matlab语音加入正弦噪声,基于Matlab的语音信号去噪声处理 毕业论文.doc

基于Matlab的语音信号去噪声处理 毕业论文

本科毕业论文(设计)

题目：基于Matlab的语音信号去噪声处理

姓 名：

学 号： 1142051102

专 业： 电子信息工程

院 系： 电子通信工程

指导老师：

职称学位： 硕士

完成时间：

教务处制

安徽新华学院本科毕业论文(设计)独创承诺书

本人按照毕业论文(设计)进度计划积极开展实验(调查)研究活动，实事求是地做好实验(调查)记录，所呈交的毕业论文(设计)是我个人在导师指导下进行的研究工作及取得的研究成果。据我所知，除文中特别加以标注引用参考文献资料外，论文(设计)中所有数据均为自己研究成果，不包含其他人已经发表或撰写过的研究成果。与我一同工作的同志对本研究所做的工作已在论文中作了明确说明并表示谢意。

毕业论文(设计)作者签名：

日期： Voice signal occupies an extremely important position in digital signal processing, so the selection based on the research of the speech signal to consolidate and master the basic ability of digital signal processing is very representative. For digital signal processing (DSP) is dependent on the filter, so filter design occupies an extremely important role in signal processing. FIR digital filter and IIR filter is an important part of the filter design. MATLAB signal processing toolbox can be used to quickly and efficiently design all kinds of digital filter. Powerful and easy to learn, programming, high efficiency, is popular among the masses of scientific and technical workers. We can tear down the corresponding conclusion through theoretical derivation, using MATLAB as a programming tool for computer to add noise speech signal in time domain, frequency domain analysis and filtering. In the process of design implementation, we use window function method to design FIR digital filter, butterworth, chebyshev and bilinear reform IIR digital filter design, and the MATLAB as an auxiliary tool to complete the design of computing and graphics drawing and simulation.

Keywords:filter MATLAB Window function method double linear transformation

目录

摘要2

Abstract3

目录4

1．绪论5

1.1研究的目的和意义7

1.2本课题的研究内容7

1.3 其大概流程框图可如下表示8

2.原始语音信号采集与处理9

2.1 Matlab简单介绍9

2.2 语音信号的采样理论依据9

2.2.1采样的基本概念9

2.3语音信号的采集11

2.4语音信号的时频分析12

2.5语音信号加噪与频