06.27.2008 12:00 AM
Philips Demonstrates HDTV Over White Space
Philips Electronics says it has demonstrated to the FCC a “fully operational white space broadband system” that senses and avoids incumbent users, all while transmitting an HDTV signal over an empty channel.
In a filing describing a June 23 meeting with FCC Commissioner Michael J. Copps and his legal adviser, Philips said it also demonstrated that its technology could detect a newly introduced incumbent wireless mic signal and seamlessly switch to a new open channel without interrupting the HDTV transmission.
Philips said the technology could help create home networks that allow wireless HDTV transmission among rooms as well as linking together devices such as telephones and even HVAC systems.
The company said its system constantly scans and senses UHF spectrum for used channels, and also features “cognitive operation” in which all network nodes jump to another available white space channel should an incumbent user begin transmissions on a channel being used.
Broadcaster have opposed the use of such unlicensed consumer devices in white spaces, saying that the interference-mitigation plans proposed by electronics companies fail to guarantee that DTV signals and wireless mic users be able to operate without interference.