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  • Bijective BWT (6 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    So many of today’s files are already compressed (using old, outdated algorithms) that newer algorithms don’t even get a chance to touch them.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.

UPX Version 3.00 Released

Posted by Sachin Garg on 2nd May 2007 | Permanent Link

Version 3.00 of UPX, the Ultimate Packer for eXecutables was released on 27 Apr 2007. The main news in version 3 is optional LZMA compression and support for BSD systems.

Changes since last stable release:

Changes in 3.00 (27 Apr 2007):
* watcom/le & tmt/adam: fixed a problem when using certain filters

Changes in 2.93 beta (08 Mar 2007):
* new formats Mach/i386 and Mach/fat support Mac OS X i686 and Universal binaries [i686 and PowerPC only]
* dos/exe: LZMA is now also supported for 16-bit dos/exe. Please note that you have to explicitly use ‘–lzma’ even for ‘–ultra-brute’ here because runtime decompression is about 30 times slower than NRV - which is really noticeable on old machines.
* dos/exe: fixed a rarely occuring bug in relocation handling
* win32/pe & arm/pe: better icon compression handling

Changes in 2.92 beta (23 Jan 2007):
* new option ‘–ultra-brute’ which tries even more variants
* slightly improved compression ratio for some files when using ‘–brute’ or ‘–ultra-brute’
* bug fixes

Changes in 2.91 beta (29 Nov 2006):
* assorted bug fixes
* arm/pe: fix “missing” icon & version info resource problem for wince 5
* win32/pe & arm/pe: added option –compress-icons=3 to compress all icons

Changes in 2.90 beta (08 Oct 2006):
* LZMA algorithm support for most of the 32-bit and 64-bit file formats; use new option ‘–lzma’ to enable
* new format: BSD/elf386 supporting FreeBSD, NetBSD and OpenBSD via auto-detection of PT_NOTE or EI_OSABI
* arm/pe: all the NRV compression methods are now supported (only NRV2D is missing in thumb mode)
* linux/elf386, linux/ElfAMD: remember /proc/self/exe in environment
* major source code changes: the runtime decompression stubs are now built from internal ELF objects

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This entry was posted on Wednesday, May 2nd, 2007 at 12:21 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.