摘要
提出一种改进的语音去噪处理方法:二次小波分解全局阈值法。该方法不同于传统阈值滤波方法,首先对语音信号的高频部分进行二次分解,然后应用阈值滤波的方法对信号进行去噪处理。该方法在MATLAB上进行了模拟实验,实验结果表明该方法提高了信噪比,去除了大部分噪声,相当完整地保留了有效信号能量,很好地解决噪声对语音信号干扰的问题。
An improved method of speech denoising processing is put forward：Second-decomposition wavelet global threshold.This method is different from the traditional threshold filtering.First,it decomposes high frequency twice,and then denoises the signal by threshold filtering.Simulated test is made on MATLAB.Test results show that the algorithm improves signal to noise ratio,and wipes off the most noise with full effective energy.The interference problem of noise signal is absolutely solved.
出处
《计算机工程与应用》
CSCD
北大核心
2009年第36期145-147,173,共4页
Computer Engineering and Applications
基金
河北省自然科学基金No.F200700011
河北省教育厅基金项目No.2007315~~
关键词
小波变换
语音去噪
阈值滤波
wavelet transform speech denoising threshold filtering
