2:3:3:2 Advanced Pull-Down
Camcorders such as the Panasonic AG-DVX100, the Panasonic AG-HVX200, and the Canon
XL2 use this method to store 23.98 fps video within interlaced 29.97 fps footage. Video
frames 1, 2, 4, and 5 in the pull-down pattern represent film frames A, B, C, and D.
Removing advanced pull-down is more efficient than removing standard 2:3:2:3 pull-down
because no deinterlacing is required. To remove advanced pull-down, video frame 3 in the
five-frame pattern is simply discarded during capture or ignored during playback.
Another feature that makes advanced pull-down removal more efficient is the insertion
of “flags” in the video signal that can be used by software to automatically detect which
frames must be removed. This makes advanced pull-down an automatic process
compared to the manual cadence identification usually required to remove 3:2 pull-down.
A
B
A
B B
C
C
C D D
A A B B B C C C D D A A B B B C C C D D A A B B
C C C D D A A B
B
B
C
C
C D D A
B
A
B B
C
C
C D
B
D
A
B
A
B B
C
C
C D D
A A B B B C C C D D A A B B B C C C D D A A B B
C C C D D A A B
B
B
C
C
C D D A
B
A
B B
C
C
C D
B
D
Before
(23.98 fps)
A
B
C
D A
D A
B
C
D A
B
C
D A
B
C
D
A B
C D
B
C
A
B
C
D
A A
B
B
C
D
D
Field
1
Field
2
Field
1
Field
2
Field
1
C
Field
2
Field
2
Field
1
B
Field
1
C
Field
2
A
B
C
D A
D A
B
C
D A
B
C
D A
B
C
D
A B
C D
B
C
2:3:3:2 Pull-Down
After
(29.97 fps)
Before
(29.97 fps)
After
(23.98 fps)
One second
2:3:3:2 Pull-Down Removal
A
B
C
D
A A
B
B
B
C
C
C
D
D
Field
1
Field
2
Field
1
Field
2
Field
1
Field
2
Field
1
Field
2
Field
1
Field
2
Appendix C
Working with 24p Video
421
V
Despite its efficiencies, the advanced pull-down pattern is not as aesthetically pleasing
as 3:2 pull-down. If you plan to finish your project at 23.98 fps, advanced pull-down is
usually the best choice. However, if you plan to output your final 24p project to
29.97 fps interlaced video, you may want to add 3:2 pull-down because its pattern
is considered to be more visually appealing.