v_lpczz2cc

PURPOSE ^

V_LPCZZ2CC Convert poles to "complex" cepstrum CC=(ZZ,NP)

SYNOPSIS ^

function cc=v_lpczz2cc(zz,np)

DESCRIPTION ^

V_LPCZZ2CC Convert poles to "complex" cepstrum CC=(ZZ,NP)

CROSS-REFERENCE INFORMATION ^

This function calls: This function is called by:

SOURCE CODE ^

0001 function cc=v_lpczz2cc(zz,np)
0002 %V_LPCZZ2CC Convert poles to "complex" cepstrum CC=(ZZ,NP)
0003 
0004 
0005 %      Copyright (C) Mike Brookes 1997
0006 %      Version: $Id: v_lpczz2cc.m 10865 2018-09-21 17:22:45Z dmb $
0007 %
0008 %   VOICEBOX is a MATLAB toolbox for speech processing.
0009 %   Home page: http://www.ee.ic.ac.uk/hp/staff/dmb/voicebox/voicebox.html
0010 %
0011 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
0012 %   This program is free software; you can redistribute it and/or modify
0013 %   it under the terms of the GNU General Public License as published by
0014 %   the Free Software Foundation; either version 2 of the License, or
0015 %   (at your option) any later version.
0016 %
0017 %   This program is distributed in the hope that it will be useful,
0018 %   but WITHOUT ANY WARRANTY; without even the implied warranty of
0019 %   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
0020 %   GNU General Public License for more details.
0021 %
0022 %   You can obtain a copy of the GNU General Public License from
0023 %   http://www.gnu.org/copyleft/gpl.html or by writing to
0024 %   Free Software Foundation, Inc.,675 Mass Ave, Cambridge, MA 02139, USA.
0025 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
0026 
0027 [nf,p]=size(zz);
0028 if (nargin < 2) np=p; end
0029 cc=zeros(nf,np);
0030 yy=zz.';
0031 if p<2            % special case 'cos sum() is weird
0032   cc(:,1)=real(zz);
0033   for k=2:np
0034     yy=yy.*zz.';
0035     cc(:,k)=real(yy).'/k;
0036   end
0037 else
0038   cc(:,1)=sum(real(yy)).';
0039   for k=2:np
0040     yy=yy.*zz.';
0041     cc(:,k)=sum(real(yy)).'/k;
0042   end
0043 end

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