Thanks and hope you don't mine all the questions. I think I have it now but I want to back up to one question:

>This actually brings up one of the long-standing challenges encountered by progressive scan DVD players when deinterlacing - some material started life at 24fps and some (such as many, but not all, TV shows on DVD) started life at 60fps.>

Do some TV shows do use 24fps cameras? I wonder how they decide if this is the case?

Bob

Some TV shows have been shot on film over the years rather than video, generally for creative reasons (preferred the look of film over video) or because they pre-dated video tape (the original Star Trek was shot on film, for example).

(preferred the look of film over video)

Can you see a differnce, I have alwasy noticed something differnet about TV shows during outside shots?

Bob

It is possible to shoot video in 1080/24p, and it is certainlly possible to shoot on film and transfer it that way.

PodBoy's right, of course, although in the past (even just a few years ago) it was not possible to achieve 1080p/24 with video.

Video is going to be cheaper and easier to work with as a general rule, but until recent improvements in video technology it came at the expense of resolution and picture quality. That didn't matter in the days of smaller TV screens and analog video delivery (over-the-air or cable), when the delivery method itself leveled the playing field to a great degree, but digital delivery, bigger screens, and especially HD have changed all that.

Thanks gonk for all the insight. Bob

Okay, my turn, now!

I don't understand why pixel-based displays can't display interlaced images. Say I have a 1080X1920 display - can't it display 540 even lines, with "blacked out" odd lines, and then 1/60 of a second later display 540 odd lines, with "blacked out" even lines? Isn't that essentially what a CRT does?

Bruce,

The CRT takes advantage of the fact that the phosphors on the inside of the tube take a while to fade out -- the unpainted line will continue to glow while the other lines are being painted.

Obviously, LCDs don't do that. You must supply voltage to them constantly.

B