2013 Hyundai Sonata Owner's Manual - Page 206

Features of your vehicle HD RADIOTM INFORMATION Licensing information What is HD RadioTM technology? The vehicle audio system (if equipped) is able to receive standard analog FM/AM radio broadcasting as well as digital HD RadioTM FM/AM broadcasting. HD RadioTM technology provides digital and analog reception using existing FM and AM broadcasting frequencies. Currently, radio stations broadcasting an HD RadioTM signal are operating in a hybrid mode of both, analog and digital, in order to reach both receivers. In both modes, analog and digital, the broadcasted program contents is the same(except of multicasting, see below). Eventually, as analog receivers are replaced by digital ones, radio stations may be able to turn off their analog broadcasting and use only digital broadcasting. HD RadioTM signal delay To overcome the delay that digital systems inherently produce, HD RadioTM technology first uses the audio signal of the analog broadcasting when you tune to an AM station or to the main channel of a FM station. After that, the system will blend from analog to digital signal. Normally, this blending is very smooth. If you experience a skip in program content of several seconds, the radio station has not implemented HD RadioTM broadcasting correctly. This is not a problem with your audio system. Due to the fact that sub channels are only broadcasting digital, blending from analog to digital signal is not possible if you tune to a sub channel. In this case playback of the sub channel starts after several seconds, this is a normal function. HD RadioTM Technology Manufactured Under License From iBiquity Digital Corporation. U.S. and Foreign Patents. HD RadioTM and the HD and HD Radio logos are proprietary trademarks of iBiquity Digital Corporation. Availability information HD Radio reception is available in the United States, including Alaska and Hawaii. TM Multicasting HD RadioTM FM stations are able to broadcast multiple digital program streams(channels) over a single FM frequency. For example, a HD RadioTM FM station can run a main channel of music and a sub channel of news(or even two different music channels) at one frequency. But only the program content of the main channel is broadcasted in analog. 4 125