Motion compensation method for double-forward prediction unit

A technology of forward prediction and motion compensation, applied in the field of video coding
CN105681809AActive Publication Date: 2016-06-15PEKING UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
PEKING UNIV
Publication Date
2016-06-15

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Abstract

The embodiment of the invention provides a motion compensation method for a double-forward prediction unit. The method mainly comprises following steps of obtaining two initial double-forward prediction image blocks for predicting a current image block; selecting pixels on the two initial double-forward prediction image blocks; utilizing a gradient calculation formula to calculate x direction and y direction derivatives of the pixels on the forward prediction image blocks; through adoption of a training window, calculating the offset values of the pixels on the forward prediction image blocks; and adjusting the positions of the pixels on the forward prediction image blocks according to the x direction and y direction derivatives and the offset values of the pixels on the forward prediction image blocks. According to the motion compensation method for the double-forward prediction unit provided by the embodiment of the invention, the prediction effects of the prediction image block can be further improved on the basis of not increasing a code rate; the accuracies of prediction image blocks are improved; therefore, the prediction quality of the current image block is improved; and the coding efficiency of the double-forward prediction unit is improved.
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Description

technical field

[0001] The present invention relates to the technical field of video coding, in particular to a motion compensation method for double forward prediction units. Background technique

[0002] With the wide application of multimedia technology and the increasing expansion of multimedia data, the importance of video coding technology has become increasingly prominent. Modern coding techniques employ a hybrid coding framework, including processes such as prediction, transform, quantization, and entropy coding. Predictive coding includes intra-frame prediction and inter-frame prediction. The former is to use the coded and reconstructed image blocks in the same frame to predict the current image block to be coded, and the latter is to use the coded and reconstructed images of other frames to predict the current image block. The image to encode for prediction. Among them, the inter-frame predictive coding utilizes the time correlation of the video sequence and remo...

Claims

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