Data-Compression.org

data compression link collection

The Burrows-Wheeler block sorting algorithm

Published in Newsgroup Posts, Burrows-Wheeler Transform/Block Sorting

The comp.compression FAQ provides some details.

http://www.faqs.org/faqs/compression-faq/part2/section-9.html

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admin
Posted in November 14th, 1999

PNG Support in VRML Browsers

Published in Papers/Documentation, PNG

Why does this matter? Apparently you can use PNG files for texture maps in VRML browsers. Learn more about the topic here.

http://www.libpng.org/pub/png/pngvrml.html

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admin
Posted in November 14th, 1999

Image compression hardware

Published in Newsgroup Posts, Image Compression

The comp.compression FAQ provides a pointer or two.

http://www.faqs.org/faqs/compression-faq/part3/section-1.html

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admin
Posted in November 14th, 1999

I need source for arithmetic coding

Published in Newsgroup Posts, Arithmetic Coding

The relevant answer to this question from the comp.compression FAQ.

http://www.faqs.org/faqs/compression-faq/part1/section-12.html

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admin
Posted in November 14th, 1999

Zoox is an enhanced version of zoo 2.01

Published in Non-Commercial Programs, Archiving

Zoox is an enhanced version of zoo 2.01 from Andre van Dalen. It will allow you to archive a set of files into a series of zoo archives, each limited to a size that you specify. Thus a large number of files on a hard disk can be stored in compressed form on a series of floppy disks.

ftp://garbo.uwasa.fi/pc/arcers/zoox2exe.exe

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admin
Posted in November 14th, 1999

Lossless Data Compression Toolkit

Published in Source Code, Data Compression, PPM, LZ77/LZSS and derivatives, LZ78/LZW and derivatives

Version 1.1 of the lossless data compression toolkit by Nico deVries. The C sources in this toolkit include an LZW compressor, AR002 archiver, a PPM like compressor using arithmetic compression, Huffman compressor, splay tree program, and LZRW1. Quite a variety.

ftp://garbo.uwasa.fi/pc/programming/lds_11.zip

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admin
Posted in November 14th, 1999

Vector quantization of image subbands: a survey

Published in Papers/Documentation, Quantization

by P.C. Cosman, R.M. Gray, and M. Vetterli, IEEE Transactions on Image Processing, February 1996. They discuss using VQ in combination with subband and wavelet decompositions.

ftp://isl.stanford.edu/pub/gray/reports/subvq.ps

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admin
Posted in November 14th, 1999

Waterloo BragZone test suite

Published in Files, Image Compression, Benchmarks

In the BragZone you will find the following:


  • A suite of test images, the “Waterloo Repertoire”.
  • Rate-Distortion plots for various compression codecs.
  • The data from which the above plots are derived.
  • Sample images at selected compression ratios.

ftp://links.uwaterloo.ca/pub/BragZone

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admin
Posted in November 14th, 1999

Gzip

Published in Non-Commercial Programs, Source Code, Gzip

The source repository for gzip.

ftp://prep.ai.mit.edu/pub/gnu/

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admin
Posted in November 14th, 1999

comp.compression FAQ

Published in Newsgroup Posts, Data Compression, Tutorials, Reference, Presentations

The official source for the comp.compression FAQ.

ftp://rtfm.mit.edu/pub/usenet/comp.compression/

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admin
Posted in November 14th, 1999

Fractal Frequently Asked Questions and Answers

Published in Mirror Site

Mirror of the FAQ

ftp://rtfm.mit.edu/pub/usenet/news.answers/fractal-faq

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admin
Posted in November 14th, 1999

MNG documents

Published in Papers/Documentation, Standards, PNG

This ftp site appears to contain a ton of MNG documentation, specs, etc. This is the official ftp site for the MNG project, the web pages are still being hosted at the www.cdrom.com site.

ftp://swrinde.nde.swri.edu/pub/mng/documents/

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admin
Posted in November 14th, 1999

Published in Mirror Site

FTP directory containin the suite of test images used in the PNG test suite from Willem van Schaik

ftp://swrinde.nde.swri.edu/pub/png/images/suite/

         

admin
Posted in November 14th, 1999

Waterloo Fractal Compression Project

Published in Links, Companies/Organizations, Fractals

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.

http://links.uwaterloo.ca/

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admin
Posted in November 14th, 1999

