IEC 62106:2015

IEC 62106 ®
Edition 3.0 2015-03
INTERNATIONAL
STANDARD
Specification of the radio data system (RDS) for VHF/FM sound broadcasting in
the frequency range from 87,5 MHz to 108,0 MHz

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IEC 62106 ®
Edition 3.0 2015-03
INTERNATIONAL
STANDARD
Specification of the radio data system (RDS) for VHF/FM sound broadcasting in

the frequency range from 87,5 MHz to 108,0 MHz

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.160.40 ISBN 978-2-8322-2544-8

– 2 – IEC 62106:2015 © IEC 2015

CONTENTS
FOREWORD. 9

INTRODUCTION . 11

1 Scope . 12

2 Normative references. 12

3 Abbreviations . 12

4 Modulation characteristics of the data channel (physical layer) . 13

4.1 General . 13

4.2 Subcarrier frequency . 14
4.3 Subcarrier phase . 15
4.4 Subcarrier level . 15
4.5 Method of modulation . 15
4.6 Clock-frequency and data-rate . 15
4.7 Differential coding . 16
4.8 Data-channel spectrum shaping . 16
5 Baseband coding (data-link layer) . 19
5.1 Baseband coding structure . 19
5.2 Order of bit transmission . 20
5.3 Error protection . 21
5.4 Synchronisation of blocks and groups . 21
6 Message format (session and presentation layers) . 22
6.1 Addressing . 22
6.1.1 Design principles . 22
6.1.2 Principal features . 22
6.1.3 Group types . 23
6.1.4 Open data channel/Applications Identification . 25
6.1.5 Coding of the group types . 27
6.2 Coding of information . 44
6.2.1 General . 44
6.2.2 Coding of information for control . 44
6.2.3 Coding and use of information for display . 54
6.2.4 Coding of clock time and date (CT) . 54
6.2.5 Coding of information for Transparent Data Channels (TDC) . 55

6.2.6 Coding of information for in house applications (IH) . 55
6.2.7 Coding of Radio Paging (RP) . 55
6.2.8 Coding of Emergency Warning Systems (EWS) . 56
7 Description of features . 57
7.1 Alternative frequencies list (AF) . 57
7.2 Clock Time and date (CT) . 57
7.3 Decoder Identification (DI) and dynamic PTY Indicator (PTYI) . 57
7.4 Extended Country Code (ECC) . 57
7.5 Enhanced Other Networks information (EON) . 57
7.6 Emergency Warning System (EWS) . 57
7.7 In House application (IH) . 57
7.8 Music Speech switch (MS) . 58
7.9 Open Data Applications (ODA) . 58
7.10 Programme Identification (PI) . 58

7.11 Programme Item Number (PIN) . 59

7.12 Programme Service name (PS) . 59

7.13 Programme Type (PTY) . 59

7.14 Programme Type Name (PTYN) . 59

7.15 Radio Paging (RP) . 59

7.16 RadioText (RT) . 59

7.17 Enhanced RadioText (eRT) . 59

7.18 RadioText Plus (RT+) . 60

7.19 Traffic Announcement identification (TA) . 60

7.20 Transparent Data Channels (TDC) . 60

7.21 Traffic Message Channel (TMC) . 60
7.22 Traffic Programme identification (TP) . 60
8 Marking . 60
Annex A (normative) Offset words to be used for group and block synchronisation . 62
Annex B (informative) Theory and implementation of the modified shortened cyclic
code . 63
B.1 General . 63
B.2 Encoding procedure . 63
B.2.1 Theory . 63
B.2.2 Shift-register implementation of the encoder . 65
B.3 Decoding procedure . 65
B.3.1 Theory . 65
B.3.2 Implementation of the decoder . 67
Annex C (informative) Implementation of group and block synchronisation using the
modified shortened cyclic code . 69
C.1 Theory . 69
C.1.1 Acquisition of group and block synchronisation . 69
C.1.2 Detection of loss of synchronisation . 69
C.2 Shift register arrangement for deriving group and block synchronisation
information . 69
Annex D (normative) Programme identification codes and extended country codes . 72
D.1 General . 72
D.2 PI structure . 72
D.3 Extended country codes . 72
D.4 Country codes: ‘Nibble 1’ . 73

D.5 Programme in terms of area coverage (codes for fixed location transmitters
only): ‘Nibble 2’ . 76
D.6 Programme reference number: ‘Nibbles 3 and 4’ . 76
D.7 PI codes for low-power short range transmitting devices . 77
Annex E (normative) Basic and extended RDS character sets . 78
Annex F (normative) Programme type codes . 98
Annex G (informative) Conversion between time and date conventions . 101
Annex H (informative) ARI (Autofahrer-Rundfunk-Information) system –
Discontinuation . 103
Annex J (normative) Language identification . 104
Annex K (informative) RDS logo . 106
Annex L (informative) Open data registration . 107
Annex M (normative) Coding of Radio Paging (RP) . 110

– 4 – IEC 62106:2015 © IEC 2015

M.1 General .
...