"Normal" upscaling is usually the best choice. "Full" takes 4:3 video and stretches it to the full width of the screen. I sometimes use that for non-animorphic widescreen DVDs, and combine it with the Zoom feature of my TV to get them to fill the screen. "Double" first scales to 720p and then to 1080p. Some people like the artificial sharpening it adds to the picture--I don't.

There are three different noise reduction settings:
Frame, is over-all temporal noise reduction which averages the color changes of pixels over time. I set this one to 0.
Block, is applied in the video codec to soften macroblock artifacts. I set this to 1.
Mosquito, again is applied in the video codec, it reduces artifacts inverse discrete cosine transform where there's a soft texture next to a hard edge. I set this to 2.


Pioneer PDP-5020FD, Marantz SR6011
Axiom M5HP, VP160HP, QS8
Sony PS4, surround backs
-Chris