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10.4.14 White Line Menu
The IVS can generate information on whether the current
video image corresponds to a new lm frame or whether
it is a repeated video image. The White Line ag displays
this in machine readable form.
• Enter the White Line Menu from the Main Menu.
Changes made to settings are immediately activated.
Check all settings on a correctly adjusted monitor.
All video assists are based either on PAL or NTSC video
systems, with a xed video frequency of either 25 full
video frames per second with PAL or 29.97 full video
frames per second with NTSC. The speed of the lm
camera on the other hand can be selected over a wide
range. At every lm speed which is different from the
video frequency, the IVS has to add repeated video elds
to compensate for the different frame rates.
In practice the most important case is a lm camera speed
of 23.976 fps and a NTSC video assist.
This creates a situation described in the drawing.
MENU WHITE LINE
-> - WHITE LINE ON
- POSITION 10
- EXIT
Film
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Film
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Film
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Film
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A1 A2 B1 B2 B3 A1 A2 B1 B2 B3
Video-Ait-Sytem
