HEVC rate distortion optimization algorithm based on just-noticeable perception quality judging criterion

A rate-distortion optimization and perceptual quality technology, applied in the field of video coding, can solve problems such as picture interference and low MSE

Inactive Publication Date: 2014-12-17
ACAD OF BROADCASTING SCI SARFT +1
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AI Technical Summary

Problems solved by technology

Although MSE can reflect the true quality of the image in most cases, there are still some situations that MSE cannot reflect. For example, salt and pepper noise will cause huge interference to the picture, and the MSE of the entire frame image may not be very large.

Method used

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  • HEVC rate distortion optimization algorithm based on just-noticeable perception quality judging criterion
  • HEVC rate distortion optimization algorithm based on just-noticeable perception quality judging criterion
  • HEVC rate distortion optimization algorithm based on just-noticeable perception quality judging criterion

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Embodiment Construction

[0052] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0053] A HEVC rate-distortion optimization algorithm based on just observable perceptual quality decision criteria, such as figure 1 As shown, including the following steps:

[0054] Step 1. Before making mode decision on the encoding end of the high-efficiency video codec, analyze the motion mode and static texture characteristics of each macroblock in each frame to obtain the current macroblock's perceptual quality type, and according to different motion states Obtain a significant area of ​​the image.

[0055] In this step, for each coding unit CU of each frame, and each of its divided blocks, first establish a complete set of state attribute descriptors (Representing the state of the k-th macroblock in a frame at time t), as follows:

[0056] s k t = Normal state ( NS ) if MV k t ≠ 0 , R k t ...

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Abstract

The invention relates to an HEVC rate distortion optimization algorithm based on the just-noticeable perception quality judging criterion. The algorithm is characterized by including analyzing the motion models and static texture features of each macroblock of each frame, acquiring the perception quality type of the current macroblock, and acquiring the image salient region; calculating a just-noticeable distortion threshold on the basis of a visual salient region; calculating the perception quality on the basis of a just-noticeable distortion model; performing rate distortion optimization on the basis of the perception quality on the basis of the just-noticeable distortion model. The algorithm is reasonable in design, the HEVC rate distortion optimization is performed by the just-noticeable perception quality judging criterion, defects that MSE (mean-square errors) are uses for measuring the video distortion estimation standard can be overcome, and the final encoding effect can meet the visual subjective perception quality better; meanwhile, more noises can be tolerated on the premise that the subjective quality is maintained, unnecessary perception redundancy is removed, the compressing efficiency is improved, and the code rate of encoded files is decreased.

Description

Technical field [0001] The invention belongs to the technical field of video coding, in particular to an HEVC rate-distortion optimization algorithm based on just observable perceptual quality decision criteria. Background technique [0002] In recent years, with the rapid development of the national economy, technological progress and the continuous improvement of people’s requirements for video quality, HD / UHD video coding technology has become the basic core of future home theater, digital broadcast television, network video, and high-definition movies. Technology has become the focus of industry attention. For high-definition / ultra-high-definition video communications, the existing video coding standards still have a certain distance between the compression ratio and actual application requirements. To this end, the International Organization for Standardization ISO / IEC (MPEG) and ITU-T have launched the next-generation digital video compression standard plan—High Efficiency...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/154H04N17/00
Inventor 周芸于洋王辉淇李敬娜
Owner ACAD OF BROADCASTING SCI SARFT
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