Originally Posted by chicagofan
Hmm. I kind of follow but not completely. Maybe to put it another way, does it make a difference if I:
1 - Output an HD-DVD signal from my Xbox 360 at 1080i with a component cable, through an upscaling receiver, to an 1080p projector which then shows the picture at 1080p; or
2 - Output an HD-DVD signal from my Xbox 360 at 1080p with a DVI/VGA connection, through an upscaling receiver, to an 1080p projector which then shows the picture at 1080p
At worst, the effect of "upscaling" to HDMI is putting a lower resolution video source on a higher resolution display, and adding extra artifacts in the process because of a poor quality implementation.
At best, the effect of "upscaling" is displaying a lower resolution source on a higher resolution display while, using special processing, filling-in some of the missing resolution (information) to improve the apparent quality of the lower resolution source video when it is displayed on the higher resolution display.
You hope for the later, but sometimes you get something more like the former.
For your situation, I do not think option 2 will work. Are you saying you want to put a "D-sub -> DVI" adapter on the VGA 360 output, and then put an HDMI adapter on the DVI connector in order to move the output to your HDMI receiver? I can't imagine how else you get 1080P from the VGA (D-sub) output to your HDMI/component receiver. Also, you mention VGA/DVI and this also leads me to ask that question.
If that is your plan, the problem is there are different kinds of DVI. There is DVI Digital and DVI Analog. A D-sub to DVI adapter makes a DVI Analog signal. This is not compatible with HDMI, at all. You can't get there from here.
If that was not your plan, how do you propose to get 1080P from a non-elite 360 into your receiver in your option 2, above?
Regardless, however, you will be fine with option 1. Well, in all likelihood you will be fine. Converting from 1080i over component to 1080P over HDMI should not be easy to substantially screw up for a competent transcoding/upscaling HDMI receiver. You should get pretty good results from Option 1, in other words.