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    So many of today’s files are already compressed (using old, outdated algorithms) that newer algorithms don’t even get a chance to touch them.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

pbzip2: Parallel BZIP2 0.9.6 Released

Posted by Sachin Garg on 11th February 2006 | Permanent Link

Jeff Gilchrist’s PBZIP2 is a parallel implementation of the bzip2 block-sorting file compressor that uses pthreads and achieves near-linear speedup on SMP machines. The output of this version is fully compatible with bzip2 1.0.2 (ie: anything compressed with PBZIP2 can be decompressed with bzip2).

This release fixes a major bug that caused some blocks to be missed by the decompression routine under certain conditions.

There was another release in Jan which fixed some major bugs that caused random segfaults and other problems with large files. It now defaults to silent operation like bzip2, and adds support for more win32 compilers like Borland.

4 Responses to “pbzip2: Parallel BZIP2 0.9.6 Released”

  1. 4 Parallel bzip2 Implementations Says:
    February 11th, 2006 at 5:55 am

    [...] A follow up to the recent pbzip2 update, I came across a few more similar solutions. [...]

  2. Jeff Gilchrist Says:
    February 13th, 2006 at 2:48 pm

    You have the release note info correct, but its actually v0.9.6 that was just released. Not sure where you got 0.8.2 from. ;-)

  3. Sachin Garg Says:
    February 14th, 2006 at 12:00 am

    Ouch! Have fixed this.

    I came across this in fm.announce newsgroup. The “thread” subject mentioned 0.8.2, I should have noticed that the “post” was about v0.9.6

  4. sam Says:
    February 24th, 2007 at 4:58 am

    Thanks that deal with this problem.

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This entry was posted on Saturday, February 11th, 2006 at 5:26 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.