Author Page
LHA Ver 2.55E English version
LHarc, a precursor to the LHA file utility, became one of the standard file compression/extraction utility in Japan despite its slowness. I am also pleased that some overseas users have taken to using this tool.
RAR 2.06
The RAR Archivever - text UI.
An enthusiastic DCL user had this to say about RAR: The king of archivers, period. Nothing comes close - no laughable zippers, the slow Jar, or the useless program that tries to be a competition for RAR (winace). This is the best! I’ve used RAR since its DOS beginnings, for […]
Streamline Archival Utility Ver 1.00
SAR is a simple archival utility that uses the Huffman algorithms. It has been designed to utilize a single executable for all functionality and has proven to be more effective than most archival utilities on the market today. Although SAR does not have a lot of the commands other utilities have, it more than […]
July 96 Benchmark
A comparison of several popular archivers.
SARJ v1.21 - FreeWare by TSF SoftWare
Create and expand solid archives with the well-known ARJ, able to handle fool archives as it was an ARJ archive (GUS), support of Win95’s long file names, ANSI archive comment allowed, with a fast display, ANSI.SYS *not* necessary, protection against ANSI-BOMB, optimized for a minimal use of the RAM (memory), compatibility with ARJ;
- […]
Unpackit
Packit (Mac pit) file unpacker
UNSIT — StuffIt Archive File Disassembler
UNSIT is a simple utility for PC users to extract files from a StuffIt file. StuffIt files usually appear with the “.SIT” extension. StuffIt is a program for Macs similar to ARC for PCs. It collects several files in a single file and also compresses the data using run length, Huffman, or LZW […]
Secção de Análise de Sinais
A set of links that includes a few data compression sites. This page is from Instituto Superior de Engenharia de Lisboa (a Lisbon Polytechnic school), Portugal, and is in Portuguese. This page contains a link to the Data Compression Group object oriented framework for teaching C++. (Indexed here as The DCG Framework.
zoo - manipulate archives of files in compressed form
Zoo is used to create and maintain collections of files in compressed form. It uses a Lempel-Ziv compression algorithm that gives space savings in the range of 20% to 80% depending on the type of file data. Zoo can store and selectively extract multiple generations of the same file. Data can be […]
Huffman Compression Engine
Huffman Compression Engine with Turbo Pascal Interface.
Arithmetic Coding + Statistical Modeling = Data Compression
An article that explains arithmetic coding, plus a sample program that implements a limited sort of PPM.
Christable C. had these kind words: I have read some other articles, but not clearly known. When reading this article, I find that Arithmetic Coding is easy to know !
Mark Nelson’s FAQ
This contains pointers to some of the frequently asked questions that I receive. Many are related to data compression.
The Data Compression Book
The home page of The Data Compression Book. This is an introductory text oriented towards practical programming.
Please use
this link to purchase the book through Amazon.com. Your purchase will help support this web site.
lszz.c, lzhuf.c, and lzari.c
This archive contains source files lzss.c, lzhuf.c, and lzari.c. They have virtually no documentation, but do a good job of compression. These files were quite influential in their day, particularly in Japan.
Information Theory Research Group
Home page for John C. Kieffer, Dept. of EE, University of Minnesota. Includes course descriptions for classes on data compression and information theory. The course descriptions have links to some papers.
Mpeg Player for UNIX
This is an updated version of the original Mpeg Player developed at UC-Berkeley, with a nice graphical user interface. The versions below were developed here at the University of Minnesota’s Geometry Center.
Claude Shannon (1916 - )
A short but informative thumbnail of Claude Shannon, along with a few links.
Doug McIlroy’s source code page
Links to a documented implementation of a suffix sort. This may not be a compression topic per se, but suffix trees are useful for compressing data.
DCP Research
DCP’s unique compression algorithm, the GCA, achieves significantly higher compression ratios than Stac Electronics’ LZS–typically 20% to 80% better. This difference is only a total of tens to hundreds of dollars for storage situations, but it can save hundreds of dollars a month on a leased communication link.
Welcome to ItComputing Online Research and Development Resources
A page of links, with a substantial number dedicated to data compression.
Sound Compression from an Imaging Company
The PIC Sound Processing System (SPS) uses the ELS arithmetic Coder from Pegasus. Here are the latest raw figures for the 4 most common sound formats. 4 formats using the full dynamic range (-32768..32767 for 16-bit and 0..255 for 8-bit).
Leonid A. Broukhis’ home page
I don’t know the native language being used here, although it appears to be using perhaps a Cyrillic alphabet.
Real-Time Lossless Compression Systems
Some folks at Loughborough U. are working on attempts to integrate data compression more closely with computer hardware. This page has reports on their progress, as well as links to some of their papers.
ELS algorithm
IMPACStar Lossless Compression highlighted in April 1997 DDJ. An arithmetic coding variant known as the ELS coder. This page contains information and a pointer to code and documentation.
Pegasus Medical Compression Toolkit
Pegasus Imaging, a developer of high performance imaging software, today announced its new Medical Compression Toolkit product, a set of compression libraries intended to address specific needs in the medical imaging community. The Medical Compression Toolkit is a set of libraries for various image compression methods which have been adapted for medical use.
DCL reader reported: […]
Waterloo Fractal Compression Project
The Waterloo Fractal Compression Project is part of a general research programme dedicated to the study of fractal analysis and Iterated Function Systems/Fractal Transforms from both theoretical as well as practical perspectives
Fractal Compression Papers Archive
We keep a store of papers originating from
Waterloo
Montreal
External sources.
All papers are in postscript format and are gzipped to save space. The filenames correspond to the naming convention established in my extensive Fractal Bibliography. It probably makes most sense to examine the bibliography first (it is updated regularly), before going on a paper downloading spree.
David Cary’s Data Compression Links
A huge number of links, thoughts, and documentation on a wide variety of data compression topics.
