www.pudn.com > voicebox2.zip > KMEANLBG.M

function [x,esq,j] = kmeanlbg(d,k) 
%KMEANLBG Vector quantisation using the Linde-Buzo-Gray algorithm [X,ESQ,J]=(D,K) 
% 
%Inputs: 
% D contains data vectors (one per row) 
% K is number of centres required 
% 
%Outputs: 
% X is output row vectors (K rows) 
% ESQ is mean square error 
% J indicates which centre each data vector belongs to 
% 
%  Implements LBG K-means algorithm: 
% Linde, Y., A. Buzo, and R. M. Gray, 
% "An Algorithm for vector quantiser design," 
% IEEE Trans Communications, vol. 28, pp.84-95, Jan 1980. 
 
 
%      Copyright (C) Mike Brookes 1998 
% 
%      Last modified Fri Apr  3 14:57:14 1998 
% 
%   VOICEBOX 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 
%   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. 
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 
 
nc=size(d,2); 
[x,esq,j]=kmeans(d,1); 
m=1; 
while m