jieyasuo.m

语音PCM编码

function  y=jieyasuo(x) %function y=lianghua(x)  
   %要用         x=x/max(x);
z=sign(x);
x=abs(x);
for i=1:length(x);
   if((x(i)>=0)&(x(i)<1/4))
        y(i)=x(i)/16;
     else if (x(i)>=1/4&x(i)<3/8)
           y(i)=x(i)/8-1/64;
               else if (x(i)>=3/8&x(i)<4/8)
                  y(i)=x(i)/4-1/16;
                     else if (x(i)>=4/8&x(i)<5/8)
                           y(i)=x(i)/2-3/16;
                              else if (x(i)>=5/8&x(i)<6/8)
                                    y(i)=x(i)-4/8;
                                       else if (x(i)>=6/8&x(i)<7/8)
                                             y(i)=2*x(i)-5/4;
                                                else if (x(i)>=7/8&x(i)<=1)
                                                      y(i)=4*x(i)-3;
                                                   end;end;end;end;end;end;end;end;
                                                                        y=z.*y'*y(1)*64;