Loop filtering method based on image macro block coding mode decision

A technology of loop filtering and encoding mode, which is applied in the field of video encoding and decoding, can solve the problems of video image content feature analysis, implementation complexity, inconvenience, etc., achieve good feasibility and implementability, improve objective quality, and widely use value Effect

Active Publication Date: 2012-01-18
江苏道波电气科技有限公司
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Problems solved by technology

However, the deblocking filter does not have the characteristics of frequency selection, so it cannot optimize the suppression of the quantization noise that causes the blocking effect.
Therefore, in video coding technology, a loop filter is used to improve the objective quality of the reconstructed image. The existing loop filter does not fully analyze the content characteristics of the video image by using the existing coding information of the image block, and the implementation is relatively complicated. Suppressing noise can cause blurr

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  • Loop filtering method based on image macro block coding mode decision
  • Loop filtering method based on image macro block coding mode decision
  • Loop filtering method based on image macro block coding mode decision

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[0050] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the following in conjunction with the accompanying drawings and preferred embodiments, the specific implementation of the loop filtering method based on image macroblock coding mode decision proposed according to the present invention The method, structure, characteristics and efficacy thereof are described in detail as follows.

[0051] A loop filtering method based on image macroblock coding mode decision according to a preferred embodiment of the present invention is applied to the block effect of the image after the quantization / inverse quantization of the video data stream, including the following steps:

[0052] Step 1. Design the model

[0053] According to the characteristics of video image content, four types of quadtrees and three types of filter taps are designed;

[0054] Four types of quadtree types: Type 1:...

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Abstract

The invention discloses a loop filtering method based on an image macro block coding mode decision, and is applied to an appeared diamond effect after video data flow over quantification/inverse quantization. The method comprises the following steps: (1) designing a model; (2) carrying out mode type classification on a present frame; (3) carrying out pre-filtering; (4) carrying out filtering; (5)determining whether to carry out loop filtering or not. According to the invention, characteristics of an image are fully taken into consideration, tedious decision of a present method is reduced andnoise brought by video compression is effectively filtered simultaneously, and realization complexity of a filter is reduced.

Description

technical field [0001] The present invention relates to the technical field of video coding and decoding, in particular to a loop filtering method and filter based on image macroblock coding mode decision. Background technique [0002] Video data has a huge amount of data, which is unbearable for the current limited transmission bandwidth or storage space, which makes video compression coding technology a hot spot of research and application at home and abroad. The current video coding standard adopts a block-based coding method. During the coding process, since the quantization process of the block transform coefficients is relatively rough, the transform coefficients restored by the inverse quantization process have errors, resulting in discontinuity on the image block boundary, that is, block effect. In order to reduce the blocking effect, a deblocking filter is employed to alleviate the blocking effect caused by video compression. However, the deblocking filter does not...

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Application Information

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IPC IPC(8): H04N7/26H04N7/32H04N19/82
Inventor 朱金秀邵永琴李莉孟雨
Owner 江苏道波电气科技有限公司
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