# US 11,310,517 B2 · Method and apparatus for encoding and decoding using selective information sharing between channels

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- Number: US 11,310,517 B2
- Document ID: US11310517B2
- Status: Granted
- Kind: B2
- Application number: 16/770,534
- Filed: 2018-12-07
- Published: 2021-05-06
- Granted: 2022-04-19
- Earliest claimed: 2017-12-07
- Assignees: Electronics and Telecommunications Research Institute; Research & Business Foundation Sungkyunkwan University
- Applicants: Electronics and Telecommunications Research Institute; Research and Business Foundation Sungkyunkwan University
- Inventors: Dong-San Jun; Jung-Won Kang; Hyunsuk Ko; Sung-Chang Lim; Jin-Ho Lee; Ha-Hyun Lee; Byeung-Woo Jeon; Hui-Yong Kim; Jee-Yoon Park
- Web page: https://patentgrep.com/patent/US11310517B2

## CPC

- H04N 19/103: Selection of coding mode or of prediction mode
- H04N 19/44: Decoders specially adapted therefor, e.g. video decoders which are asymmetric with respect to the encoder
- H04N 19/119: Adaptive subdivision aspects, e.g. subdivision of a picture into rectangular or non-rectangular coding blocks
- H04N 19/12: Selection from among a plurality of transforms or standards, e.g. selection between discrete cosine transform [DCT] and sub-band transform or selection between H.263 and H.264
- H04N 19/122: Selection of transform size, e.g. 8x8 or 2x4x8 DCT; Selection of sub-band transforms of varying structure or type
- H04N 19/186: the unit being a colour or a chrominance component
- H04N 19/593: involving spatial prediction techniques
- H04N 19/60: using transform coding
- H04N 19/70: characterised by syntax aspects related to video coding, e.g. related to compression standards
- H04N 19/82: involving filtering within a prediction loop
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION

## 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.

## Claims

### Claim 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
the coding information comprises an intra prediction direction used to perform intra predictions on the at least three blocks, respectively, wherein whether to perform the intra predictions on the at least three blocks using the coding information is determined based on a block size.

### Claim 2 (depends on 1)

The decoding method of claim 1, wherein sizes of the at least three blocks are the same.

### Claim 3 (depends on 1)

The decoding method of claim 1, wherein it is determined based on a flag acquired from a bitstream whether to perform the intra predictions on the at least three blocks using the coding information, respectively.

### Claim 4

An encoding method, comprising:
generating information for at least three blocks by performing encoding for the at least three blocks;
wherein the at least three blocks are encoded using coding information commonly applied to the at least three blocks, and
the coding information comprises an intra prediction direction used to perform intra predictions on the at least three blocks, respectively, wherein whether to perform the intra predictions on the at least three blocks using the coding information is determined based on a block size.

### Claim 5 (depends on 4)

A non-transitory computer-readable medium storing a bitstream generated by the encoding method of claim 4.

### Claim 6

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,
a determination is performed as to whether to perform the decoding on the at least three blocks using coding information shared for the at least three blocks,
the decoding on the at least three blocks using the coding information is performed based on the determination, and
the coding information comprises an intra prediction direction used to perform intra predictions on the at least three blocks, respectively, wherein whether to perform the intra predictions on the at least three blocks using the coding information is determined based on a block size.