least based on the first prediction mode,

wherein when the spatial neighboring video block is coded with a predetermined coding mode, the spatial neighboring video block is treated as having a first default intra mode to derive the mode candidate list,

wherein, in the predetermined coding mode, reconstructed samples of the spatial neighboring video block are represented by a set of representative color values, and the set of representative color values comprises at least one of 1) palette predictors, 2) escaped samples, or 3) palette information included in the bitstream,

wherein a first indication indicates whether to enable the predetermined coding mode for the spatial neighboring video block,

wherein in case that the spatial neighboring video block has a first size and a first color format, the first indication is conditionally included in the bitstream for the spatial neighboring video block when the spatial neighboring video block has a first tree type, and is not included in the bitstream for the spatial neighboring video block when the spatial neighboring video block has a second tree type different from the first tree type, and

wherein the first indication is not included in the bitstream for the spatial neighboring video block when the spatial neighboring video block has a size of 16.

18. The non-transitory computer-readable recording medium of claim 17 , wherein the first default intra mode is a planar intra prediction mode.

19. The non-transitory computer-readable recording medium of claim 17 , wherein the predetermined coding mode is not an intra coding mode.

20. The non-transitory computer-readable recording medium of claim 17 , wherein a first flag indicating whether to use the predetermined coding mode for the spatial neighboring video block is omitted in the bitstream in response to a variable indicating a prediction mode of the spatial neighboring video block being not equal to MODE_INTRA.

Assignments (2)

Priority Claims (1)

Continuity (3)

References Cited (320)