Applying a Liftering function to an audio signal

Question

Is it necessary to perform the liftering function before applying MFCC to an audio signal?

score 5 · Accepted Answer · edited Apr 13 '17 at 12:47

5

No, liftering is never applied before computing MFCC because liftering is defined as a windowing operation in the cepstral domain. So you need cepstral coefficients in order to be able to apply liftering.

The effect of liftering is to smoothen the corresponding log magnitude spectrum, which can result in more robust recognition / classification results.

Also take a look at this question, and the references in its answer.

edited Apr 13 '17 at 12:47

Community

1

answered Jan 03 '17 at 11:07

Matt L.

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Now it makes perfect sense! :) I referred the question on the above link too. – mgw2016 Jan 04 '17 at 04:08

Applying a Liftering function to an audio signal

1 Answers1