| 嵌入式零树小波编码算法的优化及仿真实现 |
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| 引用本文： | 刘泽显,徐安农,黄廷辉,蒋英春.嵌入式零树小波编码算法的优化及仿真实现[J].桂林电子科技大学学报,2009,29(5). |
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| 作者姓名： | 刘泽显 徐安农 黄廷辉 蒋英春 |
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| 作者单位： | 1. 桂林电子科技大学,数学与计算科学学院,广西,桂林,541004
2. 桂林电子科技大学,计算机与控制学院,广西,桂林,541004 |
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| 摘 要： | 嵌入式零树小波编码算法存在扫描过程过于复杂和表示小波系数的符号总数过多两个缺陷,这些缺陷在很大程度影响着算法的扫描速度和编码效率.通过两个方面的优化可以减少这些缺陷造成的影响:一是引入有效子带矩阵来决定是否对某个不重要的小波系数的后代子孙结点进行扫描,这样有效地减少了扫描的时间;二是采用6种符号来表示小波系数,很大程度上减少了表示小波系数的符号总数,也就极大地减少了编码表示小波系数的符号.经过优化后的嵌入式零树小波编码算法不但加快了扫描速度,也提高了编码效率.
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| 关 键 词： | 嵌入式零树小波编码算法 小波变换 有效子带矩阵 |
Implementation of optimized embedded zero-tree wavelet coding algorithm |
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| LIU Ze-xian,XU An-nong,HUANG Ting-hui,JIANG Ying-chun.Implementation of optimized embedded zero-tree wavelet coding algorithm[J].Journal of Guilin Institute of Electronic Technology,2009,29(5). |
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| Authors: | LIU Ze-xian XU An-nong HUANG Ting-hui JIANG Ying-chun |
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| Affiliation: | LIU Ze-xian1,XU An-nong1,HUANG Ting-hui2,JIANG Ying-chun1 (1.School of Mathematics Computational Science,Guilin University of Electronic Technology,Guilin 541004,China,2.School of Computer Science Control Technology,China) |
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| Abstract: | In the research of embedded zero-tree wavelet algorithm,we found that the scanning process is too complex and the total symbols which are marked wavelet coefficients are too much.These flaws affect scanning speed and coding efficiency of embedded zero-tree wavelet algorithm to a large extent.To reduce the impact of these flaws,we take two kinds of optimizations: one was introduce effective subband matrix to determine whether the descendants of a un-significant coefficient could be scanned,the other was use ... |
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| Keywords: | embedded zero-tree wavelet algorithm wavelet transform effective subband matrix |
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