| 引用本文: | 何焰兰,秦石桥,苏勇,等.对DJ小波VisuShrink去噪法中j0取值的分析.[J].国防科技大学学报,1998,20(6):102-108.[点击复制] |
| He Yanlan,Qin Shiqiao,Su Yong,et al.Analysis of the Parameter j0 in DJ's VisuShrink Denoising[J].Journal of National University of Defense Technology,1998,20(6):102-108[点击复制] |
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| 对DJ小波VisuShrink去噪法中j0取值的分析 |
| 何焰兰, 秦石桥, 苏勇, 杨彦 |
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(国防科技大学 应用物理系 湖南 长沙 410073)
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| 摘要: |
| DJ小波VisuShrink去噪法在数字信号处理方面的应用已十分广泛, 但是去噪后恢复信号质量的优劣与低分辨率截断参数j0的选取是密切相关的, 而j0的选取又与被污染信号的噪声指数σ以及采样率有关。这篇文章对这些关系进行了分析, 并给出了仿真计算的结果, 分析与计算的结论对如何选取最佳低分辨率截断参数j0具有一定的指导意义。 |
| 关键词: 小波去噪, 波形恢复, VisuShrink法 |
| DOI： |
| 投稿日期：1998-03-20 |
| 基金项目: |
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| Analysis of the Parameter j0 in DJ's VisuShrink Denoising |
| He Yanlan, Qin Shiqiao, Su Yong, Yang Yan |
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(Department of Applied Physics, NUDT, Changsha, 410073)
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| Abstract: |
| The method of DJ's VisuShrink denoising has been applied widely in degital signal processing. But the quality of the signal restored from noise is related to the parameter j0, the low-resolution cutoff, and that the selecting of j0 is related to the noise power σof a signal corrupted by an additive noise and the sampling rate of the signal. This article analyzes these relationships among these parameters and gives many simulation results. These results have significant meanings in selecting the parameter j0. |
| Keywords: wavelet denoising, waveform restoration, VisuShrink |
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