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1. WO2020116848 - IMAGE PREDICTION METHOD AND DEVICE FOR DERIVING CHROMA INTRA PREDICTION MODE

Publication Number WO/2020/116848
Publication Date 11.06.2020
International Application No. PCT/KR2019/016414
International Filing Date 27.11.2019
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 19/105 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
105Selection of the reference unit for prediction within a chosen coding or prediction mode, e.g. adaptive choice of position and number of pixels used for prediction
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
Applicants
  • 엘지전자 주식회사 LG ELECTRONICS INC. [KR]/[KR]
Inventors
  • 최장원 CHOI, Jangwon
  • 허진 HEO, Jin
  • 유선미 YOO, Sunmi
  • 이령 LI, Ling
  • 최정아 CHOI, Jungah
  • 김승환 KIM, Seunghwan
Agents
  • 인비전 특허법인 ENVISION PATENT & LAW FIRM
Priority Data
62/775,89905.12.2018US
62/787,73702.01.2019US
Publication Language Korean (KO)
Filing Language Korean (KO)
Designated States
Title
(EN) IMAGE PREDICTION METHOD AND DEVICE FOR DERIVING CHROMA INTRA PREDICTION MODE
(FR) PROCÉDÉ ET DISPOSITIF DE PRÉDICTION D'IMAGE POUR DÉRIVER UN MODE DE PRÉDICTION INTRA DE CHROMINANCE
(KO) 크로마 인트라 예측 모드를 도출하기 위한 영상 예측 방법 및 장치
Abstract
(EN)
An image decoding method according to the present document includes: a step for deriving a luma intra prediction mode; and a step for generating a chroma candidate mode list for a chroma block including a preset number of chroma intra candidates by using at least one among a DM, a planar mode, a DC mode, a vertical mode, a horizontal mode, and an up-right diagonal mode, which are derived from the luma intra prediction mode, wherein the DM is a prediction mode corresponding to a center (CR) position of the luma block, and the chroma intra candidates other than the DM can be derived through a duplicate check of the DM and a prediction mode corresponding to any one among the top left (TL), top right (TR), bottom left (BL), and bottom right (BR) of the luma block, the planar mode, the DC mode, the vertical mode, and the horizontal mode.
(FR)
La présente invention concerne un procédé de décodage d'image comprenant : une étape consistant à dériver un mode de prédiction intra de luminance ; et une étape consistant à générer une liste de modes candidats de chrominance pour un bloc de chrominance comprenant un nombre prédéfini de candidats intra de chrominance à l'aide d'au moins un DM parmi un DM, un mode plan, un mode CC, un mode vertical, un mode horizontal et un mode diagonal vers le haut, qui sont dérivés du mode de prédiction intra de luminance, le DM étant un mode de prédiction correspondant à une position centrale (CR) du bloc de luminance, et les candidats intra de chrominance autres que le DM peuvent être dérivés par l'intermédiaire d'une vérification en double du DM et d'un mode de prédiction correspondant à l'une quelconque parmi la partie supérieure gauche (TL), la partie supérieure droite (TR), la partie inférieure gauche (BL) et la partie intérieure droite (BR) du bloc de luminance, le mode plan, le mode CC, le mode vertical et le mode horizontal.
(KO)
본 문서에 따른 영상 디코딩 방법은 루마 인트라 예측 모드를 도출하는 단계와; 상기 루마 인트라 예측 모드로부터 도출된 DM, 플래너 모드, DC 모드, 수직 모드, 수평 모드 및 우샹향 대각 모드 중 적어도 하나를 이용하여 기설정된 개수의 크로마 인트라 후보를 포함하는 상기 크로마 블록에 대한 크로마 후보 모드 리스트를 생성하는 단계를 포함하고, 상기 DM은 상기 루마 블록의 CR(center) 위치에 대응하는 예측 모드이고, 상기 DM을 제외한 상기 크로마 인트라 후보는 상기 DM와, 상기 루마 블록의 TL(top left), TR(top bottom), BL(bottom left), BR(botton right) 중 어느 하나에 대응하는 예측 모드, 상기 플래너 모드, 상기 DC 모드, 상기 수직 모드, 상기 수평 모드의 중복 체크를 통하여 도출될 수 있다.
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