e=[];
m=[];
c=[];
w=[];
[xfs]?=?wavread（‘E:\大三下\作業(yè)\語音\008_km.wav‘）;
%pre?=?[1?-0.97];
%x?=?filter（pre1x）;
fnlen=round（0.03*fs）;?????????????????%?20ms
noverlap=round（0.5*fnlen）;
win=hamming（fnlen）;??????%?win?is?window?function
win2=hamming（fnlen-1）;?
n=fnlen
while?n<=length（x）-1
????fx=x（n-fnlen+1:n）.*win;???????
????e=[e?sum（fx.^2）];
????fm=abs（x（n-fnlen+1:n））.*win;?
????m=[m?sum（fm）];
????for??i=round（n-fnlen+1）:round（n-1）
????????if?x（i）>=0
????????????b（i）=1;
????????el