基于MATLAB的音频信号综合分析处理

利用MATLAB软件建立一套完整的综合分析处理方法.实现对音频信号的采集与保存,不同性别音频信号的傅里叶变换与频谱分析,调用滤波器工具对音频信号进行滤波,对音频信号的播放进行增强、衰减、加速、减速、反转、回声效果模拟,为音频信号添方波信号并进行频谱分析,为音频信号添加正弦波信号并进行频谱分析,对音频设置密码,用MATLAB建立文本文档,利用语音识别对文本文档进行加密.首先编写一个完整的程序代码,实现上述所有功能.然后以总代码为基础,利用MATLAB编写7个新函数,7个新函数可单独调用,对应上述功能.将7个新函数添加到MATLAB函数搜索路径,然后通过调用,实现对一段音频信号的综合分析、加密处理与语音识别.

The Comprehensive Analysis and Processing of the Audio Signal in the MATLAB. Computer Engineering and Applications

Abstract： Using the MATLAB software, A set of audio signal processing program is established, The fol- lowing functions are realized, including： acquisition and preservation of the audio signal, fourier transform and spectrum analysis for audio signal of different genders, invoking the filter function to realize Lowpass filtering, realize enhancement, attenuation, acceleration, inversion, the effect of echo simulation of the voice signal, adding square wave signal to the audio signal and carrying on spectrum analysis, adding Sine wave signal to the audio signal and carrying on spectrum analysis, encrypting the audio signal, using MATLAB to create a text document, using audio signal to encrypt a text documents. In the practice, first- ly writing a complete program code to realize all of the above functions. Then, using matlab to build new functions. Based on the total code, seven new function subroutines are set up, respectively , New func- tions can be invoked independently, thus realize the comprehensive analysis and processing of an audio signal