[XviD-devel] Early SKIP and early DC-only

[Michael Niedermayer]

Hi

On Monday 21 April 2003 19:26, Marco Al wrote:
> From: "Christoph Lampert" <chl at math.uni-bonn.de>
>
> > > hard to comprehend how MPEG4 ended up with its braindead scheme.
> >
> > Hm, I didn't find it that bad. What do you dislike about it?
>
> In p-frames the skip decision in MPEG4 is tied to the coding of backgrounds
> in static camera and animation shots ... and can sometimes be abused for
> coding different things.
>
> The skip decision should be tied to the predictibility of a MB, not tied to
> specific forms of video ... so that means not taking 0,0 as the MV of a
> skipped MB, but the predictor (like H.264, which AFAIK defaults to using
> the predictor as the MV for skipped blocks ... only using 0,0 if any of the
> MVs used for prediction is 0,0).
btw, see: 
ftp://ftp.imtc-files.org/c:/inetpub/ftpsites/imtc/jvt-experts/2002_05_Fairfax/JVT-C027.doc

[...]

-- 
Michael
screen[y][x] ^= cursor[cy][cx];			(violates patent #4,197,590)
median(mv[y-1][x], mv[y][x-1], mv[y+1][x+1]);	(violates patent #5,905,535)
buf[i]= qp - buf[i-1];				(violates patent #?)
for more examples, see http://mplayerhq.hu/~michael/patent.html
stop it, see http://petition.eurolinux.org & http://petition.ffii.org/eubsa/en