Quote:
Originally Posted by
benbess 
Sorry for the silly question, but is there really a clearly visible difference between 1080i and 1080p? Say on a 42" Sony Bravia (what I've got)?
Not silly at all, people have tried to fool us for commercial reasons.
Only (potentially) would differences be visible if those are images of real-time recordings, like TV-camera recordings (video). In that case, it makes a difference if the "odd" (-lines) image part is recorded after the "even" (-lines) part or not. And the difference will only be visible then if it is projected on your screen the wrong way (e.g. wrong sequence; theoretically that can also be caused by a wrong 3:2 pull down sequence, but that's not relevant when we're talking about BD).
However...
When a movie frame is scanned, the whole picture ("odd" plus "even" lines after scanning) is readily present (as a "photo", you could say) and frozen in time together, so it doesn't make any difference at all in which sequence the pixels are subsequently transported and finally put back into the frame you are looking at. All that matters is that they arrive at their proper place in the image buffer of your TV - and in time. Of course this is exactly what the system carefully does.
So - unlike some marketing tried to tell us - there is no difference at all between a properly displayed 1080i and a 1080p image once you see it with your eyes. Both have exactly the same image resolution: 1080 horizontal lines (and 1920 vertical columns). This is called a 1080 vertical resolution x 1920 horizontal resolution (sic!) image.
Both images (interleaved or progressive) would exactly be equal and are thus of exactly the same picture quality.
Cees