一种抗误码能力强的视频压缩SPIHT改进算法  

An error-resilient scheme of SPIHT video coding

作　　者：高佳[1] 胡波[1] 徐晟[1] 

机构地区：[1]复旦大学电子工程系,上海200433

出　　处：《电路与系统学报》2009年第4期74-78,共5页Journal of Circuits and Systems

摘　　要：基于小波域的3D-SPIHT算法是一种高效的视频压缩编码方法,但其抗误码能力仍有待提高。本文提出了一种改进的3-D DWT-SPIHT分树编码方法。在不改变原算法小波树结构的前提下,插入编解码链表同步点,将整个帧组分为多棵子树独立编码和传输,从而将差错传播局限在每棵独立子树内,控制了差错传播范围。通过仿真实验证明了该算法与原算法相比具有较高的抗误码能力。3D-SPIHT coding based on wavelef transform is a highly efficient video compression algorithm. But this method is very sensitive to transmission bit errors. In this paper, we propose a sub-tree 3-D DWT-SPIHT coding algorithm, in which wavelet coefficients are grouped into independent coding units and processed separately to prevent error propagation. Instead of changing the original wavelet tree structure, lists synchronization between coding and decoding is added. Therefore, errors in one sub tree do not effect other sub trees. Experiment results have shown that this new algorithm has much better performance on error-resilience than the original one.

关 键 词：视频压缩 三维等级树集合划分算法(3D-SPIHT) 抗误码 

分 类 号：TN919.81[电子电信—通信与信息系统]