Question

如何用matlab实现A律13折线量化函数y=sin(0.2πn)

Answer 1

close all

clear all

clc

n=-100:100;

y=sin(.2*pi*n);

% y2 = exp(y);

% V= max(y2);

y2 = y;

V= max(y2);

partitionV=(-15:15)/16*V;

codebookV=(-16:15)/16*V;

A=87.6;

compressedy2 = compand(y2,87.6,V,'a/compressor');

[index,quants] = quantiz(compressedy2,partitionV,codebookV);

reconstructedy = compand(quants,A,max(quants),'a/expander');

plot(n,y);

hold on

plot(n,reconstructedy,'r');