from
Isolated Words Speech Recognition
by J. TRAN TAT
Basic program to recognize a word based on the analysis of its energy.
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%liste des carts aux rfrences
ecarts=[];
%longueur du signal
L=t*Fe;
%enregistrement
rec=wavrecord(t*Fe,Fe);
%passe haut - frequence de coupure 50Hz
%[b,a] = butter(9,50/(Fe/2),'high');
%rec2=filter(b,a,rec);
%fft
NFFT = 2^nextpow2(L); %puissance de 2 pour optimiser fft
ffrec=fft(rec,NFFT);
ffrec=ffrec(1:t*Fe/2);
power=ffrec.*conj(ffrec);
%maxima
maximum=max(power);
[pics,indices]=findpeaks(power,'minpeakdistance',25,'sortstr','descend');
%classer frequences
indices=sort(indices);
%1er ecart
match=[];
%%moyenne des ecarts
for i=1:7
match = [match abs(sons0(1,i)-indices(i))];
end
ecarts=mean(match);
%autres ecarts
for i=2:length(sons0(:,1))
match=[];
for j=1:7
match = [match abs(sons0(i,j)-indices(j))];
end
moyenne=mean(match);
ecarts=[ecarts moyenne];
end
[minima,indice]=min(ecarts);
resultat=[resultat mots(indice,:)];
disp(resultat);
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