MFCC Comparison of Same Speech Sample Recorded with 2 Different Microphones

Started by Raeldor January 20, 2011
Hi All,

I am using MFCC to compare the same speech same recorded with 2
different microphones.  When I check the correlation of the MFCC data
it comes back with only a 32% positive correlation.  One sample sounds
very clean (headset), the other sounds like it's being played back
through a transistor radio, but they are the same sound sample.

Is there a common technique either during pre-processing of the sample
or during the comparison of the MFCC's to erradicate any difference?

Oh, btw I am already applying a high pass filter at the beginning and
then using cepstral mean subtraction on the MFCC's at the end.