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Digital Audio Broadcasting

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ALSO CALLED: Digital Audio Broadcasting Services, Digital Radio Services, DAB, Digital Radio, Direct Broadcast Radio Systems
DEFINITION: Digital audio broadcasting (DAB), also known as digital radio and high-definition radio, is audiobroadcasting in which analogaudio is converted into a digitalsignal and transmitted on an assigned channel in the AM or (more usually) FM frequency range. DABis said to offer compact disc (CD)- quality audio on the FM (frequency modulation) broadcast bandand to offer FM-quality audio on the AM (amplitude  … 
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DIGITAL AUDIO BROADCASTING DEFINITION (continued): …  modulation) broadcast band. The technology wasfirst deployed in the United Kingdom in 1995, and has become common throughout Europe.Digital audio broadcast signals are transmitted in-band, on-channel (IBOC). Several stations canbe carried within the same frequency spectrum. Listeners must have a receiver equipped to handleDAB signals. At the transmitting site, the signal is compressed using MPEGalgorithms and modulated using coded orthogonal frequency division multiplexing (COFDM). Adigital signal offers several advantages over conventional analog transmission, including improvedsound quality, … 
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