Waterloo BragZone

Published in Files, Benchmarks

Comparing different image compression programs has always been difficult. As a suite of test images and a place for archiving results, the Waterloo BragZone hopes to overcome these problems. Central to the effort is the Waterloo Repertoire, a suite of 32 test images

http://links.uwaterloo.ca/bragzone.base.html

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admin
Posted in November 14th, 1999

EGI compression schemes

Published in Burrows-Wheeler Transform/Block Sorting, Run Length Encoding/RLE, Huffman Coding, Tutorials, Reference, Presentations

This page discusses the various compression schemes used by EGI, Shannon-Fano, BWT, and RLE. EGI is a player of animation sequences.

http://www.compuphase.com/compress.htm

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admin
Posted in November 14th, 1999

DENOISE

Published in Mirror Site

A huge program that shows up in a Wavelets link page. I’m not using it because it appears to not be related to data compression.

http://pascal.math.yale.edu/pub/wavelets/software/denoise/demo-sparc/

         

admin
Posted in November 14th, 1999

Gordon Cormac’s BWT links

Published in Mirror Site

http://plg.uwaterloo.ca/~gvcormac/cs798d/burrowswheeler.html

         

admin
Posted in November 14th, 1999

Greg Roelofs’ home page.

Published in Mirror Site

http://pobox.com/~newt/

         

admin
Posted in November 14th, 1999

UCSB Signal Compression Lab

Published in Links, Companies/Organizations, Data Compression

Various research areas of some interest in here.

http://scl.ece.ucsb.edu/

         

admin
Posted in November 14th, 1999

A comparison of Internet audio compression formats

Published in Links, Audio, Tutorials, Reference, Presentations

A good comparsion chart showing the relative merits of various audio formats. Includes links to definitions and other support information for each format.

http://sericyb.com.au/sc/audio.html

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admin
Posted in November 14th, 1999

MPEG Audio Public Documents

Published in Links, Audio

A big batch of pointers to various MPEG documents. Includes press releases and docs on MPEG-2, MPEG-4, MPEG-7, and AAC.

http://sound.media.mit.edu/mpeg4/audio/public/

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admin
Posted in November 14th, 1999

Published in Mirror Site

http://sunsite.cnlab-switch.ch/ftp/mirror/infozip/zlib/zlib.html

         

admin
Posted in November 14th, 1999

SHORTEN: Simple lossless and near-lossless waveform compression

Published in Papers/Documentation, Speech

Tony Robinson - Technical report CUED/F-INFENG/TR.156. A report on an audio compression algorithm that relies on compression of the waveform with Huffman compression of the residuals.

http://svr-www.eng.cam.ac.uk/~ajr/tr156/tr156.html

         

admin
Posted in November 14th, 1999

Information and Computation

Published in Papers/Documentation, Information Theory

A journal that publishes papers dealing with randomness, pseudorandomness, and Kolmogorov complexity, among other things. Their home page features an on line listing of every paper published in this journal since 1957, with a search tool.

http://theory.lcs.mit.edu/~iandc/

         

admin
Posted in November 14th, 1999

The Wavelet Seismic Inversion Lab

Published in Papers/Documentation, Wavelets

Lots of discussion of wavelets here at the Colorado School of Mines Center for Wave Phenomona.

http://timna.mines.edu/~zmeng/waveletlab/waveletlab.html

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admin
Posted in November 14th, 1999

Jean-loup Gailly

Published in People, French / Français, Zip, zlib

His home page, with English and French language versions.

http://w3.teaser.fr/~jlgailly/

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admin
Posted in November 14th, 1999

LZW - Webopeidia reference page

Published in Papers/Documentation, LZ78/LZW and derivatives

Short for Lempel-Zif-Welsh, a popular data compression technique developed in 1977 by J. Ziv and A Lempel, and later refined by T. Welsh. It is the compression algorithm used in the GIF graphics file format, which is one of the standard graphic formats used by CompuServe and the World Wide Web.

http://webopedia.internet.com/TERM/L/LZW.html

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admin
Posted in November 14th, 1999

The LZO documentation

Published in Papers/Documentation, LZO

Concise documentation on LZO.

http://www.oberhumer.com/opensource/lzo/lzodoc.php

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admin
Posted in November 14th, 1999

Information Theory, Pattern Recognition and Neural Networks

Published in Links, Papers/Documentation, Information Theory

Some sort of class outline, including lots of links and references.

http://wol.ra.phy.cam.ac.uk/mackay/itprnn/course.html

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admin
Posted in November 14th, 1999
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