Rate distortion optimization method based on significance weighting

A rate-distortion optimization and rate-distortion technology, applied in the video field, can solve problems such as huge encoding complexity, achieve the effects of reducing bit rate, improving compression quality, and high encoding efficiency

Active Publication Date: 2019-03-08
深圳市北辰星途科技有限公司
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Problems solved by technology

However, this improvement in compression performance also brings a huge coding complexity, which still needs further research and improvement

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  • Rate distortion optimization method based on significance weighting
  • Rate distortion optimization method based on significance weighting
  • Rate distortion optimization method based on significance weighting

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[0037] 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.

[0038] After calculating the visual saliency of the video, these salient areas (areas that people tend to pay more attention to in a statistical sense) are given better compression quality, and the compression quality of non-salient areas can be appropriately reduced without excessive distortion so that Reduce the video bit rate. Therefore, starting from the core idea of ​​rate-distortion optimization, the present invention proposes a significance-weighted rat...

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Abstract

The invention discloses a rate distortion optimization method and a rate distortion optimization device based on significance weighting. The method comprises the following steps: acquiring salience values of each CU block in a video, and calculating a perceived priority distortion; and adding the perceived priority distortion to the traditional rate distortion calculation method to acquire a finaloptimal object. The method brings the significance feature of the current block into the traditional rate distortion calculation method to realize perceived priority, which can improve the compression quality of the significance area, reduce the code rate at the same time with high coding efficiency, and reduce the computation complexity.

Description

technical field [0001] The present invention relates to the field of video technology, and more specifically relates to a rate-distortion optimization method and device based on significance weighting. Background technique [0002] At present, with the continuous development of video compression technology, high-quality, high-real-time video has become a development trend, which also promotes the rapid development of high-definition and ultra-high-definition video applications. At present, HEVC (High Efficiency Video Coding), a new generation of video coding standard, retains the framework of traditional video coding and adopts new achievements in video compression technology research in recent years, so that its coding performance can basically reach the 2 standard of H.264 / AVC standard. times. However, this improvement in compression performance also brings a huge coding complexity, which still needs further research and improvement. At the same time, with the improvemen...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/147H04N19/176H04N19/503
CPCH04N19/147H04N19/176H04N19/503
Inventor 祝世平刘畅
Owner 深圳市北辰星途科技有限公司
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