Author Page
Statistical Coders
A group of statistical coders from Charles Bloom. This includes several different entropy encoders, including Huffman, Adaptive Huffman, CACM Arithmetic coding, and a Skew Coder.
Clemens Valens’ homepage
Clemen has some pages here that discuss Wavelet theory in general, as well as specifics on the Fast Lifting Wavelet Transfrom and Embedded Zerotree Wavelet Encoding.
Kolmogorov, Andrey Nikolayevich
A short bio of the famous Russian mathematician. His name lives on in comp.compression and elsewhere due to his seminal work in the study of complexity.
Our wavelet technical reports and preprints
A set of pointers to many technical articles and papers on wavelets. A few broken links, but lots of live pointers to postscript papers.
http://www.stats.bris.ac.uk/pub/reports/Wavelets/Wavelets.html
Data Compression Program for VM/ESA
DATA COMPRESSION PROGRAM for VM/ESA enables VM customers to automatially (sic) and transparently compress and expand CMS minidisk file data. This capability can help reduce DASD utilization, load on the I/O subsystem, and staff time spent managing minidisk space and “disk full” conditions.
From your friends at IBM.
Publications of Gordon V. Cormack
A set of links to Cormack’s publications. Papers germane to this page include one on DMC and arithmetic compression. Pointers to many other data compression articles which are unfortunately not linked to this page.
Yahoo links to compression companies
Links to companies engaging in commerce related to data compression. A moderate-sized set of links. At last check, in addition to direct listings, contains subtress for Commercial Products, Fractal Compression, and a couple of others.
http://www.yahoo.com/Computers_and_Internet/Software/System_Utilities/Compression/
Yahoo links to compression
A suprisingly sparse set of entries. You would think Yahoo could do better.
Micco’s Home Page
Home of LHMelt, UNLHA32.DLL, UNARJ32.DLL. All text on this page is in Japanese, except for a single link pointing to English information on UNLHA32.DLL.
MP3Tech.org
This site is dedicated to the MP3 standard. You will find here information about the MP3 standard and upcoming audio compression techniques, tests, MPEG source code.
PKWare problems with PKZIP 2.0
During the development of PKZIP v. 2.0 for MS-DOS, PKWARE has
discovered hardware faults in newer 80386 & 80486 computers.
These faults can cause anomalies in the operation of PKWARE
software as well as other software.
PASJPEG
PASJPEG is a port of the sixth public release of the IJG C source (release
6a of 7-Feb-96) [3], that implements JPEG baseline, extended-sequential, and
progressive compression processes to Turbo Pascal 7.0 for DOS (TP). The code
has been tested under Delphi 2.0 [6], it can be ported to other Pascal
environments, since many compilers try to be compatible […]
ftp://ftp.simtel.net/pub/simtelnet/msdos/turbopas/pasjpg10.zip
TinyHAP v1.02c
Tiny HAP is based on Harald Feldman’s HAP & PAH 3.0, and is distributed freely. The source code is not identical and should run 25% faster.
ARC - File Archive Utility V 6.02
ARC is used to create and maintain file archives. An archive is a group of files collected together into one file in such a way that the individual files may be recovered intact. ARC automatically compresses the files being archived so that the resulting archive takes up a minimum amount of space.
ARCE Version 4.0g
Use ARCE to extract files from an ARC archive file. ARCE is a freeware package.
Charles Bloom’s binary executables
Includes WaveVideo, PPMZ, LZP, and WaveCode. Charles has source for most of this stuff available elsewhere on his page.
International Symposium on Information Technology: Coding and Computing ITCC 2000
Sponsored by IEEE Computer Society March 27-29, 2000, Las Vegas, Nevada
Topics include, but are not limited to, the following:
Digital Image Processing Data Storage Platforms
Document Image Analysis Optical Data Transmission
Data Compression New Architectures for Multimedia
Authentication of Video and Audio Processing
Data Graphics and Video Hardware
Multimedia Computing Error Control Codes
Hybrid Source/Channel Coding Video and Audio Codec Design
Systems […]
What about patents on Data Compression algorithms?
The comp.compression FAQ attempts to shed some light on this topic.
http://www.faqs.org/faqs/compression-faq/part1/section-7.html
Image Viewers with PNG Support
Tons of links to software here
Compression Algorithms for Real Programmers by Peter Wayner
“. Compression Algorithms for Real Programmers describes the basic algorithms and approaches for compressing information so you can create the smallest files possible.”
Please use
this link to purchase the book through Amazon.com. Your purchase will help support this web site.
Image Compression using Backprop
From the site: Computer images are extremely data intensive and hence require large amounts of memory for storage. As a result, the transmission of an image from one machine to another can be very time consuming. By using data compression techniques, it is possible to remove some of the redundant information contained in images, requiring […]
http://neuron.eng.wayne.edu/bpImageCompression9PLUS/bp9PLUS.html
The African Chief
The African Chief has a variety of compression programs listed here, including units for Delphi and Turbo Pascal. Techniques supported include LZSS and Zip. Most appear to include source.
WPLIB: WAVELET PACKET LIBRARY ROUTINES, UTILITIES, AND APPLICATIONS
DATA FORMATS AND COMPRESSION ALGORITHMS USING WAVELET PACKETS Version 1.4, 24 May 1990. Mladen Victor Wickerhauser, Numerical Algorithms Research Group, Department of Mathematics,Yale University,New Haven, CT 06520. Includes some documentation.
Multiply-free Arithmetic Coding Implementation
Multiply-free Arithmetic Coding Implementation - Compression version 0.0.0
Gordon V. Cormack Feb. 1993
University of Waterloo cormack@uwaterloo.ca
This source code has some traditional freeware licensign terms embedded in the code
H.263/H.263+ Research Library, Release 0.2
The package consists of the following modules:
H.263/H.263+ codec, C source code
Input and Output Modules, C source code
Configuration file parser/interpreter, C source code
Graphical User Interface, MS-Windows object code only
Support tools, C source code
All necessary header and resource files
Makefiles and Project files for UNIX and MS Developer Studio
Executables for MS-Windows
DCL User comment:Not as easy to download from […]
Speech Coding
What appears to be a course or lecture outline on speech coding.
In-place Huffman code length calculation
An in-place Huffman code length calculation demonstration from Alistair Moffat. The abstract of that paper may be fetched from this location.
Image set used in ACT
A SET of 23 images totalling 27,133,146 bytes. The file type is RAS, does that mean that the files are a simple raster dump? I’m not sure. These files are listed in a few different places as being used in benchmarks.
Managing Gigabytes, 2nd Edition - Witten, Moffat, and Bell
The second edition of Managing Gigabytes: Compressing and Indexing Documents and Images by Ian H. Witten, Alistair Moffat, and Timothy C. Bell, is now available (May 1999), published by Morgan Kaufmann Publishing, San Francisco, ISBN 1-55860-570-3.
Please use
this link to purchase the book through Amazon.com. Your purchase will help support this web site.
