User Manual
Table Of Contents
- Installation & Operation Guide
- Trademarks
- Copyright
- Contacting Support
- Overview
- System Requirements
- What’s In The Box?
- In This Manual
- Installation Overview
- Connecting to your Computer
- Installing Io XT/4K Software
- Using Io XT/4K with Professional Video /Audio Software
- AJA Control Panel Overview
- Control Panel Operation
- Using Io 4K for UHD/4K
- If You Run Into Problems
- Updating Software
- Support
- Io XT Specifications
- Io 4K Specifications
- Machine Control
- Appendix B: Safety and Compliance
- Federal Communications Commission (FCC) Compliance Notices
- Canadian ICES Statement
- European Union and European Free Trade Association (EFTA) Regulatory Compliance
- Korean Compliance Statement
- Taiwan Compliance Statement
- Japanese Compliance Statement
- Translated caution statements, warning conventions and warning messages
- Before operating your AJA unit, read the instructions in this document
- Limited Warranty
- Limitation of Liability
Io XT/4K v10.5r2 www.aja.com
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DS Keyer Screen The Io XT and Io 4K have 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 does not support Downstream Keying in UHD 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 XT internal Frame Buffer (from
storage, video In, etc.) or from a graphics file that has an alpha channel (PhotoShop etc.).
Figure 38. AJA Control Panel, Downstream Keyer Screen
Settings in the DS Keyer Screen provide control over how the keyer operates and
whether it's turned on or off. Controls and their meanings in the screen are as follows:
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.
Graphic over Matte: Places a graphics file having an alpha channel (chosen in “Graphic File” pulldown) over a
fixed color matte determined by the “Matte Color” setting set separately.
Graphic over Video In: Places a graphics file having an alpha channel (chosen in “Graphic File” pulldown) over
the video input for playout or print-to-tape.
Graphic over Frame Buffer: Places a graphics file having an alpha channel (chosen in “Graphic File” pulldown) over
the current contents of the Io XT Frame Buffer (which might be from storage, video In,
etc.).