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1. WO2021060844 - IMAGE ENCODING/DECODING METHOD AND DEVICE USING PALETTE MODE, AND METHOD FOR TRANSMITTING BITSTREAM

Publication Number WO/2021/060844
Publication Date 01.04.2021
International Application No. PCT/KR2020/012898
International Filing Date 23.09.2020
IPC
H04N 19/157 2014.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
10using adaptive coding
134characterised by the element, parameter or criterion affecting or controlling the adaptive coding
157Assigned coding mode, i.e. the coding mode being predefined or preselected to be further used for selection of another element or parameter
H04N 19/70 2014.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
70characterised by syntax aspects related to video coding, e.g. related to compression standards
H04N 19/119 2014.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
10using adaptive coding
102characterised by the element, parameter or selection affected or controlled by the adaptive coding
119Adaptive subdivision aspects e.g. subdivision of a picture into rectangular or non-rectangular coding blocks
H04N 19/186 2014.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
10using adaptive coding
169characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
186the unit being a colour or a chrominance component
H04N 19/184 2014.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
10using adaptive coding
169characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
184the unit being bits, e.g. of the compressed video stream
Applicants
  • 엘지전자 주식회사 LG ELECTRONICS INC. [KR]/[KR]
Inventors
  • 장형문 JANG, Hyeong Moon
  • 유선미 YOO, Sunmi
  • 남정학 NAM, Jung Hak
Agents
  • 성병기 SUNG, Byung Kee
Priority Data
62/904,57823.09.2019US
Publication Language Korean (KO)
Filing Language Korean (KO)
Designated States
Title
(EN) IMAGE ENCODING/DECODING METHOD AND DEVICE USING PALETTE MODE, AND METHOD FOR TRANSMITTING BITSTREAM
(FR) PROCÉDÉ ET DISPOSITIF DE CODAGE/DÉCODAGE D'IMAGE UTILISANT UN MODE PALETTE, ET PROCÉDÉ DE TRANSMISSION DE TRAIN DE BITS
(KO) 팔레트 모드를 이용한 영상 부호화/복호화 방법, 장치 및 비트스트림을 전송하는 방법
Abstract
(EN)
Provided are an image encoding/decoding method and device. An image decoding method according to the present disclosure includes the steps of: acquiring palette information and palette index prediction information about the current block from a bitstream, when a palette mode is applied to the current block; forming a palette predictor for the current block on the basis of the palette information, and forming a palette table for the current block on the basis of the palette predictor; generating a palette index map for the current block on the basis of the palette index prediction information; and decoding the current block on the basis of the palette table and the palette index map, wherein the palette predictor may be selectively updated on the basis of a division structure of the current block.
(FR)
L'invention concerne un procédé et un dispositif de codage/décodage d'image. Un procédé de décodage d'image selon la présente divulgation comprend les étapes consistant à : acquérir des informations de palette et des informations de prédiction d'indice de palette concernant le bloc actuel à partir d'un train de bits, lorsqu'un mode palette est appliqué au bloc actuel ; former un prédicteur de palette pour le bloc actuel sur la base des informations de palette, et former une table de palette pour le bloc actuel sur la base du prédicteur de palette ; générer une carte d'indice de palette pour le bloc actuel sur la base des informations de prédiction d'indice de palette ; et décoder le bloc actuel sur la base de la table de palette et de la carte d'indice de palette, le prédicteur de palette pouvant être mis à jour sélectivement sur la base d'une structure de division du bloc actuel.
(KO)
영상 부호화/복호화 방법 및 장치가 제공된다. 본 개시에 따른 영상 복호화 방법은 현재 블록에 팔레트 모드가 적용되는 경우, 비트스트림으로부터 상기 현재 블록에 대한 팔레트 정보 및 팔레트 인덱스 예측 정보를 획득하는 단계, 상기 팔레트 정보에 기반하여 상기 현재 블록에 대한 팔레트 예측자를 구성하고, 상기 팔레트 예측자에 기반하여 상기 현재 블록에 대한 팔레트 테이블을 구성하는 단계, 상기 팔레트 인덱스 예측 정보에 기반하여, 상기 현재 블록에 대한 팔레트 인덱스 맵을 생성하는 단계, 및 상기 팔레트 테이블 및 상기 팔레트 인덱스 맵에 기반하여, 상기 현재 블록을 복호화하는 단계를 포함하고, 상기 팔레트 예측자는 상기 현재 블록의 분할 구조에 기반하여 선택적으로 업데이트될 수 있다.
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