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comparison Code/Descriptors/Matlab/Common/ShortTimeEnergy.m @ 0:ea0c737c6323

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author Dawn Black <dawn.black@eecs.qmul.ac.uk>
date Thu, 26 Jul 2012 14:46:25 +0100
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-1:000000000000 0:ea0c737c6323
1 function E = ShortTimeEnergy(signal, windowLength, step);
2 signal = signal / max(max(signal));
3 curPos = 1;
4 L = length(signal);
5 numOfFrames = floor((L-windowLength)/step) + 1;
6 %H = hamming(windowLength);
7 E = zeros(numOfFrames,1);
8 for (i=1:numOfFrames)
9 window = (signal(curPos:curPos+windowLength-1));
10 E(i) = (1/(windowLength)) * sum(abs(window.^2));
11 curPos = curPos + step;
12 end