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Digital Radio Glossary
The data aspect of HD Radio includes lots of new terms and abbreviations. Here are some of the more common abbreviations and terms that you will likely encounter.
AAS Advanced Application Services
API Application Programming Interface
EOC Ensemble Operations Center
EPG electronic program guide
MPS Main Program Service
PAD program-associated data, See PSD.
PSD program service data; the updated name for PAD
QOS quality of service. Sometimes abbreviated QoS.
SAC Supplemental Audio Channel. See SPS.
SIS Station Information Service
SMIL Synchronized Media Integration Language
SPS Supplemental Program Service. Sometimes called SAC. In initial tests, NPR called this Tomorrow Radio.
telematics emerging technologies in automotive communications, combining wireless voice and data capability for management information and safety applications.
UDP User Datagram Protocol. UDP is a connectionless protocol that does not require the sender and receiver to establish a connection before data is transmitted.
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