User Manual

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DS Keyer Screen The KONA LHe Plus has a hardware-based downstream keyer that is ideal for putting logos,
“bugs” or other video material with an alpha channel on top of video being played out or
printed to tape. A typical application would be putting a television station's call letters or
channel over program video content. Keyed video can be from the KONA's internal Frame
Buffer (from storage, video In, KONA TV, etc.) or from a graphics file that has an alpha channel
(PhotoShop etc.).
AJA Control Panel, DS Keyer Screen
DS Keyer Settings
Downstream Keyer Mode:
Downstream Keyer Off — when this pulldown menu item is selected the downstream
keyer will be turned off
Frame Buffer over Matte— places the keyed video with alpha channel currently in the
Frame Buffer over a fixed color matte determined by the “Matte Color” setting set
separately.
Frame Buffer over Video In—places the keyed video currently in the Frame Buffer over
the video input for playout or print-to-tape.
Matte Color: only available when the pulldown “Frame Buffer over Matte” or “Graphic
over Matte” are selected-pressing this button brings up a color selection dialog. The
dialog provides a variety of ways to select a matte color including a color wheel, color
picker (choose from a location anywhere on the computer screen), numeric sliders,
swatches, “crayons”, and spectrums. The matte chosen will be used as a video
background under the keyed video.
Foreground pre-multiplied (checkbox): use to avoid “matte lines” and improve the
appearance of the foreground (key) being composited over the background.
Audio Out:
Frame Buffer—select audio out to be routed from the contents of the Frame Buffer.
Audio In—select audio out to be routed from KONA’s currently selected input(s).