function?[lo?hi]?=?afb（x?af）

%?Analysis?filter?bank
%
%?USAGE:
%????[lo?hi]?=?afb（x?af）
%?INPUT:
%????x?-?N-point?vector?where
%????????????1）?N?is?even
%????????????2）?N?>=?length（af）
%????af?-?analysis?filters
%????af（:?1）?-?lowpass?filter?（even?length）
%????af（:?2）?-?highpass?filter?（even?length）
%?OUTPUT:
%????lo?-?Low?frequecy?output
%????hi?-?High?frequency?output
%?EXAMPLE:
%????[af?sf]?=?farras;
%????x?=?rand（164）;
%????[lo?hi]?=?afb（x?af）;
%????y?=?sfb（lo?hi?sf）;
%????err?=?x?-?y;?
%????max（abs（err））
%
%?WAVELET?SOFTWARE?AT?POLYTECHNIC?UNIVERSITY?BROOKLYN?NY
%?http://taco.poly.edu/WaveletSoftware/

N?=?length（x）;
L?=?length（af）/2;
x?=?cshift（x-L）;

%?lowpass?filter
lo?=?upfirdn（x?af（:1）?1?2）;
lo（1:L）?=?lo（N/2+[1:L]）?+?lo（1:L）;
lo?=?lo（1:N/2）;

%?highpass?filter
hi?=?upfirdn（x?af（:2）?1?2）;
hi（1:L）?=?hi（N/2+[1:L]）?+?hi（1:L）;
hi?=?hi（1:N/2）;

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件????????927??2003-06-12?01:41??codes\afb.m

?????文件????????910??2003-06-12?01:41??codes\afb2D.m

?????文件???????1006??2003-06-09?18:22??codes\afb2D_A.m

?????文件???????2683??2003-06-12?01:41??codes\afb3D.m

?????文件???????1827??2003-07-17?12:03??codes\AntonB.m

????......R????262144??2001-11-07?20:52??codes\barbara

?????文件????????376??2003-06-09?18:23??codes\bishrink.m

????......R????262144??2001-11-07?20:51??codes\boat

?????文件????????275??2003-06-09?18:23??codes\cden2.m

?????文件???????1294??2003-06-12?01:41??codes\cplxdual2D.m

?????文件????????826??2003-06-09?18:29??codes\cplxdual2D_plots.m

?????文件???????1531??2003-06-12?01:41??codes\cplxdual3D.m

?????文件???????2011??2003-06-09?18:29??codes\cplxdual3D_plots.m

?????文件????????381??2003-06-12?01:41??codes\cshift.m

?????文件????????385??2003-06-12?01:41??codes\cshift2D.m

?????文件????????634??2003-06-12?01:41??codes\cshift3D.m

?????文件????????273??2003-06-09?18:29??codes\den2.m

?????文件???????1049??2003-06-09?18:29??codes\den3.m

?????文件????????653??2003-06-09?18:29??codes\denC2D.m

?????文件???????2445??2003-07-02?00:11??codes\denoising_dtdwt.m

?????文件???????1458??2003-06-09?18:29??codes\denoising_dwt.m

?????文件????????526??2003-06-09?18:29??codes\denR2D.m

?????文件????????400??2003-06-09?18:29??codes\denS2D.m

?????文件???????1570??2003-06-12?01:41??codes\dualfilt1.m

?????文件???????1107??2003-06-12?01:41??codes\dualtree.m

?????文件???????1339??2003-06-12?01:41??codes\dualtree2D.m

?????文件????????493??2003-06-09?18:29??codes\dualtree2D_plots.m

?????文件???????1233??2003-06-12?01:41??codes\dualtree3D.m

?????文件????????759??2003-06-09?18:29??codes\dualtree3D_plots.m

?????文件????????720??2003-06-09?18:29??codes\dualtree_eg1.m

............此處省略40個文件信息