EDID Basics

EDID is an acronym for Extended Display Information Data.  EDID was originally implemented by computer monitors with DVI inputs to present its display capabilities to a video card so a compatible video resolution could be ouput  to the attached monitor. EDID is also used by HD Displays via HDMI to identify the HDTV display and audio capabilities to consumer video sources.

EDID is programmed by Display manufactures to specify model , manufacturing date and the Display capabilities such as resolution support, and audio capability. A rudimentary example of a EDID is shown below:

EDID from Samsung LED TV

The Raw EDID shown is read by the source player and is interpreted as: ” I am a Samsung LED tv, I am capable of displaying 3D video and 1080P video resolution. My audio capabilities are 2 ch PCM only .” Once the EDID is read by the video source, the video source can be configured so the source will not send video or audio that exceeds the capability of the attached display.

EDID typically include 256 byte of data and stored in a PROM inside the display and communicates to the the video source via I2C bus. One can use a EDID reader such as Monitor Asset Manager from ENTECH to view a display’s EDID.

More info at: www.octavainc.com





Octava HD41-ARC at Liberty Science Center

Octava HD41-ARC HDMI Switch installed by Liberty Science Center.
Dedicated to bringing the excitement of science to people of all ages, Liberty Science Center houses seven museum exhibition halls, a 3D theater, the nation’s largest IMAX Dome Theater, live simulcast surgeries, tornado and hurricane-force wind simulators, K-12 classrooms and labs, and teacher-development programs. 600,000 students, teachers, and parents visit the science center each year, and tens of thousands more benefit from the center’s off-site and online programs.


More info at : www.octavainc.com


HDMI Switch with Digital Optical audio Enables Simple Audio Integration with non -HDMI AV Amp

Octava Inc,solutions provider for HD digital video connectivity  has introduced the HD41-ARC HDMI switch for integration of audio video with new ARC enabled Displays and legacy non-HDMI AV amps.

In response to customers for a solution for integrating with legacy non-HDMI AV Amps, the HD41-ARC provides : HDMI to optical audio conversion, direct Optical audio switching, and HDMI ARC to optical audio conversion to enable owners of new ARC enabled displays to listen to the TV’s inbuilt  Web/IP applications  or Freeview tuner via their AV Receiver using an Optical connection between the HD41-ARC HDMI Switch and the  legacy non-HDMI AV Amp. The optical audio ouput can be independently switched, so users can view HD video and listen to an alternative audio stream via Optical input.

In addition, the HD41-ARC is fully 1RU rack mountable and includes RS-232 serial control port for professional/commercial application.


  • HDMI inputs x 4
  • Optical Toslink  Audio inputs x 4
  • Optical Toslink  Audio output  x 1
  • HDMI output with ARC support x 1
  • 1 RU rack mountable
  • IR jack for use with an IR Extender head
  • RS-232 serial port for control system integration

More info at: www.octavainc.com




Simple Infrared IR Remote Control testing with a Digital Camera

Remote controls are ubiquitous and are reliable method for controlling Audio video equipment.  However some common problems encountered with remote controls are:1) low battery levels 2)  remote code  has been “reset” or deleted  and 3) IR diode in remote damaged. This article will provide a simple troubleshooting method to find the cause of the problem.

Vast majority of remote controls for consumer grade Audio Video equipment use IR. IR remote controls transmit IR via a diode in the 940nm wavelength. IR spectrum is above the visible light spectrum, therefore IR can not be seen by the naked eye. However the CCD detectors in most digital cameras or smartphones are sensitive to IR and can be used to determine if a remote control is operational.

Using Digital Camera to test IR of Remote Controls:

  1. Set your digital camera or smartphone to view mode
  2. Point the front of the Remote Control at the camera lens
  3. Press and hold down  a button on the remote. You will see a blue light on the camera view screen if the remote control IR diode is operating.


  • No IR is detected by camera: change battery on the remote. If changing battery does not solve it, then the remote control is damaged.
  • IR is detected by camera: If you are using a Universal /multi-device remote, most likely your programmed codes has been “reset”. Try re-programming the device codes to the remote control.

More info can be found at : www.octavainc.com



Octava-HDMI Extender over single Cat 6 cable extends:HDMI,IR, Serial Data and Ethernet 300ft.

Octava Inc., specialists in HD video distribution updated the HDMI Extender HDCATS-100.  The HDCATS-100 combines and extends 4 signal formats over 1 single CAT5/6 LAN cable up to 300ft: 1)1080P HD digital video/audio 2) Infrared I.R.  3) Serial Data (RS-232) and 4) Ethernet. The HDCATS-100 supports 4k x 2k resolutions.

The HDCATS-100 enables pre-existing CAT5e/6/7 LAN cable infrastructure to distribute HD video / audio, IR, serial data, and Ethernet. The HDCATS-100 is ideal for pre-wired systems requiring HD video distribution- no new wiring required.  In addition, Ethernet cables and connectors are easily field terminated thus allowing installers to easily install the proper length cable needed for ultimate flexibility and eliminate logistics problems of having custom length video cables.

HDMI Extender HDCATS-100 over Cat 6 cable
HDMI Extender, Octava-HDCATS-100

“Octava has been innovating products for HD video distribution with the end user in mind. The HDCATS-100 enables installers to easily distribute uncompressed HD video along with Ethernet over a single CAT5e/6/7 cable .This obviously enables custom installers to leverage the investment of pre-installed cable infrastructure already in place .  The Octava HDCATS-100  transports uncompressed video to ensure highest video fidelity.” explained Jeffrey Su, Product Manager at Octava.

The Octava HDCATS-100 specifically designed for long cable runs to HD displays where HD video and data is required such as:
•    Information Kiosks
•    Movie theater
•    Education / training centers
•    Sporting events, gyms, bowling alleys
•    Meeting rooms
•    Casinos, transportation, and logistics centers
The HDCATS-100 HDMI Extender over CAT5e/6allows transmission of HDMI, 100baseT Ethernet ,Serial data ( RS-232) and IR over 1 single Cat5e/6/7 cable. The HDCATS-100 HDMI Extender consists of a HDMI Transmitter and  Receiver. Infrared Extension allows I.R. signals to be sent from viewing area to the equipment room. The RS-232 and IR are bi-directional allowing users to select the desired control direction.

More info can be found at : www.octavainc.com

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