Author Page
Zipper
Free zip program - zip and unzip utility for windows by Ken Ward. This free program can be downloaded and freely used and distributed.
http://www.trans4mind.com/personal_development/zipper/index.html
How File Compression Works
An article pitched to the layman on how compression works.
All About ZIP Files
Your basic tutorial about dealing with zip files. Targeted at the beginner.
Spirit Corp
Spirit has a wide variety of speech codecs for sale, including standard G.711, G.729 and so on, all the way down to proprietary 1200 bps coders.
ZipALot
With ZipALot you can extract (unace, unrar and unzip) multiple files at once! ZipALot takes all the archives from one directory and extracts them to another one. ZipALot can currently handle ZIP, RAR and ACE (V.2) archives.
Google’s Data Compression Software Directory
I think Google’s directory comes from the DMOZ directory, but I could be wrong. This page mostly has pointers to companies that sell software.
http://directory.google.com/Top/Computers/Software/Data_Compression/
Google’s Data Compression Algorithm Directory
A selection of pointers to web sites that have something to do with data compression algorithms.
http://directory.google.com/Top/Computers/Algorithms/Compression/
TurboZip
TurboZIP is an Archive, E-Mail Manager and Auto Backup tool. It opens major archive and E-mail formats. It offers the unique capabilities to internally view, print, copy, launch, and virus
scan files within ZIP and E-mails without unzipping; unique ZIP Set and Multi-threading operation for simultaneous zipping, unzipping, auto backups..
TurboZip 5.1 appears to have been released […]
TurboZip Express
TurboZIP Express is tightly integrated with Windows Explorer so you can ZIP, UnZIP, CAB, UnCAB, plus E-mail files, all in one quick action. You can compress files to units of any size and
output to HD or FD. It lets you internally view, print or even edit files within Zip..
Scala Technology
From the submitter: This site presents a new audio coder design that achieves efficient compression with fine-grain bitrate scalability. Issues regarding scalability are discussed, and a new approach to measuring coding efficiency is presented. A windows command-line demonstration coder is availiable to download. At present the coder achieves subjective transparency at approximately 96 kbit/s/chan, similar […]
Ultimate Recursive Lossless Compression Research
The name says it all. A research project dedicated to recursive compression.
Build your own one-on-one compressor
The author gives a description of a proposed bijective compression scheme.
Video compression for direct broadcast satellite (DBS) and broadcasting
HEI seems to be a company that consults with broadcasters. They have this page which gives a little tutorial that talks about forward error correction and other things of interest to broadcasters.
RFC 2422 - G.726 - 32 Kbps ADPCM codec
This RFC defines the 32 Kbps toll quality MIME type. The true specification for G.726 is owned by the ITU, and will not be generally available on the net. So knowing how it is encoded only somewhat useful.
Speech Codecs
An ftp site with various speech codecs, including G.722, GSM, G.711, G.723, G.721, CELP, and LPC. Licensing and ownership of the C source varies.
LEADTOOLS JPEG2000 Plugin
LEADTOOLS is now supporting JPEG2000 in their toolkits by means of this JPEG2000 plugin. Supports both file and stream formats, plus many additional features. Download of sample available.
Data Compression Newsletter #13
This issue of the Data Compression Newsletter from Dr. Dobb’s Journal looks at an idea for compression that doesn’t quite pan out.
http://www.ddj.com/maillists/compression/0012cm/0012cm001.htm
Data Compression Newsletter #12 - Using Intel’s JPEG Library
This issue of the Data Compression Newsletter from Dr. Dobb’s has some sample code showing how one might use Intel’s JPEG library to display JPEG files under Win32.
http://www.ddj.com/maillists/compression/0011cm/0011cm001.htm
The Data Compression Newsletter #8
This issue of the Data Compression Newsletter from DDJ highlights a few of the better Incredible Claims to come along - including the biggest of all, the Pixelon fraud case.
http://www.ddj.com/maillists/compression/do200007cm/do200007cm001.htm
Data Compression Newsletter #6 - Goodbye, Phil Katz
This issue of the Data Compression Newsletter from Dr. Dobb’s Journal says farewell to Phil Katz, creator of PKZip.
http://www.ddj.com/maillists/compression/do200005cm/do200005cm001.htm
Aware Inc. JPEG2000 Codec
Aware makes a JPEG 2000 Codec and SDK, which includes libraries for both Win32 and UNIX. You can download a demo of their product from the web site should you be willing to provide a bit of contact data.
The Bath Wavelet Warehouse
The wavelet warehouse has a large repository of wavelet filters. These are coefficient files only, suitable for use with MATLAB or other software. The page also has links to a couple of PDF-format papers, plus references to a few more not available online.
Image Compression Algorithms
The book that accompanies the course of the same name. Russian-language submitter reports that the book has info on RLE, LZW, CCITT Group 3, Jpeg, Wavelet, and Fractal compression.
http://graphics.cs.msu.su/library/our_publications/fractal/index.htm
Jeff Gilchrist
This is Jeff Gilchrist’s home page. Jeff is the curator of the Archive Compression Test, which presumably keeps him busy.
Java Image Coding
Java libraries to read various image formats, including many which are compressed. Hence its appearance here.
http://www.geocities.com/marcoschmidt.geo/java-image-coding.html
A Second Modified Run Length Encoding Scheme for Blocksort Transformed Data
Another paper by Michael Maniscalo discussing a scheme for Run Length Encoding of data that’s been put through the blocksort transform. His first paper uses fixed length codes, this uses variable lenghts.
http://www.geocities.com/m99datacompression/papers/rle2.html
Inhalt
This page gives short descriptions of MPEG and H.261 in German. Different systems of coding color information are described as well. Brief, but useful if you don’t want to get bogged down in details.
http://www.lpr.ei.tum.de/courses/seminar/realzeit_bv/mpeg/node1.html
Test Harness for the PPMD Compressor
Here’s a nice little frameword for testing PPMD, or for that matter, any other compressor.
