I respectfully beg to differ. My understanding is that the a750s are native 1080p set. Therefore, every source that is not 1080p is up-converted by the set to 1080p (unless another component--PS3, A/V receiver--does it before the source gets to the set). That being said, that does not mean that a 480i source being upconverted to 1080p is going to have the same picture quality as a source that is 1080p (e.g. Blu-ray movies with a good transfer from the master to 1080p with a high bit-rate).
Also as I mentioned previously, I believe there are some components that do a better job of upconverting (e.g. PS3) than the a750 itself.
sixfoot...I am not familiar with your Denon tuner, so I couldn't help with settings. However, I believe some Denons use the Faroudja video processing which I understand to be one of the best for upconverting. However, I also know that some of the Denon models don't necessarily upconvert when passing through them. UPDATED EDIT: Sixfoot, I just checked the specs on your Denon, and it appears to have Faroudja, so you should have a better picture. Perhaps you should double check your A/V Receiver settings to be sure everything is in order. Also, what are you using to play the DVD (does it have upconversion too?).
So, don't confuse the source content with what is happening in the set (or other connected component) when it up-converts the source.
That said, all the DVDs I've viewed on the 67a750 via PS3 (with HDMI connection and PS3 up-convert set to "normal") have looked significantly better than on my old (now deceased) SD 50'' RPTV using an old 480i DVD player.
Originally Posted by Brian1313
No way HD tvs upconvert everything....it ain't gonna be in true HD if the source coming into the TV is not HD. The SD channel I have on right now is not being upconverted.