期刊论文

中文

计算机工程与应用

1002-8331

2009

45

23

154-157

10.3778/j.issn.1002-8331.2009.23.043

湖南省自然科学基金（the Natural Science Foundation of Hunan Province of China under Grant No.06JJ50118） 衡阳师范学院青年骨干教师资助项目.

本校为第一机构

将小波变换的理论引入到自适应语音消噪系统中,分析了多尺度小波分解下的LMS自适应消噪算法(MSWD-LMS)的原理,该算法将输入向量分解到多尺度空间,减小了自适应滤波器输入向量自相关矩阵的谱动态范围;将变步长LMS算法与多尺度小波变换的思想结合,提出了一种新的小渡自适应语音消噪算法(MSWD-VSS-LMS),新算法既减少了输入向量自相关矩阵条件数,又克服了固定步长LMS算法在收敛速度与收敛精度方面与步长因子μ的矛盾,获得了更好的语音信号处理的收敛速度和稳定性.仿真结果表明新算法取得了较好的效果.

The wavelet transfotan theory is introduced into the adaptive speech signal noise cancellation system.The principle of LMS adaptive speech signal noise cancellation algorithm with multiple-scale wavelet decomposition is analyzed.The MSWD-LMS algorithm converges faster than the elassical LMS algorithm,and the spectrum dynamic range of auto-correlation matrix of the input vector which is decomposed to multiple-scale space is deereased.The variable step size LMS algorithm and the multiplescale wavelet decomposition are merged into the adaptive spe...