Pa
e 3
U.S. RBDS Standard - A
ril 1998
CONTENTS
0 Scope .................................................................................... 6
1 Modulation characteristics of the data channel (physical layer) ...................................... 6
1.1 Subcarrier frequency ................................................................ 6
1.2 Subcarrier phase ................................................................... 6
1.3 Subcarrier level .................................................................... 8
1.4 Method of modulation .............................................................. 8
1.5 Clock-frequency and data-rate ....................................................... 8
1.6 Differential coding ................................................................ 8
1.7 Data-channel spectrum shaping ....................................................... 9
2 Baseband coding (data-link layer) ............................................................ 12
2.1 Baseband coding structure ......................................................... 12
2.2 Order of bit transmission .......................................................... 12
2.3 Error protection ................................................................. 13
2.4 Synchronization of blocks and groups ................................................ 14
3 Message format (session and presentation layers) ................................................ 15
3.1 Addressing ..................................................................... 15
3.1.1 Design principles ....................................................... 15
3.1.2 Principal features ....................................................... 15
3.1.3 Group types ........................................................... 17
3.1.4 Open data channel / Applications Identification ................................ 19
3.1.4.1 Use of Open data applications ....................................... 19
3.1.4.2 Open data applications - Group structure .............................. 20
3.1.5 Coding of the Group types ................................................ 21
3.1.5.1 Type 0 groups: Basic tuning and switching information .................. 21
3.1.5.2 Type 1 groups: Program-item number and slow labeling codes ............ 23
3.1.5.3 Type 2 groups: Radiotext ........................................ 25
3.1.5.4 Type 3A groups: Applications Identification for Open Data ............. 27
3.1.5.5 Type 3B groups: Open data application ............................. 28
3.1.5.6 Type 4A groups: Clock-time and date .............................. 28
3.1.5.7 Type 4B groups: Open data application .............................. 29
3.1.5.8 Type 5 groups : Transparent data channels or ODA ..................... 29
3.1.5.9 Type 6 groups : In house applications or ODA ......................... 30
3.1.5.10 Type 7A groups: Radio paging or ODA .............................. 31
3.1.5.11 Type 7B groups : Open data application ............................. 31
3.1.5.12 Type 8 groups: Traffic Message Channel or ODA ...................... 32
3.1.5.13 Type 9 groups: Emergency warning systems or ODA ................... 33
3.1.5.14 Type 10 groups: Program Type Name (Group type 10A) and Open data
(Group type 10B) .................................................... 34
3.1.5.15 Type 11 groups: Open data application ............................. 35
3.1.5.16 Type 12 groups: Open data application .............................. 36
3.1.5.17 Type 13A groups: Enhanced Radio paging or ODA ..................... 36
3.1.5.18 Type 13B groups : Open data application ............................ 37
3.1.5.19 Type 14 groups: Enhanced Other Networks information ................. 38
3.1.5.20 Type 15A groups ................................................ 39
3.1.5.21 Type 15B groups: Fast tuning and switching information ................ 40
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