Updated: Jan 2, 2019
Video over Fibre: The Future of Hi-Res Installs?
Sure, video over fibre isn’t new but there is little debate over how it has outpaced other technologies in providing great outcomes for complicated, 4K video installations.
In so many ways fibre beats the competition when it comes to overcoming the challenges of speed and distance. It is future-ready technology that will likely serve several generations to come.
Why video over fibre and not AV over IP?
Speed and distance are the great limitations when it comes to high resolution video. AV over IP solutions can solve some problems but only up to a point. While it remains a popular extender technology, IP is set to remain at its current speed of 10.2 Gbps at least for the foreseeable future.
As potential speeds increase, we will soon think of these speeds as the norm. We need a better solution today for 4K HDR video at 18 Gbps and soon for HDMI 2.1 data rates at 24 Gbps, 32 Gbps and 48 Gbps.
In our opinion, video over fibre could well become a strong challenger solution. Introduced into the market several decades ago, video over fibre now offers a range of solutions that solve the speed and distance problems.
These solutions include extender boxes, active optical cables (AOCs) and even optical adapters.
AOCs have also become very popular. These are typically “hybrid” cables with a combination of both optical fibres and copper wires inside a jacket.
This hybrid construction allows power and low-speed control signals to use copper wires, just like a standard cable, while the high-speed signals are transmitted optically on multiple separate fibres.
It should be noted that there are some challenges with AOC. Distance remains a concern because of the limitations of the copper wiring.
Changes in the field are not possible, as the hybrid construction requires that AOC be terminated in the factory.
WDM for Video over Fibre
Being able to cut AV cables to length in the field was one advantage held by IP-based solutions. Now beyond AOC, video over fibre has this capability as well. A technology called wavelength division multiplexing (WDM) combines multiple channels onto a single fibre.
They convert electrical HDMI, Display Port, or other protocols to light, and then move the video over distances (where IP-based protocols were challenged. The light is then converted back to electrical signals where an image is displayed.
With WDM, channels can stack on top of each other in a single fibre. Different wavelengths can be transmitted in both directions. Transmission speed is not negatively affected, so WDM lets you keep on stacking.
WDM is new to the AV market. Another advantage is that, with use of a single industry standard, it can be utilised exactly as copper cabling has been used to this day.
Video over Fibre is Future-Ready
While the above advantages in usability are significant, perhaps the biggest advantage is how, at least in terms of modern technology, video over fibre is set to stand up to the test of time.
Fibre infrastructure at the point of installation should last through several generations of hardware and other upgrades. Video over fibre is becoming the solution of choice for 4K HDR video, making it the future-ready choice for high-resolution installations.
You are working hard to bridge the gap between preparing for the future and making sure your clients’ needs are met today. Video over fibre is a great solution to making the new work with more legacy components.
Minding this gap should present fewer challenges and greater opportunity for your high-resolution installations.the future of hi-res installs.