> A very serendipitous observation about AC - you're right about using > CODE-LOW - we realised this when we started work on optimising the > arithmetic decoder in Schro a couple of weeks ago, and this together > with other improvements give about a 30% speed-up. We'll be committing > these next week I guess.
That's great to hear. I actually was a bit surprised when I didn't see this optimisation already in the schroedinger source. > I think I'll probably add this as an informative note, since a) the > original structure corresponds to the usual description of > renormalisation in the academic literature and b) it is the same as in > the SMPTE spec which is nearly ratified, and which I therefore don't > want to change at this very late stage. It will be really useful to have > some more implementation notes in there, though. That's fine, I guess, as long as it's somewhere in there. Another point I just remembered: 9.6.2: "Arithmetic coding is not supported on Inter pictures." This confused me a bit. Don't Inter pictures always use arithmetic coding? Regards, Dennis ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Schrodinger-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/schrodinger-devel
