clear;
Winsiz=256;%幀長
Shift=128;%幀移
[xFs]=wavread（‘changdu.wav‘）;
%?len=length（x1）;
%?nois=0.001*rand（len1）;
%?x=x1+nois;
x=double（x）;
x=x/max（abs（x））;
%對信號做預加重處理
x=filter（[1?-0.9375]?1?x）;
nseg=floor（（length（x）-Winsiz）/Shift）+1;
A=zeros（Winsiz/2+1nseg）;

for?i=1:nseg
??n1=（i-1）*Shift+1;n2=n1+（Winsiz-1）;
??xx=x（n1:n2）;
??%求lpc系數
??[are]=lpcauto（xx）;
??%ar?=?LPC（xx12）;
??lpc=ar（2:13）;
??%求解lpc倒譜?
??lpcc（i:）=lpc2lpcc（lpc）;
end
[mn]=size（lpcc）;
C=mean（lpcc（2:30:））;%背景噪聲倒譜系數估計值
for?i=1:m
????s=0;
?????for?j=2:n
????????s=s+（lpcc（ij）-C（j））.^2;%計算倒譜距離
?????end
????????s=2*s+（lpcc（i1）-C（1））^2;
????dst（i）=4.3429*sqrt（s）;
end
dst=dst./max（dst）;
%--------------------------------------------------------
T1=0.013;
T2=0.012;
maxsilence=5;
minlen=10;
T1?=?min（T1?max（dst）/4）;
T2?=?min（T2?max（dst）/8）;
status=0;
count=0;
silence=0;
%開始端點檢測
x1?=?0;?
x2?=?0;
xn=1;
for?n=1:length（dst）?????????????%xn記錄連續語音中字的段數（幾個字）??
???switch?status
???case?{01}???????????????????%?0?=?靜音?1?=?可能開始
??????if?dst（n）?>?T1??????????%?確信進入語音段
?????????x1（xn）?=?max（n-count（xn）-11）;
?????????status??=?2;
?????????%silence（xn）?=?0;
?????????count（xn）???=?count（xn）?+?1;
??????elseif?dst（n）?>?T2??%?可能處于語音段
?????????status?=?1;
?????????count（xn）=count（xn）?+?1;
??????else???????????????????????%?靜音狀態
?????????status??=?0;
?????????count（xn）=0;
?????????silence（xn）=0;
?????????x1（xn）=0;
?????????x2（xn）=0;
??????end
???case?2???????????????????????%?2?=?語音段
??????if?dst（n）?>?T2?????%?保持在語音段
?????????count（xn）?=?count（xn）?+?1;
??????else???????????????????????%?語音將結束
?????????silence（xn）??=?silence（xn）?+1;
?????????if?silence（xn）?????????????count（xn）??=?count（xn）?+?1;
?????????elseif?count（xn）?????????????status??=?0;
????????????silence（xn）=0;?????????
?????????else????????????????????%?語音結束
????????????status??=?3;
?????????end
??????end
???case?3???????
????????status??=?0;??????????
????????xn=xn+1;?
????????count（xn）???=?0;
????????silence（xn）=0;
????????x1（xn）=0;
????????x2（xn）=0;
???end
end???

%--------------以下繪圖程序
frameInc=Shift;
count?=?count-silence./2;
x2?=?x1?+?count?-1;
subplot（211）;
plot（x）;
axis（[1?length（x）?-1?1]）;
ylabel（‘Speech‘）;
for（xn=1:length（x1））
line（[x1（xn）*frameInc?x1（xn）*frameInc][-1?1]‘Color‘‘red‘）;
line（[x2（xn）*frameInc?x2（xn）*frameInc][-1?1]‘Color‘‘green‘）;
end;

subplot（212）;
plot（dst）;
axis（[1?length（dst）?min（dst）?max（dst）]）;
ylabel（‘Cepstrum‘）;
for（xn=1:length（x1））
line（[x1（xn）?x1（xn）][min（dst）max（dst）]‘Color‘‘red‘）;
line（[x2（xn）?x2（xn）][min（dst）max（dst）]‘Color‘‘green‘）;
end;
%?Shanglevel=0.25;%選取適當閾值
%?windowsize=Winsiz;
%?overlap=Shift;
%?sound?=?[];
%?k=1;
%?%找到滿足閾值條件的下標索引值
%?soundIndex?=?find（dst（2:end）>=Shanglevel）;
%?sound（k）.begin?=?soundIndex（1）;
%?for?i=2:length（soundIndex）-2
%?	if?soundIndex（i+1）-soundIndex（i）>1?&&?soundIndex（i+2）-soundIndex（i+1）=

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件??????27098??2007-12-20?15:24??endpoint?detection\倒譜\changdu.wav

?????文件???????4192??2007-12-24?09:41??endpoint?detection\倒譜\daopu.asv

?????文件???????3986??2009-04-20?09:14??endpoint?detection\倒譜\daopu.m

?????文件????????991??2007-12-19?09:41??endpoint?detection\倒譜\lpc2lpcc.asv

?????文件????????941??2007-12-19?16:51??endpoint?detection\倒譜\lpc2lpcc.m

?????文件???????2918??2007-12-17?09:30??endpoint?detection\倒譜\lpcauto.asv

?????文件???????2031??2007-12-17?09:38??endpoint?detection\倒譜\lpcauto.m

?????文件??????17642??2007-12-19?09:35??endpoint?detection\倒譜\r2.wav

?????文件??????15644??2007-12-19?18:42??endpoint?detection\倒譜\t1.wav

?????文件?????158838??2007-12-20?15:58??endpoint?detection\倒譜\test.wav

?????文件????????139??2007-12-21?16:29??endpoint?detection\倒譜\說明.txt

?????文件??????27098??2007-12-20?15:24??endpoint?detection\分形\changdu.wav

?????文件????????485??2007-12-19?19:56??endpoint?detection\分形\corr_integral.m

?????文件???????2891??2009-04-21?11:51??endpoint?detection\分形\fenxingtest.m

?????文件???????1508??2007-12-24?16:29??endpoint?detection\分形\FractalDim.m

?????文件????????980??2007-12-19?20:01??endpoint?detection\分形\GP_CD.m

?????文件????????286??2007-12-19?19:36??endpoint?detection\分形\heaviside.m

?????文件??????56622??1997-05-06?23:54??endpoint?detection\分形\kdt_003.wav

?????文件??????33938??2009-03-23?14:57??endpoint?detection\分形\s1.wav

?????文件?????158838??2007-12-20?15:58??endpoint?detection\分形\test.wav

?????文件??????25088??2007-12-26?16:17??endpoint?detection\說明.doc

?????文件??????27098??2007-12-20?15:24??endpoint?detection\譜熵\changdu.wav

?????文件???????4450??2007-12-24?21:01??endpoint?detection\譜熵\pushang.asv

?????文件???????3103??2007-12-26?16:31??endpoint?detection\譜熵\pushang.m

?????文件??????17642??2007-12-19?09:35??endpoint?detection\譜熵\r2.wav

?????文件??????15644??2007-12-19?18:42??endpoint?detection\譜熵\t1.wav

?????文件?????158838??2007-12-20?15:58??endpoint?detection\譜熵\test.wav

?????文件????????107??2007-12-24?10:45??endpoint?detection\譜熵\說明.txt

?????目錄??????????0??2009-04-20?09:02??endpoint?detection\倒譜

?????目錄??????????0??2009-04-21?10:24??endpoint?detection\分形

............此處省略5個文件信息