AJA FS1 Installation and Operation Guide

Reference Terms
Appendix E:
Glossary
3:2 Pull Down 3:2 pull down is a process where six frames are added to a film’s original 24frames-per-second
format so that it can work within the 30 fps NTSC
standard.
24P A term for 24 full frames per second digital video progressively captured. It
generally refers to the HD format of 1920x1080, although it is also used with
1280x720 images as well.
1080i Refers to a picture resolution of 1920 vertical pixels by 1080 horizontal pixels.
The “i” stands for interlaced scanning. Interlaced scanning is based on the
principle that the screen shows every odd line at one scan of the screen and
then all the even lines in a second scan.
1080p Refers to a picture resolution of 1,920 vertical pixels by 1,080 horizontal
pixels. The “p” stands for progressive scanning. This format works on the same
principle as 720p; the only difference is that in this type there are more pixels
and the resolution is better.
1080psf 1080psf differs from 1080p defined previously; PSF is an acronym for
“Progressive Segmented Frame”. Like 1080p, psf is progressive, but it differs
in that the data is written as two separate “fields” (but without inter-field
motion as interlaced video carries). This provides psf with the temporal
motion characteristics of progressive video, but with the data transport ease of
interlaced video. There should be no visual difference between the display of a
progressive frame communicated as 1080p, and the same frame
communicated as 1080psf.
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