AJA Video Systems ROI-HDMI Mini Converter

HDMI to SDI with Region of Interest Scaling

AJA’s ROI-HDMI Mini-Converter allows exceptionally high quality conversion of computer and HDMI outputs to baseband video over SDI at an affordable price and a very portable size. With extensive audio functionality, incredible image scaling as well as aspect and frame rate conversion, ROI-HDMI fulfills the growing need to properly incorporate computer signals into the video world without sacrificing budget or space.

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AJA’s ROI-HDMI Mini Converter allows a computer based user operating with an HDMI output as a video source to select a region of interest and scale the output to fit a working resolution. This makes it straightforward to broadcast segments of a computer monitor without the assorted detritus of on-screen workspace menus.

Extra interface clutter and menu bars can be eliminated to focus on a single part of the screen. However, the mini converter retains top quality video characteristics because cropping and scaling is carried out by integrated hardware.

The HDMI loop and SDI output both receive embedded audio and it’s possible to also embed analog stereo audio into the video output thanks to a 3.5mm jack. The converter accepts 2-channel audio from this jack or embedded 8-channel from an HDMI input.

The AJA ROI’s Mini-Config software allows audio source and routing customisation and is embedded in the SDI output; meaning computer audio can be embedded within the SDI signal or simple synchronised routing.

  • DisplayPort to SDI conversion
  • Region of Interest scaling
  • HDMI loop through
  • Audio embedding
  • Aspect ratio conversion
  • Genlock input
  • Configure via USB port and supplied Mini-Config software
  • Uses 5-18VDC power (universal power supply included)
  • 5-year warranty
More Information

Video Input Formats

  • Computer Signals:

  • WUXGA (1920 x 1200) 60 Hz max

  • VGA (640 x 480) minimum

    Note: Frame rates limited by the 166 mHz max pixel rate of the HDMI receiver.

  • Video Signals:

  • (HD) 1920 x 1080i 25, 29.97

  • (HD) 1920 x 1080p 23.98, 24, 25, 29.97, 30, 50, 59.94, 60

  • (HD) 1280 x 720p 23.98, 24, 25, 29.97, 30, 50, 59.94, 60

  • (SD) 625i, 525i

  • (SD) 580p, 480p


Video Output Formats

  • (HD) 1080p 50, 59.94, 60 - SMPTE 425-1 Level A mapping structure 1 (4:2:2 10-bit YCbCr)
  • (HD) 1080p 23.98, 24, 25, 29.97, 30
  • (HD) 1080i 25, 29.97
  • (HD) 720p 50, 59.94, 60
  • (SD) 625i 25
  • (SD) 525i 29.97


Color Range

  • Full


Reference Input

  • Supported reference video inputs include:

  • 1080i tri-level sync

  • 1080p tri-level sync

  • 720p tri-level sync

  • PAL 625 bi-level sync

  • NTSC 525 bi-level sync


Video Input

  • 1 x HDMI input connector (with embedded audio, up to 8 channels)


Video Outputs

  • HDMI

  • 1 x HDMI loop through connector (with embedded audio, up to 8 channels)

  • SDI

  • 3G-SDI, SMPTE-259/292/424, 1 x BNC



  • ROI-HDMI does not encode the HDMI output with HDCP encryption
  • ROI-HDMI does not accept HDCP input


Audio Inputs

  • 1 x Analog 3.5mm TRS, 2-Channel
  • HDMI embedded audio, 24-bit, 8-Channel


Audio Output

  • SDI embedded audio, 24-bit, 2-Channel or 8-Channel


User Controls

  • USB port used with supplied cable and Mini-Config software application to configure device via Mac or Windows


Size (w x d x h)

  • 5.765" x 4.02" x 0.9" (146.431mm x 102.108mm x 22.86mm)



  • Uses AJA power supply model DWP-U-R1, included with purchase
  • 100-240V, 50/60 Hz Universal input
  • +5 to 20V DC regulated, 9 watts max



  • Safe Operating Temperature: 0 to 40 degrees C (32 to 104 degrees F)
  • Safe Storage Temperature (Power OFF): -40 to 60 degrees C (-40 to 140 degrees F)
  • Operating Relative Humidity: 10-90% noncondensing
  • Operating Altitude: <3,000 meters (<10,000 feet)