DCpcm.asv

clc;
close all;
clear all;
n=input('enter n value for n-bit PCM system:');
n1=input('enter number of samples in a period');
L=2^n;
x=0:2*pi/n1:4*pi;
s=8*sin(x);
subplot(3,1,1);
plot(s);
title('analaog signal');
ylabel('amplitude--->');
xlabel('time--->');
subplot(3,1,2);
stem(s);
grid on;
title('sampled signal');
ylabel('amplitude--->');
xlabel('time--->');

vmax=8;
vmin=-vmax;
del=(vmax-vmin)/L;
part=vmin:del:vmax;
code=vmin-(del/2):del:vmax+(del/2);
[ind,q]=quantiz(s,part,code);
l1=length(ind);
l2=length(q);

for i=1:l1
    if(ind(i)==0)
        ind(i)=ind(i)-1;
    end
    i=i+1;
end

for i=1:l2
    if(q(i)==vmin-(del/2))
        q(i)=vmin+(del/2);
    end
end
subplot(3,1,3);
stem(q);
grid on;
title('quantized signal');
ylabel('amplitude--->');
xlabel('time--->');

figure
code=de2bi