| 一种抗误码能力强的视频压缩SPIHT改进算法 |
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| 引用本文： | 高佳,胡波,徐晟.一种抗误码能力强的视频压缩SPIHT改进算法[J].电路与系统学报,2009,14(4). |
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| 作者姓名： | 高佳 胡波 徐晟 |
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| 作者单位： | 复旦大学,电子工程系,上海,200433 |
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| 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.
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| 关 键 词： | 视频压缩 三维等级树集合划分算法(3D-SPIHT) 抗误码 |
An error-resilient scheme of SPIHT video coding |
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| GAO Jia,HU Bo,XU Sheng.An error-resilient scheme of SPIHT video coding[J].Journal of Circuits and Systems,2009,14(4). |
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| Authors: | GAO Jia HU Bo XU Sheng |
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| Affiliation: | GAO Jia,HU Bo,XU Sheng(Department of Electronic Engineering,Fudan University,Shanghai 200433,China) |
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| Abstract: | 3D-SPIHT coding based on wavelet 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 oth... |
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| Keywords: | video compression three dimensional set partitioning in hierarchical tree(3D-SPIHT) error-resilience |
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