wucha.m

matlab程序

close all
clear all
echo off
i=1:500;
a=randn(1,500);%

[sqnr,a_quan,code]=u_pcm(a,8);%
f=a-a_quan;                 %
subplot(3,1,1);
axis([0 500 -1 1]);
plot(i,f,'-');
title('量化误差,从上到下量化级数分别为8,16,64')

[sqnr,a_quan,code]=u_pcm(a,16);%
f=a-a_quan;                 %
subplot(3,1,2);
axis([0 500 -1 1]);
plot(i,f,'-');


[sqnr,a_quan,code]=u_pcm(a,64);
f=a-a_quan;                 %
subplot(3,1,3);
axis([0 500 -1 1]);
plot(i,f,'-');