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Liftering, its physical significance

What is the physical significance of liftering done to an analog signal (particularly an audio signal)?

What is its role pertaining to MFCC feature extraction process?
Sindhu Chowdary
Sindhu Chowdary • Aug 3, 2015
MFCC is a feature used in Automatic Speech Recognition.To understand the liftering concept , first you need to understand the concept of Cepstral Analysis.

Speech is a mixture of vocal tract and input exitation.Liftering is a method used to separate the vocal tract and the excitation sequence in the frequency domain.You can say that Liftering is somewhat similar to filtering in frequency domain. In filtering , normally we multiply the whole spectrum with a desired rectangular window. Simialrly in liftering also

But your question is far too wide to answer exactly. Refer to the links below.Hope they might be helpful for you to understand.

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