Hi
Just to make it simple to understand, 23.98P is for progressive frames in drop-frame timeline.
The frames are captured/displayed as complete images (just like still pictures).
23.98Psf is basically same as 23.98P when displayed because they both are progressive frames.
However, the difference is during the capture of the frames in camera. Instead of capturing
the frame as a complete image as in Progressive method, PsF captures odd and even fields
of the image and later combine them to complete the frame as a whole picture. It is different from
"interlaced" since the two fields are combined before the recording media. After this process, the
frames live as progressive.
Hope this makes sense.
Nook Kim
www.nookkim.com