语音信号处理系统设计

The Design of Processing Voice Signal

本文简要介绍了语音信号采集与分析以及语音信号的特征、采集与分析方法,并在采集语音信号后,在Matlab软件平台上进行频谱分析,然后对所采集的语音信号加入干扰噪声,对加入噪声的信号进行频谱分析,设计合适的滤波器滤除噪声,恢复原信号。利用Matlab来读入(采集)语音信号,将它赋值给某一向量,再将该向量看作一个普通的信号,对其进行FFT(Fast Fourier transform)变换实现频谱分析,再依据实际情况对它进行滤波,然后我们还可以通过sound命令来对语音信号进行回放,以便在听觉上来感受声音的变化。

This article briefly introduced in this paper voice signal acquisition and analysis and the characteristics of speech signal,collection and analysis method of,and after the voice signal acquisition,on the platform of Matlab software for spectral analysis and on the acquisition of the speech signal with the interference noise,to join the noise signal spectrum analysis,design a suitable filter to filter out the noise and restore the original signal.Using Matlab to read(acquisition)of speech signal,will assign it to a vector,the vector as a common signal,the of FFT spectrum analysis,again according to the actual situation of filtering it.Then we can through the sound commands to the speech signal playback,in order to auditory up feeling sound changes.