data compression link collection

Various Languages

Home page of MPEG2/MPEG4 Audio on Fraunhofer IIS site

Here Fraunhofer IIS institute provides description of it`s AAC related technologies.


Posted in June 25th, 2007

Arithmetic Coding revealed - A guided tour from theory to praxis

An updated and translated version of our German paper “Proseminar Datenkompression - Arithmetische Kodierung” from 2001. To the best of our knowledge, it is the first comprehensive paper that describes the whole way from the basic principles of AC up to a simple implementation, fully documented with C++ source code.

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Posted in November 6th, 2004


Yet another Windows archiving program. PowerArchiver comes with a nice long list of supported formats: ZIP, CAB, LHA (LZH), TAR, TAR.GZ, TAR.BZ2, BH, RAR, ARJ, ARC, ACE, ZOO, GZ, BZIP2, XXE, and UUE. Plus a built-in viewer for JPG, GIF, and a few other formats.

Release 9.0 of PowerArchiver shipped July, 2004.

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Posted in July 16th, 2004

Taking Advantage of libpng

Reputedly an excellent set of resources for using libpng - but don’t take my word for it - my Japanese is non-existent.


Posted in July 10th, 2004


Zipgenius is yet-another-archiver. Supports 21 different compression formats, plus a pretty long list of extras, such as FTP support, email, backup functions, and more. The long list of features might make you expect a price tag, but ZipGenius is in fact free!

Version of ZipGenius is shipping as of June, 2004.


Posted in June 14th, 2004


There are two programs named SimplyZip. This is the free one from Germany. This program has an awesome list of supported archives formats.

Version 1.1 is shipping as of June, 2004


Posted in June 14th, 2004

PeX home page

This is reputedly the home page of the PeX executable cracker. However, the fact that the page appears to be in Polish keeps me from saying more than that.


Posted in June 13th, 2004


A free self-extractor bundler, it can take a standard Zip file and convert it into a self-extracting EXE, or take a self-extracting EXE and turn it into a Zip file. Free for non-commercial use, lots of nice new features in the 2.0 release.

Version 2.0 is shipping as of May, 2004.


Posted in May 31st, 2004


Yet another free Zip program with the usual cast of features. Supports a pretty good variety of archives, runs under Win32 only, etc.

Filzip 3.0.1 is shipping in May, 2004.

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Posted in May 15th, 2004

Compression and Encryption Sources

Links to a variety of lossless coders, includes source for Huffman, arithmetic, LZSS, and other compressors.

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Posted in May 1st, 2004


AVInfo is a utility for displaying AVI and MPEG (1, 2) information. It returns the length of a clip, FPS, resolution, codec, audio and video bit rate, number of key frames, sound parameters, and the number and type of streams, including detailed information for each, generating a filelist with statistics.


Posted in April 19th, 2004


GermaniXEncoder is a universal Transcoder for various sound formats like MP3, MP2, Real Audio, WMA, Ogg Vorbis, ALF2CD, DSP, GSM, G.721, G.723, G.726, RAW, PCM, ADPCM, uLaw, aLaw, MPC, and Monkeys Audio. In addition, the Encoder has a transformer for some transforming features, an Audio Recorder for recording from all input sources to mp3, mp2, pcm, adpcm, wma and ogg-vorbis. You can also split large MP3 files with their CUE sheets into songs.

Version 1.80.1195 RC2 was shipping as of Februaru, 2002.


Posted in February 22nd, 2004


PentaZip has a very nice feature set, supports advanced encryption, large archives, Windows shell integration, and all the other good stuff you’ve come to expect. Also supports a wide variety of languages.

Release shipped in November, 2003

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Posted in November 26th, 2003

MacLHA support

This web site is run by the author of MacLHA, a drag and drop version of LHA for Mac OS. You can also get access to a drag and drop LHA expander for Mac OS here.


