The AM Signalling System, AMSS -
does your radio know what it is listening to?
Andrew Murphy and Ranulph Poole

The AM Signalling System (AMSS) adds a small amount of digital information to existing analogue AM broadcasts on short, medium and long-wave, giving similar functionality to that provided by the Radio Data System (RDS) on the FM bands.

The system has been designed within the Digital Radio Mondiale (DRM) consortium, primarily to ease the
transition from analogue to digital broadcasting.

A suitably-equipped receiver will allow selection of the AM service by name as well as the choice of re-tuning to other frequencies carrying analogue or digital versions of the same or a related service.

Several AMSS transmissions are already on air and some, if not all, of the first consumer DRM receivers will incorporate AMSS decoding.

http://www.ebu.ch/en/technical/trev/trev_305-murphy.pdf (507 KB)