18
Video Composition Operations
Luminance Key
This takes video in which white or black areas are made transparent,
and composite it overlaid on a background picture.
Black or White
Chroma Key
This composites video shot against a blue or green background onto
a different background video.
Blue or Green
Setting the key type and extraction color
To change the key type and extraction color to match the video you
want to composite.
1 .
COMPOSITION
Select the [MENU] button
&
“Composition”
&
“Key1,” and press the [VALUE] knob.
DSK
Select the [MENU] button
&
“DSK”
&
“Key2,” and
press the [VALUE] knob.
2 .
Select “Type,” and use the [VALUE] knob to specify the
key type (extraction color) to use when compositing.
Value
Explanation
Luminance White
This uses a brightness threshold to make white
transparent.
Luminance Black
This uses a brightness threshold to make black
transparent.
Chroma Blue
This uses a color threshold to make blue transparent.
Chroma Green
This uses a color threshold to make green transparent.
Chroma Manual
This uses a color threshold to make manual color
transparent.
3 .
Press the [MENU] button to quit the menu.
Compositing using key
1 .
Press a cross-point [1]–[8] button in the PGM
section to select the video you want to make the
inset screen.
2 .
Press the MODE [AUX/COMPOSITION] button or [DSK]
button to select the send-destination for the video.
3 .
Press a cross-point [1]–[8] button in the AUX/
COMPOSITION - DSK section to select the video to
overlay.
4 .
According to the button that you pressed in step
2, press one of the following buttons to turn key
compositing on (lit).
If you pressed the [AUX/COMPOSITION] button
Press the COMPOSITION KEY1 [KEY ON] button.
If you pressed the [DSK] button
Press the DSK KEY2 [KEY ON] button.
The KEY1 [KEY ON] or KEY2 [KEY ON] button lights up in green,
and a preview of the composition results is displayed in the PVW
section of the multi-view monitor.
At this stage, the final output has not yet been changed.
Compositing Using Luminance Key/Chroma Key
This makes a portion of the video transparent and composites it onto a background video.
