close all 
clear all
echo on
a=randn(1,500);%信號樣本序列 
n=64;
[sqnr,a_quan,code]=u_pcm(a,64);
pause %按任意鍵可看到信號量化噪聲比
sqnr  
pause %按任意鍵可看到前5個(gè)輸入值 
a(1:5)
pause %按任意鍵可看到前5個(gè)量化值 
a_quan(1:5)
pause %按任意鍵可看到前5個(gè)量化值對應(yīng)的編碼
code(1:5,:)