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



%      Copyright (C) Mike Brookes 1998
%
%      Last modified Fri Apr  3 14:57:15 1998
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%   VOICEBOX home page: http://www.ee.ic.ac.uk/hp/staff/dmb/voicebox/voicebox.html
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rf = (1-ao)./(1+ao);