Journal of South China University of Technology(Natural Science Edition) ›› 2011, Vol. 39 ›› Issue (12): 7-12.

• Electronics, Communication & Automation Technology • Previous Articles     Next Articles

Bi-Directional Motion-Compensated Reconstruction Algorithm for Pixel-Domain Distributed Video Coding

Yang Chun-ling  Su Zhuo-han   

  1. School of Electronic and Information Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2011-06-13 Revised:2011-08-03 Online:2011-12-25 Published:2011-11-04
  • Contact: 杨春玲(1970-) ，女，教授，主要从事图像/视频压缩、图像质量评价等的研究． E-mail:eeclyang@ scut.edu.cn
  • About author:杨春玲(1970-) ，女，教授，主要从事图像/视频压缩、图像质量评价等的研究．
  • Supported by:

    国家自然科学基金资助项目( 60972135) ; 广东省自然科学基金资助项目( 06025642) ; 华南理工大学中央高校基本科研业务费专项资金资助项目( 2009ZM0231)

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Abstract:

In order to improve the objective and subjective quality of the decoded videos in distributed video coding ( DVC) systems,a bi-directional motion-compensated reconstruction ( BMCR) algorithm is proposed for the pixeldomain DVC. In this algorithm,the correlation between intra-frame and inter-frame videos is fully considered,and the pixels whose side information falls in the decoded quantization bins are directly reconstructed according to the side information values,while the pixels whose side information falls out of the decoded quantization bins are reasonably reconstructed by the bi-directional motion compensation with quantization bins. Experimental results indicate that,as compared with the commonly-used MMSE ( Minimum Mean Square Error) reconstruction algorithm,BMCR algorithm achieves an average PSNR increment of about 0.5 dB and effectively improves the visual quality of the decoded videos for the middle-and high-speed motion sequences in the Wyner-Ziv video coding system.

Key words: distributed video coding, Wyner-Ziv video coding, reconstruction, motion compensation