泛在网络中基于压缩感知的Wyner-Ziv空域可分级视频编码  

Wyner-Ziv spatial scalable video coding using compressive sensing in ubiquitous networks

作　　者：干宗良[1] 齐丽娜[1] 唐贵进[1] 朱秀昌[1] 

机构地区：[1]南京邮电大学江苏省图像处理与图像通信重点实验室,江苏南京210016

出　　处：《通信学报》2010年第11期41-48,共8页Journal on Communications

基　　金：国家自然科学基金资助项目(60802021;61071091)~~

摘　　要：提出一种适用于泛在网络中的基于压缩感知的Wyner-Ziv空域可分级视频编码。在编码端,基本层和增强层之间独立编码,基本层编码器将视频信号下采样,然后进行H.264视频编码,增强层编码器采用自适应的压缩感知测量、量化和熵编码。在解码端,利用时域稀疏模型,基本层和增强层联合进行压缩感知重建。理论分析和实验结果表明,所提编码算法能够灵活地调整输出码流,具有较好的率失真性能和传输的顽健性。A novel Wyner-Ziv spatial scalable video coding using compressive sensing was proposed for the ubiquitous networks.At the encoder,both the base layer and enhancement layer encode the video signal independent,in which down-sampling video was coded by H.264 in the based layer and original video was coded with adaptive compressive sensing measurement,quantization and entropy coding in the enhancement layer.At the decoder,the base layer and enhancement layer jointly recovered the video signal using compressive sensing approach based on joint sparse model of inter frames.Theoretical analysis and experimental results show that the proposed video coding method can flexibly adjust the bit stream,and has better rate-distortion performance and the robustness of transmission.

关 键 词：泛在网络 Wyner-Ziv视频编码 可分级视频编码 压缩感知 

分 类 号：TN919.8[电子电信—通信与信息系统]