JPEG200 In Accelerator Chip
Analog Devices has announced an acceleratory chip that supports the JPEG2000 image compression format. The chip is targeted towards digital still cameras, and is available now for $14 in quantitites.
http://www.eet.com/story/OEG20010511S0029
Xtractor Plus
Home of Xtractor Plus, handy multiple archive extraction utility for Zip, Rar, Ace, and Arj type archives.
http://www.harmonyhollow.net/xplus.shtml
OpenLPC Codec
A low bitrate codec, described as being derived from the work of Ron Frederick. Freeware.
ftp://ftp.futuredynamics.com/OpenLPC/
HawkVoice Speech Samples
Some speech samples that have been encoded at various rates using various codecs. If you’ve never heard speech encoded at 1.4 Kbps, here’s a chance to check it out.
http://www.hawksoft.com/hawkvoice/codecs.shtml
http://www.faqs.org/rfcs/rfc2190.html
RFC 2190 describes the Internet standard for encapsulating H.263 in an RTP packet stream.
http://www.faqs.org/rfcs/rfc2190.html
David A. Scott’s Fully Bijective Arithmetic Coder
The term bijective as used by Scott means that for any given given file X you are guarantted that A( B( X ) ) == B( A( X ) ) == X, where A and B are a pair of bijectively matched programs. In this particular case, A and B are a compressor and decompressor that use arithmetic coding. Includes C++ source.
http://bijective.dogma.net/compres10.htm
SAWZip - zip file manipulation control
Another nice piece of source code from the Code Project. This is an ATL-based control for reading, writing, and manipulating Zip files.
http://www.codeproject.com/atl/sawzip.asp
The $5000 Compression Challenge
Patrick Craig has an interesting tale to tell. Without being a data compression expert, he managed to beat the $5000 compression challenge. You won’t see him taking an ocean cruise with his winnings, though. DCL reader commented: The challenge was obviously met.
http://www.geocities.com/patchnpuki/other/compression.htm
SBC Archiver
The submitter said: SBC is Burrows Wheeler Transform based file archiver. It’s one of the fastest BWT implementations with high compression ratio. SBC also introduces a high security options with a number of strong encryption algorithms.
SBC appears to be shareware. Comment from a DCL user: Cool archiver; the author has made great effors to make it really fast and also added a lot of heuristics to behave well on multimedia data.
http://www.geocities.com/sbcarchiver/
Kakadu
The home page describes Kakadu thus: A comprehensive, heavily optimized, fully compliant software toolkit for JPEG2000 developers
.
DataCompression.info user Tim A. gushed: A very fast implementation with a small memory footprint compared to Jasper and even other commercial implementations. Also handles large files better than all others I have tried. Very well done with motion JPEG2000, a viewer and a JPIP server to boot (and those are just the sample applications!). John J. added The best of any JPEG2000 compressors for lossless compression. Higher compression rates, and faster compression than Aware and Algo Vison Luratech.
http://www.kakadusoftware.com/
Lzip
Lossy data compression which can reduce input files to 0% of their size. Hint: product was released April 1, 2000.
DCL reader Tim A. marvels: Wow! it’s even faster than tarring to /dev/null!
Eri32 High Performance Freeware Multimedia Archiver
This web page shows a set of images that the author uses to demonstrate the performance of the Eri compressor. The claim is that Eri32 does better on these 24 bit color images than any other lossless compressor.
http://geocities.com/eri32/kodak.html
Compression of Multimedia Information
by A.Ratushnyak. A short discussion related to the compression of audio and pictures. A Russian version of the paper can be found at
http://geocities.com/eri32/mmi.txt.
A Library readher had this to say: Worth reading 2 or 3 times.
http://geocities.com/eri32/mmd.htm
Hawk Software HawkVoice
HawkVoice is a game oriented, multiplayer voice over network API released under the GNU Library General Public License (LGPL), with
support for Linux/Unix and Windows 9x/ME/NT/2000. It is designed to be a portable, open source code alternative to DirectPlay(R) Voice in DX8.
http://www.hawksoft.com/hawkvoice/
Lab squeezes HDTV into standard TV channel
EE Times reports on a development which would allow HDTV and NTSC to coexist on the same frequencies. It’s a hack, and it takes a lot of compression, but it keeps existing set owners online after cutover.
http://www.eet.com/story/OEG20010305S0104
StreamingMediaLand.com
Portal site labels itself as a place with Resources for Engineers, Researchers, and Marketing People in the Streaming Media Field. The Knowledge Base has a good selection of links to standards, tutorials, code, etc. of interest to compression aficionados.
http://streamingmedialand.com/
Mathtools.net Compression Page
Mathtools.net describes itself as the technical computing portal for all your scientific and computing needs. Perhaps a bit ambitious! Here’s their page with C++ compression links.
http://www.mathtools.net/C++/Compression/index.html
Mathtools.net DSP/Applications/Compression Page
Mathtools.net describes itself as the technical computing portal for all your scientific and computing needs. Perhaps a bit ambitious! Here’s their page links to compression applications.
http://www.mathtools.net/C++/DSP/Application_and_Industry/Data_Compression/index.html
JPEG arithmetic encoding and decoding portable software implementation
A back-end implemenation of arithmetic coding for JPEG as defined in the standard. It is distributed as an add-on that can be used with the Independent JPEG groups library. The work of Guido Vollbeding.
Claude Who?
Robert X. Cringely waxes on a bit about the death of Claude Shannon. Bob definitely gives the Father his props.
http://www.pbs.org/cringely/pulpit/pulpit20010301.html
FLAC Source Code
Source code to the FLAC library, command-line encoder/decoder, and player plugins. FLAC is an open-source lossless audio codec.
http://sourceforge.net/cvs/?group_id=13478
Self-Extracting File Framework
By Rui Godinho Lopes. An article about creating Self-Extracting files with integrated compression.
http://www.codeproject.com/file/sfxframework.asp
ZipTV
The ZipTV compression suite is a set of components to be used with Borland’s Delphi and C++ Builder products. Manage archives, SFXs, etc, with support for at least 15 archive formats.
Reader Joseph K. says Amazing collection of compression tools!.
TI releases DSP Developer Support for JPEG2000
Texas Instruments announced the release of a DSP based Image Developer’s Kit, with support coming for JPEG2000, MPEG-4, and other standards.
http://www.ti.com/sc/docs/news/2001/01013.htm
Factoring Wavelet Transforms into Lifting Steps
Overview of Used IDs for crunched files
An attempt to catalog archive types based on the first few bytes of a file. This list was created for Amiga users, but might help on other platforms as well.
http://www.amiga-stuff.com/crunchers-id.html
Archivers to download
A big list of pointers to archive programs for the Amiga platform.
http://www.amiga-stuff.com/archivers-download.html
“Data Compression Fundamentals” (1998)
Andrey Fomin has posted a long Russian paper in word format on his web site. You’ll need a Microsoft Passport (free) to get here, but it’s worth the trip if you can read it.
Andrey has this to say about his paper/book:
A survey of different basic Data Compression techniques. Uses some mathematical and statistical materials, but doesn’t require a
special scientific degree. Though written in Russian, this book contains VERY useful References, Examples and Source Codes!
http://www.msnusers.com/FAndy/files/dc.HTM
Bilddatenkompression/Image Data Compression
Subtitled Basics, Standards and Wavelet-Based Algorithms for Image and Video Coding. This German-language textbook contains full source code (ANSI-C) of a wavelet-based image coder.
http://www-nt.e-technik.uni-rostock.de/~ts/Buch/book.html