AJA ROI DVI to SDI Mini-Converter - Manual (Page 4)

ROI Series Mini-Converter v1.7 4 www.aja.com
Chapter 1 – Introduction
Overview
AJA’s ROI family of scalers/scan converters allows exceptionally high quality
conversion of computer and video signals in a small Mini-Converter form factor.
The ROI models offer Region of Interest (ROI) support allowing DVI, HDMI, Display
Port, and SDI input signals to be scaled and converted to a SDI output. The ROI-
SDI model also provides a scaled HDMI output. With incredible image scaling,
extensive aspect ratio and frame rate conversion, ROI fulfills the need to scale
computer and video to a desired resolution, all in realtime, in a very portable and
easy to use package.
The four models of ROI Mini-Converters available are:
• ROI-DVI
• ROI-DP
• ROI-HDMI
• ROI-SDI
Video Processing
In default mode, the ROI-DVI, ROI-DP, and ROI-HDMI models automatically detect
the input signal format and convert it to the SDI (and HDMI, for the ROI-SDI)
output video format. Their respective DVI, DP and HDMI outputs pass the signal
through without any processing, maintaining the incoming signal aspect ratio.
For the ROI-SDI, the incoming signal is passed to the SDI Loop Through Output,
without any processing, maintaining the incoming signal aspect ratio. The
processed signal goes to both the HDMI output and the SDI output.
If the SDI output raster is larger than the input raster, unused area is filled with
matte color.
To realize the full power of ROI, however, you will need to use the supplied USB
cable and AJA’s Mini-Config application to select the desired output format and
perform a variety of region-of-interest and output display scaling operations.
Once configured, the ROI unit can run standalone.
Audio Handling
ROI-DVI, ROI-DP, ROI-HDMI
Analog audio from the host can be input via a standard 3.5mm audio cable and
mapped to the embedded SDI output stream. Alternatively, if the input is HDMI
or DP, its embedded audio can be the audio input. The ROI-DVI model can receive
both DVI and HDMI protocol input, and accepts audio if it is embedded in an
HDMI signal. However, the DVI protocol does not carry audio, so if the ROI-DVI is
receiving DVI input, only analog audio can be embedded to the output.
ROI-SDI
Digital audio embedded in the SDI input is carried through to both the SDI output
and the HDMI output. Analog audio can be output through the two analog RCA
Jacks (2 channels). Digital audio can be embedded through the SDI output as 24-
bit, 8 channel, and/or through the HDMI output as 24-bit, 2 channel or 8 channel.