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1. WO2018062702 - INTRA PREDICTION METHOD AND APPARATUS IN IMAGE CODING SYSTEM

Publication Number WO/2018/062702
Publication Date 05.04.2018
International Application No. PCT/KR2017/009540
International Filing Date 31.08.2017
IPC
H04N 19/593 2014.1
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 2014.1
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 19/176 2014.1
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 19/105
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 19/11
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 19/159
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
159Prediction type, e.g. intra-frame, inter-frame or bidirectional frame prediction
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 19/593
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 19/91
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
90using coding techniques not provided for in groups H04N19/10-H04N19/85, e.g. fractals
91Entropy coding, e.g. variable length coding [VLC] or arithmetic coding
Applicants
  • 엘지전자 주식회사 LG ELECTRONICS INC. [KR]/[KR]
Inventors
  • 허진 HEO, Jin
  • 장형문 JANG, Hyeongmoon
Agents
  • 인비전 특허법인 ENVISION PATENT & LAW FIRM
Priority Data
62/401,89730.09.2016US
Publication Language Korean (ko)
Filing Language Korean (KO)
Designated States
Title
(EN) INTRA PREDICTION METHOD AND APPARATUS IN IMAGE CODING SYSTEM
(FR) PROCÉDÉ ET APPAREIL DE PRÉDICTION INTRA DANS UN SYSTÈME DE CODAGE D'IMAGES
(KO) 영상 코딩 시스템에서 인트라 예측 방법 및 장치
Abstract
(EN) The intra prediction method according to the present invention comprises the steps of: deriving an intra prediction mode of a current block; deriving neighboring reference samples of the current block; and generating a prediction sample of the current block on the basis of linear interpolation of a first neighboring reference sample positioned in the prediction direction of the intra prediction mode, and a second neighboring reference sample positioned in the opposite direction of the prediction direction, among the neighboring reference samples of the current block, wherein the neighboring reference samples include left neighboring reference samples, left upper neighboring reference samples, upper neighboring reference samples, right neighboring reference samples, right lower neighboring reference samples, and lower neighboring reference samples of the current block. The present invention can improve intra prediction performance, and thereby reduce the amount of data required for residual information and increase the overall coding efficiency.
(FR) La présente invention concerne un procédé de prédiction intra comprenant les étapes consistant : à dériver un mode de prédiction intra d'un bloc actuel; à dériver des échantillons de référence voisins du bloc actuel; et à générer un échantillon de prédiction du bloc actuel, en fonction d'une interpolation linéaire d'un premier échantillon de référence voisin, positionné dans la direction de la prédiction du mode de prédiction intra et d'un deuxième échantillon de référence voisin, positionné dans la direction opposée à la direction de prédiction, parmi les échantillons de référence voisins du bloc actuel, les échantillons de référence voisins comprenant des échantillons de référence voisins gauches, des échantillons de référence voisins gauches supérieurs, des échantillons de référence voisins supérieurs, des échantillons de référence voisins droits, des échantillons de référence voisins droits inférieurs et des échantillons de référence voisins inférieurs du bloc actuel. La présente invention permet d'améliorer les performances de la prédiction intra et de réduire ainsi la quantité de données requises pour des informations résiduelles et d'augmenter l'efficacité de codage globale.
(KO) 본 발명에 따른 인트라 예측 방법은 현재 블록의 인트라 예측 모드를 도출하는 단계, 상기 현재 블록의 주변 참조 샘플들을 도출하는 단계, 및 상기 현재 블록의 주변 참조 샘플들 중 상기 인트라 예측 모드의 예측 방향에 위치하는 제1 주변 참조 샘플 및 상기 예측 방향의 반대 방향에 위치하는 제2 주변 참조 샘플의 선형 보간을 기반으로 상기 현재 블록의 예측 샘플을 생성하는 단계를 포함하되, 상기 주변 참조 샘플들은 상기 현재 블록의 좌측 주변 참조 샘플들, 좌상측 주변 참조 샘플들, 상측 주변 참조 샘플들, 우측 주변 참조 샘플들, 우하측 주변 참조 샘플들, 및 하측 주변 참조 샘플들을 포함함을 특징으로 한다. 본 발명에 따르면 인트라 예측 성능을 높여 레지듀얼 정보에 필요한 데이터량을 줄일 수 있고, 전반적인 코딩 효율을 높일 수 있다.
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