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H.266/VVC rapid CU division decision method based on gradient and variance

A decision-making method and gradient technology, applied in the field of image processing, can solve the problems of poor rate-distortion control and large coding time expenditure, and achieve the effect of coding quality balance, reducing complexity and good coding quality.

Active Publication Date: 2021-06-08
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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Problems solved by technology

[0006] In view of the deficiencies in the above-mentioned background technology, the present invention proposes an H.266 / VVC fast CU partition decision-making method based on gradient and variance, which solves the technical problems of large coding time expenditure and poor rate-distortion control in the existing fast CU partition technology

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  • H.266/VVC rapid CU division decision method based on gradient and variance

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[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0042] Such as figure 1 As shown, the embodiment of the present invention provides a fast H.266 / VVC CU partition decision method based on gradient and variance, and uses variance and gradient to judge the nature of CU texture, so as to realize early detection of unnecessary partition modes. Terminate or skip to speed up the CU partitioning process while ensuring the encoding quality. Based on the present invention, three methods are proposed, namely early ter...

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Abstract

The invention provides an H.266 / VVC rapid CU division method based on gradient and variance, which comprises the following steps: firstly, evaluating the homogeneity of a current CU according to a variance value, and judging whether the current CU can be stopped from being further divided in advance or not; secondly, extracting gradient features of the current CU through a Sobel operator, judging whether QT division can be conducted on the current CU or not, and skipping BT division and TT division; and finally, extracting edge features of the texture of the current CU by using a Canny operator, excluding the MT division in the vertical or horizontal division direction according to the texture trend of the current CU, taking the MT division in the other direction as a candidate, and taking the division mode with the minimum RDO-cost as an optimal division mode. According to the method, decision making is carried out on CU division step by step, the CU division process is accelerated through early termination and early skipping, the complexity of CU division is obviously reduced under the condition that the coding quality is guaranteed, and the coding efficiency is greatly improved.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to an H.266 / VVC fast CU division decision-making method based on gradient and variance. Background technique [0002] With the development of multimedia equipment and the popularization of high-quality video, especially after the ultra-high-definition video (HDR) is more widely used, the traditional video coding standard H.265 / HEVC can no longer effectively meet the high-quality and low-bit-rate video compression requirements. . In order to meet the application and development of high-quality video, a new generation of video coding standard H.266 / VVC was established and gradually improved. The resulting huge data volume and coding complexity hindered the further development and application of video coding technology. [0003] In order to reduce the complexity of intra-frame prediction in H.266 / VVC and improve the coding efficiency under the premise of almost constant video...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/119H04N19/147H04N19/96
CPCH04N19/119H04N19/147H04N19/96
Inventor 张秋闻刘伟华赵永博崔腾耀郭睿骁赵进超王晓蒋斌黄立勋张伟伟钱晓亮吴庆岗常化文魏涛孙丽君
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY