Grass Valley 1200 Operation Manual - Manual (Page 94)

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Section 3 — Controls & Menus
Chroma Key Edge Menu
From the Chroma Key top menu, press [KEY EDGE>] to display the
Chroma Key Edge menu shown in Figure 3-20.
Chroma Key Edge Menu Functions:
[KEY SOURCE] —Selects a 4:2:2 resolution chroma key signal from
the KEY bus or a 4:4:4 dual link source, such as a telecine output.
[V EDGE PROC] —When ON, this feature enables vertical processing
of the chroma key and adds a frame of delay to the chroma key
path. This allows you to adjust the size of the key along the top
and bottom edges. The TEMPORAL selection averages two frames
together to reduce noise in the edge. When OFF, all vertical edge
processing is turned off, including the frame of delay. Note that
the frame of delay may cause problems for some applications,
such as recording on a VTR in write-after-read mode; turn edge
processing OFF to turn off the delay.
[KEY SIZE] —Enables adjustment of horizontal and/or vertical key
size using the (KEY SIZE) soft knob. [V EDGE PROC] must also be ON
to allow vertical key sizing. When OFF, key size is unity.
(KEY SIZE) —Adjusts size of the key in the horizontal and/or
vertical dimension when enabled by the [KEY SIZE] button.
[KEY SOFTNESS] —Enables softness adjustment of the horizontal
and vertical key edges. When OFF, H and V softness are zero.
(KEY SOFTNESS) —Adjusts horizontal or vertical key edge
softness when enabled by the [KEY SOFTNESS] button.
[KEY POSITION] —Enables adjustment of the key position.
(KEY POSITION) —Adjusts horizontal or vertical key position
when enabled by the [KEY POSITION] button.