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UPL Compression : the complete professional toolkit
The UPL Compression Library is a high-performance professional compression library. It offers the ability to compress and decompress data, buffers, strings or single files and features the latest innovations in data compression. The library offers eight extremely powerful compression algorithms. Dynamic Huffman, Arithmetic, BWT, Ppm and several Lempel Ziv flavors.
DataCompression.info user John G. […]
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Arithmetic Coding Revisited
by Moffat, Neal, and Witten. The authors of the original CACM article on arithmetic coding take a fresh look at the topic with an additional ten years of knowledge.
http://www.cs.technion.ac.il/~ronir/courses/advancedTopics/pubs/moffat.pdfWinimp - The Archiver for the 21st Century
WinImp has been re-released as freeware. This archiver can create Zip files, and extract from the usual list of Zip, ARJ, RAR, and so on. It includes a couple of proprietary (BWT-based?) algorithms that purport to do well on text files.
DataCompression.info user Mike notes that It includes 2 very good
compression methods and only the new […]
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ZipMagic
ZipMagic gives you transparent access to Zip files via the technology from the ZipFolders product. Treat archive files as if they were ordinary folders. ZipMagic of course contains a number of other nice features.
http://www.ontrack.com/zipmagic/The DICOM Standard
This page gives a short introduction to the DICOM standard, commonly used for medical imaging. It has a lengthy set of links to DICOM viewers, images, and other resources.
http://www.psyc.nott.ac.uk/staff/cr1/dicom.htmlIntel Integrated Performance Primitives
Intel has created a new library designed to deal with varous primitives used in Data Compression. Intel says: Intel® Integrated Performance Primitives (IPP) is a software library which provides a range of library functions for multimedia, audio codecs, video codecs (for example H.263, MPEG-4), image processing (JPEG), signal processing, speech compression (i.e. G.723, GSM ARM*) […]
http://developer.intel.com/software/products/ipp/ipp30/overview.htmImagXpress Standard
This imaging library from PegasusImaging supports reading and writing of a wide variety of compressed image formats, including JPEG, GIF, and PNG. JPEG2000 and Lossless JPEG are advertised as available with add-on packages.
http://www.pegasusimaging.com/imagxpressse.htmSoundExpert
This web site aims to provind blind quality testing of sound codecs. The site is just being launched at this time (3/2002), and is currently testing eight codecs.
Update: As of 8/2002, a few new codecs were added to the test suite: Ogg Vorbis 1.0, MPEG-4 Audio for QuickTime, and the PsyTel MPEG-4 AAC codec.
http://www.soundexpert.info/Xpdf
This is an open source PDF renderer, which includes code that decompresses LZW data embedded in the PDF file. It doesn’t actually do the LZW decompression itself - it converts the data to a format that can be handled by UNIX compress.
http://www.foolabs.com/xpdf/The Multivalent Browser
This Java browswer knows how to render PDF files, which means it understands the elusive LZW compressed data format used by Adobe.
http://www.cs.berkeley.edu/~phelps/Multivalent/Java PDF Libraries
A variety of libraries that can be used to read and write PDF format.
http://www.geocities.com/marcoschmidt.geo/java-document-libraries.html#pdfPatent Claim Strikes an Electronics Nerve
The New York Times covers the Forgent JPEG case. A good overview of the case.
http://www.nytimes.com/2002/07/29/technology/29JPEG.htmlread more from " Patent Claim Strikes an Electronics Nerve "
Forgent’s Press Release on JPEG Patent
Forgent explains their position with respect to the infamous ‘672 patent.
http://www.corporate-ir.net/ireye/ir_site.zhtml?ticker=FORG&script=410&layout=-6&item_id=314044Finding patent truth in JPEG claim
An article on CNET regarding the Forgent JPEG patent. This article brings up the allegation that one of the patent authors sat on a JPEG committee.
http://news.com.com/2100-1001-945686.htmlNo more JPEGs - ISO to withdraw image standard
The Register UK reports that the ISO may withdraw the JPEG image format standard if the Forgent ‘672 patent holds up.
http://www.theregister.co.uk/content/archive/26339.htmlread more from " No more JPEGs - ISO to withdraw image standard "
Update: Forgent Claims Rights To JPEG Patent
ExtremeTech reports on the Forgent JPEG patent case.
http://www.extremetech.com/article2/0,3973,389261,00.aspread more from " Update: Forgent Claims Rights To JPEG Patent "
JPEG Patent Claim Sparks Concern
Wired reports on the Forgent JPEG patent case.
http://www.wired.com/news/business/0,1367,53981,00.htmlJPEG group seeks prior art
The ISO committee responsible for the JPEG standard would like to track down prior art that might invalidate the Forgent patent.
http://www.jpeg.org/newsrel1.htmlVorbis.com
One of the home pages of the Ogg Vorbis project, this is a good place to start if you’re looking for downloads, documentation, or Ogg Vorbis software.
http://www.vorbis.com/Morgan M-JPEG2000 codec V1
This is the download page for the Morgan Motion JPEG2000 codec. You can download a free copy of the codec and check it out. Support included for Video For Windows/DirectShow, and some video clips in AVI format are included.
http://www.morgan-multimedia.com/M-JPEG2000/RealNetworks Helix Initiative
RealNetworks has announced that they are going to be Open Sourcing a significant portion of their server products. Outlook from the Open Source community is guardedly optimistic.
http://www.realnetworks.com/solutions/leadership/helix.htmlReal embraces open-source Ogg Vorbis
Real Networks is going to add support for the Ogg Vorbis audio format in their client software, ZDNet reports. This could go a long way towards legitimizing the upstart competitor to MP3.
http://zdnet.com.com/2100-1104-946520.htmlZipSearch
A search program for Win32 computers. ZipSearch knows how to look through Zip files and compressed EXEs to find search strings.
Version 1.07 shipping in December, 2002.
http://www.filehunter.com/ZipsearchDetails.htmDWG2ZIP
This program lets you compress AutoCad DWG files into Zip archives for distribution.
Version 2.0 is shipping as of May, 2003.
http://www.dwg2zip.com/Discussion of Audio Compression
A great discussion of audio compression, which includes the results fo the 64 Kbps listening test.
http://ff123.net/ChilkatZip Self-Extractor
ChilkatZip Self-Extractor is a utility program that creates self-extracting ZIP files for Windows 95/98/Me/NT/2000/XP. They advertise a few interesting features, including 256-bit encryption, streaming technology, and progress indicators.
http://www.chilkatsoft.com/ChilkatSfx.aspTechnical audio papers
A nice set of papers on audio coding. Includes goodies such as the ISO standards on MPEG-2 part 3 audio coding.
http://www.mp3-tech.org/programmer/docs/Ogg Vorbis Documentation
This page contains links to a wide variety of Ogg Vorbis documents, including specifications, programming guides, and technical discussions.
http://www.xiph.org/ogg/vorbis/docs.htmlVcDemo - Image and Video Compression Learning Tool
VcDemo is an interactive image and video compression (freeware) software package for Windows. It is intended as a tool for learning about compression techniques: from basic sampling and PCM to today’s most advanced scalable embedded zerotree wavelet image compression technique and the MPEG video compression standard. VcDemo is an ideal tool for students to explore […]
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