Datavideo SE-4000 8-Channel 4K Video Switcher - Manual (Page 53)

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5.2 Keyer
Keyer of the SE-4000 provides the user with the capability of image keying. In this sub menu,
the user will be able to configure the eight keyers available on the SE-4000.
Keyer
The 6 keyer options are Key 1, Key 2, Key 3, Key 4, DSK 1, and DSK 2.
Key 1 – 4 are usually configured for luma and chroma keyers so select Self since only one
source is enabled for such keyers.
The DSK keyer options are Linear and Luma. After the DSK keyer option is chosen, select Self
if only one source is enabled for DSK keyer, which is the Key source. Select Split if two
sources are enabled for the DSK keyer, which are Fill and Key sources. An example of a
Linear DSK self setup could be using an HDMI input from a Windows laptop running
Datavideo’s CG-250 Character Generator software; see
Character Generator for more
information.
Once configured, the keyers can be activated by pressing the corresponding keyer buttons
on the switcher’s control panel.
Select Fine if you require high keying quality and Normal for original keying quality.
Keyer Control
There are three keying modes available: Linear, Luma, and Chroma.
Linear keying mode is usually chosen for sharp images as it is usually used in professional
graphic design. For non-sharp images, please select Luma keying for basic text images.
Chroma keying mode allows you to remove the green or blue backdrop from the image and
is usually used in overlapping talent on a background image.