A method and device for sub-pixel motion estimation

A motion estimation and sub-pixel technology, which is applied in the field of video coding, can solve problems such as slow running speed, cumbersome process, and increased complexity of CU division, and achieve the effect of reducing resource consumption and speeding up coding speed

Active Publication Date: 2021-12-03
杭州博雅鸿图视频技术有限公司
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Problems solved by technology

[0002] In the AVS3 video coding standard, the size of the LCU (largest coding unit, maximum coding unit) is extended from 64x64 to 128x128, and in the coding unit of BT (binary tree, binary tree) and QT (quad-tree, quadtree) ( In addition to the CU, coding unit) division mode, the EQT (extended quad-tree, enhanced quadtree) division mode is introduced, which makes the complexity of CU division increase sharply
[0003] Due to the increase in the complexity of CU division, and the cumbersome process of CU's fractional motion estimation (FME, fractional motionestimation), resulting in fractional motion estimation not only consumes too many resources, but also runs very slowly, making hardware implementation difficult

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[0026] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with aspects of the invention as recited in the appended claims.

[0027] The terminology used in the present invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used herein and in the appended claims, the singular forms "a", "the", and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It should also be understood that the term "and / or" as use...

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Abstract

The present invention discloses a pixel-by-pixel motion estimation method and device. The method includes: adopting BT mode and QT mode for the current LCU block to perform the first CU division, and adopting the EQT mode for the current LCU block to perform the second CU division; for each For the first CU, perform sub-pixel motion estimation on the first CU to obtain the sub-pixel motion vector of the first CU; for each second CU, use the sub-pixels of the first CU that have the same size as the second CU and have an overlapping area The motion vector determines the sub-pixel motion vector of the second CU. The present invention determines the sub-pixel motion vector of the CU divided by the EQT mode by using the sub-pixel motion vector of the CU divided by the BT mode and the QT mode, so as to reduce the number of CUs for the sub-pixel motion estimation process and reduce resource consumption. Speed ​​up your coding.

Description

technical field [0001] The present invention relates to the technical field of video coding, in particular to a method and device for sub-pixel motion estimation. Background technique [0002] In the AVS3 video coding standard, the size of the LCU (largest coding unit, maximum coding unit) is extended from 64x64 to 128x128, and in the coding unit of BT (binary tree, binary tree) and QT (quad-tree, quadtree) ( In addition to the CU, coding unit) division mode, the EQT (extended quad-tree, enhanced quadtree) division mode is introduced, which makes the complexity of CU division increase sharply. [0003] Due to the increase in the complexity of CU division and the cumbersome process of CU fractional motion estimation (FME, fractional motion estimation), the fractional motion estimation not only consumes too many resources, but also runs very slowly, making hardware implementation difficult. Contents of the invention [0004] The purpose of the present invention is to propos...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/513H04N19/523H04N19/96
CPCH04N19/513H04N19/523H04N19/96
Inventor 向国庆曾毓宁张广耀束文韬宋磊
Owner 杭州博雅鸿图视频技术有限公司
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