Sony MVS-8000X User Manual page 224

Video signal adjustment
You can vary the foreground signal gain, or change the hue. There are separate
adjustments for the gain of the overall video signal, and Y and C components.
Making auto chroma key adjustments
Auto chroma key is an automatic adjustment function which allows you to
specify a part of the foreground video (for example, the blue background color)
and use it as a reference for creating the chroma key image.
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Making key active adjustments
When the key active function is on, the composite image is output to the
monitor, and you can watch the monitor while manually adjusting the keying.
When the key active function is off, only the foreground image appears. Set
this off when manually adjusting color cancel (see the next section).
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Key Setting Operations Using Menus
In the M/E-1 >Key1 menu, select HF1 'Type,' then select [Chroma] in the
<Key Type> group.
Select [Chroma Adjust].
The Chroma Adjust menu appears.
Select [Sample Mark] in the <Auto> group.
The foreground video only appears on the monitor, with a white box-
shaped sample selector.
Adjust the position and size of the sample selector, to specify the color to
be used as the basis of chroma keying (typically a blue background).
Knob Parameter Adjustment
1 Position H Horizontal position
2 Position V Vertical position
3 Size Size
a) The setting ranges depend on the signal format, screen aspect ratio, and size settings.
Select [Auto Start] in the <Auto> group.
This executes an auto chroma key based on the color specified by the
sample selector, and displays the composite image on the monitor.
In the Chroma Adjust menu, set [Key Active] on.
Setting values
a)
–100.00 to +100.00
a)
–100.00 to +100.00
1.00 to 100.00