annotate util/Rice Wavelet Toolbox/midwt.mhelp @ 81:a30e8bd6d948

matlab_midi scripts
author Ivan <ivan.damnjanovic@eecs.qmul.ac.uk>
date Mon, 28 Mar 2011 17:35:01 +0100
parents f69ae88b8be5
children
rev   line source
ivan@78 1 function [y,L] = midwt(x,h,L);
ivan@78 2 % [x,L] = midwt(y,h,L);
ivan@78 3 %
ivan@78 4 % Function computes the inverse discrete wavelet transform x for a 1D or
ivan@78 5 % 2D input signal y using the scaling filter h.
ivan@78 6 %
ivan@78 7 % Input:
ivan@78 8 % y : finite length 1D or 2D input signal (implicitly periodized)
ivan@78 9 % (see function mdwt to find the structure of y)
ivan@78 10 % h : scaling filter
ivan@78 11 % L : number of levels. In the case of a 1D signal, length(x) must be
ivan@78 12 % divisible by 2^L; in the case of a 2D signal, the row and the
ivan@78 13 % column dimension must be divisible by 2^L. If no argument is
ivan@78 14 % specified, a full inverse DWT is returned for maximal possible
ivan@78 15 % L.
ivan@78 16 %
ivan@78 17 % Output:
ivan@78 18 % x : periodic reconstructed signal
ivan@78 19 % L : number of decomposition levels
ivan@78 20 %
ivan@78 21 % 1D Example:
ivan@78 22 % xin = makesig('LinChirp',8);
ivan@78 23 % h = daubcqf(4,'min');
ivan@78 24 % L = 1;
ivan@78 25 % [y,L] = mdwt(xin,h,L);
ivan@78 26 % [x,L] = midwt(y,h,L)
ivan@78 27 %
ivan@78 28 % 1D Example's output:
ivan@78 29 %
ivan@78 30 % x = 0.0491 0.1951 0.4276 0.7071 0.9415 0.9808 0.6716 0.0000
ivan@78 31 % L = 1
ivan@78 32 %
ivan@78 33 % See also: mdwt, mrdwt, mirdwt
ivan@78 34 %
ivan@78 35
ivan@78 36 %
ivan@78 37 %
ivan@78 38 %File Name: midwt.m
ivan@78 39 %Last Modification Date: 08/07/95 15:13:52
ivan@78 40 %Current Version: midwt.m 2.4
ivan@78 41 %File Creation Date: Wed Oct 19 10:51:58 1994
ivan@78 42 %Author: Markus Lang <lang@jazz.rice.edu>
ivan@78 43 %
ivan@78 44 %Copyright (c) 2000 RICE UNIVERSITY. All rights reserved.
ivan@78 45 %Created by Markus Lang, Department of ECE, Rice University.
ivan@78 46 %
ivan@78 47 %This software is distributed and licensed to you on a non-exclusive
ivan@78 48 %basis, free-of-charge. Redistribution and use in source and binary forms,
ivan@78 49 %with or without modification, are permitted provided that the following
ivan@78 50 %conditions are met:
ivan@78 51 %
ivan@78 52 %1. Redistribution of source code must retain the above copyright notice,
ivan@78 53 % this list of conditions and the following disclaimer.
ivan@78 54 %2. Redistribution in binary form must reproduce the above copyright notice,
ivan@78 55 % this list of conditions and the following disclaimer in the
ivan@78 56 % documentation and/or other materials provided with the distribution.
ivan@78 57 %3. All advertising materials mentioning features or use of this software
ivan@78 58 % must display the following acknowledgment: This product includes
ivan@78 59 % software developed by Rice University, Houston, Texas and its contributors.
ivan@78 60 %4. Neither the name of the University nor the names of its contributors
ivan@78 61 % may be used to endorse or promote products derived from this software
ivan@78 62 % without specific prior written permission.
ivan@78 63 %
ivan@78 64 %THIS SOFTWARE IS PROVIDED BY WILLIAM MARSH RICE UNIVERSITY, HOUSTON, TEXAS,
ivan@78 65 %AND CONTRIBUTORS AS IS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
ivan@78 66 %BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
ivan@78 67 %FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL RICE UNIVERSITY
ivan@78 68 %OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
ivan@78 69 %EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
ivan@78 70 %PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
ivan@78 71 %OR BUSINESS INTERRUPTIONS) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
ivan@78 72 %WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
ivan@78 73 %OTHERWISE), PRODUCT LIABILITY, OR OTHERWISE ARISING IN ANY WAY OUT OF THE
ivan@78 74 %USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
ivan@78 75 %
ivan@78 76 %For information on commercial licenses, contact Rice University's Office of
ivan@78 77 %Technology Transfer at techtran@rice.edu or (713) 348-6173
ivan@78 78 %
ivan@78 79 %Change History:
ivan@78 80 %
ivan@78 81 %Modification #1
ivan@78 82 %Mon Aug 7 11:52:33 CDT 1995
ivan@78 83 %Rebecca Hindman <hindman@ece.rice.edu>
ivan@78 84 %Added L to function line so that it can be displayed as an output
ivan@78 85 %
ivan@78 86 %Thu Mar 2 13:07:11 CDT 2000
ivan@78 87 %Ramesh Neelamani<neelsh@ece.rice.edu>
ivan@78 88 %Revamped the help file
ivan@78 89 %
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ivan@78 93