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1. WO2020112758 - ADAPTIVE MOST PROBABLE MODES FOR MULTIPLE REFERENCE LINE INTRA PREDICTION

Publication Number WO/2020/112758
Publication Date 04.06.2020
International Application No. PCT/US2019/063231
International Filing Date 26.11.2019
IPC
H04N 19/159 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
159Prediction type, e.g. intra-frame, inter-frame or bidirectional frame prediction
H04N 19/103 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
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 19/176
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 19/198
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
10using adaptive coding
189characterised by the adaptation method, adaptation tool or adaptation type used for the adaptive coding
196being specially adapted for the computation of encoding parameters, e.g. by averaging previously computed encoding parameters
198including smoothing of a sequence of encoding parameters, e.g. by averaging, by choice of the maximum, minimum or median value
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 19/96
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
96Tree coding, e.g. quad-tree coding
Applicants
  • TENCENT AMERICA LLC [US]/[US]
Inventors
  • XU, Xiaozhong
  • LIU, Shan
  • WANG, Yingbin
  • CHEN, Zhenzhong
Agents
  • RABENA, John F.
  • BIRD, John M.
  • EMERY, David P.
Priority Data
16/689,73920.11.2019US
62/773,14729.11.2018US
62/787,04031.12.2018US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) ADAPTIVE MOST PROBABLE MODES FOR MULTIPLE REFERENCE LINE INTRA PREDICTION
(FR) MODES LES PLUS PROBABLES ADAPTATIFS POUR UNE PRÉDICTION INTRA DE LIGNE DE RÉFÉRENCE MULTIPLE
Abstract
(EN)
A method of controlling intra prediction for decoding or encoding of a video sequence, is performed by at least one processor and includes identifying whether a first intra prediction mode of an above neighboring block of a prediction block is different than a second intra prediction mode of a left neighboring block of the prediction block. The method further includes, based on the first intra prediction mode being identified to be not different than the second intra prediction mode, obtaining a most probable mode (MPM) list including the first intra prediction mode, first immediate modes immediate to the first intra prediction mode and one among second immediate modes respectively immediate to the first immediate modes, and performing the intra prediction on multiple reference lines of the prediction block, using the obtained MPM list, the multiple reference lines being without a first reference line closest to the prediction block.
(FR)
L'invention concerne un procédé de commande de prédiction intra pour le décodage ou le codage d'une séquence vidéo qui est exécuté par au moins un processeur et consiste à identifier si un premier mode de prédiction intra d'un bloc voisin supérieur d'un bloc de prédiction est différent d'un second mode de prédiction intra d'un bloc voisin gauche du bloc de prédiction. Le procédé comprend en outre, sur la base du premier mode de prédiction intra qui est identifié comme n'étant pas différent du second mode de prédiction intra, les étapes consistant à obtenir une liste de modes les plus probables (MPM) comprenant le premier mode de prédiction intra, des premiers modes immédiats qui sont immédiats au premier mode de prédiction intra et un mode parmi des seconds modes immédiats respectivement immédiats aux premiers modes immédiats, et à effectuer la prédiction intra sur multiples lignes de référence du bloc de prédiction, à l'aide de la liste de MPM obtenue, les multiples lignes de référence étant dépourvues d'une première ligne de référence la plus proche du bloc de prédiction.
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