The PS3 will output Blu-ray at 1080i60, which holds exactly the same detail as 1080p at 30fps, only 1080i has the 30 frames split into two fields shown twice as fast, thus 1080i at 60hz equals 1080p at 30 frames per second And movie are 24fps.
And that's perfectly fine for movies. So 1080i is vastly superior to 720p in regards to film, especially if you got a 1080p tv. I mean I have an HD-DVD player that only outputs 1080i at the highest, but giving that to my 1080p tv will just about result in a 1080p picture, twice as good as if I picked 720p. Actually, all blu-ray players or HD-DVD players that claim 1080p output have to first convert the 1080p24 off the movie to 1080i60 with 2:3 conversion, then convert to 1080p60. So even if you have a 1080p tv and the PS3 and do 1080p for Blu-ray the movie was actually 1080i at one point.
But note, the PS3 and other players often do the last 1080i-to-1080p conversion better than most tvs would. Only way to get around that is if the player supports direct 1080p24 off the disc, which the PS3 does not yet, and then most 1080p tvs don't support that yet, some do. Most upcoming HDTVs will be 120hz and finally 24fps is dividable 5 times into that, so you'll get smooth motion since doing the 2:3 conversion to 30fps for 60hz tvs causes a jitter due by only duplicating some frames and not all evenly.
Now a 720p tv, most are actually native 768p (1366*768), so depending on how good the video processing is, giving the tv 1080i for movies and letting it downscale to 768p will hold more detail than upscaling lower 720p. But either way you'll end up with a 720p picture when choosing 1080i, just don't do that for games (which is a pain because 1080p games will want to default to 1080i since you can't just have a seperate resolution setting for blu-ray)
So overally 1080i on a 720p tv for movies is not bad, sometimes better, but usually no worse than 720p, just don't do 1080i for games.
Log in to comment