clear;
clc;
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%??語音信號??%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
[Yfsbits]=wavread（‘yuyin.wav‘）?%讀出信號1，采樣率和采樣位數
sound（Yfsbits）;
N=40000;
%?tt=[0.1:0.1:10];
t0=1/fs;
t=[t0:t0:N*t0];
df=fs/256;
f=[df:df:256*df];
x=Y（1:N）;
xf=fft（x）;?%1024為數據點數，即對信號采樣數據為1024點的處理
xf=fftshift（xf）;
subplot（211）;
plot（tx）;
title（‘語音信號時域波形圖‘）;
subplot（212）;
plot（abs（xf））;
xlabel（‘頻率/Hz‘）;
ylabel（‘振幅‘）;
title（‘語音信號的頻域圖‘）;
delta=1/（255*16）;
start_value=[01/2553/2557/25515/25531/25563/255127/255];????
%?start_level=[0?16*delta?48*delta?112*delta?240*delta?496*delta?1008*delta?2032*delta];
interval=[delta2*delta4*delta8*delta16*delta32*delta64*delta128*delta];
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%μ律及μ律15折線%%%%%%%%%%%%%%%%%%

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????文件????????4903??2013-11-17?12:13??pcmuu.m