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   -> Volume 2, Issue 13


Announcing XWPL, the X Wavelet Packet Laboratory
 
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Author Message
Fazal Majid, Yale University
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PostPosted: Fri Nov 29, 2002 3:35 pm    
Subject: Announcing XWPL, the X Wavelet Packet Laboratory
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Announcing XWPL, the X Wavelet Packet Laboratory

Announcing XWPL, the X Wavelet Packet Laboratory

I am proud to announce the first release of XWPL, the X Window System Wavelet
Packet Laboratory. It is available in binary form by anonymous ftp from
pascal.math.yale.edu, in the directory /pub/software/xwpl. Binaries are
available for the following platforms:

- Sun Sparcstations running SunOS 4.1
- NeXT machines running NeXTstep 3.0 or higher, with an X server
- Silicon Graphics machines (IRIS)
- DEC Alpha AXP running OSF/1 1.2 or higher
- i386/i486 PC compatible with Linux 0.99

1 What is XWPL ?

XWPL is an X based tool to examine one-dimensional real-valued signals using
wavelets and wavelet packets. It has been designed to be as easy to use as
possible for beginners. It is intended more as an educational and exploratory
tool than as a numerical analysis program, even though it uses fast, optimized
wavelet and wavelet packet transforms.

2 What are Wavelets and Wavelet Packets ?

In short, wavelets are a way to analyze a signal using base functions which
are localized both in time (as diracs, but unlike sine waves), and in
frequency (as sine waves, but unlike diracs). They can be used for efficient
numerical algorithms and many DSP or compression applications.

The mathematical theory behind wavelets (and other related transforms) is
given in the appendix of the XWPL reference manual. There is also a good
"5-minute" introduction to wavelets in the comp.compression newsgroup FAQ.
There is a Wavelet-related mailing list.

Other sources of information on wavelets are:
- a mailing list, "Wavelet Digest"
- the Wavelet gopher site bigcheese.math.sc.edu
- the ftp servers pascal.math.yale.edu and maxwell.math.sc.edu

3 How to get it

XWPL is available in binary form only from the ftp server
pascal.math.yale.edu, in the directory /pub/software/xwpl. There is one
directory for each supported machine containing compressed executables, the
man page. There is also a sample data directory containing interesting
signals. When you transfer the files, do not forget to set binary mode and to
set the executable bit after uncompressing the program with "chmod +x xwpl".

All bug-reports, suggestions, clarifications, flames, etc... should be
directed to the author, Fazal Majid (majid@math.yale.edu).

5 No warranty

XWPL is put on anonymous ftp as a service to the math/DSP/internet
communities. There is no warranty for this software. If you are not
satisfied with these terms, do not use it!

THIS SOFTWARE IS LICENSED FREE OF CHARGE FOR NONCOMMERCIAL, RESEARCH, AND
EDUCATIONAL PURPOSES. PLEASE ADDRESS REQUESTS FOR COMMERCIAL AND ADDITIONAL
RIGHTS TO PROFESSOR R.R.COIFMAN, DEPARTMENT OF MATHEMATICS, YALE UNIVERSITY,
10 HILLHOUSE AVENUE, NEW HAVEN CONNECTICUT 06520. YOU MAY FREELY REDISTRIBUTE
ALL OR PART OF THIS SOFTWARE PACKAGE AS LONG AS YOU OBSERVE THE FOLLOWING
CONDITIONS:
1. YOU CHARGE NO FEE BEYOND REASONABLE DUPLICATION COSTS.
2. YOU INCLUDE THIS FILE IN ALL DIRECTORIES OF THE DISTRIBUTION.

NO WARRANTY
BECAUSE XWPL IS LICENSED FREE OF CHARGE, WE PROVIDE ABSOLUTELY NO WARRANTY, TO
THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN
WRITING, YALE UNIVERSITY, F. MAJID, R.R.COIFMAN, Y.MEYER, M.V.WICKERHAUSER,
AND/OR OTHER PARTIES PROVIDE XWPL "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER
EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO
THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE XWPL
PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
REPAIR OR CORRECTION.

IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW WILL YALE UNIVERSITY, F. MAJID,
R.R.COIFMAN, Y.MEYER, M.V.WICKERHAUSER, AND/OR ANY OTHER PARTY WHO MAY MODIFY
AND REDISTRIBUTE XWPL AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
INCLUDING ANY LOST PROFITS, LOST MONIES, OR OTHER SPECIAL, INCIDENTAL, OR
CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM,
EVEN IF YOU HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES, OR FOR ANY
CLAIM BY ANY OTHER PARTY. THESE LOSSES INCLUDE BUT ARE NOT LIMITED TO: LOSS
OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY THIRD PARTIES
OR A FAILURE OF THE PROGRAM TO OPERATE WITH PROGRAMS NOT DISTRIBUTED BY YALE
UNIVERSITY OR THE AUTHORS OF THIS SOFTWARE.
All times are GMT + 1 Hour
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