function rf=lpcao2rf(ao)
%LPCAO2RF LPC: Convert area ratios to reflection coefficients RF=(AO)



%      Copyright (C) Mike Brookes 1998
%      Version: $Id: lpcao2rf.m,v 1.4 2007/05/04 07:01:38 dmb Exp $
%
%   VOICEBOX is a MATLAB toolbox for speech processing.
%   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
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%   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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%   http://www.gnu.org/copyleft/gpl.html or by writing to
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rf = (1-ao)./(1+ao);
