GRASS VALLEY LDX Elite, Руководство пользователя

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LDX Series Software Upgradable Camera Platform User’s Guide (v3.1) 65
Chapter 5 - Video setup
5.5 Knee
Knee is a function that compresses the wide dynamic range of the video signal coming from
the imager into the more limited video output range.
5.5.1 Knee (in PowerCurves mode)
☞
Note
☞
Note
PowerCurves mode is not available in the LDX Flex version.
Knee can be set up as an automatic or variable function. It can also be switched off, which is
the default setting.
Press the KNEE button. The
KNEE SEL
item is shown. Use this item to select Auto, Var or Off.
In the camera menu, navigate to the
CREATIVE CONTROL > LEVELS > KNEE > KNEE
item and
select Auto, Var or Off.
Auto Knee
In Auto Knee, the Knee Point is fixed to 50% and Max In is set to 400%. The Limit Out can still
be adjusted between 100% and 118%. The circuitry automatically fades between the fixed
Knee curve and the linear curve.
Variable Knee
The following parameters in the Knee menu can be used to set up variable Knee in
PowerCurves mode:
• Kn Point/Point (0% to 90%): this is the video input level from which Knee starts
compressing.
• Kn OutLim/Limit Out (100% to 118%): the highest video level that is produced at the video
output.
• Kn Max In/Max In (100% to 800%): the maximum allowed video input level.
100% 200% 300% 400% 500% 600% 700% 800% 0%
0.0
100%
150%
50%
Limit Out
Max In
Input
Output
Point
Knee Curve
Linear Curve
OCP
CAM