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AVS3 texture information-based CU block division method and apparatus, and medium

A technology of texture information and block division, which is applied in the field of video coding, can solve problems such as the complexity of coding algorithms, and achieve the effect of improving encoder speed, coding speed balance, and coding quality balance

Pending Publication Date: 2022-07-29
SUN YAT SEN UNIV
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Problems solved by technology

[0011] Aiming at at least one technical problem such as the complexity of the coding algorithm existing in the current AVS3 video coding technology, the purpose of the present invention is to provide a CU block division method based on AVS3 texture information, a computer device and a storage medium

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  • AVS3 texture information-based CU block division method and apparatus, and medium
  • AVS3 texture information-based CU block division method and apparatus, and medium

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Embodiment Construction

[0052] In this embodiment, refer to Figure 4 , the CU block division method based on AVS3 texture information includes the following steps:

[0053] S1. Obtain the variance Var and horizontal gradient G of the CU block to be divided x and the vertical gradient G x ;

[0054] S2. According to the horizontal gradient G x and the vertical gradient G x , determine the first gradient ratio G xy and the second gradient ratio G yx ;

[0055] S3. When the variance Var is less than the first threshold Th1, or the horizontal gradient G x and the vertical gradient G y are smaller than the second threshold Th2, select the non-divided mode as the optimal division mode; otherwise, compare the variance Var with the third threshold Th3;

[0056] S4. When the variance Var is greater than the third threshold Th3, skip the undivided mode; otherwise, use the first gradient ratio G xy Compare with the fourth threshold Th4;

[0057] S5. When the first gradient ratio G xy If it is great...

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Abstract

The invention discloses a CU block division method based on AVS3 texture information, a computer device and a storage medium, and the method comprises the steps: obtaining a variance, a horizontal gradient and a vertical gradient of a to-be-divided CU block, selecting to skip some division modes according to the relation between the variance, the horizontal gradient and the vertical gradient and a first threshold value, and obtaining candidate division modes, and selecting an optimal division mode from the candidate division modes, and dividing the CU block to be divided in the optimal division mode. According to the method, texture information is extracted based on the variance and the Scharr operator to divide the CU blocks into different categories, the variance with low complexity is used for analyzing a division mode pruning strategy of flat blocks and complex blocks, rapid division of the CU blocks is achieved, the speed of an AVS3 encoder is increased, the Scharr operator is used for considering fine textures and texture directions, and the method is suitable for large-scale popularization and application. The algorithm is balanced between the coding speed and the coding quality; the method is widely applied to the technical field of video coding.

Description

technical field [0001] The present invention relates to the technical field of video coding, in particular to a CU block division method based on AVS3 texture information, a computer device and a storage medium. Background technique [0002] With the development of network technology, there are more and more ways of disseminating information through video, and the requirements for video coding technology are also increasing. For example, although AVS3 has higher encoding quality than AVS2, the time complexity is about doubled, which will lead to a decrease in encoding speed when other conditions remain unchanged, which is not conducive to the application of new video encoding technologies. [0003] Terminology Explanation: [0004] Video coding: Video coding is a type of compression technology. By using the coding method, the video source file is compressed into a bit stream file on the premise of preserving the quality as much as possible, which can save the storage space ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/119H04N19/176H04N19/147H04N19/103H04N19/96
CPCH04N19/119H04N19/176H04N19/147H04N19/103H04N19/96
Inventor 梁凡贾一凡张坤
Owner SUN YAT SEN UNIV
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