摘要
应用数字滤波器的理论和设计方法,在Matlab软件开发环境下分别通过脉冲响应不变法和双线性变换法设计出了无限长单位冲激响应(IIR)数字滤波器,并借助Matlab图形用户界面(GUI)设计了IIR数字滤波器人机交互界面,使得该系统平台界面简洁直观,操作方便且功能齐全,最终实现了对加有噪声语音信号的去噪处理。通过对比仿真结果表明:切比雪夫Ⅱ型低通滤波器对加有噪的语音去噪效果最佳。
By using the theory and design method of digital filter, the IIR digital filter is designed by impulse response method and bilinear transformation method in Matlab software development environment, and with the help ofMatlab GUI, the human-computer interaction interface of IIR digital filter is designed, the system interface is simple and intuitive, easy to be operated and complete function, and de-nosing process of voice signalisrealized.Comparingthe simulationresults, theresultsshowthat Chebyshev II typehasmuchmore functionofde-nosingprocessof voice signal.
出处
《中小企业管理与科技》
2017年第15期147-148,共2页
Management & Technology of SME
