| Programming Source Data Compression
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This page contains sources of various archivers and data compression algorithms.
Submitted Dec 24, 2003
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| Adaptive Huffman coding
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This page describes adaptive Huffman coding, the adaptive one-pass method that can be used for data compression.
Submitted Dec 24, 2003
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| JPEG2000 wavelet compression
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An article on JPEG2000, a new algorithm that compresses images up to 200 times with no appreciable degradation in quality. The JPEG2000 spec, which will become ISO 15444 when it's officially approved in 2001, uses wavelet transformations instead of Fourier transforms to achieve the performance gain.
Submitted Dec 24, 2003
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| Dr.Dobb's Data Compression
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This section of Dr.Dobb's Journal is dedicated to Data Compression, it contains links to articles, papers, programs and more.
Submitted Dec 24, 2003
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| David's Compression page
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This site describes adaptive huffman compression using examples, it also contains source code of the algorithms.
Submitted Dec 24, 2003
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| LOCO-I/JPEG-LS
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JPEG-LS is the new lossless/near-lossless compression standard for continuous-tone images, ISO-14495-1/ITU-T.87. The standard is based on the LOCO-I algorithm (LOw COmplexity LOssless COmpression for Images) developed at Hewlett-Packard Laboratories. This page allows you to download a software implementation of JPEG-LS.
Submitted Dec 24, 2003
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| Data Compression Techniques
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The site contains papers on data compression, source code of compression algorithms and utilities, and links to other compression resources.
Submitted Dec 24, 2003
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| GT Technology, inc.
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GT Technology Inc. provides consulting services in the field of error correction (ECC): hardware design of fast error correcting codes: Reed-Solomon codes, error correcting codes for memory; still image compression, motion video compression: JPEG, MPEG, wavelet compression (wavelets); speech compression and audio compression.
Submitted Dec 24, 2003
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| JJ2000 Homepage
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This site is dedicated to implementation of the JPEG2000 standard in the Java language.
Submitted Dec 24, 2003
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| Lossless Data Compression Program: Hybrid LZ77 RLE
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Pucrunch is a Hybrid LZ77 and RLE compressor, uses an Elias Gamma Code for lengths, mixture of Gamma Code and linear for LZ77 offset, and ranked RLE bytes indexed by the same Gamma Code. Uses no extra memory in decompression. This page describes LZ77 and RLE and contains source codes and executables.
Submitted Dec 24, 2003
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| AHA - FEC/TPC & Data Compression Solutions
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Advanced Hardware Architectures offers state of the art devices for applications in digital communications, data storage, and digital hard copy. AHAŇs Forward Error Correction (FEC) products are used in a wide variety of communications systems. AHA's lossless data compression products are widely used in both data storage and digital copiers.
Submitted Dec 24, 2003
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| Aware, Inc. - Compression Software
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Aware, Inc., provides JPEG2000 codecs in a variety of formats, including toolkits, SDK's, plug-in's, component software and source code that can be optimized for a variety of platforms. The company has been developing wavelet-based compression algorithms since 1987 and also provides specialized software for fingerprint, facial, seismic and remote sensing applications.
Submitted Feb 04, 2001
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| Binary Tree Predictive Coding
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Binary Tree Predictive Coding (BTPC) is an efficient compression method for still images. This site describes the BTPC method using examples of images, source code and executable files implementing BTPC algorithm.
Submitted Dec 24, 2003
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| Binary Tree Predictive Coding version 5
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BTPC version 5 supersedes the earlier version on this page (same author). It incorporates various improvements.
Submitted Mar 11, 2003
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| BitJazz Lossless Image Compression
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BitJazz Inc. develops cutting-edge algorithms and software for the digital graphics and audio industries, specializing in applied information theory. Their algorithms include unrivalled lossless image compression for photo-quality images; optimal signal determination for damped sinusoids; efficient longest-substring determination; complex exponential splines; lossless color-space conversion; fast NURBS-to-Bézier spline conversion; fast recursive rotation; and fast 3-D lighting.
