Data-Compression.org

data compression link collection

MPEG-FAQ Version 4.1

An MPEG FAQ that is either from Frank Gadegast or KeyJ Phade. Worth a look, answers a lot of questions.

http://www.gadegast.de/frank/mpegfaq/index.html

         

Posted in December 28th, 2001

MPEG-4 AAC

This article from EE Times talks about the changes made to the Advanced Audio Coding portion of the standard during the change from MPEG-2 to MPEG-4.

http://www.eet.com/story/OEG20011218S0048

         

Posted in December 27th, 2001

The New Canterbury Corpus

Published in Files, Data Compression

No details, but it appears to be a collection of files designed to represent a slightly wider range of modern applications.

http://www.cosc.canterbury.ac.nz/~tim/corpus/ftp/cantrbry.tar.gz

         

Posted in December 25th, 2001

A Corpus for the Evaluation of Lossless Compression Algorithms

Ross Arnold and Tim Bell, “A Corpus for the Evaluation of Lossless Compression Algorithms”, Proc. IEEE Data Compression Conference, Snowbird, Utah, March 1997.

http://www.cosc.canterbury.ac.nz/~tim/corpus/report.ps.gz

         

Posted in December 25th, 2001

CCITT standard images (Bilevel)

Published in Files, Image Compression

Images commonly used in compression tests are stored here in Sun raster format. At this time I believe that all you will find here are gray scale images.

ftp://nic.funet.fi/pub/graphics/misc/test-images/

         

Posted in December 25th, 2001

Reversible Kompressionsalgorithmen

What appears to be a discussion of Lossless compression algorithms, including Huffman coding, Arithmetic Coding, LZW, LZSS, and LZH.

http://www.ztt.fh-worms.de/de/sem/ws95_96/kompressionsalgorithmen/node3.html#SECTION000300
000000000000000

* *      

Posted in December 24th, 2001

Irreversible Kompressionsalgorithmen

A study of lossy compression algorithms, including discussion of JPEG, MPEG, and the DCT.

http://www.ztt.fh-worms.de/de/sem/ws95_96/kompressionsalgorithmen/node30.html#SECTION00040
0000000000000000

         

Posted in December 24th, 2001

Kompressionsalgorithmen

A big survey paper of data compression techniques by Joachim Schwarz und Guido Sörmann. German language.

http://www.ztt.fh-worms.de/de/sem/ws95_96/kompressionsalgorithmen/Kompressionsalgorithmen.
html

* * * * *

Posted in December 24th, 2001

JPEG 2000, More Than New Millennium Buzz

An article on JPEG 2000 in WebReview. A pretty good description of what’s going to be in the standard.

http://www.webreview.com/1999/08_13/designers/08_13_99_3.shtml

         

Posted in December 24th, 2001

JPEG-LS Software

by David A. Clunie. A preliminary implementation of JPEG-LS.

http://www.dclunie.com/jpegls.html

         

Posted in December 24th, 2001

Data Compression Pointers

A set of data compression links maintained by Haruhiko Okumura. Many of the links here point to Japanese language sites. Even if you cannot read Japanese, you may still profit from the profusion of links on this page. Just be sure your browser is set to render Shift-JIS.

http://www.matsusaka-u.ac.jp/~okumura/compression.html

         

Posted in December 24th, 2001

Data Compression in Japan

I need a translation of this page from any interested volunteer.

http://www.matsusaka-u.ac.jp/~okumura/compression/

         

Posted in December 24th, 2001

Unknown

I need a translation of this page from any Japanese speaking volunteers.

http://www.matsusaka-u.ac.jp/~okumura/compression/cmaga.html

         

Posted in December 24th, 2001

Zlib

A Japanese language site that is somehow related to zlib.

http://www.matsusaka-u.ac.jp/~okumura/compression/zlib.html

* * * *  

Posted in December 24th, 2001

Samuel H. Smith’s original Unzip code

Published in Source Code, Zip

This source code appears to be Samuel Smith’s original Unzip code. This eventually gave birth to the Info-ZIP project and its UnZip program. Sam was the pioneer, and I believe he did most or all of it on his own.

http://pascal.sources.ru/archives/ccunzip.htm

         

Posted in December 24th, 2001

US Patent 4941193: Methods and apparatus for image compression by iterated function system

One of the earliest patents regarding fractal compression. Issued 10 July 1990, assigned to Iterated Systems.

