Overlap of segments while manually implementing STFT

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raj
raj 2011-11-7
actually i have a large audio signal and i need to implement stft manually , i am succesful with my attempt but i have a problem with my overlap of segments
please kindly suggest me in solving this problem
thanks in advance
W_total1 =[];%nullmatrix
while (pos+nw <= nx)
% while enough signal left
if n == 1
w1start = 0;
w1(end) = w1;
elseif n==2
w1start = (n-1)*w1 - feed;
w1(end) = (w1 + feed);
else
w1start = (w1start + w1(end))/2;
w1(end) = w1start + w1;
end
z(n,:) = x1(pos:pos+nw-1).*w(:,28000);
n = n+1;
pos = pos + nw/2;
W = fft(z(n-1,:));
W = W(1:end/2);
W_total1 = [W_total1 W.'];
end

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