clear all
 for i=1:30
   fname=sprintf('D:\\study\\音頻采樣\\speechwithmusic22050\\%d.wav',i);
   x=wavread(fname);
   x=x(:,1);
   [c,l]=wavedec(x,3,'db4');
   ca=appcoef(c,l,'db4',3);%近似系數
   x=ca;
   enframex=enframe(x,128,64);%對信號x分幀處理，每幀有128個采樣點，相鄰幀之間有50%的疊加率
   [row,col]=size(enframex);%返回行，列，每一行代表一幀，每一列表示1到128個采樣點
   A=abs(enframex).^2;
   energy=zeros(row,1);
   for j=1:row
     energy(j)=sum(A(j,:));
   end
   for j=1:row
     s(j)=0;
     s(j)=s(j)+energy(j).*log10(energy(j));
   end
   Err=-s;swm(i)=0;
   for k=1:row
       if Err(1,k)<=(-50)
          swm(i)=swm(i)+1;
       end
   end
   swmshangbi(1,i)=swm(i)/row;
  end
   swmshangbi


clear
for i=1:30
   fname=sprintf('D:\\study\\音頻采樣\\speech22050hz\\%d.wav',i);
   x=wavread(fname);
   x=x(:,1);
   [c,l]=wavedec(x,3,'db4');
   ca=appcoef(c,l,'db4',3);%近似系數
   x=ca;
   enframex=enframe(x,128,64);%對信號x分幀處理，每幀有128個采樣點，相鄰幀之間有50%的疊加率
   [row,col]=size(enframex);%返回行，列，每一行代表一幀，每一列表示1到128個采樣點
   A=abs(enframex).^2;
   energy=zeros(row,1);
   for j=1:row
     energy(j)=sum(A(j,:));
   end
   for j=1:row
     s(j)=0;
     s(j)=s(j)+energy(j).*log10(energy(j));
   end
   Err=-s;speech(i)=0;
   for k=1:row
       if Err(1,k)<=(-50)
          speech(i)=speech(i)+1;
       end
   end
   speechshangbi(1,i)=speech(i)/row;
  end
   speechshangbi

clear
for i=1:30
   fname=sprintf('D:\\study\\音頻采樣\\music22050hz\\%d.wav',i);
   x=wavread(fname);
   x=x(:,1);
   [c,l]=wavedec(x,3,'db4');
   ca=appcoef(c,l,'db4',3);%近似系數
   x=ca;
   enframex=enframe(x,128,64);%對信號x分幀處理，每幀有128個采樣點，相鄰幀之間有50%的疊加率
   [row,col]=size(enframex);%返回行，列，每一行代表一幀，每一列表示1到128個采樣點
   A=abs(enframex).^2;
   energy=zeros(row,1);
   for j=1:row
     energy(j)=sum(A(j,:));
   end
   for j=1:row
     s(j)=0;
     s(j)=s(j)+energy(j).*log10(energy(j));
   end
   Err=-s;music(i)=0;
   for k=1:row
       if Err(1,k)<=(-50)
          music(i)=music(i)+1;
       end
   end
   musicshangbi(1,i)=music(i)/row;
  end
   musicshangbi