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Re^2: Specialized data compression

by wanna_code_perl (Pilgrim)
on Sep 16, 2012 at 16:12 UTC ( #993927=note: print w/replies, xml ) Need Help??


in reply to Re: Specialized data compression
in thread Specialized data compression

Thanks for the suggestions! It took me a few days to think this through and try some things.

Indeed, per your suggestion I have tried deltas for x,y,z, although they don't all fit in 8 bits (some deltas will of course overflow 16-bit as well), so I use a variable width int (8, 16, or 32 bit), which was a pretty big win, even after compression.

The bitwise transposition you refer to is interesting, but was complex and didn't change things much once xz got ahold of it.

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[Discipulus]: ah thanks i forgot that thread (even if i saved it in my homenode)..
[Discipulus]: the node i discovered yesterday nigth was also interesting

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