Ok so the way a tv does things is like this


it renders the odd lines, and then the even lines, 
and that process goes 30 times a second, or 60 full scans per second.

normally on 30 fps video, it just scans the odd, and even lines of the
same image. 30 fps. Though if you feild render an animation at 60 fps.
Frame 1 on the odd lines frame 2 on the even lines. then on the second
image frame 3 on the odd, frame 4 on the even, etc... you can achieve
60 frames per second on an ntcs video screen.  Thus interlaced images
in the way vampir described are neccesary for 60 fps.

Post a reply to this message