基于虚拟仪器技术的双通道语音分析系统的设计

针对语音信号的特点,采用主流虚拟仪器开发软件——LabVIEw8.0开发出双通道语音分析系统,该系统既可满足对动态语音信号进行高精度、高频率采样的要求,也可对每个通道的动态输入范围进行单独设置,以保证量化噪声对动态范围不同的信号的影响尽可能保持一致。本系统采用ActiveX技术实现了与数值分析软件matlab6.5的连接,利用matlab中小波工具包对采集的语音信号的进行噪声滤除等处理,整个系统人机界面友好、结果直观、并且通过改进程序可以扩展系统的功能。

Design of Dual Channel Speech Analysis System Based on Virtual Instrument Technology

Based on the characters of speech signal and by using mainstream virtual instrument a dual channel speech analysis system is developed.The proposed system can satisfy the request to acquire dynamic speech signal with high accuracy and high sampling frequency.The input dynamic range can be set independently for each channel. So as to ensure that the noise has the almost same impact to signal within different dynamic range.Interface to numerical software Matlab6.5 based on Active X is also provided, so this system can eliminate the noise in the speech signal by wavelet toolkit in Matlab. The whole system is friendly in user interface,result intuitively and easy to update by improving program.