QUOTE(Pr1me_Minister @ Feb 27 2010, 10:35 AM)
Technically you could apply post-processing (sharpening, noise reduction, upscalling) to the Xbox's video output by connecting it to the computer.
True. But you will also need video capture equipment. And I don't know many video capture cards offhand that can receive component 1080

But if do buy such equipment and do that with a 360, you can also do that with a PS3 or Wii. Or just about any video input source including Astro SD video. Possibilities are endless

Seriously tho, it's possible technically. But then:
1. You need to invest in a HD-capable video capture device (which I can tell you, is not cheap) and good video cards.
2. You need a program that can take the video frame, enhance it with AA and smoothing (and maybe upscale), and push it to the display. Bonus points if you use the good video cards' shaders to do that. More bonus points if you can take advantage of SLI/Crossfire. I do not know any program offhand that can do that, and
3. You need (2) to be able to do that as fast as possible, best within a few microseconds.
#3 will be the biggest issue, all video capture devices will introduce audio-video lag, although lag time will differ by card and program used (I have a old Mac G3 with Hack TV, and that has virtually no lag. On the other hand, my HTPC has a unbelievable 5-second lag when using Windows MCE). Getting a software that can take an input, upscale it to 1080 if it's SD, and then apply AA and smoothing and push the video to the output display fluidly within a usable timeframe can be a monumental task.
Also, does enhanced SD image upscaled to HD qualifies to be called a HD image?
This post has been edited by RAMChYLD: Feb 28 2010, 12:38 PM