基于Matlab的音频文件数字滤波处理  

Dealing with Audio Frequency File by Figure Filter Based on Matlab

作　　者：张康[1] 刘雅[1] 

机构地区：[1]江西中医学院计算机系,江西南昌330004

出　　处：《计算机与现代化》2007年第12期98-100,共3页Computer and Modernization

摘　　要：声音信号是一维连续信号,而计算机只能处理离散信号。为了从离散信号还原连续信号,根据采样定理,可以确定采样频率的最小值。wav文件是一种数字声音文件格式,本文基于Matlab分析了wav声音文件频谱与声音的关系。通过一个数字滤波实例,处理一个带有盲音的wav文件,去除其中的噪声,并给出了不同采样频率对输出声音信号的影响。Sound semaphore is one dimension concatenation signal, however computer only can process data by discrete signal. By way of revert concatenation signal from discrete signal, according to the sampling theorem, it can confirm sampling frequency＇ s least value. Wav file is a kind of figure sound file format. This paper analyses the relationship of wav sound file frequency chart between sounds based on Matlab. By giving an example of figure filter, dealing with awav file with blinding sound, wiping off the noise and giving different sampling frequency reply export sound signal＇s effect.

关 键 词：数字信号处理 数字滤波 MATLAB WAV 

分 类 号：TP391.42[自动化与计算机技术—计算机应用技术]