Digital Radio Mondiale, the Other IBOC

DRM, the Other IBOC. Amplitude modulation, the workhorse of LW, MW and SW broadcasting for nearly a century, has long been subjected to attempts to improve its performance using specialized analog techniques -- most of which have never quite met expectations. Even so, years of research and development in AM MW/SW digital transmission now promise to change perceptions about these narrow bandwidth radio broadcast mediums. The fruition of those efforts is manifested in two similar, yet distinctly different AM digital broadcast technologies: Ibiquty's AM HD Radio, designed primarily around the needs of U.S. broadcasters, and Digital Radio Mondiale's (DRM) systems multiple implementation approach. While the Ibiquity system has received most of the attention in the states, DRM has been building support worldwide as a replacement technology for both international and domestic broadcasters overseas. [Radio Magazine]