语音信号处理与分析及MATLAB实现.doc
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目 录
目 录....................................................................................................................................................1
摘要.....................................................................................................................................................2
第一章 绪论........................................................................................................................................3
1.1 语音课设的意义...................................................................................................................3
1.2 语音课设的目的及要求.......................................................................................................3
1.3 语音课设基本步骤...............................................................................................................3
第二章 设计方案论证........................................................................................................................4
2.1 设计理论依据.......................................................................................................................4
2.1.1 采样定理....................................................................................................................4
2.1.2 采样频率....................................................................................................................5
2.1.3 采样位数与采样频率................................................................................................5
2.2 语音信号的分析及处理方法...............................................................................................6
2.2.1 语音的录入与打开....................................................................................................6
2.2.2 时域信号的 FFT 分析...............................................................................................6
2.2.3 数字滤波器设计原理................................................................................................7
2.2.4 数字滤波器的设计步骤............................................................................................7
2.2.5 IIR 滤波器与 FIR 滤波器的性能比较.....................................................................7
第三章 图形用户界面设计................................................................................................................8
3.1 图形用户界面概念...............................................................................................................8
3.2 图形用户界面设计...............................................................................................................8
3.3 图形用户界面模块调试.......................................................................................................9
3.3.1 语音信号的读入与打开............................................................................................9
3.3.2 语音信号的定点分析..............................................................................................10
3.3.3 N 阶高通滤波器......................................................................................................11
3.3.4 N 阶低通滤波器......................................................................................................12
3.3.5 2N 阶带通滤波器....................................................................................................13
3.3.6 2N 阶带阻滤波器....................................................................................................15
3.4 图形用户界面制作.............................................................................................................16
第四章 总结......................................................................................................................................18
附录...................................................................................................................................................19
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