David describes his work creating a bijective LZW compressor. (See this and other pages of David for details on what he means by bijective.) The page includes C++ source.

read more from " David Scott’s Bijective LZW Compression Methods "

VisioWave is offering simple, modular, integrated and open-ended high-quality and reliable hardware and software solutions for compression, processing and real-time transmission of very high quality video over any network (IP, ATM, ADSL, cable, wireless, …).

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HP offers some free JPEG-LS software, including a Windows DLL, PhotoShop plugin, and reference executables good on several platforms, including Windows, Linux, Solaris, and of course, HP-UX.

One anonymous reader dissed the package with this comment: Not particularly user friendly.

read more from " LOCO-I/JPEG-LS Software Download Page "

DanG presents an extended yet simplified interface to querying, filtering and extracting multiple files from a zip archive.

read more from " C++ wrapper for Gilles Vollant’s Unzip API "

A nice set of links to AudioCoding information. Since this is a Wiki site, it is highly collaborative - registered users can provide updates and modifications to the site at will. (I think.)

read more from " AudioCodingWiki "

MotionWavelets is a software video codec that delivers real-time, high-quality video compression to the PC-based digital video user. Powered by a wavelet-based compression engine optimized for MMX processors, MotionWavelets compresses 640×480, 30 frames per second video with VHS quality, in real time on a PII/450MHz PC. MotionWavelets will compress greater than 60 fps […]

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Supplier of data comrpession libraries to use with FoxPro. Includes FOXSQZ, an archiving and compression library, COMP5, a compression library, and JavaSQZ, a data compression library for Java.

read more from " Master Creative Software "

mgzip is a program that makes use of SMP machines and zlib to use as many processors as you have to quickly compress files into gzip compatible format. mgzip only compresses; gunzip must be used to uncompress the resultant file. I have been able to compress files three times faster than standard gzip on […]

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A Technical Documentation bulleting from TI that answers the question “What is a Compressed Postscript (.psz) File?”

read more from " Compressed Postscript Documents - FAQ "

WSQ by Aware is our implementation of the Federal Bureau of Investigation’s Wavelet Scalar Quantization fingerprint compression standard. WSQ by Aware is the industry’s highest performing implementation of the FBI’s Wavelet Scalar Quantization (WSQ) digital fingerprint compression algorithm. WSQ is a wavelet transform-based compression standard, developed by the FBI for compression of digital fingerprint images.

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A company that makes PhotoJazz, a lossless compression plug in package that they describe as having Breakthrough lossless photo-quality compression of stills and movies for archival, print, and the Internet. Version 2.0 supports Mac and Windows, Photoshop, QuickTime, and Quark. You can download the Reader for free and try it out.

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Bob Carpenter has created a nice Java package that implements a PPM/arithmetic coding compression system. This page includes links to the source code, javadocs, and a fair amount of tutorial material. Very complete!

read more from " Compression via Arithmetic Coding in Java "

bwtzip is an ongoing project, distributed under the GNU General Public License, to implement a Burrows-Wheeler compressor in standard, portable C++. It is research-grade in that it is highly modularized and abstracted, so that it is simple to swap out parts of the compressor without affecting anything else. This makes it easy to experiment with […]

read more from " bwtzip: A Linear-Time Portable Research-Grade Universal Data Compressor "

These guys are claiming a quantum leap in image compression! It looks like you can get a 30 day free trial of this product. The affiliate marketing program for MyPhotoZip is kind of goofy, see more about it at ecomecom.net.

Visitor Tim A had this to say: A demo of MyPhotoZip is available on CNET, ZDNet […]

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A pure Ada decompression library. You can extract files from zip archives using this library, although you can’t create them.

Release 11 shipped in November of 2002.

read more from " UnZip-Ada "

This wrapper class provides you with simple access to the gzip compression methods in zlib. You can compress and decopress to/from memory (including strings) to files. Looks promising. Release 1.1 was released 12/2002, although I can’t tell what if anything has changed.

read more from " CGZip, a C++ wrapper for gzip methods "

Jürgen is the proprietor of

www.data-compression.info,
an excellent resource for developers and researchers. Jürgen has a good supply of links to papers, conferences, books, etc. on the site, as well as executables and source for ABC, a freeware BWT compressor he wote in Delphi.

read more from " Jürgen Abel "

Will McKee wrote some Huffman code in C++. Take a look.

Update: Will reports that he has improved the documentation in this package, as well as adding a new function.

read more from " Will’s Huffman Demo "

Will McKee has released this as freeware - includes complete source to a string substitution compressor. From the description it sounds as though it’s variant on LZSS, but I’ll defer to anyone willing to do a real analysis.

read more from " McKee’s Directed Acyclic Graph Compression "

Nellymoser is the leading provider of proprietary speech and audio software technology and solutions in the areas of compression, modification, synchronization and conversion. Our products improve speech and audio quality and efficiency in bandwidth-constrained environments while creating more immersive, interactive environments for your applications and services.

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The Asao libraries from Nellysoft have been designed specifically to address the need for a very small footprint, low bandwidth speech and audio compression. Asao will operate at a variety of bit rates (12/16/24/32 Kbps). This new technology can be rapidly harnessed for applications such as streaming over mobile data networks, Internet radio and […]

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The Sase libraries fron Nellysoft offer flexible compression options for both embedded and data packets based compression implementations It can operate in either a single bit rate or a multi-rate mode, offering compression rates (1.8/3.2/6.4 Kbps) to suit your application or the changing environment of packet based networks. Sase has the ability to switch bit […]

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David Scott presents an implementation of Vitter’s dynamic Huffman compressor, adapted so that it is bijective. Don’t know what bijective means? Check out David’s home page for more details.

read more from " David’ Scott’s Bijectified Vitter Adaptive Compression "

The folks at SpeedProject in Germany have created a developer’s toolkit that gives you full access to the SQX format archives created by their Squeez and SpeedCommander utilities. The toolkit and DLLs are completely free.

read more from " SQX Archiver! "

This is a preliminary shot at creating an open source BWT compression engine. Things look very preliminary at this point with just a couple of files available for download and not much message traffic.

read more from " BWTCoder: Industrial strength BWT compression "

Google’s directory entry point for test images used in data compression.

read more from " Google - Compression Test Images "