DARK archiver

[encode]

Check out some excellent BWT+DC-based archiver:
http://darchiver.narod.ru/

The power side of its compression algorithm is very efficient sorting. Additionally, it uses some tricks like fragmentation, reverse order sorting, ...

Sadly, but the author is gone from the data compression scene. We all had a nice conversation with him at old forum... It would be interesting to talk with him about my BWT-compressor...

[elektronika]

Sadly, but the author is gone from the data compression scene. We all had a nice conversation with him at old forum... It would be interesting to talk with him about my BWT-compressor...

What do you mean by gone from the data compression scheme?

[kvark]

Hi everyone!
Sorry for being so late...

I'm not entirely "gone", I just switch between 3-4 research directions from time to time. At that point I had already spend too much time on compression, became almost depleted, so I moved to 3D graphics.

The official page for my BWT efforts is here:
http://code.google.com/p/adark/

Bad news is that no improvement on the compression scheme has been made since the old dark-0.51 times. Just a couple of suffix sorting ideas were developed.
Good news is ... you can find all the sources there in free access

Cheers,
Dzmitry

[Black_Fox]

Hey kvark, welcome back :-)

[kvark]

Thank you, Black_Fox.

I'm happy to see this forum is still active and very alive!

[biject.bwts]

Hi everyone!
Sorry for being so late...

I'm not entirely "gone", I just switch between 3-4 research directions from time to time. At that point I had already spend too much time on compression, became almost depleted, so I moved to 3D graphics.

The official page for my BWT efforts is here:
http://code.google.com/p/adark/

Bad news is that no improvement on the compression scheme has been made since the old dark-0.51 times. Just a couple of suffix sorting ideas were developed.
Good news is ... you can find all the sources there in free access

Cheers,
Dzmitry

Nice to see someone using BWT and DC. My code is slow but I wonder if you ever thought about using BWTS instead of BWT?

I also think that the version I have where I have a true bijective version for DC however I never took full advantage of what should be done after the BWTS DC stages so I just convereted to to Fibonacci numbers which are easy to make bijective.

I am sure you stuff compresses better but there may be a few tricks you missed in the DC stage. Since it should be bijective to file of numbers and its usually not represented that way.

Please look at http://encode.ru/threads/1179-BIJECTIVE-BWTS-DC-FIB and see what you think of it.

[encode]

Yet another post-Soviet programmer crossed the border...

[Surfer]

Yet another post-Soviet programmer crossed the border...

Just because we have most bullshit government in last 90 years(not including Eltsin)..