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With PsF, a progressive frame is divided into two ''segments'', with the odd lines in one segment and the even lines in the other segment. Technically, the segments are equivalent to interlaced ''fields'', but unlike native interlaced video, there is no motion between the two fields that make up the video frame: both fields represent the same instant in time. This technique allows for a progressive picture to be processed through the same electronic circuitry that is used to store, process and route interlaced video.
The term ''progressive segmented frame'' is used predominantly in relation to [[high-definition video|high definition]] video. In the world of [[standard-definition video]], which traditionally has been using interlaced scanning, it is also known as ''quasi-interlace'',<ref name="POYNTON_DVANDHDTV_P62">{{cite book|url=https://books.google.com/books?id=ra1lcAwgvq4C&pg=RA1-PA62|title=Charles Poynton, Digital Video and HDTV: Algorithms and Interfaces|isbn=9781558607927|last1=Poynton|first1=Charles|year=2003|publisher=Morgan Kaufmann }}</ref> ''progressive recording''<ref name="DCR-HC36/HC46/HC96 OG PR">{{cite web|url=http://www.docs.sony.com/release/DCRHC36-46-96.pdf |title=DCR-HC36/HC46/HC96 Operating Guide |publisher=Sony Corporation |year=2006 |accessdate=2010-08-11}}</ref> or ''movie mode''.<ref name="WSS">{{cite web|url=http://stoneship.org.uk/~steve/palplus.html|title=All You Ever Wanted to Know About PALplus but were Afraid to Ask}}</ref> Other names for PsF used by electronic equipment manufacturers include ''progressive recording'' (Sony), ''progressive scan mode'' (Sony), ''progressive shutter mode'' (Sony), ''frame shutter mode'' (Sony), ''frame mode'' (Panasonic and Canon), ''Digital Cinema'' (Panasonic), ''Pro-Cinema'' (Panasonic) and ''Cinema mode'' (Canon).
== History ==
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* '''24PsF''' (48sF, 1080sf24, 1920×1080/24/1:1SF) is the original PsF format, which is used in professional equipment for film-to-video transfer, for high definition mastering and for video exchange between networks. This may be the first universal video standard which transcends continental boundaries, an area previously reserved for film.<ref>{{cite web|url=http://www.filmmaking-careers.com/film-production.html|title=Steve Wiedemann, 24/P HDTV: The Fall of Film Production}}</ref>
* '''25PsF''' (1080sf25, 1920×1080/25/1:1SF) is used in 50 Hz systems for production that originates on video and is targeted for television distribution.
* '''29.97PsF''' (1080sf29, 1920×1080/29.97/1:1SF) formats are sometimes used in 60 Hz systems for sitcoms and music shows.<ref>{{cite web|url=http://www.avsforum.com/avs-vb/showthread.php?p=13998888#post13998888|title='Beside You in Time' by Nine Inch Nails was encoded as interlaced.|date=March 2005 }}</ref><ref>{{cite web|url=http://hometheatermag.com/discplayers/sony_bdp-s350_blu-ray_player/|title=Sony BDP-S350 Blu-ray Player review}}</ref> 29.97PsF as well as '''30PsF''' (30p, 1080sf30, 1920×1080/30/1:1SF) formats are gaining popularity as an acquisition format for Web video delivery, because most video hosting web sites cannot stream video with rates higher than 30 frame/s.
==References==
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