Progressive segmented frame: Difference between revisions

Revision as of 02:04, 20 December 2016

Revision as of 03:24, 14 February 2017

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===Video recorders===

[[File:Sony-PSF-workflow.jpg|thumb|300px|right|Video capture, edit and delivery workflow using progressive segmented frame technique (Sony)]]

PsF is utilized in some [[DV]], [[HDV]] and [[AVCHD]] [[camcorder]]s for 25-frame/s and 30-frame/s progressive-scan recording. To achieve this, the camera acquires 30 ([[NTSC]]) or 25 ([[PAL]]) independent images per second. These images are output as 60 (NTSC) or 50 (PAL) interlaced fields. The result is a progressive-scan content, which is compatible with traditional interlaced scanning systems.

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The HDV Progressive Primer whitepaper mentions Progressive Segmented Frame mode:

{{quotation|'''Progressive segmentedScan Frame (PsF) recordingMode'''<br/>FrameIn splitthis mode, the captured image is divided into two segmentshalves, andthen recorded usingor theoutput as interlace signal. The halves are called segments, not fields, because there is no temporal difference between them. This method is samealso techniquecalled as interlacePsF (Progressive segmented Frame) recording. PsFThe Progressive Scan mode is asuitable progressivefor signalthe thatfeature canfilms, documentaries, music videos which have to be displayedrecorded as interlaced video for viewing on aninterlaced interlacemonitors, but want to offer “progressive-onlylook” monitorto their motion. UsedBesides, the video taken in “Progressivethe Scan”Progressive Scan mode can be edited and output as true progressive video if needed.<ref>{{cite book | title = HDV Progressive Primer | publisher = Sony | page = 911 | url = http://www.sony-asia.com/microsite/professional/hdv/pdf/HDV_Progressive_Primer.pdf}}</ref>}}

Consumer camcorders as well as most professional camcorders do not use PsF to record 24-frame/s video; instead they either record it natively in progressive form or apply [[Telecine#23pulldown|2:3&nbsp;pulldown]].