文章摘要
田玉静,左红伟.小波消噪阈值算法优化[J].声学技术,2009,(4):503~506
小波消噪阈值算法优化
Optimization threshold algorithm of wavelet de-noising
投稿时间:2008-11-02  修订日期:2009-03-17
DOI:
中文关键词: 小波阈值消噪  阈值算法  优化算法  阈值函数
英文关键词: wavelet threshold de-noising  threshold algorithm  optimization algorithm  threshold function
基金项目:
作者单位E-mail
田玉静 青岛理工大学现代教育技术中心, 青岛, 266033 tyj@qtech.edu.cn 
左红伟 青岛理工大学土木工程学院, 青岛, 266033  
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中文摘要:
      在研究小波固定阈值消噪方法,讨论阈值估计经验公式的基础上,针对加性噪声小波变换后的统计特征,提出了一种自适应阈值优化算法,该算法可以较准确地估计噪声水平,在消噪的同时保留语音信号中的弱特征成分。通过仿真实验验证,优化算法较传统算法能够更加有效地消除语音噪声,获得最大信噪比。
英文摘要:
      An adaptive optimization threshold algorithm is presented based on the experiential wavelet threshold expressions after the classical wavelet threshold de-noising methods are studied. According to the statistical characteristics of the wavelet noise, the scales of noise threshold are estimated exactly with the optimization algorithm, the weak features of speech signal can be preserved effectively and the noise is eliminated adequately at the same time. The simulation result shows a better effect of the optimization algorithm on noise reduction than the conventional algorithm, and an optimal signal to noise ratio could be obtained.
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