ATI's UDV Technology equivalent?

Hi!

I'd like to know if I can use an old PC with a Pentium 4 2.8GHz Northwood processor to run full HD videos as an HTPC Media Center. I've done some tests already, and I know the processor alone can't render anything above 480p properly, so I'm thinking about buying a ATI card with UDV acceleration support (like an old HD2400 or something).

So my main question is, what is (if there's any) NVIDIA's equivalent for ATI's UDV Technology?

Thanks!