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Jeff Gilchrist

admin
Posted in June 25th, 2001
Published in People, Benchmarks

This is Jeff Gilchrist’s home page. Jeff is the curator of the Archive Compression Test, which presumably keeps him busy.

http://gilchrist.ca/jeff

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Java Image Coding

admin
Posted in June 25th, 2001
Published in Non-Commercial Libraries, Image Compression

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

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A Second Modified Run Length Encoding Scheme for Blocksort Transformed Data

admin
Posted in June 21st, 2001
Published in Papers/Documentation, Burrows-Wheeler Transform/Block Sorting, Run Length Encoding/RLE

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

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Inhalt

admin
Posted in June 20th, 2001
Published in Papers/Documentation, German / Deutsch, Video

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

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Test Harness for the PPMD Compressor

admin
Posted in June 18th, 2001
Published in Source Code, PPM

Here’s a nice little frameword for testing PPMD, or for that matter, any other compressor.

http://www.codeproject.com/cpp/ppmd.asp

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Coding Technologies

admin
Posted in June 15th, 2001
Published in Companies/Organizations, MP3/MPEG Audio, Audio

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.

http://www.codingtechnologies.com/

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Zarak Systems PSQM Testing

admin
Posted in June 11th, 2001
Published in Results, Companies/Organizations, Speech

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.

http://www.psqm.com/

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The Art Of Lossless Data Compression

admin
Posted in June 10th, 2001
Published in Results, Links, Lossless Compression, Image Compression, Benchmarks

A comprehensive set of tests on lossless data compression.

http://geocities.com/eri32/

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MP3 Patent

admin
Posted in June 10th, 2001
Published in Patents/Licenses, MP3/MPEG Audio

This is reportedly the Fraunhofer patent covering the MP3 compression algorithm.

http://www.mp3-tech.org/docs/5579430.pdf

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Intel’s PII Inverse DCT Application Notes

admin
Posted in June 7th, 2001
Published in Non-Commercial Libraries, Source Code, JPEG

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 […]

http://cedar.intel.com/cgi-bin/ids.dll/content/content.jsp?cntKey=Legacy::irtp_886_11228&cntType=IDS_EDITORIAL

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