History
Paul Mermelstein is typically credited with the development of the MFC. Mermelstein credits Bridle and Brown for the idea:
Bridle and Brown used a set of 19 weighted spectrum-shape coefficients given by the cosine transform of the outputs of a set of nonuniformly spaced bandpass filters. The filter spacing is chosen to be logarithmic above 1 kHz and the filter bandwidths are increased there as well. We will, therefore, call these the mel-based cepstral parameters.
Sometimes both early originators are cited.
Many authors, including Davis and Mermelstein, have commented that the spectral basis functions of the cosine transform in the MFC are very similar to the principal components of the spectra, which were applied to speech representation and recognition much earlier by Pols and his colleagues.
Read more about this topic: Mel-frequency Cepstrum
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