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1. WO2020139173 - METHOD AND APPARATUS FOR INTRA PREDICTION

Publication Number WO/2020/139173
Publication Date 02.07.2020
International Application No. PCT/RU2019/050262
International Filing Date 30.12.2019
IPC
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
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 19/136
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
136Incoming video signal characteristics or properties
H04N 19/147
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
146Data rate or code amount at the encoder output
147according to rate distortion criteria
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
Applicants
  • HUAWEI TECHNOLOGIES CO., LTD. [CN]/[CN]
  • FILIPPOV, Alexey Konstantinovich [RU]/[CN] (RU)
Inventors
  • FILIPPOV, Alexey Konstantinovich
  • RUFITSKIY, Vasily Alexeevich
  • CHEN, Jianle
Agents
  • LAW FIRM "GORODISSKY & PARTNERS" LTD.
Priority Data
62/786,34929.12.2018US
62/821,42220.03.2019US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) METHOD AND APPARATUS FOR INTRA PREDICTION
(FR) PROCÉDÉ ET APPAREIL DE PRÉDICTION INTRA
Abstract
(EN)
Apparatuses and methods for intra predicting a block are provided. The method of intra predicting a current block includes: obtaining a predicted sample value from one or more reference sample values by using an intra prediction mode; obtaining at least one additional reference sample value in accordance with the intra prediction mode; and obtaining a thresholded additional reference sample value based on the additional reference sample value. The method also includes: calculating an additional value from the thresholded additional reference sample value; multiplying the predicted sample value by a sample weighting factor, resulting in a weighted predicted sample value; adding the additional value to the weighted predicted sample value, resulting in a non-normalized predicted sample value; and normalizing the non-normalized predicted sample value, resulting in a normalized predicted sample values. The accuracy for the intra prediction is increased.
(FR)
L'invention concerne des appareils et procédés pour réaliser une prédiction intra d'un bloc. Le procédé de prédiction intra d'un bloc courant consiste à : obtenir une valeur d'échantillon prédite à partir d'une ou plusieurs valeurs d'échantillon de référence au moyen d'un mode de prédiction intra ; obtenir au moins une valeur d'échantillon de référence supplémentaire conformément au mode de prédiction intra ; et obtenir une valeur d'échantillon de référence supplémentaire seuillée sur la base de la valeur d'échantillon de référence supplémentaire. Le procédé comprend également : le calcul d'une valeur supplémentaire à partir de la valeur d'échantillon de référence supplémentaire seuillée ; la multiplication de la valeur d'échantillon prédite par un facteur de pondération d'échantillon, conduisant à une valeur d'échantillon prédite pondérée ; l'ajout de la valeur supplémentaire à la valeur d'échantillon prédite pondérée, conduisant à une valeur d'échantillon prédite non normalisée ; et la normalisation de la valeur d'échantillon prédite non normalisée, conduisant à des valeurs d'échantillon prédites normalisées. La précision de la prédiction intra est accrue.
Also published as
EP2019905863
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