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Comparing two signals using correlation in matlab

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Kashyap Cherukuri

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How to compare two signals using correlation in matlab. i know the function is xcorr. But xcorr returns an array of coefficients. What I want to learn is the next step in comparing them. I have no idea of how to compare them.
 

See what I am getting is that u dont know what cross correlation means...
When there u find the cross correlation between signals A and B, U are actually judging the how closely A and B are related.
[corr,lag]=xcorr(A,B,maxlag);
stem(lag,corr);
what it does that with different- different lags compares A and B. and gives u the result. The more the value of coefficient the similar they are.

U can also use cross correlation for pattern recognition as follows:
autocorrelate A
Cross correlate A and B
if the results are same then A and B are same.
 

The voice files can be read in an arry for each and proceed.
 

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