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).
© djmw, October 23, 2014