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A block effect denoising method and device

A block effect and macroblock technology, applied in the field of video coding, can solve problems such as the decline of subjective video experience and the decline of coding performance

Inactive Publication Date: 2015-10-28
深圳市云宙多媒体技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A 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

[0149] 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;

[0150] 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

A blocking effect de-noising method and apparatus are disclosed by the present invention. The method includes: dividing a current frame into macro blocks, wherein, a first macro block and a second macro block are adjacent macro blocks, and an area of the first macro block adjacent to the second macro block is a first edge area; judging whether the first edge area is a blocking effect area, if so, then marking the first edge area; calculating a percentage of the marked first edge area to the total edge area in the current frame; and performing blocking effect filtering if the percentage is greater than a preset first parameter. A blocking effect de-noising apparatus is also disclosed in the present invention, and the apparatus includes a division unit, a detection unit and a filtering unit. The method and apparatus of the present invention enables detecting image quality of the edge area between the adjacent macro blocks, and performing blocking effect filtering according to pixels between the adjacent two macro blocks if the image quality is lower than a preset level, thus effectively solving the problem in the prior art that the encoding performance of the macro-block-based variable encoding and quantization technique is low.

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...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/86
CPCH04N19/86
Inventor 张智雄
Owner 深圳市云宙多媒体技术有限公司