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Using a prepared PowerPoint Presentation, slides with a black background can be played into the DVK-200.
The black portion of these PowerPoint slides can then be Luma keyed out and replaced with Background
video. The Background Video could be live video from a camera/mixer, or pre-recorded footage from a DVD
Player or VTR.
The DVK-200 output connections could run to a DVD Recorder or HDD Recorder, but it could just as easily
be going to a distribution amplifier supplying a number of live screens, or a converter supplying a DV stream
to a PC or laptop for a live webcast.
Luma Key Settings
The Luma Key Settings for KEY-1 or KEY-2 will be set at opposite ends of the scale, on KEY-1 we want to
remove white and on KEY-2 we want to remove black. Let’s start with KEY-1.
Press the KEY-1 button on the front of the DVK-200, once pressed it should be
illuminated red.
Press the Chroma Key button and the Luma button, both should be illuminated red.
Luma Key has two modes and you will see if you press and hold the Luma button for
two seconds it flashes. If the button is constantly red it is in Mode 1, which is for
removing dark colours – If it is flashing it is in Mode 2, which is for removing light
colours. As Key-1 button will be working with a white background that we want to
remove, we need Luma Mode 2, so press and hold the Luma button until it is flashing.
Use the Adjustment Knob to adjust the Luma Keying level. You should see the effect on
the output monitor. Set the Luma Keying Level to eliminate as much of the white
background as possible.
You can also apply Luma Key Mode 1 to fine tune the overlay. This will start to key out the darker areas of
the overlay.
Press and hold in the Luma button for two seconds, until it stops flashing and is
illuminated constantly red.
Use the Adjustment Knob to adjust the Luma Keying level. You should see the effect on
the output monitor. The darker areas of the overlay will start to disappear. This is really
a fine tune adjustment, if you go too far everything will appear.
Now press the Density (Level) button.
The Chroma Key and Density buttons should both be illuminated red. When using Luma
Key, the Density button has two modes and you will see if you press and hold the
Density button for two seconds it flashes. If the button is constantly red it is in Mode 1,
which adjusts the density of dark colours – If it is flashing it is in Mode 2, which adjusts
the density of light colours. You can use both Modes 1 and 2 to fine tune the overlay
effect.