Submitted Dec 24, 2003
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| Doug Jones's compression and encryption algorithms
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This article consist of two parts: Splay Tree Based Codes and Encryption as an Introductory Programming Exercise. The page contains source code in C and exercises.
Submitted Dec 24, 2003
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| Range Encoder
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The range encoder is a fast multisymbol entropy coder licensed with the GNU general public license. Its compression is within 0.01% of arithmetic coding. The page has information on Range Encoders' algorithms along with source code.
Submitted Dec 24, 2003
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| TCompress Data Compression Components
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TCompress provides native components for Delphi and C++ Builder supporting easy creation of multi-file compressed archives, as well as database, file and in-memory compression using streams. TCompress comes with an extensive demonstration, many source examples (including how to make a self-extracting EXE) and comprehensive help and keyword files. Supports all versions of Delphi and C++ Builder. There is a free upgrade and full version that requires registration.
Submitted Dec 24, 2003
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| The Compression Site
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This site is dedicated to compression utilities. It has software for various OSs, benchmarks and Compression FAQ.
Submitted Dec 24, 2003
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| The Data Compression Book
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This authoritative guide details various data compression techniques used on personal and mid-sized computers. It explores different data compression methods, explaining the theory behind each and showing C programmers how to apply them to significantly increase the storage capacity of their system. Each technique is fully illustrated with complete, working programs written in portable C.
Submitted Dec 24, 2003
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| Universal Source Encoding for Science Data
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Universal Source Encoding for Science Data (USES), originally developed as Universal Source Encoding for Space (aka, USES), is a lossless data compression technique best suited for science data of various instruments. This site describes USES and offers some software for it.
Submitted Dec 24, 2003
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| zlib Home Page
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zlib is designed to be a free, general-purpose, legally unencumbered - that is, not covered by any patents - lossless data-compression library for use on virtually any computer hardware and operating system.
Submitted Dec 24, 2003
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| Zzip's website
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This is the home page for Zzip, a new powerful compression tool. Zzip, a new compression tool still under development, can compress files with a very high compression ratio. Compared to Winzip 7.0, you can gain at least 15%. Its compression algorithm is mainly based on the Burrows-Wheeler Transform method developed by Mike Burrows and David Wheeler.
Submitted Dec 24, 2003
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| A corpus for the evaluation of lossless compression algorithms
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A large number of quite different lossless compression systems have been proposed and implemented over the years. Normally some sort of evaluation is provided by authors to establish the relative merits of their system. This paper investigates how the reliability of these evaluations can be ensured, particularly the repeatability of experiments, in line with scientific method.
Submitted Dec 24, 2003
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| AIPNL Data Compression Pages
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The site contains information on various compression techniques: UC2, ARC, ARJ, LZH, RAR, ZIP, UCRYPT, JPEG, MPEG, etc., especially AIPNL UltraCompressor developed by AIPNL.
Submitted Dec 24, 2003
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| Archive Comparison Test 2.0 (ACT) by Jeff Gilchrist
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This site is dedicated to comparison of various compression programs for Windows/DOS and Macintosh. Tests were performed on various file formats with a really impressing diversity of archievers.
Submitted Dec 24, 2003
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| ARJ Software, Inc.
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The site of ARJ Software. This site contains ARJ and JAR information, FAQs, reviews, software, etc.
Submitted Dec 24, 2003
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| Arturo's Compression Vault
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This page presents a lot of articles about compression. The main idea is that the information is viewed offline (though it can be viewed online) so you spend less time and money while learning. You'll find all the information zipped, with the date of the last update, of course you'll also find the articles unzipped if you want to see what are you going to download.
Submitted Dec 24, 2003
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| Ascent Solutions Inc.
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ASCENT SOLUTIONS, Inc. (ASi) is a software developer and reseller, specializing in the creation and distribution of multi-platform versions of data compression products, transfer utilities, AS/400 automation management and Internet solutions. Among their products are such familiar names as PKZIP, MultiZip, BlazeMarks!, Target2000, RevSoft, XPress, and ZMOD.
