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1. WO2018120797 - INTRA-FRAME PREDICTION METHOD FOR INTER-FRAME PREDICTION FRAME

Publication Number WO/2018/120797
Publication Date 05.07.2018
International Application No. PCT/CN2017/094032
International Filing Date 24.07.2017
IPC
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
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 19/107
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
107between spatial and temporal predictive coding, e.g. picture refresh
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 19/503
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
50using predictive coding
503involving temporal prediction
Applicants
  • 北京大学深圳研究生院 PEKING UNIVERSITY SHENZHEN GRADUATE SCHOOL [CN]/[CN]
Inventors
  • 王荣刚 WANG, Ronggang
  • 范逵 FAN, Kui
  • 王振宇 WANG, Zhenyu
  • 高文 GAO, Wen
Agents
  • 北京万象新悦知识产权代理事务所 (普通合伙) BEIJING WANXIANGXINYUE INTELLECTUAL PROPERTY OFFICE
Priority Data
201611243035.329.12.2016CN
Publication Language Chinese (ZH)
Filing Language Chinese (ZH)
Designated States
Title
(EN) INTRA-FRAME PREDICTION METHOD FOR INTER-FRAME PREDICTION FRAME
(FR) PROCÉDÉ DE PRÉDICTION INTRA-TRAME DESTINÉ À UNE TRAME DE PRÉDICTION INTER-TRAME
(ZH) 一种用于帧间预测帧中的帧内预测方法
Abstract
(EN)
The present invention discloses an intra-frame prediction method for an intra-frame prediction block in an inter-frame prediction frame. When there is an inter-frame prediction block at a lower right side of an intra-frame prediction block, employ a lower right intra-frame prediction method by adjusting encoding and decoding sequences of intra-frame and inter-frame blocks, and perform prediction by using a reconstruction pixel value at the lower right side as a reference pixel point of the intra-frame prediction block. In an encoding stage, first encode each encoding unit, and after the encoding is completed, write all inter-frame prediction block information to a stream. Then, perform secondary encoding on the intra-frame prediction block. In the secondary encoding process, perform lower right intra-frame encoding. After the secondary encoding, write information of the intra-frame prediction block to the stream. In a decoding stage, first complete all inter-frame prediction block decoding, and then perform lower right intra-frame decoding on the intra-frame prediction block. The present invention can improve intra-frame prediction accuracy and encoding efficiency of intra-frame and inter-frame blocks.
(FR)
La présente invention concerne un procédé de prédiction intra-trame destiné à un bloc de prédiction intra-trame dans une trame de prédiction inter-trame. Le procédé consiste à : utiliser, lorsqu'il existe un bloc de prédiction inter-trame au niveau d'un côté inférieur droit d'un bloc de prédiction intra-trame, un procédé de prédiction intra-trame inférieure droite en ajustant des séquences de codage et de décodage de blocs intra-trame et inter-trame, et effectuer une prédiction en utilisant une valeur de pixel de reconstruction au niveau du côté inférieur droit en tant que point de pixel de référence du bloc de prédiction intra-trame. Dans une étape de codage, le procédé consiste d'abord à coder chaque unité de codage, et après que le codage est terminé, à écrire toutes les informations de bloc de prédiction inter-trame dans un flux. Ensuite, le procédé consiste à effectuer un codage secondaire sur le bloc de prédiction intra-trame. Dans le processus de codage secondaire, le procédé consiste à effectuer un codage intra-trame inférieur droit. Après le codage secondaire, le procédé consiste à écrire des informations du bloc de prédiction intra-trame dans le flux. Dans une étape de décodage, le procédé consiste d'abord à achever tout décodage de blocs de prédiction inter-trame, et ensuite à effectuer un décodage intra-trame inférieur droit sur le bloc de prédiction intra-trame. La présente invention permet d'améliorer la précision de prédiction intra-trame et l'efficacité de codage de blocs intra-trame et inter-trame.
(ZH)
本发明公布了一种帧内预测方法,针对位于帧间预测帧中的帧内预测块,当帧内预测块的右下侧存在帧间预测块时,通过调整帧内和帧间块的编码和解码顺序,采用右下帧内预测方法,使用右下侧的重建像素值作为帧内预测块的参考像素点进行预测。在编码阶段,先对每一个编码单元进行编码,编码完成后将所有的帧间预测块信息写入码流,再对该帧内预测块进行二次编码;在二次编码过程中进行右下帧内编码;完成二次编码后,再将该帧内预测块的信息写入码流;在解码阶段,先将所有的帧间预测块解码完成;再对帧内预测块进行右下帧内解码。本发明能够增加帧内预测精度,提升帧间预测帧中帧内预测块的编码效率。
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