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A consortium of radio broadcast groups launched a traffic- and weather-data service over HD Radio to compete with HD Radio traffic service available through FM stations operated by broadcast group Clear Channel.
The Broadcaster Traffic Consortium (BTC), which uses Navteq traffic content, is currently broadcasting data over analog-FM Radio Data System (RDS) signals in 77 markets and over HD Radio in 63 markets. In the second quarter, the group expects to expand its traffic service to 82 RDS markets and 74 HD Radio markets.
BTC, whose membership just expanded to 16 broadcast groups from 12, began delivering Navteq content over RDS in September 2008.
Clear Channel, which also delivers traffic over RDS, began transmitting traffic data via HD Radio in 2007.
HD Radio traffic service refreshes information more frequently and includes more information than standard RDS-based traffic reports, HD Radio developer iBiquity Digital has said. The wider HD Radio pipe can deliver 500 incident reports to the device per minute compared to RDS, which can deliver only about 50 incidents per minute, iBiquity said.
For its part, Navteq pointed out that HD Radio offers up to 40 times greater capacity than such current technologies as RDS. Traffic-service transmission speeds are 0.3kbps for RDS radios and 12kbps for HD Radios. As a result, Navteq said, via HD Radio, “detailed graphics, imagery, sound and mobile coupons, not available using other distribution formats” can be transmitted to PNDs and installed navigation systems.
To date, only a Dual-brand PND receives traffic updates over HD Radio, but only from Clear Channel. PNDs are programmed at the factory to detect a digital code transmitted by HD Radio stations to identify a specific traffic service.
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