www.gusucode.com > wavelet工具箱matlab源码程序 > wavelet/wavelet/@laurpoly/rescale.m
function [HsN,GsN,HaN,GaN] = rescale(Hs,Gs,Ha,Ga,cfsRES) %RESCALE Rescale Laurent polynomials. % If (Hs,Gs) and (Ha,Ga) are two pairs of Laurent % polynomials and cfsRES a non-zero real number different % [HsN,GsN,HaN,GaN] = RESCALE(Hs,Gs,Ha,Ga,cfsRES) returns % two "rescaled" pairs such that: % HsN = cfsRES * Hs; GsN = Gs / cfsRES; % HaN = Ha / cfsRES; GaN = cfsRES * Ga; % % If the pairs (Hs,Gs) and (Ha,Ga) are associated to perfect % reconstruction filters then so are the two "rescaled" % pairs (HsN,GsN) and (HaN,GaN) (see PRAACOND). % M. Misiti, Y. Misiti, G. Oppenheim, J.M. Poggi 02-Jul-2003. % Last Revision: 08-Jul-2003. % Copyright 1995-2004 The MathWorks, Inc. HsN = cfsRES*Hs; GsN = Gs/cfsRES; HaN = Ha/cfsRES; GaN = cfsRES*Ga;