Guruh talabasi Tohirov Akobir 3- labaratoriya ishi. Mavzu


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SRIB.3-laboratoriya


211-17- guruh talabasi Tohirov Akobir

3- labaratoriya ishi.

Mavzu: Raqamli signallarning parametrlarini hisoblash.

Nazariy qism.



Raqamli signallar agalog signallarni muayyan t vaqt yoki boshqa x ko‘rsatkich oralig‘ida signalning amplituda qiymatlarini diskretlash va ketma-ket kvantlashdan hosil bo‘ladi.

Tovush signallarni diskretlash chastotasi:



  • 8 000 Gs — telefon, nutq uchun yetarli;

  • 11 025 Gs;

  • 16 000 Gs;

  • 22 050 Gs — radio;

  • 32 000 Gs;

  • 44 100 Gs — Audio CD;

  • 48 000 Gs — DVD, DAT;

  • 96 000 Gs — DVD-Audio (MLP 5.1);

  • 192 000 Gs — DVD-Audio (MLP 2.0);

  1. Signal energiyasi

2. Nollar soni Z



bu yerda




dastur:

%%Meliboyeva Dilshoda

%% Signalni o'qib olish

[ s fs ]=wavread('Meliboyeva.wav');

%%subplot(1,2,1);

plot(s);


title('Signal');

grid on;


hold on;

%% Signal energiyasi (E)

for k=1:size(s)

E = sum(s(k)*s(k));

end

E = E./k;



%% Signalning max nuqtasi

max_s=0;


for k=1:size(s)

if(max_s < s(k))

max_s = s(k);

end


end

%% Signalning min nuqtasi

min_s=0;

for k = 1:size(s)

if(min_s > s(k))

min_s = s(k);

end

end


%%Signalning Z soni
for k=2:size(s)

if (s(k)>=0)

s(k)=1;

else


if(s(k)<0)

s(k)=-1;


Z=sum(abs(s(k)-s(k-1)));

end


Z=Z/2;

end


end



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