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wavelet coefficients centroid of audio signal

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maxina dialin
maxina dialin 2012-10-13
i applied wavedec for an audio signal.,after that i have to calculate energy and centroid of the wavelet coefficients(approximation and detail)for all frames of the audio signal.,i dnt know how to do.,can anyone help me?

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Wayne King
Wayne King 2012-10-13
You already have this thread open:
http://www.mathworks.it/matlabcentral/answers/50149-how-can-i-find-the-centroid-of-the-wavelet-coefficients-from-each-frame-of-the-audio-signal
You say in that post that you need to find one "centroid" for all the detail coefficients including the approximation coefficients. I'm not sure why you would ever want to do but:
load noisdopp;
[C,L] = wavedec(noisdopp,5,'sym4');
mean(C)
The above gives you the mean over all the coefficients, both approximation and details.
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maxina dialin
maxina dialin 2012-10-13
Thank u.,bt in my paper they suggested some other formula to find centroid not like mean.,so only i asked
Wayne King
Wayne King 2012-10-13
Then you should show us where that paper is, or include the equation in your post.

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