Progressive segmented frame: Difference between revisions

Revision as of 02:44, 20 December 2007

Revision as of 02:45, 20 December 2007

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Progressive segmented frame technique is equivalent to [[Telecine|2:2 pulldown]] pattern. "PsF" seems to be a term used in production, while "2:2 pulldown" is a term used for broadcast.

Charles Poynton, an authority in digital television, makes the following remark in his book: "Proponents of [PsF] scheme claim compatibility with interlaced processing and recording equipment, a dubious objective in my view."<ref>{{cite web|url=http://books.google.com/books?id=ra1lcAwgvq4C&pg=RA1-PA62&vq=segmented+frame&dq=segmented+frame&sig=8ZAl0RqzUYnyxQSmjxiIw4ZJDbE|title=Charles Poynton, "Digital Video and HDTV: Algorithms and Interfaces"}}</ref> He does not question the usefulness of progressive segmented frame for broadcast purposes; just one paragraph above he explains the technique used to transfer movies to video: "Film is transferred to 575i576i video using 2:2 pulldown: Each film frame is scanned into two video fields (or frames); the film is run 4% fast."

==References==