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1. WO2020141813 - IMAGE ENCODING/DECODING METHOD AND APPARATUS, AND RECORDING MEDIUM STORING BITSTREAM

Publication Number WO/2020/141813
Publication Date 09.07.2020
International Application No. PCT/KR2019/018597
International Filing Date 27.12.2019
IPC
H04N 19/11 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
103Selection of coding mode or of prediction mode
11among a plurality of spatial predictive coding modes
H04N 19/593 2014.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
50using predictive coding
593involving spatial prediction techniques
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
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 19/176 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
17the unit being an image region, e.g. an object
176the region being a block, e.g. a macroblock
CPC
H04N 19/11
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
103Selection of coding mode or of prediction mode
11among a plurality of spatial predictive coding modes
H04N 19/176
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
17the unit being an image region, e.g. an object
176the region being a block, e.g. a macroblock
H04N 19/184
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
H04N 19/186
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 19/593
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
50using predictive coding
593involving spatial prediction techniques
H04N 19/70
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
Applicants
  • 한국전자통신연구원 ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE [KR]/[KR]
  • 세종대학교 산학협력단 INDUSTRY ACADEMY COOPERATION FOUNDATION OF SEJONG UNIVERSITY [KR]/[KR]
  • 한국항공대학교산학협력단 INDUSTRY-UNIVERSITY COOPERATION FOUNDATION KOREA AEROSPACE UNIVERSITY [KR]/[KR]
Inventors
  • 임성창 LIM, Sung Chang
  • 강정원 KANG, Jung Won
  • 이하현 LEE, Ha Hyun
  • 이진호 LEE, Jin Ho
  • 김휘용 KIM, Hui Yong
  • 이영렬 LEE, Yung Lyul
  • 김명준 KIM, Myung Jun
  • 김남욱 KIM, Nam Uk
  • 김양우 KIM, Yang Woo
  • 정지연 JUNG, Ji Yeon
  • 김재곤 KIM, Jae Gon
Agents
  • 성병기 SUNG, Byung Kee
Priority Data
10-2018-017419031.12.2018KR
10-2019-004737323.04.2019KR
Publication Language Korean (KO)
Filing Language Korean (KO)
Designated States
Title
(EN) IMAGE ENCODING/DECODING METHOD AND APPARATUS, AND RECORDING MEDIUM STORING BITSTREAM
(FR) PROCÉDÉ ET APPAREIL DE CODAGE/DÉCODAGE D'IMAGES ET SUPPORT D'ENREGISTREMENT MÉMORISANT UN FLUX BINAIRE
(KO) 영상 부호화/복호화 방법, 장치 및 비트스트림을 저장한 기록 매체
Abstract
(EN)
An image encoding/decoding method and apparatus are provided. An image decoding method according to the present invention may comprise the steps of: reconstructing an intra-prediction mode of a current chrominance block; when the intra-prediction mode is a cross-component linear model (CCLM) mode, deriving at least one representative value on the basis of a neighboring sample of the current chrominance block and a neighboring sample of a corresponding luminance block corresponding to the current chrominance block; deriving a parameter of a CCLM by using the at least one representative value; and generating a prediction block of the current chrominance block by using the parameter of the CCLM.
(FR)
L'invention concerne un procédé et un appareil de codage/décodage d'images. Un procédé de décodage d'image selon la présente invention peut comprendre les étapes consistant à : reconstruire un mode d'intra-prédiction d'un bloc de chrominance courant ; lorsque le mode d'intra-prédiction est un modèle linéaire à composante transversale (CCLM), dériver au moins une valeur représentative sur la base d'un échantillon voisin du bloc de chrominance courant et d'un échantillon voisin d'un bloc de luminance correspondant correspondant au bloc de chrominance courant ; dériver un paramètre d'un CCLM à l'aide de la ou des valeurs représentatives ; et générer un bloc de prédiction du bloc de chrominance courant au moyen du paramètre du CCLM.
(KO)
영상 부호화/복호화 방법 및 장치가 제공된다. 본 발명에 따른 영상 복호화 방법은, 현재 색차 블록의 화면 내 예측 모드를 복원하는 단계, 상기 화면 내 예측 모드가 CCLM(Cross-Component Linear Model) 모드인 경우, 상기 현재 색차 블록의 주변 샘플 및 상기 현재 색차 블록에 대응하는 대응 휘도 블록의 주변 샘플에 기초하여 적어도 하나의 대표값을 유도하는 단계, 상기 적어도 하나의 대표값을 이용하여 CCLM의 파라미터를 유도하는 단계 및 상기 CCLM의 파라미터를 이용하여 상기 현재 색차 블록의 예측 블록을 생성하는 단계를 포함할 수 있다.
Also published as
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