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IEC 62106-2
Edition 2.0 2021-02
INTERNATIONAL
STANDARD
Radio data system (RDS) – VHF/FM sound broadcasting in the frequency range
from 64,0 MHz to 108,0 MHz –
Part 2: Message format: coding and definitions of RDS features
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IEC 62106-2
Edition 2.0 2021-02
INTERNATIONAL
STANDARD
Radio data system (RDS) – VHF/FM sound broadcasting in the frequency range
from 64,0 MHz to 108,0 MHz –
Part 2: Message format: coding and definitions of RDS features
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.160.40 ISBN 978-2-8322-9426-0
– 2 – IEC 62106-2:2021 © IEC 2021
CONTENTS
FOREWORD . 6
INTRODUCTION . 8
1 Scope . 9
2 Normative references . 9
3 Terms, definitions, abbreviated terms and conventions . 9
3.1 Terms and definitions . 9
3.2 Abbreviated terms . 9
3.3 Notation and conventions . 11
4 Message format . 11
4.1 Design principles . 11
4.2 Group structure . 12
4.2.1 Group type A structure . 12
4.2.2 Group type B structure . 13
4.2.3 Group type C structure . 13
4.2.4 RFT ODA pipe/channel . 14
4.3 Group type A and B usage . 15
4.4 Group type C usage . 16
4.4.1 Transmitting legacy data using data-streams 1, 2 and 3. 16
4.4.2 Transmitting group type C ODA data . 16
4.4.3 AID and channel number assignment for group type C ODAs. 17
5 Description of the RDS features. 18
5.1 Alternative Frequencies list (AFs) . 18
5.2 Clock Time and date (CT) . 18
5.3 Dynamic PTY Indicator (PTYI) using DI . 18
5.4 Extended Country Code (ECC) . 18
5.5 Enhanced Other Networks information (EON) . 18
5.6 Linkage information . 19
5.7 Open Data Applications (ODAs) . 19
5.8 Programme Identification (PI). 19
5.9 Programme Service name – (PS) . 20
5.10 Long Programme Service name – (LPS) . 20
5.11 Programme Type (PTY) . 20
5.12 Programme Type Name (PTYN) . 20
5.13 RadioText (RT) . 21
5.14 enhanced RadioText (eRT) . 21
5.15 RadioText Plus (RT+ and eRT+) . 21
5.16 Traffic Programme identification (TP) . 21
5.17 Traffic Announcement identification (TA) . 21
5.18 Traffic Message Channel (TMC) . 22
6 Coding of the group types . 22
6.1 Groups of type 0A and 0B: Basic tuning and switching information with PS
name . 22
6.2 Group type 1A: Slow labelling codes . 23
6.3 Group type 2A and 2B: RadioText . 24
6.4 Group type 3A: Application identification for any specific ODA using groups
of type A or B . 25
6.5 Group type 4A: Clock-Time and date. 25
6.6 Group type 10A: Programme Type Name PTYN . 26
6.7 Group type 14A and B: Enhanced Other Networks information (EON) . 27
6.8 Group type 15A: Long Programme Service name – 32 bytes with UTF-8
coding . 27
6.9 Group type 15B: Fast basic tuning and switching information . 28
7 Coding of RDS features for control . 29
7.1 Programme Identification (PI) codes and Extended Country Codes (ECC) . 29
7.1.1 PI structure . 29
7.1.2 Country Identifier (CI) codes: 'Nibble 1' . 29
7.1.3 Extended Country Codes (ECC) . 29
7.1.4 Programme service in terms of area coverage (codes for fixed location
transmitters only): 'Nibble 2' . 30
7.1.5 Programme reference number: 'Nibbles 3 and 4' . 30
7.1.6 PI codes for low-power short range transmitting devices . 30
7.2 Programme Type (PTY) codes . 31
7.3 Traffic Programme (TP) and Traffic Announcement (TA) codes . 31
7.4 Decoder Identification (DI) and dynamic PTY Indicator (PTYI) codes . 31
7.5 Coding of Alternative Frequencies (AFs) . 32
7.5.1 AF code tables . 32
7.5.2 Use of Alternative Frequencies in group type 0A. 34
7.5.3 Use of AF codes in group type 14A . 36
7.6 Coding of Enhanced Other Networks information (EON) . 37
7.6.1 General . 37
7.6.2 Coding of frequencies for cross-referenced programme services in EON . 38
7.6.3 Use of the TP and TA features with EON . 38
7.6.4 Use of PTY with EON . 38
8 Required main RDS feature repetition rates on data-stream 0 . 39
Annex A (normative) Method for linking RDS programme services – Linkage
information – Group type 1A and 14A . 44
A.1 General . 44
A.2 LA – Linkage Actuator . 45
A.3 EG – Extended Generic indicator . 45
A.4 ILS – International Linkage Set indicator . 45
A.5 LSN – Linkage Set Number . 45
Annex B (informative) Conversion between time and date conventions . 47
Annex C (normative) RDS2 File Transfer protocol RFT for files up to 163 kB . 49
C.1 Group coding of the ODA-AID assignment groups . 49
C.1.1 General principles . 49
C.1.2 Variant 0 . 49
C.1.3 Variant 1 . 50
C.1.4 Variants 2 to 15 . 51
C.2 Coding of the RFT data group used to carry the file data bytes . 51
Annex D (informative) CRC-16 ITU-T/CCITT checkword calculation . 53
D.1 General . 53
D.2 PASCAL listing of CRC-16-calculation routine . 53
D.3 C listing of the CRC-16 calculation routine . 53
D.4 Fictitious example . 54
Bibliography . 55
– 4 – IEC 62106-2:2021 © IEC 2021
Figure 1 – Group type A structure . 12
Figure 2 – Group type B structure . 13
Figure 3 – Group type C structure . 13
Figure 4 – Tunnelling structure for group types A and B . 16
Figure 5 – Basic tuning and switching information – Group type 0A . 22
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