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2:3:3:2 pulldown (advanced)
frame (frame C) as two fields (fields c1 and c2), and the fourth frame (frame D)
as three fields (fields d1, d2, and d3). This sequence repeats six times each
second.
2:3:3:2 pulldown (advanced)
2:3:3:2 pulldown, also known as advanced 2:3:3:2 pulldown, was developed as
an alternative to the 2:3:2:3 pulldown method for making frame rate conversions
in DV video. It is used to convert 486p @ 23.98 fps video to NTSC (486i @
29.97 fps) video. This conversion is used when video footage is acquired by a DV
camera at 23.98 fps and recorded to DV tape with the recorder set for advanced
pulldown (called 24PA or 24P Advanced mode on some devices). 2:3:3:2
pulldown differs from 2:3:2:3 pulldown in that the two middle frames of the
video sequence are each converted to three video fields.
The following diagram demonstrates the process:
Advanced 2:3:3:2 pulldown is accomplished by representing the first frame of
progressive video (frame A) as two fields of video (fields a1 and a2), the second
frame (frame B) as three fields of video (fields b1, b2, and b3), the third frame
(frame C) as three fields (fields c1, c2, and c3), and the fourth frame (frame D) as
two fields (fields d1 and d2).
ABCD
a1 a2 b1 b2 b3 d1c3c2c1 d2
Progressive frames @ 23.98 fps
Video fields @ 29.97 fps
Frame A Frame C Frame DFrame B Frame E