Originally Posted by charlievoviii
I totally disagreed wiht you. playing 23.976 movies using 60hz is now way is as smooth as playing it at 23.796.
Agreed , if you play back 23.976 material at 60Hz you will trigger uneven frame delivery , some frames will inevitably be repeated and this is fairly obvious in the motion presentation.
The only way to play 23.976 at 60Hz without trashing the motion presentation is to vector interpolate the frames up to 60Hz , this produces a whole range of unpleasant artifacts itself.
So the ideal way to present 23.976 material is with an "exact" refresh multiple so that all coherent frames are repeated at regular rates with consistent motion presentation. Exactly the same way that it happens in a cinema presentation be it film or digital projection.
There are a couple of routes to do this. The "simplest" technique is to ensure the video pipeline hardware has accuret timing reference and is in itself built to sufficent tolerance to provide consistent timing accuracy ( I doubt they get as accurate as 4 decimal places).
The other way is to resample the audio according to timing flucuations with the video stream in order to preserve sync wihtout having to drop or make irregular frame repeats. (Reclock and some EVR pipeline implimentation a case in point)