Method for analyzing and enhancing coding efficiency through effective residual error coefficient

A technology of residual coefficient and coding efficiency, which is applied in digital video compression, hardware implementation, improves coding efficiency through effective residual coefficient analysis, and achieves the effect of reducing the amount of data and obtaining simple weights

Inactive Publication Date: 2010-09-15
昆山杰得微电子有限公司
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Problems solved by technology

Through the special analysis and processing of residual coefficients, the coding efficiency and coding quality of video can be effectively improved, but how to implement it with simple hardware is a technical problem in the industry

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  • Method for analyzing and enhancing coding efficiency through effective residual error coefficient
  • Method for analyzing and enhancing coding efficiency through effective residual error coefficient
  • Method for analyzing and enhancing coding efficiency through effective residual error coefficient

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Embodiment Construction

[0011] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0012] The invention describes a method for effectively improving video coding efficiency and coding quality through special analysis and processing of residual coefficients in video coding. The principle is: weight the coefficients after DCT transformation to reflect their importance in encoding, and make reasonable choices according to the requirements of image quality.

[0013] Generally speaking, the image residual coefficient after DCT transformation will be concentrated in the low frequency part, which is also the reason for performing DCT transformation on the residual error during video compression. However, in the actual encoding process, occasionally residual data still exists in the high frequency part. Due to the rarity of this type of data, its encoding cost is very high in the specification of video compression. For im...

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Abstract

This method consists of two flows: the remnant difference coefficient (RDC) coding flow and the RDC analyzing flow. (1) Obtain the quantized RDC from the coding process. (2) Weight according to the RDC related position. (3) Scan RDC according to the appointed mode to obtain 'run' and 'lever' required by coding. Here, the coding expense differs when RDC level corresponds different RDC run. (4) Weight further on RDC according to obtained run / level. (5) Compare the weighted value with the preset threshold to regulate correspondingly RDC value. (6) Re-obtain the new run / level values to execute coding. This invention analyzes the different remnant difference (RD) feature and regulates RD value during the RDC coding process to raise coding efficiency and quality.

Description

technical field [0001] The present invention relates to the digital video compression technology in the field of computer and microelectronics, especially to the video compression technology and the hardware implementation technology based on DCT (discrete cosine transform, Discrete Cosine Transform) transformation, especially relate to a kind of through effective residual coefficient analysis to improve method for coding efficiency. Background technique [0002] In modern video compression technologies, including MPEG-1, 2, 4, WMV, and H.264, the residual coefficients are mostly encoded in the transform domain after DCT transformation. Through the special analysis and processing of the residual coefficients, the coding efficiency and coding quality of the video can be effectively improved, but how to implement it with simple hardware is a technical problem in the industry. Contents of the invention [0003] The technical problem to be solved by the present invention is t...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/24G06T9/00
Inventor 欧阳合唐谦叶玉国仲巡黄小振沈立芸林晓芸
Owner 昆山杰得微电子有限公司
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