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I find that the HR10 does a better job of upscaling 480i than my TV which has a native resolution of 768p. I tend to leave the HR10 on 720p or 1080i for 480i stuff (doesn't seem to make a noticeable difference which one I choose...bad looks bad. :p ). 1080i content looks slightly crisper when fed to the TV at 1080i while 720p looks slightly smoother when fed at 720p, which makes sense since it's taking one of the scaling steps out of the equation. If I feed 1080i to the TV at 720p, then the HR10 downscales to 720p and the TV upscales that to 768p. It's better to just have the TV downscale 1080i to 768p itself and cut out the middle man. Same goes for 720p.

To swap I just have the up arrow programmed to toggle between 720p and 1080i. The difference isn't huge, but it's enough that I notice and makes it worth the extra button press. My wife on the other hand doesn't care and leaves it wherever it was last.

BTW, the HR10 doesn't tell you what resolution it's receiving (if it does, please tell me how to view that info). But basically Fox, ESPN, and ABC are 720p and everything else HD is 1080i.
 
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