User's Manual

15
4.6 Chroma Key
Turn on the Chroma Key, a color from the key source will be removed, revealing another background
image behind it. Chroma Key is usually used for virtual studio, such as weather broadcasts, where the
meteorologist appears to be standing in front of a large map. In the studio the presenter is standing in
front of a blue or green background.
Switching a video with blue or green background to PVW window, and turn on the Chroma Key. Then go
to the Key menu to configure the value level of color gamut of the Chroma Key. And the KEY background
can be switch between Green and Blue. After finish the configuration, using CUT, AUTO, or T-Bar to
switch the image to overlay in the PGM window.
Main Menu
Secondary Menu
Option
Default
CHROMA KEY
KEY
ChromaKey
None
Background
Blue/Green
Blue
Level
0-64
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Exit
4.7 Luma Key
When turn on the Luma Key, all the black areas defined by the luminance in the video signal will be made
transparent so that the background can be revealed underneath. Therefore, the final composition does
not retain any black from the graphic because all the black parts have been cut out of the image. This
function is often used for subtitle overlay of virtual studio.
Switching a video with black background and white font subtitle to PVW and turn on the Luma Key. Using
CUT, AUTO, or T-Bar to switch the subtitle to overlay in the PGM window.