lianghua.m

PCM（脉冲编码调制

function y=lianghua(x)
t=max(x);
x=x/t;  %归一化
x(1)=t/64;  %将最大值等分为1/(2^6)
z=sign(x);
x=abs(x);
for i=1:length(x);
    if((x(i)>=0)&(x(i)<1/64))
        y(i)=16*x(i);
    else if (x(i)>=1/64&x(i)<1/32)
            y(i)=8*x(i)+1/8;
        else if (x(i)>=1/32&x(i)<1/16)
                y(i)=4*x(i)+1/4;
            else if (x(i)>=1/16&x(i)<1/8)
                    y(i)=2*x(i)+3/8;
                else if (x(i)>=1/8&x(i)<1/4)
                        y(i)=x(i)+4/8;
                    else if (x(i)>=1/4&x(i)<1/2)
                            y(i)=1/2*x(i)+5/8;
                        else if (x(i)>=1/2&x(i)<=1)
                                y(i)=1/4*x(i)+6/8;
                            end;
                        end;
                    end;
                end;
            end;
        end;
    end;
end;
y=z.*y';