Method and apparatus for encoding and decoding using selective information sharing between channels

Patent metadata

Field	Value
Publication number	US-11902553-B2
Application number	US-202217695648-A
Country	US
Kind code	B2
Filing date	Mar 15, 2022
Priority date	Dec 7, 2017
Publication date	Feb 13, 2024
Grant date	Feb 13, 2024

Abstract

Disclosed herein are a video decoding method and apparatus and a video encoding method and apparatus. Coding decision information of a representative channel of a target block is shared as coding decision information of a target channel of the target block, and decoding of the target block is performed using the coding decision information of the target channel. Since the coding decision information of the representative channel is shared with an additional channel, repeated signaling of identical coding decision information may be prevented. By means of this prevention, the efficiency of encoding and decoding of the target block or the like may be improved.

First claim

The invention claimed is:

1. A decoding method, comprising:
performing a determination as to whether to perform decoding on at least three blocks using coding information shared for the at least three blocks; and
performing the decoding on the at least three blocks using the coding information based on the determination,
wherein a Multiple Transform Selection (MTS) for a block is performed based on the determination.

2. The decoding method of claim 1 ,
wherein a transform for a vertical direction and a transform for a horizontal direction for a block is performed based on the determination.

3. The decoding method of claim 1 ,
wherein the decoding comprises transformations for the at least three blocks.

4. The decoding method of claim 1 ,
wherein the decoding comprises a Cross Component Liner Model (CCLM) processing for the at least three blocks.

5. The decoding method of claim 1 ,
wherein the decoding comprises a Multiple Transform Selection (MTS) for the at least three blocks.

6. The decoding method of claim 5 ,
wherein a type of a transformation for the at least three blocks is selected based on the determination.

7. An encoding method, comprising:
generating information for at least three blocks by performing encoding for the at least three blocks,
wherein a determination as to whether to perform encoding on the at least three blocks using coding information commonly applied to the at least three blocks is performed, and
wherein a Multiple Transform Selection (MTS) for a block is performed based on the determination.

8. The encoding method of claim 7 ,
wherein a transform for a vertical direction and a transform for a horizontal direction for a block is performed based on the determination.

9. The encoding method of claim 7 ,
wherein the encoding comprises a Cross Component Liner Model (CCLM) processing for the at least three blocks.

10. A non-transitory computer-readable medium storing a bitstream, the bitstream comprising:
information for at least three blocks,
wherein decoding for the at least three blocks is performed using the information for the at least three blocks,
wherein a determination as to whether to perform the decoding on the at least three blocks using coding information shared for the at least three blocks is performed,
wherein the decoding on the at least three blocks using the coding information is performed based on the determination, and
wherein a Multiple Transform Selection (MTS) for a block is performed based on the determination.

11. The non-transitory computer-readable medium of claim 10 ,
wherein a transform for a vertical direction and a transform for a horizontal direction for a block is performed based on the determination.

12. The non-transitory computer-readable medium of claim 10 ,
wherein the decoding comprises a Cross Component Liner Model (CCLM) processing for the at least three blocks.

13. The non-transitory computer-readable medium of claim 10 ,
wherein filterings for prediction blocks of the at least three blocks are performed based on the determination.

Assignees

• Electronics & Telecommunications Res Inst
• Research And Business Foundation Sungkyunkwan Univ

Inventors

• Jun Dong-San
• Kang Jung-Won
• KO Hyunsuk
• Lim Sung-Chang
• Lee Jin-Ho
• Lee Ha-Hyun
• Jeon Byeung-Woo
• Kim Hui-Yong
• Park Jee-Yoon

Classifications

• H04N19/44 Primary

  Decoders specially adapted therefor, e.g. video decoders which are asymmetric with respect to the encoder · CPC title

• H04N19/119

  Adaptive subdivision aspects, e.g. subdivision of a picture into rectangular or non-rectangular coding blocks · CPC title

• H04N19/122

  Selection of transform size, e.g. 8x8 or 2x4x8 DCT; Selection of sub-band transforms of varying structure or type · CPC title

• H04N19/186

  the unit being a colour or a chrominance component · CPC title

• H04N19/593 Primary

  involving spatial prediction techniques · CPC title