语音信号的降噪研究

Study on noise reduction of speech signal

详细介绍了语音信号基于小波阈值法和EMD阈值的噪声抑制在MATLAB上具体实现步骤,在阈值函数的问题上,针对硬阈值和软阈值函数的缺点和不足,采用了改进的阈值函数,并对两种方法在去噪结果上进行比较,总结了新阈值函数在处理语音方面存在的优势和不足。

This paper introduced the concrete steps of speech signal de-noise in wavelet threshold method and EMD based on MATLAB, adopted a modified threshold function to process speech signal in view of the shortcomings and deficiens of the hard threshold and soft threshold function, and compared two methods in denoising, summed up the advantages and disadvantages of the new threshold function exists in the speech processing.