[SciPy-User] How to calculate Yulewalk with scipy.optimize.leastsq

silva@lma.cnrs-m... silva@lma.cnrs-m...
Sat Jan 21 04:29:34 CST 2012

> I'm curious why they use log and exp during fft
> ifft(exp(fft(hf)))
> The only other mention of this that I found is on the octave mailing list.

Looks like cepstrum, a quite common tool in speech analysis, but in  
fact it is not the same think

Cepstrum would be
log |ft(f)|
see http://en.wikipedia.org/wiki/Cepstrum

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