[XviD-devel] Changes to get_pmv2
T.R.Jacobs at lboro.ac.uk
Tue Oct 5 12:38:21 CEST 2004
I'm back to threading xvid after a week or so writing reports and have a few
(probably basic) questions about the variables and bitstream.
I'm kinda confused by mv16, mvs and pmvs. which one of these are the
differential prediction that is written to the bitstream and thus the one i
will need to recalculate? are all 4 values of the array written or just a
i know these are probably simple questions but they are kinda confusing me.
also has anyone got a url for the actually iso mpeg4 standard? this would
help me with some of these questions i would guess.
Quoting Christoph Lampert <chl at math.uni-bonn.de>:
> On Wed, 22 Sep 2004, Tom Jacobs wrote:
> > hi
> > my work on mpeg2 has only been simulated in an ideal SimpleScalar
> The software from ftp://ftp.cs.wisc.edu/sohi/Code/simplescalar ?
> > so no realworld results. but it did show a 96% complexity reduction for
> > processors on a 320x240 image.
> Hm, can you explain that? 96% complexity reduction means what?
> That 20 CPUs in parallel need only 4% of the time that 1 CPU needs?
> That would be a speedup factor of 25, which I supposed is impossible
> (well, at least very unlikely).
> And how did you parallelization look like? Just ME? Or everything?
> I'm really curious, because I did some experiments with parallel video
> encoding a while ago myself. If you stuff is "private", maybe we can
> discuss via private mail: gruel at gmx.de
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