DRMradio

 

 

SDC

 

The SDC contains information about the services available and how  to decode the MSC. SDC is transmitted at the beginning of each ‘super-frame’ every 1.2 seconds. Primarily intended to give the listener information about the tuned DRM radio station, similar in operation to VHF-RDS. Includes the radio station name (up to 16 characters), alternate frequency and schedule information, target coverage area, time and date.

 

The SDC uses either 16-QAM or 4-QAM mapping. 16-QAM provides greater capacity whereas 4-QAM provides a more robust error performance. SDC is transmitted with a fixed code rate.

 

There are 13 different SDC data entities defined -

 

multiplex description data entity - type 0

service label data entity - type 1

conditional access parameters data entity - type 2

frequency information data entity - type 3

frequency schedule data entity - type 4

application information data entity - type 5

announcement support and switching entity - type 6

region definition data entity - type 7

time and date information data entity - type 8

audio information data entity - type 9

FAC channel parameters data entity - type 10

linkage data entity - type 11

language and country data entity - type 12

 

 

 

 

Service Descriptor Channel