The Eureka 147 DAB system is based on the combination of two fundamental techniques i.e. bit-rate reduction coding of high-quality sound and digital broadcasting in the mobile radio channel. In an effort to meet the need to offer broadcasters new facilities for sound and data multiplexing and conditional access to services, the Eureka 147 consortium defined a complete digital broadcasting system with specifications drawn up in the form of an ETS which was adopted at the end of 1994. This paper presents the general principles of the DAB transmission system, with a special focus on the DAB transmission modes in relation with the Radio Frequency and network topology issues.
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