ABSTRACT
With the advent of the CD (compact disc) and higher-quality distribution channels for music, the need for radio broadcasting of digital audio with CD or CD-like quality arose. One immediate problem for enabling such radio broadcasting services was limited radio bandwidth. The CD format uses PCM, which requires a bit rate of about 1.3 Mb/s for stereo. Thus, for successful digital audio broadcasting, efficient high-quality audio compression was required. Since people listen to radio predominantly in cars and not so much at home, another requirement was reliable delivery to moving receivers in cars and on high-speed trains.
