Transport of NCL Applications over the Digital Radio Mondiale Broadcasting System for Ginga-enabled receivers: Signaling and Definitions

ISDB-T International standard is currently adopted by most Latin America countries and is already installed in most TV sets sold in recent years in the region. To support interactive applications in Digital TV receivers, ISDBT defines the middleware Ginga and its declarative language NCL (Nested Context Language). Similar to Digital TV, Digital Radio standards also provide the means to carry interactive applications; however, their specifications for interactive applications are usually more restricted than the ones used in Digital TV. Also, interactive applications for Digital TV and Digital Radio are usually incompatible. Motivated by such observations, this report considers the importance of interactive applications for both TV and Radio Broadcasting and the advantages of using the same middleware and language specification for Digital TV and Radio. More specifically, it establishes the signaling and definitions on how to transport and execute NCL (Nested Context Language) applications over DRM (Digital Radio Mondiale) transmission. Brazil is carrying trials with Digital Radio Mondiale standard in order to evaluate the best system to be used as reference for the Brazilian Digital Radio System.