Author Page
Coding Technologies
These guys are responsible for some of the work that took the MP3 standard to its next revision: MP3Pro. They say their current focus is the development and marketing of SBR-enhanced codecs.
Zarak Systems PSQM Testing
Zarak Systems will perform Quality of Service testing using PSQM, the Perceptual Speech Quality Measurement. This web page will tell you a little bit about what that means to you.
The Art Of Lossless Data Compression
A comprehensive set of tests on lossless data compression.
MP3 Patent
This is reportedly the Fraunhofer patent covering the MP3 compression algorithm.
Intel’s PII Inverse DCT Application Notes
Intel has a nice document showing how one can optimize the inverse DCT when running on processors with the MMX instructions, such as the Pentium II. Listings include code you can drop into the Independent JPEG Group’s library. DCL reader Neil H. had this to say: The drop-in replacement for the iDCT of the IJG […]
PackWord
PackWord can compress a Microsoft Word document (.doc) file into a smaller, compressed, .doc file. The compressed .doc file is self-extracting: when loaded into Microsoft Word, the compressed document will automatically expand to the original version.
Luratech
Luratech has plugins and an SDK for both their proprietary format and JPEG2000. Products come in a dizzying array of options, ActiveX controls, C-SDK, Java-SDK, plugins for PhotoShop or browsers. Note that some of their products can now be downloaded as freeward!
Note: What was once LuraTech is now Algo Vision LuraTech.
Reader Tom H. says: Luratech […]
MP3 Upgrade in the Works?
ZDNet reports that MP3 patent holders, Fraunofer Institute and Thomson Multimedia are shopping around a new version of the aging audio standard. Formats such as Microsoft’s Windows Media format have been eating into the MP3 dominance on the net.
http://www.zdnet.com/zdnn/stories/news/0,4586,5083015,00.html?chkpt=zdhpnews01
Stream Machines Selling MPEG-2 Chip
Stream Machines is selling a dedicate chip that will decode MPEG-1, -2, and -3, along with MP3 and other standards. The chip will be roughly $35 in quantity.
Image Power Downloads
Image Power has their products available for download here, which includes the commercial version of PowerCompressor, and a beta copy of Jasper, a JPEG2000 codec.
http://www.imagepower.com/products/default.asp?url=downloads/default.asp
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.
Xtractor Plus
Home of Xtractor Plus, handy multiple archive extraction utility for Zip, Rar, Ace, and Arj type archives.
OpenLPC Codec
A low bitrate codec, described as being derived from the work of Ron Frederick. Freeware.
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.faqs.org/rfcs/rfc2190.html
RFC 2190 describes the Internet standard for encapsulating H.263 in an RTP packet stream.
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 […]
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.
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.
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 […]
Kakadu
The home page describes Kakadu thus: A comprehensive, heavily optimized, fully compliant software toolkit for JPEG2000 developers
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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 […]
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.
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.
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.
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.
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.
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.
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.
