MelSpectrogram: To MFCC...

A command to create a MFCC object from each selected MelSpectrogram object.

Mel frequency cepstral coefficients ck in each frame of the MFCC object result from the output of a Discrete Cosine Transform on spectral values Pj in the corresponding frame of the MelSpectrogram. The following formula shows the relation between the values in each frame:

ck-1 = Σj=1N Pj cos (π(k-1)(j-0.5)/N)),

where N represents the number of spectral values and Pj the power in dB of the jth spectral value (k runs from 1 to N).

This transformation was first used by Davis & Mermelstein (1980).

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© djmw, October 23, 2014