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Hybrid predicting-based video encoding method

A technology of mixed prediction and prediction methods, applied in the field of video coding and decoding, can solve problems such as hindering coding efficiency and failing to achieve better prediction results

Inactive Publication Date: 2010-11-03
祝志怡
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Problems solved by technology

Intra-frame prediction is generally used as the prediction mode of macroblocks in the case of irregular or large motion, while inter-frame prediction is generally used as the prediction mode of macroblocks in the case of smooth motion, and whether a macroblock uses intra-frame prediction or Inter-frame prediction depends on the comprehensive consideration of the entire macroblock distortion and bit rate. The disadvantage of this method is that for some special video sequences, neither intra-frame prediction nor inter-frame prediction can achieve better prediction results. hinders the further improvement of coding efficiency

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Embodiment Construction

[0014] The following takes the AVS standard as an example to describe the preferred implementation manner of the present invention in detail. Proceed as follows:

[0015] 1. Determination of hybrid forecasting mode.

[0016] 1.1 There are 5 intra prediction modes in the AVS standard, namely Intra_8×8_Vertical, Intra_8×8_Horizontal, Intra_8×8_DC, Intra_8×8_Down_Left and Intra_8×8_Down_Right. At the same time, a 16×16 macroblock can be divided into 16× 16, 16×8, 8×16, 8×8 and Skip modes for prediction, so there are 25 pairs of mixed prediction modes that may appear.

[0017] 1.2 Combine the predicted values ​​of each intra-frame prediction and inter-frame prediction obtained in 1.1 according to the following formula:

[0018] CPM ( x , y ) = Intra ( x , y ...

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Abstract

The invention belongs to the technical field of video encoding in signal processing particularly relates to a predicting method and provides a hybrid predicting method in video encoding technology. The method is suitable for video encoding standards, such as MPEG, H.26x, AVs and the like. The information of an inter-frame predicting mode and the information of an intra-frame predicting mode are combined by analyzing a video image and the distribution characteristic of a predicted residual and a video sequence is predicted in a novel hydric predicting mode. Due to the adoption of the combination, the process of separately considering time domain correlation and air space correlation in conventional video encoding technology can be broken, image predicting accuracy is enhanced and compression efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of video encoding and decoding in signal processing, and in particular relates to a prediction method. Background technique [0002] The current mainstream video compression standards mainly include the MPEG series standards formulated by the Moving Picture Expert Group, the H.26x series standards formulated by the International Telecommunication Union (International Telecommunication Union), and my country's advanced audio and video coding standards with independent intellectual property rights ( Advanced Audio / Video Standard, AVS). In mainstream video compression standards, intra-frame prediction and inter-frame prediction are used to reduce the spatial redundancy and temporal redundancy of video images. They use the correlation between pixels to predict the current pixel and achieve the purpose of compression. Intra-frame prediction is generally used as the prediction mode of macroblocks in the case of ir...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26H04N7/32H04N19/31H04N19/33H04N19/503H04N19/593H04N19/70
Inventor 祝志怡
Owner 祝志怡
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