Author Page
Batch Zip Toolkit
Despite the name, this is simply an archiving program that supports the usual gamut of compression formats, including Zip, RAR, ACE, etc.
Version 3.00 seems to be shipping in December, 2002.
Teddy Turner Mixed Up In Compression Lawsuit
Teddy Turner, son of CNN mogul Ted Turner, was apparently named in a lawsuit in 1999 over an alleged misrepresentation of compression claims. A Florida company named Vision Tek claimed it could pump video over normal phone lines at high speeds, but was not able to satisy its investors, leading to a court case.
http://jacksonville.bcentral.com/jacksonville/stories/1999/03/15/story1.html
Xipped
Advertised as The world’s most versatile and powerful archive utility! Available as shareware or free w/ads. Supports various formats, does conversions, works with the Windows shell.
JPEG Library
Intel has a C/C++ JPEG library that works with Visual C++ under Win32. It would appear that their motivation is to distribute code that is optimized for the MMX extensions in their processor. License agreement has a few points that should be examined, but essentially it appears to be free. Please correct me if I’m […]
http://developer.intel.com/software/products/perflib/ijl/index.htm
Maxcode Archive Download Page
Maxcode has a selection of C/C++ code here related to archiving and compression.
http://www.maxcode.com/nuke/download.php?op=viewsdownload&sid=32
Add GIF-animation to your MFC and ATL projects
Decoding GIF files and displaying them without help isn’t particularly easy. Add animation to the task and you’re looking at a ton of work. Fortunately, this MFC-compatible set of classes on the CodeProject web site does the heavy lifting for you.
CPicture - The Yovav (Horror) PictureShow
Straightforward code compatible with Visual C++ and MFC for decoding and displaying JPEG, GIF, BMP, and a few other types of files.
JPEG Compression Algorithm and Associated Data Structures
A paper by Mark D. Schroeder at the University of North Dakota. This paper talks a bit about implementation issues for JPEG.
Location Based Encoding - LBE
Chitaranjan P.S., Arun Shankar, and Niyant .K posted a description of a new coding scheme called LBE on the web. It’s interesting, but I’m not sure that it appears to have any serious advantages over current state of the art.
ARJ for Linux and FreeBSD
Andrew Belov, from ARJ Software Russia, has announced the release of ARJ for Linux and FreeBSD. Links on this site to the OS/2 version as well, if you’re in the market for that.
Compressed Virtual Memory
Rodrigo Castro has an interesting project going at the University of Sao Paulo in Brasil. Rodrigo is integrating compression with the virtual memory system of Linux. By storing compressed pages in RAM, he hopes to improve overall system performance. The goal is to read and write fewer pages to disk. See the full details on
his […]
Aladdin Expander
Aladdin Systems, makers of the popular Stuffit program, have a free program called Expander that can be used to extract files from many popular archive formats, including Zip, Sit, and more.
IEEE Information Theory Society Web Portal
The home page for the society. Links to newsletters, conferences, tutorials, abstracts, and other miscellaneous fun things.
Carryless Rangecoder
Mikael Lundqvist has adapted Dmitry Subbotin’s C++ rangecoder to C. Michael says it is simple and fast.
One DataCompression.info commented that some more documentation would be helpful.
Shorten Utilities (shnutils)
shnutils is a collection of 3 Perl scripts developed to assist in the process of using shorten to trade digital music. These scripts, which run on both Linux and Windows, facilitate compressing WAV files using shorten, and also in creating and verifying MD5 hashes.
Advanced Encryption Package 2001
This archiving package works with zip files, creates encrypted archives, wipes files, etc.
Huffman-Ricardo Coding
Daniel Ricardo has a new algorithm for generation of Huffman codes. He claims superior performance and small memory footprint. Algorithm description here, but no code.
LZO Streaming Code
Tom St Denis posted an article on comp.compression announcing free source code for streaming to and from files using the LZO engine. This link takes you to stream.c, modify it slightly to get stream.h, the corresponding header file.
Pandora - Markup metadata inside JPEG 2000 files
Pandora is a web-oriented application of JPEG 2000. It uses web pages as a novel example of XML metadata. A multi-image, multi-page website can be stored within a single JPEG 2000 file, and viewed using an ordinary web-browser.
PKWare Data Compression Library Format
In this comp.compression posting, Ben Rudia-Gould opens up the compression format used by the PKWare Data Compression Library. This is the only place I have ever seen this information disclosed; PKWare has certainly not done so.
Hardware Support for MP3Pro
EE Times reports that both TI and SMT are making chips that support the new MP3Pro format, clearing the way for its inclusion in portable audio devices.
The Glicbawls page
Glicbawls is a lossless and/or near-lossless image compression algorithm that apparently does really well on gray-scale images but perhaps not as well on color. This link points to an archived page, as the original has disappeared from the net. As a result, links on the page may or may not work propery
http://web.archive.org/web/20020604145417/http://byron.csse.monash.edu.au/glicbawls/index.
html
On variants of block-sorting compression using context from both the left and right
A technical note from Mike Burrows regarding a variation on block sorting.
Differences Between Microsoft and Apple ADPCM Files
Apple has published a tech note describing the differences between these two file formats, which on the face of it ought to be identical.
On2 Technologies VP3.2 Open Source Project
These folks are hard at work on an open source video codec. VP4 appears to be a commercial effort, VP3 seems to be free.
One DataCompression.info user had this to say: Impressive effort by both ON2 and Xiph. Something has to replace MPEG with its rapidly deteriorating technnology and efficiency. This one has the potential but […]
libcomprex - Comprex (de)compression library
From the site: The libcomprex library transparently handles automatic compression and decompression of files. The API is similar to C’s built-in file access functions, which provides a smooth transition to libcomprex. libcomprex can also open uncompressed files, making it a good replacement for the native file access functions.
Some Summary
This web page explains a proposed categorizaton of various data compression methods.
Sorting the matrix of two-sided contexts
This article describes a variant on BWT that doesn’t use the cyclical rotations of strings used for BWT, but a different scheme. DCL reader points to a Burrows paper showing that this scheme is suboptimal.
ArjFolder
ArjFolder is a utility that makes it easy to read or write ARJ and ZIP files, and to read a slew of other file types. Sit can be viewed in French or English.
PICTools JPEG2000
This is the PicTools JPEG2000 SDK, which lets you drop JPEG2000 compression and decompression into your C/C++ programs. Pegasus Imaging makes quite a few compression library products. In this particular case, it appears they enlisted the help of
Algo Vision plc to develop this product.
