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Hi, all I am motin. I am new in matlab. I fft a signal. and when i fft i
take just half part of the fft value because replica is ignored and take the
absolute value. now i simple change this value. now i want to regerate the
original signal.
that means i need a mirror of the half value to get the whole signal. but how i
give my code below.
[x, fs]=wavread('attack.wav');
block=256;
n=floor(length(x)/block);
x=x(1:block*n);

Y=reshape(x,n,block);
length(Y)

SP=zeros(n,block/2);
for i=1:n
    S=fft(Y(i,:),block);
    SP(i,:)=abs(S(1:block/2)); 
end

imagesc(1:n,1:128,20*log10(SP')), axis xy, colormap(jet);

hi, Now i regenerate the original signal from the matrix SP. But how.
Plzzz can any one help me....

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