Similar technologies Progressive segmented frame

1 similar technologies

1.1 2:2 pulldown (tv broadcast)
1.2 palplus film mode (tv broadcast)
1.3 video recorders

similar technologies
2:2 pulldown (tv broadcast)

2:2 pulldown used in 50 hz interlaced television systems broadcast progressive material recorded @ 25 frame/s, used in 60 hz systems. 2:2 pulldown scheme had been designed interlaced displays, fine vertical details filtered out minimize interline twitter. psf has been designed transporting progressive content , therefore not employ such filtering.

palplus film mode (tv broadcast)

palplus utilizes digital stream embedded in interlaced analog tv signal called widescreen signaling, which, among other data, describes whether signal should treated interlaced ( camera mode ) or progressive( film mode).

video recorders

psf utilized in dv, hdv , avchd camcorders 25-frame/s , 30-frame/s progressive-scan recording. achieve this, camera acquires 30 (ntsc) or 25 (pal) independent images per second. these images output 60 (ntsc) or 50 (pal) interlaced fields. result progressive-scan content, compatible traditional interlaced scanning systems.

this how sony described progressive recording mode in operating guide 60 hz ( ntsc ) sony dcr-hc96 camcorder:

note on progressive recording mode

in normal tv broadcast, screen divided 2 finer fields , these displayed in turn, every 1/60 of second. thus, actual picture displayed in instant covers half of apparent picture area. in progressive recording, picture displayed pixels.

the booklet 50 hz ( pal ) sony dsr-pd175p camcorder describes progressive recording mode follows:

progressive scan mode

the 25p image captured sensor system recorded interlaced signal dividing each frame 2 fields. enables compatibility current editing , monitoring equipment accept interlaced signals, while maintaining quality of 25p image.

the operating instructions 60 hz ( ntsc ) panasonic pv-gs500 camcorder describe progressive recording mode follows:

pro-cinema function

in addition effects when wide function used, images can recorded @ rate of 30 frames second strobe-like effect.

the hdv progressive primer whitepaper mentions progressive segmented frame mode:

progressive scan mode

in mode, captured image divided 2 halves, recorded or output interlace signal. halves called segments, not fields, because there no temporal difference between them. method called psf (progressive segmented frame) recording. progressive scan mode suitable feature films, documentaries, music videos have recorded interlaced video viewing on interlaced monitors, want offer “progressive-look” motion. besides, video taken in progressive scan mode can edited , output true progressive video if needed.

consumer camcorders professional camcorders not use psf record 24-frame/s video; instead either record natively in progressive form or apply 2:3 pulldown.

most video formats including professional ones utilize chroma subsampling reduce amount of chroma information in video, taking advantage of human visual system s lower acuity color differences luminance. such reduction improves compression of video signal, desirable because of storage , transmission limitations. ensure compatibility interlaced-based systems, chroma information in psf video recorded in interlaced format, despite content progressive. may result in interlaced artifacts being noticeable on colored objects.