Archives
File Compression: New Tool for Life Detection?
Researchers looking for signs of life have decided that complexity might be a good indicator. What better to measure complexity than gzip?
http://www.astrobio.net/news/article415.htmlread more from " File Compression: New Tool for Life Detection? "
JPEG 2000 Part 4 Conformance Test Files
Part 4 of the standard relates to conformance. The files on this site are used in conformance testing. This web site implies that this part of the standard will soon be available for free, but as of March, 2003, this is not the case.
http://www.crc.ricoh.com/~gormish/jpeg2000conformance/JPEG 2000 - Links to Information
The JPEG 2000 committee uses this as the main source of links to the JPEG 2000-related pages on their site. It also includes a friendly plug for a book by committee members, with a “Buy Me” link to Amazon.com.
http://www.jpeg.org/JPEG2000.htmlzlib and libpng for Windows CE
Kazuo Adachi ported both of these important packages to Windows CE and Windows CE .Net. This includes binaries for what I believe are all the currently support CPUs.
http://www.tenik.co.jp/~adachi/wince/XViD Quantizer Parser (XvidQP)
XVidQP is a tool that is designed to tell you something about the quality of an MPEG-4 stream. It does this by giving you a batch of reports, including:
Quantization values of I-Frames and P-Frames
Average quantizer value of I-Frames and P-Frames
Graphical histogram distribution of global clip quantizers
Minimum and maximum frame sizes of all frames
It looks right […]
http://xvidqp.sourceforge.net/Guide to Capturing, Cleaning, and Compressing Video
Matt Woodward has written an article for Ars Technica that gives a good rundown on capturing and compressing video. There’s a great deal of detail here, which you should be able to use to walk through the process, even if you are a rank beginner.
http://arstechnica.com/guide/audio-visual/videocapturing/vidcap-1.htmlread more from " Guide to Capturing, Cleaning, and Compressing Video "
MrSID - searchStorage Definition
A definition from searchStorage.com. MrSID is an image compression format used primarily in mapping/GIS applications.
http://searchstorage.techtarget.com/sDefinition/0,,sid5_gci832738,00.htmlOGG-S
OGG-S is an open source project that aims to create a Digital Rights interface for all media files, but particularly for Ogg Vorbis.
This project is shippnig Beta 1 in March, 2003.
http://www.sidespace.com/products/oggs/David Taubman
David Taubman is on the faculty of the University of New South Wales, in Sydney, Australia. Taubman is the author of the book JPEG2000: Image Compression Fundamentals, Standards and Practice and has been very influential in the current development of the standard. He is also the author of Kakadu, a commercial library that is advertised […]
http://www.ee.unsw.edu.au/staff/taubman/profile.htmMigrator 2000
This group says that they will develop, demonstrate and disseminate tools for the JPEG 2000 digital imaging standard. At this time that seems to include a couple of demonstration programs, some text and web pages, test images, and a link to a Perl package.
http://public.migrator2000.org/main.xalterCWinamp - more than just a Winamp2 API wrapper
A wrapper class that allows you control the Winamp MP3 player from your Visual C++ app.
http://www.codeproject.com/audio/winamp2api.aspread more from " CWinamp - more than just a Winamp2 API wrapper "
Controlling Winamp2/3/Sonique Programmatically
A description of how to control WinAmp from an external program. As a bonus, the techniques work for Sonique 1.x as well. Daniel Bright seems to have come up with this totally via reverse engineering.
http://www.codeproject.com/useritems/Winamp3Ctrl.aspread more from " Controlling Winamp2/3/Sonique Programmatically "
PipeBoost
PipeBoost offers HTTP Compression software that comes with a big list of customers and testimonials. You can download a 30 day trial copy, so you have nothing to lose!
http://www.pipeboost.comperformance: HTTP Compression
An article on the Mozilla web site that talks about improving perceived performance via HTTP compression. This article looks at implementation on the Apache server.
http://www.mozilla.org/projects/apache/gzip/Chaotic Compression?
Kevin Short at the University of New Hampshire has created a company called Chaoticom that is raising money to develop his new idea called Chaotic Compression Technology. Until we see some papers, algorithms, or products this is going to have to be categorized as an Incredible Claim.
http://www.ceps.unh.edu/focus/focus701.pdfBrowseBlast Web Accelerator
The press release says: Ikano and SlipStream launched the BrowseBlast Internet service for U.S. consumers. SlipStream’s Web Accelerator is supposed to increase connection speed significantly for dial-up and wireless connections. The software compresses Web content once it leaves the server, increasing browsing speeds to five times the traditional dial-up or wireless speed.
http://www.browseblast.com/DropMP3
The author of this program, Philippe Laval, says You are looking for an application to encode your sound files in MP3, DropMP3 is done for you.. The program runs on MacOS, uses the LAME encoder, and is released under the GPL. Note that the web page is more or less duplicated in English and French.
