Stephen Pollei wrote:
On 8/28/06, Lourens Veen <[EMAIL PROTECTED]> wrote:
On Monday 28 August 2006 16:38, Timothy Miller wrote:
> On 8/27/06, Dieter <[EMAIL PROTECTED]> wrote:
> > I've been researching this a bit. Preliminary conclusion is that
> > the OGC card needs to provide XvMC.
Without having looked at it in detail, some thoughts. We need to do two
things: motion compensation, and iDCT.
http://www.xfree86.org/~mvojkovi/XvMC_API.txt it
I reckon there are some people at the Theora lists that know much more
about this stuff than we do. Perhaps we should ask them what they would
like to have?
Also maybe not for this version of the card but later might look into
http://dirac.sourceforge.net/index.html
It uses wavelets and not Inverse Discreet Cosine transforms AFAIK.
They also use "overlapped block motion compensation".
http://dirac.sourceforge.net/documentation/algorithm/upconversion/index.htm
Up-conversion and down-conversion of pictures - Fast up-conversion
and down-conversion used in motion estimation and compensation
http://dirac.sourceforge.net/documentation/algorithm/global_motion/index.htm
Global motion estimation - Approximation of global motion between frames
Wavelets (small 2D FIR filters) are a superior technology for
compression. This is what JPEG-2K uses. However, MPEG is based on
block oriented DCT and that is what we need to decode.
--
JRT
_______________________________________________
Open-graphics mailing list
[email protected]
http://lists.duskglow.com/mailman/listinfo/open-graphics
List service provided by Duskglow Consulting, LLC (www.duskglow.com)
