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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 to deliver progressive material for the end users; just one paragraph above he explains the technique to transfer movies to video: "Film is transferred to 575i video using 2:2 pulldown: Each film frame is scanned into two video fields (or frames); the film is run 4% fast."
==References==
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