cepstrum

mathematics (Coined in a 1963 paper by Bogert, Healey, and

Tukey) The Fourier transform of the log-magnitude spectrum:

fFt(ln( | fFt(window . signal) | ))

This function is used in speech recognition and possibly

elsewhere. Note that the outer transform is NOT an inverse

Fourier transform (as reported in many respectable DSP texts).

[What's it for?]

(1997-01-07)