OG-ROI Series openGear card v1.6 4
www.aja.com
Chapter 1 – Introduction
Overview
AJA’s OG-ROI family of scalers/scan converters provide exceptionally high quality
conversion of computer and video signals in an openGear form factor. The OG-
ROI models offer Region of Interest (ROI) support allowing DVI and HDMI input
signals to be scaled and converted to a SDI output. With incredible image scaling,
extensive aspect ratio and frame rate conversion, OG-ROI fulfills the need to scale
computer and video to a desired resolution, all in realtime.
The two models of OG-ROI openGear cards available are:
• OG-ROI-DVI
• OG-ROI-HDMI
Designed for use in high-density openGear 2RU frames, including AJA’s OG-X-
FR 2RU frame, the OG-ROI Series is capable of communicating with Ross Video’s
DashBoard Control System. DashBoard runs on Windows®, macOS®, and Linux®,
providing convenient, industry-standard configuration, monitoring and control of
the openGear architecture over a PC or local network.
Video Processing
In default mode, the OG-ROI-DVI and OG-ROI-HDMI models automatically detect
the input signal format and convert it to the SDI output video format. Their
respective DVI and HDMI outputs pass the signal through without any processing,
maintaining the incoming signal aspect ratio.
In Auto mode, if there is a difference in aspect ratio relative to the input and
output format, the unused area is filled with a user-configurable matte color. For
example, a 720p input will matte with a 625i output and vice versa. However, a
720p input will not matte with a 1080p output.
Audio Handling
Analog audio from the host can be input via 3-pin analog audio connectors
and mapped to the embedded SDI output stream. Alternatively, when an HDMI
input signal is present, the HDMI input's embedded audio can be mapped to the
embedded SDI output stream.
