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USING ADOBE PREMIERE PRO
Effects and transitions
Last updated 1/16/2012
Interlacing and field order
Interlaced video, noninterlaced video, and progressive scanning
Interlaced scanning of interlaced video fields compared with progressive scanning of noninterlaced video frame.
A.
For interlaced video, entire upper field (odd-numbered lines) is drawn to screen first, from top to bottom, in one pass.
B.
Next, entire lower
field (even-numbered lines) is drawn to screen, from top to bottom, in one pass.
C.
For noninterlaced video, entire frame (all lines in counting
order) is drawn to screen, from top to bottom, in one pass.
Interlacing
is a technique developed for transmitting television signals using limited bandwidth. In an interlaced
system, only half the number of horizontal lines for each frame of video are transmitted at a time. Because of the speed
of transmission, the afterglow of displays, and the persistence of vision, the viewer perceives each frame in full
resolution. All of the analog television standards use interlacing. Digital television standards include both
interlaced
and
noninterlaced
varieties. Typically, interlaced signals are generated from interlaced scanning, whereas
noninterlaced signals are generated from
progressive scanning
.
Chris Pirazzi provides technical details of fields and interlacing on
Lurker's Guide to Video website
.
Trish and Chris Meyer provide various materials about interlacing, field order, field dominance, field rendering, and
separating fields:
•
article (PDF) introducing interlacing and field separation on the
Artbeats website
•
article introducing interlacing and field order on the
ProVideo Coalition website
•
article clarifying meanings of the terms
field order
and
field dominance
on the
ProVideo Coalition website
•
video overview of fields and interlacing on the
Lynda.com website
•
For information about exporting a PsF (progressive segmented frame) video file from Premiere Pro via Adobe
Media Encoder,
see this thread
on the Premiere Pro user-to-user forum.
•
More about PsF video
.
More Help topics
“
Choose fields in the Source and Program Monitors
” on page 126
A
B
C
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