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Block effect denoising method and device

A technology of block effect and macroblock, applied in the field of video coding, which can solve the problems of decreased coding performance and decreased subjective video experience.

Inactive Publication Date: 2011-07-13
深圳市云宙多媒体技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the embodiment of the present invention is to propose a block effect denoising method and device, aiming to solve the problems in the prior art that the existence of artificial noise in the signal source leads to the degradation of coding performance and the degradation of the subjective experience of the video

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  • Block effect denoising method and device

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Embodiment 1

[0099] The present invention proposes a block effect denoising method, see figure 1 , the method is specifically:

[0100] Step 101: Divide the current frame into macroblocks, and the area adjacent to the second macroblock in the first macroblock is the first edge area;

[0101] see figure 2 , the first macroblock and the second macroblock are two adjacent macroblocks, the first macroblock is the A region, and the second macroblock is the B region; the first edge region is the first macroblock and the second macroblock An edge area adjacent to the block, the second edge area is an edge area adjacent to the first macroblock in the second macroblock;

[0102] In the present invention, for the convenience of expression, figure 2 Only two cases where the first macroblock A and the second macroblock B are adjacent to the left and right are listed;

[0103] Step 102: judging whether the first edge area is a blocky area, if so, proceed to step 103; if not, proceed to step 105; ...

Embodiment 2

[0148] The present invention proposes a block effect denoising device, see Figure 6 , the device includes: a dividing unit, a detecting unit, and a filtering unit;

[0149] A division unit, configured to divide the current frame into macroblocks, and the area adjacent to the second macroblock in the first macroblock is the first edge area;

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Abstract

The invention provides a block effect denoising method. The block effect denoising method comprises the following steps of: dividing the current frame into macro blocks, wherein a region in which a first macro block and a second macro block are adjacent to each other is a first edge region; judging whether the first edge region is a block effect region; if the first edge region is the block effect region, marking the first edge region; computing the percent of the marked first edge region based on the current frame edge region; and if the percent is greater than a preset first parameter, performing block effect filtering. The invention also provides a block effect denoising device. The device comprises a dividing unit, a detection unit and a filtering unit. Through the method and the device, the image quality of the edge region between the adjacent macro blocks is detected, and if the image quality is lower than a predetermined level, the block effect filtering is performed according to pixels between the two adjacent macro blocks, so that the problem of low coding performance in the change coding and quantification technology of given macro blocks in the prior art is effectively solved.

Description

technical field [0001] The present invention relates to the field of video coding, in particular to a block effect denoising method and device. Background technique [0002] In commonly used video coding, in order to remove the correlation in image signals and reduce the dynamic range of image coding, transform coding and quantization techniques based on macroblocks are usually used. When the encoding quantization parameter is large, due to the suppression of high-frequency signals, strong block effects may appear at the macroblock boundaries of the encoded video, and ringing effects may appear near strong edges. The artificial noise generated by these encodings will reduce the video quality. Subjective feelings. When encoding such video sequences with artificial noise, the encoding performance will also decrease. [0003] Therefore, it is necessary to propose a video artificial noise analysis algorithm and a method to improve the coding performance when artificial noise o...

Claims

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Application Information

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IPC IPC(8): H04N7/26
CPCH04N7/26H04N19/86
Inventor 张智雄
Owner 深圳市云宙多媒体技术有限公司