         

Posted in December 24th, 2001

US Patent 5065447: Method and apparatus for processing digital data

A fundamental patent for fractal image compression assigned to Iterated Systems. This patent was issued 12 November 1991.

         

Posted in December 24th, 2001

US Patent 5347600: Method and apparatus for compression and decompression of digital image data

A fractal compression patent held by Iterated Systems, Inc. This appears to be a very fundamental patent issued 13 September 1994.

         

Posted in December 24th, 2001

US5422734: Method for arithmetically encoding half-tone image in image processing system

An arithmetic coding patent which appears to be currently assigned to Samsung.

         

Posted in December 24th, 2001

Roalt’s H.263 Page

Published in Source Code, Video

Roalt created an ANSI C H.263 encoder, posted it here along with a tiny bit of documentation.

http://www.xs4all.nl/~roalt/h263.html

         

Posted in December 24th, 2001

TMR - Wavelets in Numerical Simulation

This page reflects the necessity of developping collaborations (and intensify those that already exist) between the nine research groups from six different european countries, with the ultimate common goal of applying wavelet-based methods to complex industrial problems.

http://www.ian.pv.cnr.it/~wavelet/

         

Posted in December 24th, 2001

A Review of Video Streaming over the Internet

A technical report giving an overview of various video streaming formats used in today’s Internt. Includes low-level details such as transport formats, and high-level info such as providers of application servers.

http://archive.dstc.edu.au/RDU/staff/jane-hunter/video-streaming.html

         

Posted in December 24th, 2001

Microsoft Seeks to Depose MPEG-2

EETimes reports on Microsoft’s Corona encoder - a video encoder that is touted as being superior to MPEG-2. The movie business is in a quandry, faced with the technical demands needed to put HD movies on disk. Using conventional compression, they would need to convert to costly blue-laser driven systems. Microsoft offers them a way to put more data on existing disks with just firmware upgrades.

http://www.eetimes.com/story/OEG20011212S0060

         

Posted in December 19th, 2001

SA-Comp/1 and SA-Comp/4 Data Compression SA

Cisco makes a box you can attach to their routers. The box performs lossless data compression.

http://www.cisco.com/univercd/cc/td/doc/product/core/7202/portadpt/service/sa_comp/

         

Posted in December 18th, 2001

Hi/fn, Inc.

Hi/fn makes lossless compression hardware and software. They have a bunch of chips that implement LZS and MPCC compression, plus a library that does the same thing. I have been led to believe that these algorithms are partially or completely protected by patents.

http://www.hifn.com/products/Compression.html

* * * * *

Posted in December 18th, 2001

SONARC: Digital Audio Compression, Version 2.1i

SONARC is an old DOS audio compression program that was apparently used in Ultima, a well known game.

http://www.firstpr.com.au/audiocomp/lossless/sonarc/

         

Posted in December 17th, 2001

The Context Tree Weighting Method: Basic Properties

One page poster for Frans M.J. Willems, Yuri M. Shtarkov, and Tjalling J. Tjalkens, “The Context Tree Weighting Method: Basic Properties,” IEEE Trans. Inform. Theory, May 1995. (Postscript)

http://citeseer.nj.nec.com/willems95context.html

         

Posted in December 17th, 2001

Context Weighting for General Finite-Context Sources,

by Frans M.J. Willems, Yuri M. Shtarkov, and Tjalling J. Tjalkens, IEEE Trans. Inform. Theory, Sept. 1996. A postscript version of this overview paper.

http://citeseer.nj.nec.com/willems94context.html

         

Posted in December 17th, 2001

Medical Image Format FAQ - Part 7

Lots of pointers here. Relevant to compression because of the wealth of pointers to various formats used in medical imaging, such as JPEG-LS and Lossless JPEG.

http://www.faqs.org/faqs/medical-image-faq/part7/

         

Posted in December 15th, 2001

MELP Vocoder Algorithm

Atlanta Signal Processor, Inc., is nice enough to host his paper on their site. It gives a brief overview of the MELP Vocoder algorithm.

http://www.aspi.com/tech/specs/pdfs/melp.pdf

* * * * *

Posted in December 15th, 2001