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lpccw2zz

PURPOSE ^

LPCPZ2ZZ LPC: Power spectrum roots to LPC poles ZZ=(CW)

SYNOPSIS ^

function zz=lpccw2zz(cw)

DESCRIPTION ^

LPCPZ2ZZ LPC: Power spectrum roots to LPC poles ZZ=(CW)
 pz are the roots of the power spectrum polynomial pp(cos(w))

CROSS-REFERENCE INFORMATION ^

This function calls: This function is called by:

SOURCE CODE ^

0001 function zz=lpccw2zz(cw)
0002 %LPCPZ2ZZ LPC: Power spectrum roots to LPC poles ZZ=(CW)
0003 % pz are the roots of the power spectrum polynomial pp(cos(w))
0004 
0005 %      Copyright (C) Mike Brookes 1998
0006 %      Version: $Id: lpccw2zz.m 713 2011-10-16 14:45:43Z 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 zs=sqrt(cw.^2-1);
0028 zz=cw-sign(real(conj(cw).*zs)).*zs;

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