gusucode.com > 语音信号处理工具箱 - Voicebox源码程序 > Voicebox\lpccw2zz.m
function zz=lpccw2zz(cw) %LPCPZ2ZZ LPC: Power spectrum roots to LPC poles ZZ=(CW) % pz are the roots of the power spectrum polynomial pp(cos(w)) % Copyright (C) Mike Brookes 1998 % % Last modified Tue Feb 5 18:06:44 2002 % % VOICEBOX is a MATLAB toolbox for speech processing. Home page is at % http://www.ee.ic.ac.uk/hp/staff/dmb/voicebox/voicebox.html % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % This program is free software; you can redistribute it and/or modify % it under the terms of the GNU General Public License as published by % the Free Software Foundation; either version 2 of the License, or % (at your option) any later version. % % 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. % % You can obtain a copy of the GNU General Public License from % ftp://prep.ai.mit.edu/pub/gnu/COPYING-2.0 or by writing to % Free Software Foundation, Inc.,675 Mass Ave, Cambridge, MA 02139, USA. %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% zs=sqrt(cw.^2-1); zz=cw-sign(real(conj(cw).*zs)).*zs;