Posted in November 24th, 2003

DropLHA for Mac OS/X

A site that has a port of a drag and drop version of LHA to Mac OS X. My Japanese referrer tells me this version does not support MacBinary so resource forks will be lost by this program.


Posted in November 24th, 2003


The software reviewer at the SlaughterHouse speculated that commercial developers of zip programs ought to just pack it in when they see how good QuickZip is. If you agree or disagree, why not post an evaluation here so we can benefit from your experience? It seems to be free, plus has support for Chinese and several European languages.

Release 3.05 is shipping as of November, 2003.


Posted in November 16th, 2003


This free Zip manager program supports a raft of archiver formats, has full shell integration, and includes support for the Zip64 extensions.

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Posted in November 9th, 2003


Zipserver is a little HTTP server that serves up static documents from inside Zip files. Great way to put manuals or archived documents on line, don’t you think?


Posted in November 8th, 2003

Redundanz - Lempel-Ziv-Kodierung

A lecture in German on LZ coding.

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Posted in September 28th, 2003

JPEG 2000 Dropper

A free Max OS X program that converts your images to JPEG 2000.

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Posted in August 11th, 2003

Avi-Ogm Info

This Win32 app probes your AVI files and returns a nicely formatted GUI telling you all sorts of interesting things such as sample rate, codec used, framerate. Oh, and it seems to be written for the French speaker.


Posted in August 8th, 2003


Supplies you with detailed info about the attributes of all sorts of media files, naturally including MP3, AVI, WAV, MPEG2, and much, much more. Looks to be Win32 only.


Posted in August 8th, 2003

ShipInBottle Archiver

This is a Russian language web site, so I’ll have to apologize in advance for any mistakes. As far as I can tell, this is a PPM-based archiver. I can’t tell if it’s free or not, so I’m listing it as both!


Posted in June 21st, 2003

The GSLib image compression library

Alexander Simakov has created a streaming, DCT-based, lossy compression library that works on gray scale images. This is a shareware library that works with Win32 programs. Registered users get source code, samples in several languages, and help files in English and Russian.


Posted in June 20th, 2003

C Library to search over compressed texts

A team from the University of Pisa in Italy have created a set of two libraries to demonstrate the ability to perform searches in compressed text. The code is packaged as two LGPL libraries: HuffwLib and CGrepLib, and sample programs are available on the site for demonstration purposes.

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Posted in April 15th, 2003

Dmitry Shkarin

Dmitry Shkarin is the author of the PPMD compressor. His homepage has links to to versions A-I of the compressor as of April, 2003. This page is in Russian, but I find that running it through
BabelFish produces a usuable translation.


Posted in April 14th, 2003


Zipbit is yet another inexpensive Win32 archiver with support for a wide range of archive types. Creates SFX files, integrates with Windows Explorer, and has localized versions for English, German, and Russian.

Version 1.05 is shipping as of April, 2003.


Posted in April 14th, 2003

Grundlagen des Burrows-Wheeler-Kompressionsalgorithmus

This is another German preprint of Jürgen Abel describing the principles of the Burrows-Wheeler Compression Algorithm. An
implementation of a BWT based compressor with a compression rate of 2.25 bps on the Calgary Corpus is presented. The paper will be
published in the German journal “Informatik - Forschung und Entwicklung”, Springer-Verlag Heidelberg, Association for Informatics
(Gesellschaft für Informatik eV.)

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Posted in April 14th, 2003


A DirectShow filter which will allow you to play AVI files containing AC3 encoded audio. A nice stream of releases with steady improvement.

Version 0.66b is shipping as of March, 2003.


Posted in March 26th, 2003


The author of this program, Philippe Laval, says You are looking for an application to encode your sound files in MP3, DropMP3 is done for you.. The program runs on MacOS, uses the LAME encoder, and is released under the GPL. Note that the web page is more or less duplicated in English and French.

Version 1.0.6 is shipping as of March, 2003.


Posted in March 26th, 2003