Electronics, Communication & Automation Technology

Progressive Quantization Algorithm for Video Signal Acquisition Based on Compressed Sensing

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  • School of Electronic and Information Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China
杨春玲(1970-),女,博士,教授,主要从事图像/视频压缩研究、图像质量评价研究.

Received date: 2015-10-19

  Revised date: 2016-01-29

  Online published: 2016-04-12

Supported by

Supported by the National Natural Science Foundation of China(61471173) and the Natural Science Foundation of Guangdong Province(2016A030313455)

Abstract

In the video signal acquisition process on the basis of compressed sensing,the quantization method of measured values influences the reconstructed quality remarkably.In order to design a high-performance quantiza- tion method of measured values,a progressive quantization algorithm for compressed video sensing measurements named VPQ (Video Progress Quantization) is proposed on the basis of the inter-frame correlation of videos and the characteristics of measured compressed video sensing signals.In this algorithm,the measured non-key frames are quantized and only some bitplanes with less importance are transmitted.At the decoder,neighbor reconstructed frames are applied to motion estimation to generate the side information of non-key frames,and then the non-key frame measurements are estimated by measuring the side information frame.Finally,in combination with the bit- planes with less importance transmitted from the encoder,accurate measurements are obtained via the inverse quantization of progressive quantization.Experimental results show that,in comparison with uniform scalar quanti- zation,the proposed VPQ algorithm helps greatly decrease the code rate without additional complexity and recon- struction quality degradation; and that it is of higher rate-distortion performance,with a gain ranging from 0. 5 to 2. 0 dB for different sequences.

Cite this article

YANG Chun-ling LIU Xuan . Progressive Quantization Algorithm for Video Signal Acquisition Based on Compressed Sensing[J]. Journal of South China University of Technology(Natural Science), 2016 , 44(5) : 15 -21 . DOI: 10.3969/j.issn.1000-565X.2016.05.003

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