data compression link collection


Resources in the Portuguese language. No distinction made between Brazil and Portugal.


Yet another Windows archiving program. PowerArchiver comes with a nice long list of supported formats: ZIP, CAB, LHA (LZH), TAR, TAR.GZ, TAR.BZ2, BH, RAR, ARJ, ARC, ACE, ZOO, GZ, BZIP2, XXE, and UUE. Plus a built-in viewer for JPG, GIF, and a few other formats.

Release 9.0 of PowerArchiver shipped July, 2004.

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Posted in July 16th, 2004


A free self-extractor bundler, it can take a standard Zip file and convert it into a self-extracting EXE, or take a self-extracting EXE and turn it into a Zip file. Free for non-commercial use, lots of nice new features in the 2.0 release.

Version 2.0 is shipping as of May, 2004.


Posted in May 31st, 2004


The software reviewer at the SlaughterHouse speculated that commercial developers of zip programs ought to just pack it in when they see how good QuickZip is. If you agree or disagree, why not post an evaluation here so we can benefit from your experience? It seems to be free, plus has support for Chinese and several European languages.

Release 3.05 is shipping as of November, 2003.


Posted in November 16th, 2003

Digital Photography from Agfa

A complete short course on digital photography from Agfa. It shows up here because Lesson 6 is on The Right Compression. You get a discussion of various formats, including GIF, JPEG, JPEG2K, and PNG. Best of all, it looks like the entire page is available in English, German, Spanish, and Portuguese.


Posted in March 21st, 2003

EzZip Suitcase

This product bills itself as the “Ultimate Multilingual User Friendly” compression tool. The usual Zip features plus support for six different languages. Fifteen day free trial download.

Reader Donald J. says Excellent zip utility and definitely the easiest I have ever used.

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Posted in February 22nd, 2003

BraZip 4.0

Another archiver that supports the zip format? Yep, that’s what it is.Of course, BraZip does support TAR, RAR, GZ, LHA, and a host of other formats. Cruise around the web site a bit and you’ll find the same information in Portuguese.

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Posted in January 1st, 2002

The DCG Framework

DCG Framework is a object oriented framework for lossless data compression. It is written in C++, and intends to be a didactic framework for data compression teaching. This framework is pointed to by the Secção de Análise de Sinais page.

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Posted in November 26th, 1999

David Pereira Coutinho

Personal page of David Pereira Coutinho, Professor at Instituto Superior de Engenharia de Lisboa. This page contains links to several compression-related abstracts and papers, as well as links to the Data Compression Framework developed with his students. (Indexed here as The DCG Framework.) The majority of the page is available in English and Portuguese.

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Posted in November 26th, 1999

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.

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Posted in November 7th, 1999

PPM R — implementation by Rogerio Brito

Published in Source Code, Portuguese, PPM

This PPM implementation has a complete batch of source code but no external documentation. I believe that all of the code is documented internally in Portugese. Corrections to this theory are welcome.


Posted in January 4th, 1999