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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 (113 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    So many of today’s files are already compressed (using old, outdated algorithms) that newer algorithms don’t even get a chance to touch them.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.

Quantized Indexing Source Code Available

Posted by Sachin Garg on 28th December 2005 | Permanent Link

We first talked about Quantized Indexing about a month ago. It is coding based on enumerative combinatorics (walks on Pascal triangle, counting of integer lattice paths). The promise held by this algorithm is that of being much faster and having better compression efficiency too.

Back then, it created a lot of noise at comp.compression and the discussions couldn’t reach any conclusion, everyone just decided to wait for its working implementation to be released so that all the claims about its speed and effectiveness can be verified.

Well, a few days ago, Ratko V. Tomic, Chief scientist & CTO of 1stWorks Corp which holds patent for Quantized Indexing, announced availability of source code for Quantized Indexing.

The thread also includes sample source code to illustration how simple enumerative coding is. But take care, its has a patent pending.

One Response to “Quantized Indexing Source Code Available”

  1. Quantized Indexing Update Says:
    January 10th, 2006 at 1:48 pm

    [...] 20;NightLight” to present code which can prove his claims. The inventor had already published code for Quantized Indexing, but it is somehow not convincing enough for others at comp.compression, [...]

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This entry was posted on Wednesday, December 28th, 2005 at 11:09 am 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.