Method and system for reordering and inversely reordering predicted residual blocks

A technology for predicting residuals and sorting methods, applied in the field of video coding, can solve the problems of increasing the number of transformation functions, high codec storage complexity, etc., and achieve the effect of reducing storage complexity

Inactive Publication Date: 2010-11-24
PEKING UNIV
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Problems solved by technology

These methods have significantly improved the performance of H.264/AVC intra-frame coding, but at the same time increased the complexity of the encoder and

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  • Method and system for reordering and inversely reordering predicted residual blocks
  • Method and system for reordering and inversely reordering predicted residual blocks
  • Method and system for reordering and inversely reordering predicted residual blocks

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Embodiment Construction

[0018] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0019] refer to image 3 , image 3 It is a flow chart of the steps of an embodiment of a method for reordering prediction residuals in video coding according to the present invention, including the following steps: step 110 of the reordering method is set, and the prediction residual blocks are set according to the amplitude distribution of the prediction residual blocks obtained by statistics reordering method, and all possible reordering methods of prediction residual blocks are two or more; reordering step 120, according to the reordering method of residual blocks obtained in the step of setting reordering method, in the residual Before the difference block is transformed, the residual values ​​in the residual block are reord...

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Abstract

The invention discloses a method and a system for reordering and inversely reordering predicted residual blocks. The method comprises that: according to the amplitude distribution of the predicted residual blocks obtained by statistics, methods for ordering the predicted residual blocks are set, and all possible methods for ordering the predicted residual are two or more than two; and according to the methods for ordering the residual blocks, residuals in the residual blocks are reordered before the residual blocks are converted. By reordering the residual sampling values in the residual blocks in a null field, statistical characteristics of residuals in different modes are approximately same, so the performance approximate to mode related transformation is realized by only using a small number of transformation functions, and the storage complexity of a coder decoder is simultaneously reduced.

Description

technical field [0001] The invention relates to a video coding method, in particular to a method and system for reordering and reverse reordering of prediction residual blocks. Background technique [0002] Under the framework of existing video coding standards, the new generation of video coding standard H.264 / AVC has greatly improved the coding efficiency and will become the mainstream standard of video information compression format in the future. [0003] In a video encoder, video data is first divided into several 16×16 blocks, each of which is called a macroblock (Macroblock), and the process of video coding is based on a macroblock (Macroblock) unit carried out. In the process of encoding a macroblock, the encoder will further divide the macroblock into multiple smaller units, such as 16 4×4 blocks, such as figure 1 as shown, or four 8×8 blocks, etc. Take the intra-frame coding of 4×4 blocks in H.264 / AVC as an example, such as figure 2 As shown, the encoder first...

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Application Information

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IPC IPC(8): H04N7/26H04N7/32H04N19/176H04N19/593H04N19/88
Inventor 高文赵欣张莉马思伟
Owner PEKING UNIV
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