Computation of the complex cepstrum by factorization of the z-transform

We compute the complex cepstrum of a finite duration slgnal by completely factoring its z-transform and summing the easily obtained complex cepstra of the factors. The method requires no phase unwrapping and introduces no aliasing. The only approximation is the unavoidable finite time window. Thus the factorization method provides a means for evaluating other methods for computing the complex cepstrum.