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Improvement of the Wavelet Threshold Filtering Algorithm Applied to Audio Signals
Author(s): 
Pages: 71-74,80
Year: Issue:  2
Journal: Audio Engineering

Keyword:  小波域阈值滤波算法改进音频信号自适应取值非平稳性;
Abstract: 在对音频信号进行去噪处理时,要应用具有时频转换分析能力的小波变换.在Donoho提出的小波域阈值算法的基础上,针对选取阈值时并未考虑分解尺度造成滤波效果差这一缺点,提出了一种基于分解尺度来确定阈值并根据相邻高频系数图的比较来确定最优分解尺度的改进算法.经过实际信号的仿真表明,改进后的算法可以有效地去除噪声干扰,在信噪比上也明显优于原算法.
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