Lots of links to free software from the MPEG Simulation Group.

http://www.mpeg.org/MPEG/MSSG/

An MPEG-2 Video Decoder from the MPEG Software Simulation Group at Berkeley.

ftp://mm-ftp.cs.berkeley.edu/pub/mpeg2/software/

The family of Netzip archiving programs seem to have a good set of features and have received good reviews when compared to WinZip and PKZip for Windows. NetZip 7.5 adds some flashy new features, including skins!

http://www.netzip.com/products/Info_Netzip_Win.html

NuLib is a program for the Apple II which manipulates NuFx archives. The page is also the distribution site for NuLib2, and improved version of the program, and NufxLib, a programming library.

http://www.nulib.com/

A console mode program that compresses CHW files. This is the type of file used in some help files distributed for Windows applications.

http://www.codeproject.com/tips/KeyCHW.asp

This is a freeware image compressor that does wavelet based compression. Lurawave appears to have all their products and documentation available in German language as well as English. In order to establish their products they are making much of it available as freeware.

http://www.algovisionluratech.com/products/lurawave/smart_compress/index.jsp?OnlineShopId=
592271037471970327

The committee draft of the JPEG2000 specification. This is not the final specification, but it should be very close.

Note: the Zip file disappeared sometime in July 2002, this link has been updated to point to a PDF version of the draft.

http://www.jpeg.org/public/fcd15444-1.pdf

This product is apparently some sort of archiver, but no information is to be found on this page!

http://magnusd.homepage.dk/zipit/zipitpro.html

A really great resource for those seeking MPEG information. Pointers to lots of fundamental information, FAQs, and answers to many questions.

http://www.mpeg.org/MPEG/starting-points.html

These folks make several different G.729 and G.723.1 codecs,

http://www.sipro.com/

Our technology served as the foundation for numerous voice compression products used by voice portal and large multinationals in their efforts to better meet the quality requirements that end users. As example voice email, voice chatting, voice annotation in web site. Our technology is already integrated into software by companies such as Microsoft with its Netshow® software and in its Mediaplayer®, and RealNetworks within its RealAudio® and RealVideo®. In addition, over the last decade this compression technology (over 100 patents) was positioned in several International Telecommunication standards, notably: GSM ,PCS, TDMA ,CDMA, TETRA, G.729 . VoiceAge’s compression technology is well positioned at cross road of internet and voice for next-generation of voice portal.

http://www.voiceage.com

Christos Chrysafis has quite a few papers on wavelets available here.

http://sipi.usc.edu/~ortega/Students/chrysafi/

Edward J. Delp describes his wavelet-based coding system for color images using a luminance/chromanance color space.

http://dynamo.ecn.purdue.edu/~ace/color-wavelet/cwavelet.html

Edward J. Delp and pals have created a rate-scalable video codec that uses a wavelet based codec with motion compensation.

http://dynamo.ecn.purdue.edu/~ace/wavelet/wavelet2.html

Edward J. Delp et.al. have tackled the problem of perfomring video compression using parallel processing techniques.

http://dynamo.ecn.purdue.edu/~ace/compression/compression.html

Edward J. Delp has a big batch of papers on line. This includes a big batch that deal with Image and Video compression.

http://dynamo.ecn.purdue.edu/~ace/delp-pub.html

James E. Fowler at Mississippi State University has created this library, which is an open source collection of routines that are useful for people interested in data compression research. The distribution includes QccSPIHT.

Version 0.45 is available as of December, 2003.

http://qccpack.sourceforge.net/

Antonio Ortega at USC has quite a few compression related papers on line. They include papers on wavelets and quantization.

http://sipi.usc.edu/~ortega/Papers.html

A PhD thesis by Geert Uytterhoeven.

http://www.cs.kuleuven.ac.be/~geert/PhD/

Avideh Zakhor has links to many of her papers on image compression.

http://www-video.eecs.berkeley.edu/~avz/

A collection of C programs that do string matching and pattern discovery. This appears to be free code by D. Gusfield, who also has a book called “Algorithms on Strings, Trees and Sequences: Computer Science and Computational Biology”.

One DCL reader commented The strmat package is wonderful.

http://www.cs.ucdavis.edu/~gusfield/strmat.html

This company is the licensing authority created by the owners of the most or all of the patents related to MPEG. Apparently they have the authority to provide one-stop shopping for your royalty arrangements.

http://www.mpegla.com/

This site apparently holds a set of files that were used to evaluate MPEG audio compression algorithms.

http://sound.media.mit.edu/mpeg4/audio/sqam/

The Open Here search engine page dedicate to compression algorithms

http://www.openhere.com/science/computer-science/algorithms/compression/

The OpenHere search engine’s page listing people involved with compression.

http://www.openhere.com/science/computer-science/algorithms/compression/researchers/

NASA says that this data compression algorithm is the Government Invention of the year. It is apparently an algorithm that can be used by spacecraft with limited transmission bandwidith.

http://web.archive.org/web/20010610231538/www.mrc.unm.edu/Uses/

These folks at UCSB are encoding speech at 2.8 Kbps. It sounds very good considering the bit rate. Links here to a presentation and an abstract, as well as some samples.

http://scl.ece.ucsb.edu/current/oded/ewi_demo.htm

This paper appears to discuss the concept of compressing images by breaking them down into small pieces and doing some sort of optimal compression on each piece. I assume the trick here is to locate the point of diminishing returns.

http://www.comp.nus.edu.sg/~leews/publications/tiling_rev.pdf

A sample chapter from The Scientist and Engineer’s Guide to Digital Signal Processing, which just happens to be on Data Compression. You can download this entire book for free from the web site.

However, if you wish to purchase the hardcopy, please use
this link to purchase the book through Amazon.com. Your purchase will help support this web site.

http://www.dspguide.com/datacomp.htm

A Delphi VCL that adds support for Zip and CAB files to your Delphi programs. From TurboPower.

http://www.turbopower.com/products/abbrevia/