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lpczz2ss

PURPOSE ^

LPCZZ2SS Convert z-place poles to s-plane poles SS=(ZZ)

SYNOPSIS ^

function ss=lpczz2ss(zz)

DESCRIPTION ^

LPCZZ2SS Convert z-place poles to s-plane poles SS=(ZZ)
the s-plane is in units of Normalized Hz and so the imaginary part
 of each ss() value is in the range +-0.5

 If you multiply ss by the sample frequency, a formant with
 frequency f and bandwidth b will give an s-plane pole-pair
 of approximately -b/2 +- j f

CROSS-REFERENCE INFORMATION ^

This function calls: This function is called by:

SOURCE CODE ^

0001 function ss=lpczz2ss(zz)
0002 %LPCZZ2SS Convert z-place poles to s-plane poles SS=(ZZ)
0003 %the s-plane is in units of Normalized Hz and so the imaginary part
0004 % of each ss() value is in the range +-0.5
0005 %
0006 % If you multiply ss by the sample frequency, a formant with
0007 % frequency f and bandwidth b will give an s-plane pole-pair
0008 % of approximately -b/2 +- j f
0009 
0010 
0011 %      Copyright (C) Mike Brookes 1997
0012 %      Version: $Id: lpczz2ss.m 713 2011-10-16 14:45:43Z dmb $
0013 %
0014 %   VOICEBOX is a MATLAB toolbox for speech processing.
0015 %   Home page: http://www.ee.ic.ac.uk/hp/staff/dmb/voicebox/voicebox.html
0016 %
0017 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
0018 %   This program is free software; you can redistribute it and/or modify
0019 %   it under the terms of the GNU General Public License as published by
0020 %   the Free Software Foundation; either version 2 of the License, or
0021 %   (at your option) any later version.
0022 %
0023 %   This program is distributed in the hope that it will be useful,
0024 %   but WITHOUT ANY WARRANTY; without even the implied warranty of
0025 %   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
0026 %   GNU General Public License for more details.
0027 %
0028 %   You can obtain a copy of the GNU General Public License from
0029 %   http://www.gnu.org/copyleft/gpl.html or by writing to
0030 %   Free Software Foundation, Inc.,675 Mass Ave, Cambridge, MA 02139, USA.
0031 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
0032 
0033 ss=log(max(zz,1e-8))*0.5/pi;

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