Archives
Suffix Array
The definition from the NIST Dictionary of Algorithms and Data Structures.
http://www.nist.gov/dads/HTML/suffixarray.htmlPrefix Code
The definition from the NIST Dictionary of Algorithms and Data Structures.
http://www.nist.gov/dads/HTML/prefixcode.htmlShannon-Fano Coding
The definition from the NIST Dictionary of Algorithms and Data Structures.
http://www.nist.gov/dads/HTML/shannonFano.htmlAVPhone ActiveX Controls
These ActiveX controls provide real-time compression and rendering of audio and video streams, supporting standard formats such as H.263, MPEG-4, G.723 and more. It appears that they are designed for IP Telephony, but they also advertise the ability to do straight-up compression to/from disk or memory. You can use a demo version for free, with […]
http://www.banasoft.net/AVPhone.htmLameBrain
A freeware MP3 encoder for Mac OS X. Uses the LAME encoder to do all the work, provides a nice GUI front end for all that.
Shipping version 0.5.2, still in beta, as of April 2003.
http://freshmeat.net/projects/lamebrainSouthDowns
SouthDowns is a set of Perl scripts for the creation of JPEG 2000 files from JPEG 2000 codestreams. If you’re interested in the format used by the standard, this might be an easy way to experiment with it. The sample program appears to insert some metadata into the image file.
Warning: this release has no release […]
http://public.migrator2000.org/downloads.xalterVlorb
Vlorb is a high-quality Audio CD to Ogg Vorbis encoder. It does this by operating as a console front end to cdparanoia and CDDB on Linux systems.
Vlorb 1.0pre9 shipped at the end of March, 2003.
http://jk.yazzy.org/projects/vlorb/SoX - Sound Exchange
SoX aims to be the Swiss Army Knife of sound processing programs. It shows up on the data compression radar by virtue of the fact that SoX is able to convert between a wide variety of compressed formats, ranging from MP3 and Ogg to ADPCM and linear PCM. SoX has ports to a really nice […]
http://sox.sourceforge.net/Jarchiver
This is an open source tool that is described as a Java based archiving tool that is ideal for housekeeping tasks such as backups, pruning and more. Part of the archiving task is the ability to create zip archives, which explains its presence here.
Version 1.0 of Jarchiver is shipping as of March, 2003.
http://jarchiver.sourceforge.net/MPEG : Standards, Technology and Applications
A nice tutorial on MPEG-1 and MPEG-2 by Shanawaz Basith. Includes some links at the end.
http://www.doc.ic.ac.uk/~nd/surprise_96/journal/vol2/sab/article2.htmlread more from " MPEG : Standards, Technology and Applications "
MPEG-2 Video Compression
A tutorial by P.N. Tudor on the BBC web site. Gets right down into the nitty-gritty, stay away if you have math-phobia.
http://www.bbc.co.uk/rd/pubs/papers/paper_14/paper_14.htmlReal GIF Optimizer
A GIF optimizer seeks to reduce the size of your GIF files, usually without compromising image quality. Not enough detail on this site to pass judgment, but good GIF optimizers will also let you reduce the number of colors in the palette dynamically, so you can see the effect.
Real GIF Optimizer 3.05 shipped in February […]
http://www.realmultimedia.net/rgo.htmZip Backup to CD
A backup program that uses the standard Zip format. Supports complete system restore for Windows ME and 9x. Version 3 will have built in CD and DVD burning support, eliminating the need for an external burner program.
Version 2.34 is shipping as of March, 2003.
http://www.zip-backup.com/English Text Frequencies
This page has some data on frequencies of words and letters in English text.
http://www.piclist.org/techref/method/compress/etxtfreq.htmHoloDynamic Compression: Mapping Miracles into the Machine
A great example of an incredible compression claim. There’s just a teeny tiny bit good thinking in here, and a huge amount of tangential speculation attempting to walk upright on two legs. Read it and just be glad the author doesn’t seem to be raising funds.
http://www.maui.net/~shaw/celes/dcmind.htmlread more from " HoloDynamic Compression: Mapping Miracles into the Machine "
Tjalling J. Tjalkens
Tjalling is on the faculty of Technische Universiteit Eindhoven, which appears to be located in Eindhoven, The Netherlands. He is involved in research of various aspects of Information Theory, including Context Tree Weighting and Coding.
http://www.ics.ele.tue.nl/~ttjalken/Compress::PPMd
Salvador Fandiño García has created a Perl interface to Dmitry Shkarin PPMd compression library.
Version 0.05 is shipping as of March, 2003.
http://search.cpan.org/author/SALVA/ReaConverter Pro
This nifty program performs batch conversions of programs from a wide variety of types, including JPEG, BMP, TIF, PNG, and the usual other suspects. Lots of other features are added to the mix, including such goodies as watermark insertion, cropping, sharpening, blurring, etc.
Version 3.0 shipped in April, 2003.
http://www.reasoft.com/products/reaconverter/