Lone_Canis_Lupus said:
I thought the point of 3:2 pulldown was to support 60Mhz HDTVs so the video wouldn't be moving faster than it actually should. Which is why 120Mhz TV's are good because instead of adding different amounts of frames each time so it actually plays at the right speed, you only have to add 5 frames for 24fps movies and you only have to add 4 frames for 30fps movies. So 1080p with 3:2 pulldown is still displaying all the lines on the screen...just adding a different amount of frames in certain intervals to make 24fps match 60Mhz(60fps). Or am I mistaken? |
You're right about the benefit of 120 Hz displays (72 Hz displays do the same thing, but repeat each frame 3 times instead of 5).
I guess what I'm really talking about is reverse 3:2 pulldown. The people who author the DVD perform the 3:2 pulldown when they encode the film. The actual DVD data is encoded in 60 fps, with the frames duplicated 3 times, then 2 times, etc. (you obviously know how that part works). So when you play it back, there's no frame duplication that needs to be done, it just streams right off the disc. When I said "a display that supports 3:2 pulldown" I meant that a display can reverse this process when it receives an interlaced signal, and thus display the film in progressive scan.
