Io 4K Plus Capture, Display, Convert v14.0r2 40 www.aja.com
DS Keyer Screen
The Io 4K 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.
NOTE: The Io 4K Plus does not support Downstream Keying in UltraHD and 4K formats.
A typical application would be putting a television station’s call letters or channel
over program video content. Keyed video can be from the Io 4K Plus internal
Frame Buffer (from storage, video In, etc.) or from a graphics file that has an alpha
channel (Photoshop etc.).
Settings in the DS Keyer Screen provide control over how the keyer operates and
whether it’s turned on or off.