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  • Bijective BWT (2 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 (107 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

    So many of today’s files are already compressed (using old, outdated algorithms) that newer algorithms don’t even get a chance to touch them.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

UPX, the Ultimate Packer for eXecutables, version 2.02 released

Posted by Sachin Garg on 14th August 2006 | Permanent Link

Latest version of UPX, the versatile executable packer with nice compression ratios and fast decompression was released a few days ago.

The major new features in version 2 are:

* new format: added support for arm/pe (ARM executables running on WinCE)
* new format: added support for linux elf/amd64
* new format: added support for linux elf/ppc32
* new format: added support for mach/ppc32 (Apple Mac OS X)
* new format: added support for bootable Linux kernels (”vmlinuz/386″)
* new format: added support for Playstation exes (”ps1/exe”)
* slightly better compression using the new NRV2E algorithm
* new options for compression tuning (e.g. ‘–brute’)
* improved win32/pe compatibility
* direct ELF-to-memory decompression
* various bug fixes

Changes in 2.02:
* linux/ppc32, mach/ppc32: compressed programs now work on a 405 CPU
* vmlinuz/386: fixed zlib uncompression problem on dos

One of the nice features which caught my eye was “Your executables suffer no memory overhead or other drawbacks because of in-place decompression”. This sure is cool (btw, I am sure they meant ‘low’ overhead there :-).

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This entry was posted on Monday, August 14th, 2006 at 5:05 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.