Submitted Dec 24, 2003
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| Bernie's TMW0.51 Page
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TMW is a program for losslessly compressing greyscale images that gives world class compression ratios, at the cost of being tremendously CPU intensive. The current version is TMW_0.51, and is still completely experimental.
Submitted Dec 24, 2003
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| Calibre - CxZipCOM
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CxZipCOM is internet enabled zip/unzip COM component with events support. Your application can do zipping and unzipping with full control and speed. It also supports events, FTP, HTTP and emailing.
Submitted Feb 10, 2003
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| Caravian
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Caravian's Piecewise-Constant Image Modeling technology (PWC) is ideal for delivering rich visual content to limited clients over narrow bandwidth channels. PWC delivers the best available compression of palettized graphics and does so with less CPU and memory overhead than GIF! Further, since PWC encode and decode are symmetrical, PWC also is ideal for on the fly encoding of custom content.
Submitted Dec 24, 2003
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| comp.compression FAQ
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This page is a set of Frequently Asked Questions (FAQ) for the groups comp.compression and comp.compression.research. It consist of 3 parts. Part 1 is oriented towards practical usage of compression programs. Part 2 is more intended for people who want to know how compression works. Part 3 is a long (but somewhat obsolete) list of image compression hardware.
Submitted Dec 24, 2003
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| Compression Consulting Schindler
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Compression consulting Schindler offers its data compression knowledge to you. They help choose a method that fits your needs or develop a new solution if there is none. They also have free giveaways: a compressor, coder, etc.
Submitted Dec 24, 2003
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| Compression Pointers
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This site is dedicated to compression of audio, video, images etc. Compression resources, conferences, and some research groups and companies, are listed towards the end of this page.
Submitted Dec 24, 2003
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| Data Compression Papers
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This is the list of Jeff Vitter's papers concerning Data Compression. The publications are stored in both gzip-compressed postscript format and in Adobe pdf format.
Submitted Dec 24, 2003
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| Data Compression Article
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This paper surveys a variety of data compression methods spanning almost forty years of research, from the work of Shannon, Fano and Huffman in the late 40's to a technique developed in 1986. Concepts from information theory, as they relate to the goals and evaluation of data compression methods, are discussed briefly. A framework for evaluation and comparison of methods is constructed and applied to the algorithms presented. Comparisons of both theoretical and empirical natures are reported and possibilities for future research are suggested.
Submitted Dec 24, 2003
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| Data Compression Reference Center
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This site is dedicated to data compression. There is lots of stuff concerning compression algorithms, their hardware implementations, glossary of the most used data compression terms, Frequently Asked Questions about data compression, and more.
Submitted Dec 24, 2003
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| DC Micro Development
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DC Micro Development specializes in developing, publishing, and licensing high performance data compression tools for the C/C++ and Visual Basic software development communities. Their products designed to be compatible with a wide array of operating systems and environments.
Submitted Dec 24, 2003
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| Flexible Parsing Algorithm
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Flexible Parsing (FP) is a proposed extension for the common dictionary based compression schemes. This page describes this algorithm and contains links and packages concerning FP.
Submitted Dec 24, 2003
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| Information Content and Compression Limit FAQ
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This FAQ is meant to answer questions regarding the limits of compression and the measure of information content in general terms. Implementation issues and specific compression algorithms are not addressed.
Submitted Dec 24, 2003
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| Jean-loup's home page
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The home page of Jean-loup Gailly. Contains information about gzip, zip, zlib, fractal image compression, comp.compression FAQ.
Submitted Dec 24, 2003
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| LuraTech, Inc.
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LuraTech, Inc. is a technology leader in image and document compression software and related hardware development employed by industry and governmental agencies. LuraTech produces LuraWave - a program that allows users to overcome bandwidth challenges by compressing data files more solidly without compromising image and text quality while dramatically reducing the amount of data required to access, represent and store images.
