Archives
The Sort Transformation by Michael Schindler
Michael Schindler’s page describing a sorting algorithm that was presented in a poster session at DCC ‘97. Links to his source code, plus links to the paper and poster in postscript format. Update: Michael has made additional source code available.
http://www.compressconsult.com/st/read more from " The Sort Transformation by Michael Schindler "
Fourelle Systems
Fourelle Systems, Inc.is the global market leader in accelerated content delivery. Venturi, Fourelle’s flagship product platform, speeds the performance of IP applications over WAN links including T1, frame relay, satellite, wireless, cable and dial-up. Venturi uses application level compressionand an optimized transport protocol to achieve up to 400% performance gains.
http://www.fourelle.comMPEG Audio Layer I/II/III frame header
Docs showing the format for the frame header. You can learn here why MP1 and MP2 files can easily be chopped up and edited, while MP3 is not so easy.
Reader Sebastian L. had this to say: It was the first description that I found and was useful. It’s not the complete standard but it’s a […]
http://www.mp3-tech.org/programmer/frame_header.htmlGiovanni Manzini
Giovanni Manzini has published papers covering a few different topics in Data Compression, including several recent works on Burrows-Wheeler algorithms. He is currently an Associate Professor of Computer Science at the Universita degli Studi del Piemonte Orientale in the the most northern reaches of Italy.
http://www.mfn.unipmn.it/~manzini/manzini_uk.htmlWhat is mu-law encoding? Where can I get source for it?
Part of the DSP FAQ, in our case it is an answer to a speech coding question.
http://www.hr/josip/DSP/FAQ/27.htmlread more from " What is mu-law encoding? Where can I get source for it? "
TrueSpeech
The DSP Group makes a codec called TrueSpeech. You can get a copy of the player for free here to check out the 8.5 KBps audio it makes possible.
http://www.dspg.com/dspg/truespeech_compression.htmlLZ77 Daten - Dekompression auf dem 68HC11 Micro Controller
Christian Scheurer wrote up his LZ77 project that was targeted to the 68HC11 processor. It’s written in German, perhaps you could use Babel-fish to translate. Source code included.
http://www.mountpoint.ch/unique/project/t-rip/read more from " LZ77 Daten - Dekompression auf dem 68HC11 Micro Controller "
SpeakFreely
This freeware program is designed to perform Internet telephony. It incorporates source for a couple of interesting speech codec, which is why it gets a link in the library.
http://www.speakfreely.org/Advanced Multimedia Processing Lab
This lab at CMU seems to be doing some interesting things with video compression. At a minimum, they have an H.263 codec you can download.
http://amp.ece.cmu.edu/Computer Vision Test Images
A list of links to test images. Utopia for the benchmark junkie.
http://www.cs.cmu.edu/afs/cs/project/cil/ftp/html/v-images.htmlImage Compression Research
A page devoted to image compression research at the University of Joensuu, which would appear to be in Finland. Links to more research and a PhD thesis.
http://cs.joensuu.fi/pages/franti/comp/Bibliography of Claude Elwood Shannon
This bibliography is the best attempt at a complete record of all the written works of Claude Shannon, father of Information Theory.
http://www.research.att.com/~njas/doc/shannonbib.htmlOpportunistic data structures with applications
Two papers in which it is show how to combine the BWT with the suffix array
data structure, in order to build a sort of compressed suffix array.
In the first paper it is proven that
the space occupancy of the compressed suffix array can be bounded in
terms of the entropy of the input string. In the […]
read more from " Opportunistic data structures with applications "
David’s View of BWT
David Scott occupies a unique niche in the world of data compression. He is very interested in how one can adapt existing compression technologies to be bijective, a term you can find defined on his web page. The stated motivation for this is to increase the difficulty of breaking an encrypted version of the file. […]
http://bijective.dogma.net/compres9.htmColour metric
A good explanation on color perception. This isn’t truly a data compression topic, but it actually plays a very important role in lossy image compression schemes, so I though the library ought to have at least one or two points.
http://www.compuphase.com/cmetric.htmThe Green Tree Of Compression Methods
A Practical Introduction To Data Compression by Alexander Ratushnyak. A Data Compression mini-FAQ with a good set of links.
http://geocities.com/eri32/int.htmA Run Length Encoding Scheme For Block Sort Transformed Data
A paper by Michael A. Maniscalco that desribes an RLE algorithm tailored for use with the BWT compression technique.
http://www.geocities.com/m99datacompression/papers/rle/rle.htmlread more from " A Run Length Encoding Scheme For Block Sort Transformed Data "
FreeExtractor
A free program to create self extracting archives from Zip files. An open source program that harkens back to shareware days by asking for donations, old-school style.
http://www.disoriented.com/FreeExtractor/Shannon Statue
A bronze statue of Claude Shannon will be unveiled on Friday, October 6, 2000 in his hometown, Gaylord, Michigan. This sculpture by Eugene Daub was commissioned by the Information Theory Society of the Institute of Electrical and Electronics Engineers (IEEE). It will be installed in the recently named Shannon Park in downtown Gaylord.
http://www.eecs.umich.edu/shannonstatue/Information Theory - Who Created It?
A small web page with some info about Claude Shannon and what he meant.
http://www.lucent.com/minds/infotheory/who.htmlClaude Elwood Shannon
A short bio, plus some links to more information on Shannon.
http://www-groups.dcs.st-and.ac.uk/%7ehistory/Mathematicians/Shannon.htmlClaude Shannon
A bio on Shannon, plus some links.
http://www.nightgarden.com/infosci.htm#claudeThe significance of Shannon’s Work
A salute to Claude Shannon from Bell Labs.
http://cm.bell-labs.com/cm/ms/what/shannonday/work.htmlJohan Wahlin’s Huffman Tool
A Java program that prints javacode for coding and decoding the characters through a Huffman tree.
http://DataCompression.info/ArchiveFormats/HuffmanTool.txtJPEG Cruncher Pro
JPEG Cruncher is a commercial app that lets you squeeze the heck out of your images while keeping them looking as nice as possible.
http://www.spinwave.com/jc/What is Compression?
An explanation from Colin E. Manning, complete with pictures.
http://www.newmediarepublic.com/dvideo/compression/adv04.htmlProgressive Geometry Compression
by Andrei Khodakovsky, Peter Schröder, Wim Sweldens. Compressing 3-D object representations is a good thing. Even better is allowing progressive display of these objects. The techniques in this paper are to be applied to geometric meshes.
http://cm.bell-labs.com/who/wim/index.htmlText Preprocessing for Burrows-Wheeler Block Sorting Compression
A short paper discussing various preprocessing techniques that can be used in BWT-based compression programs. RTF format.
http://DataCompression.info/ArchiveFormats/BWT_paper.rtfread more from " Text Preprocessing for Burrows-Wheeler Block Sorting Compression "
JJ2000 - An Implementation of the JPEG2000 Standard in Java
JJ2000 is a Java implementation of a JPEG 2000 codec. The web site states that JJ2000 is under consideration to be a reference implemenation of the standard. JJ2000 is now freely available to all, and may be freely used in products that implement JPEG 2000-Part I.
The page also includes links to a white paper, presentations, […]
http://jj2000.epfl.ch/read more from " JJ2000 - An Implementation of the JPEG2000 Standard in Java "
CyberMail
Cybermail is a product that lets you compress video files for email transmission. According to the advert, they have a revolutionary new compression engine!,
http://www.comtrad.com/cfusion/template/makepage.cfm?prod_name=Video_Email&site=85124&branch=unshocked&category=0&product_base_id=322&sourceid=002938462