sasimirobot said:I cant tell the difference between a DVD upscaled by Xbox Media center 720p/1080i and 480p
My Sony Wega Super Fine Pitch HDTV set is kinda small so that may be the problem.
The size of your display may be part of the problem - you'd certainly appreciate more resolution on a big screen or projector - but I don't think XMC is really a good way to judge the merits of DVD upconversion. All DVD upconversion is not created equally - I doubt your Xbox's upconverting quality is anywhere near as good as a fast PC with FFDShow or a Faroudja scaler.
With upconversion on FFDShow on a PC, I can only personally attest that there can be a dramatic difference. Maybe I'm noticing it more because it's on a projector, but even taking screencaps of before and after displays a big difference. Obviously results depend on the source - not all DVD transfers are of a high quality - but it continually amazes me how more detail can be brought out of a standard DVD with upconversion. The latest Star Wars DVD, upconverted, is breathtaking. Is any of this as good as a hidef DVD? No. But it's the next best thing, and a nice way to offset the "hurt" of switching to a new movie format (you'll probably only end up replacing your favourite movies, if that, or one's with bad DVD transfers).
I took some screencaps a while ago of "before and after" with upconversion using ffdshow, but I can't put my hands on them now. But, for example, where the texture of frodo's clothes in LoTR was blurry at the normal resolution in one shot, the same shot upconverted revealed the actual weave in the cloth. You could see individual hair where before they were blurry. The difference was great, imo.