Though the 480i signal is not upscaled by the dvd player, it is being upscaled by your tv. At the very least it is being converted to 480p. It may also be scaled to match the resolution of your display device. In all likelihood, your plasma is an EDTV, which matches the resolution of dvds. So there isn't any scaling going on (which is why EDTVs are so popular for DVD playback).
While you can't match high definition with a scaled standard dvd, you can get pretty satisfyingly close. It won't have the resolution of high def, but depending on the mastering and clarity of the standard dvd, you can get pretty close to high def with a good deinterlacer/scaler. The whole video processor area is for people trying to get the very best results they can from standard dvd. With technology from Gennum, Silcon Optix, and DVDO, you can do very well indeed. Of course, that comes at a cost.
Running a dvd player with component cables means that the digital signal on the dvd disc is converted to analog to go through the cables to your tv. The tv then converts the analog signal it receives back to digital. Depending on how good your dvd player and tv is in converting analog to digital and digital to analog, you may lose a fair bit of detail in the signal. HDMI and DVI are digital connections which allow you to retain the digital signal without any loss from the disc to the display.
The upconverting players will scale the dvd (720x480 or somewhere in that range) up to standard HDTV resolutions. But the main advantage with these new players is the all digital signal path. Some do a better job than others in the scaling.
If you are happy with what you are seeing, I'd say let it be. Just sit back and enjoy.
While you can't match high definition with a scaled standard dvd, you can get pretty satisfyingly close. It won't have the resolution of high def, but depending on the mastering and clarity of the standard dvd, you can get pretty close to high def with a good deinterlacer/scaler. The whole video processor area is for people trying to get the very best results they can from standard dvd. With technology from Gennum, Silcon Optix, and DVDO, you can do very well indeed. Of course, that comes at a cost.
Running a dvd player with component cables means that the digital signal on the dvd disc is converted to analog to go through the cables to your tv. The tv then converts the analog signal it receives back to digital. Depending on how good your dvd player and tv is in converting analog to digital and digital to analog, you may lose a fair bit of detail in the signal. HDMI and DVI are digital connections which allow you to retain the digital signal without any loss from the disc to the display.
The upconverting players will scale the dvd (720x480 or somewhere in that range) up to standard HDTV resolutions. But the main advantage with these new players is the all digital signal path. Some do a better job than others in the scaling.
If you are happy with what you are seeing, I'd say let it be. Just sit back and enjoy.