Harnessing Fiber Optics for Ultra-high-resolution Signage
Jun 10, 2008 12:00 PM, By John W. DeWitt
New digital signage and related AV technologies are harnessing more and more of the theoretically unlimited bandwidth of the fiber-optic transport medium. This gives application architects, integrators, and users the opportunity to power large, extremely high-resolution displaysincluding 1920x1200p HD progressiveusing limited or no compression. Notable examples, employing fiber-optic technology from Emcore, include FreshDirect’s 5850-square-foot outdoor Lighthouse LED display in New York City as well as numerous theaters, projectors, and digital signs deployed at the Freedom Forum’s interactive Newseum in Washington, D.C.
“With digital signage or any other sort of video communications taking place over distances, there’s more and more a need to move the signals over fiber-optic cable,” says Chris Larocca, vice president and general manager of Emcore’s broadband division. “Especially with high-definition and higher-bandwidth streaming video, you can only do so much over copper. And with the widespread deployment of fiber architecture, you have the infrastructure to deploy more content and bandwidth for HD applications.”
This infrastructure build-out, along with the dramatic increase in HD programming as we approach the 2009 analog shutoff, is precipitating the need for usage of optical technologies.
“Integrators and content creators are able to do more than five years ago because that fat pipe is out there,” Larocca says. Moreover, fiber’s cost is no longer a barrier. “Now the cost for laying fiber is identical to the cost of laying traditional copperit’s almost as cheap as fishing wire,” he says. "[In many cases] users are leasing fiber lines that are already installed. There was a huge fiber overbuild originally, so now it’s often simply a matter of utilizing that infrastructure.”
The FreshDirect outdoor digital displaylocated next to the Queens Midtown Tunnel in New York Cityexemplifies how signage applications can push the envelope of size, resolution, and visibility by employing fiber optics and optical transport platforms. The sign itself is a Lighthouse SuperScreen LED system that has laid claim to being the largest such display in the United States. The display produces more than 8,000 NITS, for full daylight visibility, and it is powered by an uncompressed SDI feed from FreshDirect’s headquarters in Long Island City, N.Y.
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