Version […]
http://philippe.laval.free.fr/DropMP3/US/DropMP3_US.htmlExpand Networks
Expand makes a series of Network Accelerators. These are black boxes that perform lossless compression on packets being shipped across our WAN. Lots of competition in this area, so companies like Expand depend on innovative and proprietary techniques to give them an edge.
http://www.expand.com/AC3Filter
A DirectShow filter which will allow you to play AVI files containing AC3 encoded audio. A nice stream of releases with steady improvement.
Version 0.66b is shipping as of March, 2003.
http://ac3filter.sourceforge.net/What’s New In Math - October, 2002 - Compression Codes and Technologies
The American Mathematical Society runs a monthly column called ‘What’s New In Math,” featuring topics of general interest to their readers. In October 2002, the topic was data compression, which led to a fairly lengthy column with many, many references. Good reading!
http://www.ams.org/new-in-math/cover/compression1.htmlread more from " What’s New In Math - October, 2002 - Compression Codes and Technologies "
Michael Walden’s Compression Pointers
A comprehensive set of compression pointers. Unfortunately, Michael is using some sort of software that makes bookmarking into his index impossible. So instead, you must link to the main page, shown here, and locate the links to “Data Compression”. Under that he has links to General Resources, Software, and Theory.
http://www.users.voicenet.com/~mwalden/Improvements to the Burrows-Wheeler Compression Algorithm: After BWT Stages
This preprint of Jürgen Abel gives a short introduction into the BWCA field and proposes several improvements for the WFC stage and the IF stage.
It further introduces a new RLE scheme for bypassing the run length
information around the WFC stage. The paper is the basis of the
BWCA program ABC and the revealed approach achieves a
compression […]
read more from " Improvements to the Burrows-Wheeler Compression Algorithm: After BWT Stages "
Bob Crispen’s Port of Zlib to lcc
Win-GZ is built for the Win32 environment using Jacob Navia’s lcc-Win32. The zip file referenced here contains the modifications needed to get zlib to build under this environment.
http://www.crispen.org/src/zlib_lcc.zipJPEG to MJPEG-AVI converter
This Open Source Linux project does one thing and one thing only: it converts a series of JPEG files to an AVI MJPEG file. On the SourceForge tracking system this project is labeled as being Beta, but it is up to release 1.2, so I’m guessing this is no longer the case.
Version 1.2 is shipping […]
David Weekly’s MP3 Stream Code Snippet
David posted this C code with the following comment: I have no idea if this is useful to folks, but since I had to beat my head against the silly Microsoft APIs for quite some time to get a useable result, I thought it might be helpful to post this little snippet showing you how […]
http://david.weekly.org/code/mp3acm.htmlRoger Walker’s DOS Port of mpg123
This mp3 player uses the DJGPP C compiler to port the MPG123 player to MS-DOS. Binaries and source available. Version 3.0 appears to have been worked on in 2002, but no history file seems to be available.
http://www.fareham.org/mpg123/index.shtmlWin-GZ
Bob Crispen has created a GUI wrapper for Gzip so that Win32 users can take advantage of this fine piece of free software. Naturally, Win-GZ is free as well.
Version 1.2 shipped in March of 2003.
http://www.crispen.org/src/#wingzMINC Lossless Digital Data Compression System
Back in 1998 I heard from a poor soul who was being encouraged to put some money into the Premier America, makers of the MINC Compression System. Seeing that MINC promised an iterative compression system that guaranteed any ratio you cared to dial in, I encouraged him to run, not walk, away from this opportunity. […]
http://members.attcanada.ca/~zoltan/cookdocs/16.htmlread more from " MINC Lossless Digital Data Compression System "
Context Tree Weighting
Context Tree Weighting (CTW) has been a technique with great promise, but it hasn’t ever been able to reach the critical mass needed to become more than a curiousity. Jürgen Abel is doing his best to overcome that problem. He’s created a nice reference page for CTW on his data-compression.info web site. He has references […]
http://www.data-compression.info/Algorithms/CTW/Introduction to Wavelets for Image Compression
Aleks Jakulin has created a tutorial that will walk you through the necessary steps to compress images using a wavelet transform. The steps in the process are illustrated using Mathematica code. This page goes beyond a basic tutorial in that it shows a proposal to improve image rendering by adding noise.
http://ai.fri.uni-lj.si/aleks/Wavelets/read more from " Introduction to Wavelets for Image Compression "
