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1. CN111385575 - Inter-frame prediction method and device, corresponding encoder and corresponding decoder

Office China
Application Number 201811645808.X
Application Date 29.12.2018
Publication Number 111385575
Publication Date 07.07.2020
Publication Kind A
IPC
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 19/44
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
44Decoders specially adapted therefor, e.g. video decoders which are asymmetric with respect to the encoder
H04N 19/52
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
51Motion estimation or motion compensation
513Processing of motion vectors
517by encoding
52by predictive encoding
H04N 19/61
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
60using transform coding
61in combination with predictive coding
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-H04N19/85103
91Entropy coding, e.g. variable length coding or arithmetic coding
CPC
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 19/44
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
44Decoders specially adapted therefor, e.g. video decoders which are asymmetric with respect to the encoder
H04N 19/52
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
51Motion estimation or motion compensation
513Processing of motion vectors
517by encoding
52by predictive encoding
H04N 19/61
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
60using transform coding
61in combination with predictive coding
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 HUAWEI TECHNOLOGIES CO., LTD.
华为技术有限公司
Inventors CHEN XU
陈旭
ZHENG JIANHUA
郑建铧
Title
(EN) Inter-frame prediction method and device, corresponding encoder and corresponding decoder
(ZH) 帧间预测方法、装置以及相应的编码器和解码器
Abstract
(EN)
The invention discloses an inter-frame prediction method and device, a corresponding encoder and a corresponding decoder. The inter-frame prediction method comprises the steps: acquiring a motion vector prediction value of a current image block; obtaining an index value of the length of a motion vector difference value of the current image block, wherein the motion vector difference value of the current image block is used for indicating the difference between the motion vector prediction value and a motion vector target value of the current image block; determining target length information from a candidate length information set according to the index value of the length, wherein the candidate length information set only comprises candidate length information of N motion vector differences, and N is a positive integer greater than 1 and less than 8; obtaining a motion vector difference value of the current image block according to the target length information; determining a motion vector target value of the current image block according to the motion vector difference value of the current image block and the motion vector prediction value of the current image block; and obtaining a prediction block of the current image block according to the motion vector target value of the current image block. By implementing the method, the encoding and decoding efficiency can be improved.

(ZH)
一种帧间预测方法方法以及装置以及相应的编码器和解码器,该方法包括:获取当前图像块的运动矢量预测值;获取所述当前图像块的运动矢量差值的长度的索引值,所述当前图像块的运动矢量差值用于指示所述运动矢量预测值与所述当前图像块的运动矢量目标值之间的差异;根据所述长度的索引值从候选长度信息集合中确定出目标长度信息,所述候选长度信息集合仅包括N个运动矢量差值的候选长度信息,N为大于1并且小于8的正整数;根据所述目标长度信息,得到所述当前图像块的运动矢量差值;根据所述当前图像块的运动矢量差值和所述当前图像块的运动矢量预测值,确定所述当前图像块的运动矢量目标值;根据所述当前图像块的运动矢量目标值,得到所述当前图像块的预测块。实施本申请能够提高编解码效率。

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