2.
Press the
SEL
button on the Effects Keyer
module for the key you want to split. This
assigns the module to that key.
3.
Press and hold the
AUTO SELECT
or
SELF
KEY
, depending on the key type you are
splitting.
4.
Select the source on the key bus for the
alpha you want to use.
Masks
A mask is a technique in which a pattern is
combined with the key source to block out
unwanted portions of the key source.
Three types of masks are available, box masks,
pattern masks, and utility bus masks. All key
types can be masked.
• Box Mask — uses a simple box shape to mask
out a portion of the key.
• Pattern Mask — uses a pattern from the
pattern generator to mask out a portion of
the key.
• Utility Bus Mask — uses a video source
selected on utility bus one to mask out a
portion of the key.
Keep the following in mind:
Keep the following in mind when working with
a mask:
• A mask can be applied to any type of key.
• A mask applied to a flying preset pattern key
is performed downstream (post) of the DVE.
This allows you to adjust the DVE key without
affecting the mask.
• A mask applied to a flying chroma key, self
key, or auto select key is performed upstream
(pre) of the DVE. This means that adjusting
the DVE key also adjusts the mask.
• A mask applied to a flying key that is using
the floating DVE is always performed
downstream of the DVE.
To Set Up a Box Mask
1.
Press
MASK
>
Box Mask
.
2.
Press
Posn/Size
and use the
X
,
Y
, and
Size
knobs, or the positioner, to adjust the
position and size of the mask.
•
X
— move the mask from side to side.
•
Y
— move the mask up and down.
•
Size
— adjust the size of the mask.
3.
Press
Top/Left
and use the
Top
and
Left
knobs to adjust the location of the top-left
corner of the mask.
•
Top
— move the top edge of the mask up
or down.
•
Left
— move the left edge of the mask
left or right.
4.
Press
Bottom/Right
and use the
Bottom
and
Right
knobs to adjust the location of
the bottom-right corner of the mask.
•
Bottom
— move the bottom edge of the
mask up or down.
•
Right
— move the right edge of the mask
left or right.
5.
Press
Force
to toggle it to
On
to force the
masked area of the image on screen.
6.
Press
Invert
to toggle it to
On
to reverse the
mask. The portion of the image that was
masked out is now visible, and the portion
that was visible is masked.
To Set Up a Pattern Mask
1.
Press
MASK
>
Pattern Mask
.
2.
Select the pattern you want to use to mask
out the key.
Tip:
For information on modifying the mask pattern, refer
to
on page 91.
3.
Press
Back
.
4.
Press
Force
to toggle it to
On
to force the
masked area of the image on screen.
5.
Press
Invert
to toggle it to
On
to reverse the
mask. The portion of the image that was
masked out is now visible, and the portion
that was visible is masked.
To Set Up a Utility Mask
1.
Press
MASK
>
Utility Bus Mask
.
2.
Use the
Utility Bus 1 Xpt
knob, or select the
source on the utility bus that you want to
use to mask out the key.
3.
Press
Force
to toggle it to
On
to force the
masked area of the image on screen.
4.
Press
Invert
to toggle it to
On
to reverse the
mask. The portion of the image that was
masked out is now visible, and the portion
that was visible is masked.
Ultrix Acuity Operation Manual (v10.1) — Key Modifiers • 51