HD Radio

(from the article `Media and Publishing`) Some stations experimented with less-rigid music formats, and others took advantage of technology for digital radio broadcasting. In the United ...
Found on http://www.britannica.com/eb/a-z/h/27

HD Radio

HD Radio is the trademark for iBiquity`s in-band on-channel (IBOC) digital radio technology used by AM and FM radio stations to transmit audio and data by using a digital signal embedded “on-frequency” immediately above and below a station`s standard analog signal, providing the means to listen to the same program in either HD (digital radio.....
Found on http://en.wikipedia.org/wiki/HD_Radio
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