【2017年整理】基于matlab的音频信号处理毕业设计(含源文件).doc

毕业设计 题目：基于matlab的音频信号处理 专业：　电子信息工程 　　　 学号： 　　 　 作者：　 　 指导教师(职称)： 基于MATLAB的语音信号处理 【摘　要】 Matlab语音信号处理是指利用matlab软件对音频信号进行读取，并对音频信号进行采样分析及离散傅里叶变换，以方便对其在频域上进行调制滤波等相关的操作。本次实验在提取音频信号后会对该信号使用在MATLAB软件中设计的滤波器进行滤波，并观察其效果，验证滤波器是否可行。 本次使用了MATLAB软件，综合运用GUI界面设计、各种函数调用等来实现音频信号的傅里叶变换及滤波，程序界面简练，操作简便，具有一定的实际应用意义。软件中自带的信号处理与分析工具箱为语音信号分析实验提供了丰富的功能函数，利用这些功能函数可以快捷而又方便地完成语音信号的处理和分析以及信号的可视化。信号处理是MATLAB重要应用的领域之一。 【关键词】 matlab 语音信号处理 数字滤波器 傅里叶变换 Based on MATLAB of the signal processing Audio processing?design 【Abstract】: The contents of the research is?to filter the?signal?noise?with using MATLAB software. signal processing is to study the use of digital signal processing technology and knowledge of the voice signal voice processing of the emerging discipline is the fastest growing areas of information science one of the core technology. Transmission of information through the voice of humanitys most important, most effective and most convenient form of exchange of information. MATLAB is a Professional?Computing Software based on?the mathematical function?.Through?into the?MATLAB software?can audio?signal frequency?synthesis and decomposition. Also?can be processed?in more detail?the audio file?to use it,?such as increasing the?frequency and amplitude?of audio files?it?can also add?to specify the content?of?the audio file?noise signal. The experiment?will be?through?digital?MATLAB filter design?to deal with the audio in which be polluted ,after it ,The system will draws two waveform picture:before filtering and after filtering. And through these?pictures to?observe?the filtering effect of the filter. Mathematical function?designed in this paper?are:?the fast fourier transform,the method of window function,?the bilinear transformation method. And in this process it also include use GUI interface design window. Finally the voice signal processing will be