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Motion compensation method for double-forward prediction unit

A technology of forward prediction and motion compensation, applied in the field of video coding

Active Publication Date: 2016-06-15
PEKING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the prior art, there is no method of fine-tuning the predicted image block at the pixel level to further improve the prediction quality

Method used

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  • Motion compensation method for double-forward prediction unit

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Embodiment Construction

[0053] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0054] Those skilled in the art will understand that unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the word "comprising" used in the description of the present invention refers to the presence of said features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, Integers, steps, operations, elements, components, and / or groups thereof. It will be understoo...

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/573H04N19/615
CPCH04N19/573H04N19/615
Inventor 马思伟赵磊张健
Owner PEKING UNIV
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