ABSTRACT
This chapter explores the technologies employed, their significant features, costs, upgrade paths, propagation potential, energy consumption, increased programming options, and spectrum implications. It address the issues of receivers, station programming, areas of impact for each technology, and lastly the issue of "who benefits" by the transition to digital broadcasting. Digital radio generally employs one of four different modes: High Definition Radio, Digital Audio Broadcasting, Digital Radio Mondiale (DRM30 and DRM+), and China Digital Radio, although the distinction between radio and TV blurs at the transmission level as modes usually employed for digital TV can be used as well. To promote digital radio, the European Digital Radio Alliance was created in March 2016. In April 2016, the first European workshop, "Flexible and Complete Digital Radio for Europe" was held in Erlangen, Germany, hosted by Fraunhofer IIS. Digital radio is moving ahead for All India Radio with the move to 27 high powers, medium wave radio transmitters employing DRM30.
