Method and apparatus for determining weight factors, and method and apparatus for predicting intra-frame weighting

A technology of weight factor and weighted prediction, applied in the field of communication, can solve the problems of large hardware implementation cost, increase power consumption of codec devices, reduce codec processing speed, etc., to achieve the effect of improving processing speed and reducing processing power consumption

Active Publication Date: 2015-01-21
HUAWEI TECH CO LTD
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Problems solved by technology

This division operation will bring a large hardware implementation cost in practical applications, and at the same time will reduce the processing speed of the codec and increase the power consumption of the codec device

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  • Method and apparatus for determining weight factors, and method and apparatus for predicting intra-frame weighting
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  • Method and apparatus for determining weight factors, and method and apparatus for predicting intra-frame weighting

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[0043] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0044] Such as figure 2 As shown, the embodiment of the present invention provides a method for determining two weighting factors used in pairs, including:

[0045] S101. Determine the second value according to the difference between the abscissa component and the ordinate component of the current pixel in the currently processed image block. As the coordinate origin, the abscissa direction is horizontal to the right, and the ordinate direction is vertically down...

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Abstract

Disclosed are a method and device for determining a weight factor, and a method and device for intra-frame weighted prediction, comprising: determining, according to a difference between an abscissa component and an ordinate component of a current pixel in a currently processed image block, a second value; and determining, according to a first value and the second value, two weight factors of the current pixel, one weight factor being a sum of the first value and the second value, the other weight factor being a difference between the first value and the second value, and a sum of the two weight factors being double of the first value. The first value is determined according to an image block size of the currently processed image block or is preset. The processing speed of a codec is improved, and the processing power consumption thereof is reduced.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method, device and system for weighted prediction in intra-frame prediction coding and decoding of video images. Background technique [0002] Intra-frame prediction refers to using surrounding reconstructed pixel values ​​to predict the pixel value of the currently processed image block, which is one of the important modules in the video image codec. In order to ensure that the encoder and the decoder get the same reconstructed video image, the intra prediction modules in the encoder and the decoder are exactly the same. Specifically, the module input, the algorithm flow within the module, and the module output are exactly the same. Intra-frame prediction technologies generally include two types of technologies, directional prediction (Directional Prediction) and direct current prediction (DC Prediction). When there is directional texture in the video image co...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/50
CPCH04N19/11H04N19/176H04N19/105
Inventor 杨海涛周建同
Owner HUAWEI TECH CO LTD
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