基于MATLAB的语音信号数字滤波处理  

Speech Signal Processing by Digital Filter Based on MATLAB

作　　者：周玲[1] 

机构地区：[1]运城学院物理与电子工程系,山西运城044000

出　　处：《安庆师范学院学报（自然科学版）》2011年第3期46-49,共4页Journal of Anqing Teachers College(Natural Science Edition)

摘　　要：对录制的语音信号进行采样,分析其时域波形和频谱图。给定数字滤波器的性能指标,采用窗函数法和双线性变换法设计数字滤波器,并对语音信号进行滤波,得到滤波前后的信号幅频响应。通过对比两种滤波处理结果,简单而有效地论证了两种数字滤波器在语音信号处理上的优势。Time-domain waveform and frequency spectrum of the recorded speech signals are analyzed by sampling.The performance indexes of digital filters are given.Two methods of window function and bilinear transformation are used to design the digital filters.The speech signal is filtered by the filters,and then magnitude-frequency responses of the signal before and after filtering are received.The advantages of two digital filters in speech signal processing are demonstrated by comparing different methods for filtering simply and effectively.

关 键 词：MATLAB 数字滤波器 语音信号 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]