Submitted Dec 24, 2003
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| MacGzip Home Page
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The MacGzip information and FAQ page, also contains executable files.
Submitted Dec 24, 2003
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| Master Creative Software, Inc
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Master Creative Software Inc. are the developers of add-in data compression libraries for FOXPRO: FOXSQZ - a full featured file archiving and data compression system for FOXPRO, and COMP5 - Data compression library; also offered is JAVASQZ - data compression Class for JAVA. Free demos are available.
Submitted Dec 24, 2003
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| n-ary Huffman Template Algorithm
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n-ary Huffman algorithm uses the {0, 1, ..., n-1} alphabet to encode message. Built tree is n-ary one. Huffman template algorithm enables to use non-numerical weights (costs, frequences).
Submitted Jul 19, 2002
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| PKWARE, Inc.
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PKWARE is dedicated to maintaining and enhancing the .ZIP file format. The site contains zip information and lots of PKZIP programs for various operating systems.
Submitted Dec 24, 2003
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| PocketWare
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Home Page of PocketWare, home of the multi-award winning PocketD Plus and compression tool Crush. This home page allows you to to read about these products, reviews of them, download them for evaluation and finally to register them on-line.
Submitted Dec 24, 2003
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| Practical Huffman Coding
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This page focuses on the practical issues one needs to know for writing a fast and reasonable memory efficient huffman coder. It does not cover the essentials, the history, proof of optimality (within the constrains) and other things you can find in textbooks. This is basically a cookbook recipe collection which fits most people's needs.
Submitted Dec 24, 2003
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| PSZ format
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A brief FAQ on Compressed Postscript Documents - PSZs.
Submitted Dec 24, 2003
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| Real-Time Lossless Compression Systems
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This page describes Real-Time Lossless Compression Systems using slide presentations. It also has a list of papers and links concerning lossless compression.
Submitted Dec 24, 2003
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| SMP mgzip
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mgzip is a program that makes use of SMP machines and zlib to use as many processors as you have to quickly compress files into gzip compatible format. mgzip only compresses; gunzip must be used to uncompress the resultant file. This page contains information, source code and more.
Submitted Dec 24, 2003
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| szip homepage
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Szip is a freeware portable general purpose lossless compression program. It has a high speed and compression, but high memory demands (up to 20MB) too. This page contains information on szip and executable files for various OSes.
Submitted Dec 24, 2003
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| The Art of lossless image compression
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Here are the results of 10 tests performed to compare lossless compression of True Color (24-bit) images by PKZIP 2.04g, BOA 0.58b, BMF 0.21, by some archivers with _special_ algorithms for 24-bit images, and results on same images of the famous PNG algorithm and format created by Display 1.89a, CompuShow 2000! 2.04a, and Image Alchemy 1.10.
Submitted Dec 24, 2003
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| The bzip2 and libbzip2 home page
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bzip2 is a freely available, patent free (see below), high-quality data compressor. It typically compresses files to within 10% to 15% of the best available techniques, whilst being around twice as fast at compression and six times faster at decompression. The page contains executables for various machines, along with documentation and source code.
Submitted Dec 24, 2003
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| The Squeeze Page
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This page is designed to teach people about lossless compression algorithms through the use of text graphics and Java Applets. This is more of a practical guide, so you will understand how the algorithms work, without getting into all the theoretical details.
Submitted Dec 24, 2003
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| TSS - Telvox Software Shop
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Telvox Teleinformatica is an independent research, consulting and engineering company in Italy. The company specializes in the development of open security techniques (multiplatform data compression and symmetric & asymmetric data encryption).
Submitted Dec 24, 2003
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| WaveStat - Mabuse.de
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WaveStat is a software running under X-Windows. It performs clustering image data that can be very useful in image compression.
Submitted Dec 24, 2003
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| Xceed Zip Compression Library
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The Xceed Zip Compression Library is a software component that provides developers with a host of useful functions for compressing and uncompressing files and data. It's most popular functionality is the ability to create, read and write industry-standard Zip files.
Submitted Oct 01, 2001
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