摘要
首先简要介绍了一种典型的分布式视频编码-Wyner-Ziv视频编码。然后对Wyner-Ziv视频编码中边信息进行理论分析,随后给出了基于加权MAD准则的边信息估计算法和基于先验概率约束的联合解码算法。实验仿真结果表明,采用本文解码优化策略,在编码端相同输出码率情况下,重建解码图像的PSNR比原始算法平均提高1.5dB。
The Wyner-Ziv video coding,which is a kind of typical distributed video coding scheme,is introduced at first. Then the mathematical analysis of the side information in Wyner-Ziv video coding is given and we propose an improved decoding algorithm of Wyner-Ziv video coding based on side information estimation using weighted MAD motion estimation criterion and decoding reconstruction based on the prior model. The results of simulation tests show that average 1.5dB gain can be achieved by applying the proposed method.
出处
《信号处理》
CSCD
北大核心
2008年第4期609-613,共5页
Journal of Signal Processing
基金
江苏省自然科学基金(BK2004151)