计算机工程 ›› 2011, Vol. 37 ›› Issue (14): 277-279.doi: 10.3969/j.issn.1000-3428.2011.14.094

• 开发研究与设计技术 • 上一篇    下一篇

基于联合估计的Wyner-Ziv系统边信息重建

卿粼波,沈卫红,何小海   

  1. (四川大学电子信息学院,成都 610064)
  • 收稿日期:2010-12-23 出版日期:2011-07-20 发布日期:2011-07-20
  • 作者简介:卿粼波(1982-),男,讲师、博士,主研方向:通信与信息系统;沈卫红,硕士研究生;何小海,教授、博士
  • 基金项目:
    欧盟FP7-PEOPLE-IRSES-S2EuNeT基金资助项目(2470 83);四川大学青年科学基金资助项目“分布式视频编码核心理论与技术研究”(校青2008005)

Reconstruction of Side Information in Wyner-Ziv System Based on Joint Estimation

QING Lin-bo, SHEN Wei-hong, HE Xiao-hai   

  1. (College of Electronics and Information Engineering, Sichuan University, Chengdu 610064, China)
  • Received:2010-12-23 Online:2011-07-20 Published:2011-07-20

摘要: 在不显著增加解码复杂度的前提下,为提高Wyner-Ziv视频编码系统的边信息(SI)重建质量,提出一种基于SI信度的整像素/半像素联合估计算法。该算法引入一个SI质量判定因子判断边信息的重建质量,根据SI置信度是否超过设定的判别阈值进行整像素和半像素边信息重建方法的自适应切换。实验结果表明,在保持甚至超过传统亚像素边信息重建算法性能的基础上,该算法明显降低了系统解码复杂度。

关键词: Wyner-Ziv视频编码, 运动补偿内插, 整像素, 半像素, 联合估计

Abstract: In order to improve the quality of Side Information(SI), without significantly increase the complexity at the same time, a new SI generation algorithm jointly using full-pixel and half-pixel Motion Compensation Interpolation(MCI) is proposed. A quality decision factor namely SI confidence is proposed to indicate the quality of SI. According to the SI confidence whether overtakes the threshold, the algorithm adaptively switches between full-pixel MCI and half-pixel MCI. Experimental results indicate that the proposed algorithm can significantly reduce the decode complexity without causing efficiency loses when compared with traditional SI reconstruction based on sub-pixel method.

Key words: Wyner-Ziv video coding, Motion Compensated Interpolation(MCI), full-pixel, half-pixel, joint estimation

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