function pf=lpccc2pf(cc,np,nc)
%LPCCC2PF Convert complex cepstrum to power spectrum PF=(CC,NP,NC)
% cc = complex cepstrum coefs
% np+2 = number of frequency values 0 to nyquist (default: np=size(cc,2))
% nc = number of cepstral coefs to use (default: nc=np);
% for high speed make np one less than a power of 2


%      Copyright (C) Mike Brookes 1998
%
%      Last modified Tue May 12 16:02:44 1998
%
%   VOICEBOX home page: http://www.ee.ic.ac.uk/hp/staff/dmb/voicebox/voicebox.html
%
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%   This program is free software; you can redistribute it and/or modify
%   it under the terms of the GNU General Public License as published by
%   the Free Software Foundation; either version 2 of the License, or
%   (at your option) any later version.
%
%   This program is distributed in the hope that it will be useful,
%   but WITHOUT ANY WARRANTY; without even the implied warranty of
%   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
%   GNU General Public License for more details.
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[nf,mc]=size(cc);
if nargin<2 np=mc+2; end
if nargin<3 nc=np; end
if nc==mc
   pf=exp(rsfft([zeros(nf,1) cc].',2*np+2).');
else
   pf=exp(rsfft([zeros(nf,1) lpccc2cc(cc,nc)].',2*np+2).');
end