signal processing - Cepstrum analysis: how to find quefrency step? -

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i'm newbie in cepstrum analysis. that's question.

i have signal length 4096 , sample rate 8000 hz. make fft , array length 4096*2 (2*i position cosinus coeff, 2*i+1 position sinus coeff). frequency step (samplerate/signallength == 8000/4096). so, can calculate frequency @ position way: i*samplerate/signallength.

then, make cepstrum transformation. can't understand how find quefrency step , how find frequency given quefrency.

the bin number of fft result inversely proportional length of period of sinusoidal component in time domain. bin number of quefrency result inversely proportional distance between partials in series of overtones in frequency domain (this distance same root or fundamental pitch). quefrency bin number proportional period or repeat lag (autocorrelation peak) of harmonically rich periodic signal in time domain.


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