gusucode.com > 《MATLAB图像与视频处理实用案例详解》代码 > 《MATLAB图像与视频处理实用案例详解》代码/第 19 章 基于语音识别的信号灯图像模拟控制技术/voicebox/lpczz2cc.m
function cc=lpczz2cc(zz,np) %LPCZZ2CC Convert poles to "complex" cepstrum CC=(ZZ,NP) % Copyright (C) Mike Brookes 1997 % Version: $Id: lpczz2cc.m,v 1.4 2007/05/04 07:01:39 dmb Exp $ % % VOICEBOX is a MATLAB toolbox for speech processing. % Home page: 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 % http://www.gnu.org/copyleft/gpl.html or by writing to % Free Software Foundation, Inc.,675 Mass Ave, Cambridge, MA 02139, USA. %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% [nf,p]=size(zz); if (nargin < 2) np=p; end cc=zeros(nf,np); yy=zz.'; if p<2 % special case 'cos sum() is weird cc(:,1)=real(zz); for k=2:np yy=yy.*zz.'; cc(:,k)=real(yy).'/k; end else cc(:,1)=sum(real(yy)).'; for k=2:np yy=yy.*zz.'; cc(:,k)=sum(real(yy)).'/k; end end