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PPMd is too old...
2009-06-05 17:10:28 UTC in 7-Zip
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As to PPM, BCM usually not only faster but has a higher compression. For example, comparison on a classic "book1" test file:
7-Zip 4.65, Ultra-PPMd -> 211,227 bytes
BCM 0.08 -> 209,826 bytes
;)
2009-06-05 17:10:07 UTC in 7-Zip
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By default, BCM uses about ~300 MB of memory. It is more than two times smaller than with 7-Zips Ultra compression level. Anyway, you may set desired block size, changing the memory usage as well.
2009-06-05 17:07:01 UTC in 7-Zip
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A brief comparison...
DSC_1062.bmp (18,367,770 bytes)
7-Zip 4.65, Ultra -> 11,408,167 bytes
BCM 0.08 -> 8,832,278 bytes
butterfly4.bmp (18,048,054 bytes)
7-Zip 4.65, Ultra -> 6,837,078 bytes
BCM 0.08 -> 4,723,384 bytes
3200.txt (16,013,962 bytes)
7-Zip 4.65, Ultra -> 4,563,571 bytes
BCM 0.08 -> 3,660,195 bytes
world95.txt (2,988,578 bytes)
7-Zip 4.65, Ultra...
2009-06-01 15:31:43 UTC in 7-Zip
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The brand new BCM is one the strongest BWT-based compression engines available!
It have nearly the PAQ-like compression power with the reasonable speed and memory usage! Check it for yourself!
http://encode.ru/forum/showthread.php?t=382
:)
2009-06-01 11:21:31 UTC in 7-Zip
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Check out the brand new BCM - a BWT+CM file compressor that features strong compression with a fast compression and decompression.
http://encode.ru/forum/showthread.php?t=279
It's one of the strongest BWT available:
calgary.tar
BCM -> 784,072 bytes
BLIZ -> 790,491 bytes
BBB -> 798,705 bytes
MCOMP -> 800,402 bytes
Original -> 3,152,896 bytes
book1
BCM ->...
2009-02-11 16:48:13 UTC in 7-Zip
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ilia_muraviev registered the BALZ project.
2008-07-01 20:50:10 UTC in BALZ
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Hi!
Currenrly I'm still working on compression - i.e. better parsing strategy for higher compression, some speed improvements, etc.
RAM -> RAM feature is somewhere at the bottom of my TODO list - i.e. it may be implemented in far future.
In addition, I avoid header files - since the whole source is placed at one CPP file.
I think it's easy to replace IO, you need some sort of...
2007-03-25 20:01:02 UTC in QUAD
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ilia_muraviev registered the QUAD project.
2007-02-21 19:05:12 UTC in QUAD
