Author Page
PAQ3N
Matt Mahoney says that with recent improvements by Serge Osnach, PAQ3N does better on the Calgary Corpus than any other open source compressor.
Michael Dipperstein’s Huffman Code Page
Michael Dipperstein describes his personal quest for understanding an implementation of Huffman coding. Full source included.
The page was updated with new source December, 2002.
StubbieMan
A free SFX Maker with some nice features.
NX Developers
This site appears to the home page for a project dedicated to developing an Open Source X Windows compression library.
Adam Clark Finds a Buyer
It appears that the technology promised by Adam Clark has found a buyer. MWC is paying $11 million for the IP that is reputed to be able to create a full-screen video experience over normal voice lines.
DualStream - Near Lossless Audio Compression
DualStream is aimed at filling the big gap between perceptual coding and lossless coding. The goal is to offer real transparent audio coding (not only perceptually transparent) at half or less the bitrate generally used by lossless coding, and also to permit progressive consistent increase of the quality level, until lossless coding is reached. To […]
OptimFROG - IEEE Float
A lossless compressor for audio data stored as IEEE floating point data.
OptimFROG - squeezing the bits out of audio
OptimFROG is a lossless audio compressor. Lots of claims for great performance!
OptimFROG 4.507 is shipping as of October, 2003. Features added since my last report include numerous bug fixes and performance tweaks. The author claims to have superior lossless compression ratios, includes numerous player plugins, and is free for non-commercial use.
Version 4.507 is shipping […]
ImageGear
ImageGear from Accusoft is a super-capable imaging library, available in four different varieties. It supports the normal roster of file types, but also includes some more advanced image and file formats, such as PDF and JPEG-2000.
Version 13 is shipping as of October, 2003.
Star
Star is a free tar program, and boasts that it is the first free tar program to support POSIX.1-2001 extended tar headers.
http://www.fokus.gmd.de/research/cc/glone/employees/joerg.schilling/private/star.html
Algorithms for Triangulated Terrains
by Marc van Kreveld. This paper looks at a method for compressing geographical elevation data.
http://archive.cs.uu.nl/pub/RUU/CS/techreps/CS-1997/1997-32.pdf
Multithreaded Zip Search
A CodeProject article describing a way to search through multiple Zip archives.
Back2zip
A shareware backup program that saves your stuff to the Zip format. We like that.
RF Coding
A paper by Eduardo Enrique González Rodriguez that describes a proposed new method of entropy encoding. Eduardo overcomes some of the problems faced by Huffman coding in certain circumstances, such as a very small alphabet.
RF Coder Source Code
The source code to accompany Eduardo Enrique Gonzalez Rodriguez’s artice on RF coding, his proposed new entropy encoder. (Note that this archive contains his paper as well, so you don’t need to download both.)
AMC-JPEG2000
This product converts your photos to JPEG-2000 format to speed up the process of sending them by mail. And how do your friends view these photos when they get them? Well, it appears that AMC will be happy to give them a free JPEG 2000 viewer.
eZip Wizard
This Win32 archiver is free if all you ever do is unzip files. Creating Zip files is going to require registration and you coughing up a few bucks.
http://www.edisys.com/Products/eZip_Wizard__32_bit_/ezip_wizard__32_bit_.asp
Binary Encoding
A survey paper that covers the current roster of popular encoding algorithms, such as Base64, Base32, Hex, etc.
GNUNetPress Network Compression
GNUNetPress - Network compression client/server software. Compresses data over slow networks to save on the cost of bandwidth. Server is developed for Unix platforms, The client will run on Linux or Windows based PCs.
Redundanz - Lempel-Ziv-Kodierung
A lecture in German on LZ coding.
zipstream, bzip2stream: iostream wrappers for the zlib and bzip2 libraries
This article describes STL-compliant iostream implementations that compress and decompress using the deflate and bzip2 algorithms. It makes it really easy to use compressed streams in your C++ app.
Updated July, 2003, to fix a gzip header problem.
Updated August, 2003 to fix a couple of minor problems.
OpenExif Toolkit
This toolkit lets you access EXIF metadata that has been stored in JPEG files, typically from a digital camera.
OpenTiff
OpenTiff is an object-oriented interface to TIFF formated image files. Unlike other Tiff toolkits, it allows an arbitrary set of tags to be defined and used in a Tiff file.
Building Windows Media Player and Windows Media Encoder Plug-ins
Just what is says, Microsoft’s tutorial on building WMA plugins.
ExpressZIP
ExpressZIP features all of the powerful ZIP tools you’ll ever need in an easy to use and attractive interface and comes complete with built-in Wizards to walk you through creating ZIP and EXE (self extracting) archives.
Version 4.0 shipped in September, 2003.
The ExifReader class
A .NET library for reading EXIF metadata from JPEG files.
Zip-I-Mage
This archiver is built specifically for support of image archiving. Supports popular formats such as JPG and BMP.
Open Source ARJ
The well-respected ARJ archiver is now available as Open Source software. This portable version targets DOS, OS/2, Linux, and FreeBSD. See the project home page for binary versions of previous commercial/shareware versions. (These versions were free for personal use, but not commercial.)
ARJ 2.78/3.10 build 17 is shipping in September, 2003.
BriefLZ
An Open Source library that implements an LZSS algorithm, designed for speed. ANSI C, with 16- and 32-bit x86 assembler versions available as well.
imgtops
This open source Linux project converts image files (JPEG, GIF, PNG, etc.) to Encapsulated PostScript, in what is supposed to be an efficient manner.
