AM Signalling System (AMSS) er et åbent AM-radiokanals signaleringssystem. Formålet med denne kanal er at bibringe radioforsatsen med alternative AM- og DRM-frekvenskanaler, så radioforsatsen automatisk kan skifte til den bedste kanal med samme indhold. AMSS kan både anvendes på en sædvanlig AM-radiokanal og på en Digital Radio Mondiale-kanal primært på langbølgebåndet, mellembølgebåndet og kortbølgebåndet.
AMSS er en digital kanal, der er fasemoduleret ind i AM-bærebølgen uden at AM-signalet bliver forvrænget. AMSS-kanalen sender med ca. 47 bit/sekund.
- Populær og teknisk: BBC Research & Development, UK: The AM Signalling System AMSS – Does your radio know what it's listening to? (pdf) Citat: "...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..."
- BBC: Global value (pdf, papirside 56)
- Teknisk: ETSI: Digital Radio Mondiale (DRM); AM signalling system (AMSS) Citat: "... The present document defines a system for adding a limited amount of service information to analogue broadcasts in the frequency bands below 30MHz in a complementary way to the Digital Radio Mondiale (DRM) system. It is intended to be used by broadcasters in the transition to all digital transmission by providing labelling and frequency information for a better user experience...Supporting Organizations...BBC, Fraunhofer, Sony, Bosch..."
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