Related to the calculation, verification, usage, and requirements for Mel Frequency Cepstral Coefficients.
MFCCs are commonly derived as follows:
- Take the Fourier transform of (a windowed excerpt of) a signal.
- Map the powers of the spectrum obtained above onto the mel scale, using triangular overlapping windows.
- Take the logs of the powers at each of the mel frequencies.
- Take the discrete cosine transform of the list of mel log powers, as if it were a signal. The MFCCs are the amplitudes of the resulting spectrum.
Great tutorial on MFCC: MFCC Tutorial on Practical Cryptography