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  • Bijective BWT (7 Comments)

    David Scott has written a bijective BWT transform, which brings all the advantages of bijectiveness to BWT based compressors. Among other things, making BWT more suitable for compression-before-encryption and also give (slightly) better compression.

  • Asymmetric Binary System (116 Comments)

    Jarek Duda’s “Asymmetric Binary System” promises to be an alternate to arithmetic coding, having all the advantages, but being much simpler. Matt has coded a PAQ based compressor using ABS for back-end encoding. Update: Andrew Polar has written an alternate implementation of ABS.

  • Precomp: More Compression for your Compressed Files (3 Comments)

    So many of today’s files are already compressed (using old, outdated algorithms) that newer algorithms don’t even get a chance to touch them. Christian Schneider’s Precomp comes to rescue by undoing the harm.

  • On2 Technologies is Hiring

    There aren’t too many companies working on cutting edge codecs, and of those few this one is hiring. Best of luck.

  • China’s AVS Specifications Available (2 Comments)

    Its old news that China has developed their own Advanced Video Standard to avoid high licensing fees. English translation of the standard is now available, along with the IPR policy. Finally something technical that you can get your hands on to feed your appetite.

Combinatorial Coding Papers (online)

Posted by Sachin Garg on 24th June 2005 | Permanent Link

A comp.compression post by nightlight discusses a page which links to about 70 online papers & books on the topics of enumerative (combinatorial) coding, arithmetic coding, universal codes…

There are here some hard to find papers, Ph.D. theses (#23,#36,#42), books (#3 Abramson 1963 classic on Inf. Theory and coding, #37, #38 combinatorics textbook).

Among the online papers: #27 from Rissanen (who invented arithmetic coding in 1976) on math of arithmetic coding (dual radix representation). Also interesting and hard to find #28,#33, #11 (Schalkwijk on lattice walks on Pascal triangle for enum. coding), #61-#62 on potentially fast combinatorial codes, #60 fast unranking … etc.

Truly a gem.

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This entry was posted on Friday, June 24th, 2005 at 9:04 pm by Sachin Garg. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.