1、 兰州工业学院 毕业设计(论文) 题目 基于数字滤波器的语音转换 系 别 电子信息工程系 专 业 电子信息工程技术 班 级 电信 10-2 班 姓 名 李国平 学 号 201010101209 指导教师(职称) 马宏锋(教授) 日 期 2013 年 3 月 摘 要 语音信号处理是研究用数字信号处理技术和语音学知识对语音信号进行处理的新兴的学科,是目前发展最为迅速的信息科学研究领域的核心技术之一。通过语音传递信息是人类最重要、最有效、最常用和最方便的交换信息形式。 Matlab 语言是一种数据分析和处理功能十分强大的计算机应用软件,它可以将声音文件变换为离散的数据文件,然后利用其强大的矩阵运算能
2、力处理数据,如数字滤波、傅里叶变换、时域和频域分析、声音回放以及各种图的呈现等,它的信号处理与分析工具箱为语音信号分析 提供了十分丰富的功能函数,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,使人机交互更加便捷。信号处理是 Matlab 重要应用的领域之一。 本设计针对现在大部分语音处理软件内容繁多、操作不便等问题,采用MATLAB7.0 综合运用 GUI 界面设计、各种函数调用等来实现语音信号的变频、变幅、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。 关键字 : Matlab 语音信号 傅里叶变换 信号处理 语音转换 Abstract Sp
3、eech signal processing is carried out by using digital signal processing technology and phonetics knowledge on speech signal processing of the emerging discipline, is the most rapid development of the information science research in the field of one of the core technology. Through the phonetic trans
4、fer information is the most important and the most effective, most commonly used and the most convenient exchange information form. Matlab language is a kind of data analysis and processing functions very powerful computer application software, it can sound file conversion for discrete data file, an
5、d then use its powerful matrix operation capability to deal with data, such as digital filter, Fourier transform, time domain and frequency domain analysis, sound playback and various map present, its signal processing and analysis tools for speech signal analysis provides a very rich functions, use
6、 these functions can be quickly and easily complete speech signal processing and analysis and signal visualization, human-computer interaction more convenient. Matlab signal processing is an important application field in. This design for now most speech processing software of content, operating inc
7、onvenience, the integrated use MATLAB7.0 GUI interface design, all kinds of function calls to realize voice signal frequency, amplitude, Fourier transform and filtering, the program interface simple, the operation is simple, have certain practical application significance. Keywords: Matlab speech signal Fourier transform signal processing Voice Conversion