Xcorr - plot correlation across time.
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Hi,
I'm very new to Matlab and what i'm trying to do is find the correlation of two separate audio .wav files. At the moment I have the following (x & y are my .wavs):
C = xcorr(x,y,'coeff');
ICC = max(abs(C));
This allows me to find the point with the highest correlation, right?
But what I want to do is take a reading of the xcorr or 'C' at 80ms intervals so I can plot the correlation over time, rather than just at one point.
Any ideas?
Thanks in advance.
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RNTL
2012-6-10
but you do have it over time, that's what C means.
and (if both signals have the same sample rate) it is spaced according to the sampling time.
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Wayne King
2012-6-10
t = 0:0.001:1-0.001;
x = cos(2*pi*100*t)+randn(size(t));
y = sin(2*pi*100*t)+randn(size(t));
[xc,lags] = xcorr(x,y,'coeff');
stem(lags*0.001,xc);
The above gives the lags as sampling intervals, 0.001 seconds in this example.
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