[XviD-devel] question about gmc

skal skal at planet-d.net
Fri Mar 7 13:08:32 CET 2003


	Hi,

On Thu, 2003-03-06 at 18:10, Christoph Lampert wrote:

> 
> GMC can be switched on/off for every frame. In fact one just decides
> whether to use P-VOP (no GMC) or S(GMC)-VOP (with GMC). At the moment, 
> S(GMC) is chosen if and only if non-translational global motion is
> detected. You can also decide whether to use GMC on a macroblock level,
> this is just SAD based, so there is plenty of room for optmization.

	btw,
	Did someone (Radek?) tried using the average motion vector from
	previous frame as (EPZS) predictor also?? I think i works well
	for sequences taken from a DV camera, but I'm not sure...
	(and it might help GMC, too...)

	bye,
			Skal




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