Michael Jouravlev |
December 19th, 2007 08:15 PM |
Quote:
Originally Posted by David Heath
(Post 795598)
I don't believe that's true, and 1080psf/25 is what most HD broadcasts in Europe currently are - at least for drama etc.
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Yup, I know that 2:2 pulldown is the same thing as a segmented frame, I simply was not sure whether the term "segmented frame" assumed specific frame rate as well as specific usage. The section in Poynton's book is entitled: "Segmented Frame (24PsF)", but what does American engineer know about PAL? ;) Interestingly, he is not fond of this scheme: "Proponents of the scheme claim compatibility with interlaced processing and recording equipment, a dubious objective in my view." I don't think he objects using segmented frame for distribution purposes, but rather using it for acquisition and mastering. This just made me thinking that "PsF" is a term used for production, while "2:2 pulldown" is a term used for broadcast.
I agree that the display should either read the flags or detect the cadence, but without proper progressive/pulldown flags, the process of identifying 25p in 50i video seems to be a harder task than identifying 24p in 60i video.
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