Subject: Speech Processing

Topic: Homomorphic Speech Processing

Difficulty: High

How will you convert power spectrum to mel scale? Explain the procedure for calculation MFCC with a block schematic. Clearly explain how the integration of power is done on mel scale filters .How will you compress the amplitude of power spectrum? How is spectral smoothing done?

(i) The Mel Frequency Cepstrum (MFC) can be defined as the short-time power spectrum of a speech signal, which is calculated as the linear cosine transform of the log power spectrum on a non-linear Mel scale frequency.

(ii) In the case of the MFC, the frequency bands are equally spaced …