Apple Final Cut Pro 6 User Manual
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Color Correction and Video Quality Control
Custom Saturation Limiting Controls
 Enable: Select or deselect the checkbox to enable or disable the Custom Saturation
Limiting controls.
Note: You can still adjust the sliders below, but they have an effect only when this
checkbox is selected.
 Clamp Above: All chroma values above this parameter value are clamped to the
parameter value. The lower you set this value, the more clipping occurs.
 Max. Output: Compresses the range of values between the Start (Threshold) and
Clamp Above values so the maximum output value is the value set here. Setting this
value higher than the Clamp Above value has no effect. Values below the Start
(Threshold) value clip the signal.
 Start (Threshold): Defines the lowest value affected by the Custom Saturation
Limiting controls.
 Reduce Chroma/Luma: When the combination of the luma and chroma signals is
too high and the Broadcast Safe filter can reduce either luma or chroma to make
the combined signal legal, this parameter determines how much luma and chroma
are reduced. When the slider is set to 100 (centered), the filter reduces luma and
chroma equally.
Note: The Custom Luminance Limiting and Custom Saturation Limiting controls are
effective only when you choose Custom from the Luma/Chroma Mode pop-up menu.
RGB Limiting Controls
 Enable: Select or deselect the checkbox to enable or disable the Max. RGB Output
Level parameter. When this parameter is enabled, any equivalent RGB values that
exceed the Max. RGB Output Level parameter value are clamped to that value.
Negative RGB values are automatically clamped to zero.
Note: Unlike the Custom Luminance Limiting and Custom Saturation Limiting
controls, this option can always be enabled, regardless of the option currently
selected in the Luma/Chroma Mode pop-up menu.
 Max. RGB Output Level: This parameter value is the maximum RGB-equivalent value
that the filter outputs.
The Max. RGB Output Level slider goes between 75 and 125; 100 is the default
setting. If you want to reduce RGB levels, set the slider to a value below 100. If you
want the filter to tolerate higher RGB levels, set the slider to a value above 100.
For more detailed control, you can use the RGB Limit filter instead (see “