基于Labview的语音信号处理设计

基于Labview的语音信号处理设计(论文11000字)
摘要：语音信号是生活中最为常见的信息，但是极易容易受到外界环境的干扰，从而对信号本身产生一定的影响，使得语音信号中有用的信息变得难以发现和辨认。语音信号处理实质上是研究如何用数字信号处理技术对语音信号进行处理，处理的目的是得到某些参数以便高效传输和存储已有的语音信号；或者应用于语音的识别和人工合成等。本设计系统是采用声卡对语音信号进行采集，再将采集到的信号进行存储并对存储的信号进行分析。所用软件为LabVIEW，通过LabVIEW自带的控件和框架对声音进行信号采集与声音信息保存，并利用LabVIEW自身强大的信号处理能力进行信号分析处理，其中包括有对语音信号进行端点检测、滤波、加窗等预处理和对处理后的声音信号进行时域和频域的分析，并根据得到的信息对两段声音做简单的识别匹配。
关键词：LabVIEW；声卡；信号采集；滤波；信号分析；G语言

Speech Signal Processing Based on LabVIEW
Abstract: Speech signal is the most common information in life, but it is easy to be disturbed easily by the external environment, which has a certain influence on the signal itself, making the useful information in the speech signal difficult to find and identify. Speech signal processing is essentially a study of how to use digital signal processing technology to process speech signals. The purpose of processing is to obtain some parameters in order to efficiently transmit and store the existing voice signals, or to be applied to speech recognition and artificial synthesis. The design system uses sound card to collect voice signals, then stores the collected signals and analyzes the stored signals. The software is LabVIEW, and the sound is collected and stored by the control and frame of LabVIEW. The signal is processed by the powerful signal processing ability of LabVIEW itself, including the endpoint detection, filtering, window preprocessing and the sound signal after the processing of the voice signal. The time domain and frequency domain are analyzed, and the simple recognition and matching of the two segments of sound are made according to the information obtained.
Key words: LabVIEW；sound card；signal acquisition；filtering；signal analysis; G language

目 录
1.绪论    1
1.1语音信号处理发展现状和趋势    1
1.1.1 语音识别    1
1.1.2 语音合成    1
1.1.3 语音编码    1
1.2仿真平台LabVIEW    2
2.系统设计    4
2.1 信号采集与存储    4
2.2 信号的处理    5
2.3 信号的分析    6
3.实验测试    8
3.1 程序实现    8
3.2 基本应用    11
4.工作总结和未来展望    12
4.1 工作总结    12
4.2 未来展望    12
参考文献    13
致谢    15