Overview; Standard Pulldown - Matrox MXO2 Installation And User Manual

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Overview

Depending on your project's video output format, you may choose to apply a
pulldown to convert 23.98 fps video to 29.97 fps or 59.94 fps video for output on
MXO2 (see
choose to enable Pulldown in the Video Output pane of the Matrox preferences
window (see
standard pulldown method to convert 23.98 fps to 29.97 fps or 59.94 fps video.

Standard pulldown

Standard pulldown is often used as part of the telecine process to transfer 24 fps
film footage to 29.97 fps interlaced video. This pulldown method is also used to
convert any 23.98 fps progressive video to 29.97 fps interlaced video, such as for
converting 486p @ 23.98 fps video to NTSC.
In order to convert 24 fps film or 23.98 progressive video to 29.97 fps interlaced
video, additional video frames, and more specifically video fields, must be
created and added to the video sequence. For example, to convert a sequence of
four film or progressive frames, five frames of video are needed for a total of 10
video fields. Therefore, one additional video frame or two video fields must be
created. To accomplish this, the first and third frames of a four-frame film or
progressive video sequence are each converted to two video fields. The second
and fourth frames of the sequence are converted to three video fields to make up
a total of five interlaced video frames.
The following diagram demonstrates the process:
Film frames @ 24 fps or progressive frames @ 23.98 fps
Video fields @ 29.97 fps
a1
Standard pulldown is accomplished by representing the first frame of film or
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
Appendix A, Understanding Pulldown
Appendix D, "Matrox MXO2 Supported Output
Chapter 7, "Configuring Your MXO2
A
a2 b1
Frame A Frame B
B
b2 b3 c1
Frame C
Formats"). If you
System"), Matrox uses the
C D
c2 d1 d2
Frame D Frame E
d3