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Content analysis-oriented video coding optimization method

A content analysis and optimization method technology, applied in digital video signal modification, electrical components, image communication, etc., to achieve the effect of reducing the impact and improving the rate-distortion optimization method

Active Publication Date: 2017-08-22
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0004] In order to reduce the impact of video compression distortion on content analysis, the present invention proposes a content analysis-oriented video coding optimization method, aiming to solve the balance problem of bit rate, compression distortion and analysis distortion

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  • Content analysis-oriented video coding optimization method
  • Content analysis-oriented video coding optimization method

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Experimental program
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Embodiment

[0030] Taking moving target detection as an example, it includes the following steps:

[0031] 1. Select 4 surveillance videos (3 of which are The video is an indoor scene, and the other one is an outdoor scene) as training data, using literature (B.Lei, A.Leonardis, and B.Schiele, "Robust object detection with interleaved categorization and segmentation," Intl.J.ComputerVision, The moving target detection algorithm in vol.77, no.1, pp.259-289, 2008.) records the detection results.

[0032] 2. Set the quantization parameter QP (4-41) of the HEVC encoder to obtain 38 compressed videos of different qualities in 4 training videos, run the same detection algorithm, and record the detection results.

[0033] 3. Statistical experiment results, using the test results in the above 1 as a reference, and the test results in 2 as a comparison, using the F-measure evaluation index (Y.Dhome, N.Tronson, A.Vacavant, T.Chateau, C.Gabard , Y.Goyat, D.Gruyer, "A benchmark for background subtr...

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Abstract

The invention belongs to the technical field of video compression, and in particular relates to a content analysis-oriented video coding optimization method. The method disclosed by the invention comprises four parts including a content analysis distortion model, a content analysis distortion prediction model, a rate misalignment model, and rate distortion optimization. Influence of video compression distortion on a content analysis algorithm is quantified by construction of the content analysis distortion model; content analysis distortion is predicted by adoption of compression distortion SAD (Sum of Absolute Difference); the relationship between the content analysis distortion and the code rate is fitted by adoption of a e exponential function; the content analysis distortion is introduced into rate distortion optimization; minimization of the pixel distortion and the content analysis distortion is used as the optimization object; the existing rate distortion optimization method is improved; therefore, the content analysis distortion is finally reduced; and influence of the video compression distortion on the content analysis algorithm is weakened.

Description

technical field [0001] The invention belongs to the technical field of video compression, and in particular relates to a content analysis-oriented video coding optimization method. Background technique [0002] With the advancement and development of video communication technology, video data is growing explosively, especially in the field of video surveillance. Super-large surveillance video data is compressed and transmitted to the server, and the content is analyzed by the computer to achieve various purposes, such as Moving target detection, face recognition, behavior analysis, etc. Today, most video encoders are optimized to maximize human visual quality, causing compression artifacts that degrade the performance of subsequent content analysis algorithms. In the past few decades, researchers have proposed many methods to reduce the impact of compression artifacts on analysis algorithms, most of which are aimed at preserving local feature points. [0003] Chao and Stei...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/147H04N19/124
Inventor 朱策刘宇洋毛敏宋方良张翔
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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