IEC 62106:2009

Specification of the Radio Data System (RDS) for VHF/FM sound broadcasting in the frequency range from 87,5 MHz to 108,0 MHz

IEC 62106:2009(E) describes the Radio Data System, RDS, intended for application to VHF/FM sound broadcasts in the range 87,5 MHz to 108,0 MHz which may carry either stereophonic (pilot-tone system) or monophonic programmes. The main objectives of RDS are to enable improved functionality for FM receivers and to make them more user-friendly by using features such as Programme Identification, Programme Service name display and where applicable, automatic tuning for portable and car radios, in particular. The relevant basic tuning and switching information therefore has to be implemented by the type 0 group (see 6.1.5.1), and it is not optional unlike many of the other possible features in RDS. This edition constitutes a technical revision. The main changes with respect to the previous edition are:
- the list of RDS country codes, inclusive of the extended country codes, has been updated in Annexes D and N;
- Annex E, containing the character code tables to be used in RDS has been updated;
- RadioText Plus has been added as a new feature in Annex P;
- Enhanced RadioText has been added as a new feature in Annex Q. The contents of the corrigendum of May 2010 have been included in this copy.

General Information

• Status: Published
• Publication Date: 29-Jul-2009
• ICS: 33.060.20 - Receiving and transmitting equipment
• ICS: 33.170 - Television and radio broadcasting
• ICS: 35.240.99 - IT applications in other fields
• Technical Committee: TC 100 - Audio, video and multimedia systems and equipment
• Current Stage: DELPUB - Deleted Publication
• Completion Date: 30-Mar-2015

Standards Content (Sample)

IEC 62106
®
Edition 2.0 2009-07
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



IEC 62106:2009(E)

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IEC 62106
®
Edition 2.0 2009-07
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
PRICE CODE
XG
ICS 33.060.20; 33.170; 35.240.99 ISBN 978-2-88910-620-2
® Registered trademark of the International Electrotechnical Commission

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– 2 – 62106 © IEC:2009(E)
CONTENTS
FOREWORD.8
1 Scope.10
2 Normative references .10
3 Abbreviations and conventions .10
4 Modulation characteristics of the data channel (physical layer).11
4.1 General .11
4.2 Subcarrier frequency .11
4.3 Subcarrier phase.13
4.4 Subcarrier level .13
4.5 Method of modulation .13
4.6 Clock-frequency and data-rate .13
4.7 Differential coding .13
4.8 Data-channel spectrum shaping .14
5 Baseband coding (data-link layer) .17
5.1 Baseband coding structure .17
5.2 Order of bit transmission .17
5.3 Error protection .18
5.4 Synchronisation of blocks and groups .19
6 Message format (session and presentation layers) .19
6.1 Addressing .19
6.1.1 Design principles .19
6.1.2 Principal features .20
6.1.3 Group types.21
6.1.4 Open data channel/Applications Identification.23
6.1.5 Coding of the Group types .25
6.2 Coding of information .41
6.2.1 Coding of information for control.42
6.2.2 Coding and use of information for display .50
6.2.3 Coding of Clock Time and date (CT).51
6.2.4 Coding of information for Transparent Data Channels (TDC) .51
6.2.5 Coding of information for In House applications (IH) .51
6.2.6 Coding of Radio Paging (RP).51
6.2.7 Coding of Emergency Warning Systems (EWS) .52
7 Description of features .53
7.1 Alternative Frequencies list (AF).53
7.2 Clock Time and date (CT).53
7.3 Decoder Identification (DI) and dynamic PTY Indicator (PTYI).53
7.4 Extended Country Code (ECC).53
7.5 Enhanced Other Networks information (EON).53
7.6 Emergency Warning System (EWS).54
7.7 In House application (IH).54
7.8 Music Speech switch (MS) .54
7.9 Open Data Applications (ODA) .54
7.10 Programme Identification (PI) .54
7.11 Programme Item Number (PIN) .55
7.12 Programme Service name (PS) .55

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62106 © IEC:2009(E) – 3 –
7.13 Programme TYpe (PTY) .55
7.14 Programme TYpe Name (PTYN).55
7.15 Radio Paging (RP) .55
7.16 RadioText (RT).56
7.17 Enhanced RadioText (eRT) .56
7.18 RadioText Plus (RT+).56
7.19 Traffic Announcement identification (TA) .56
7.20 Transparent Data Channels (TDC) .56
7.21 Traffic Message Channel (TMC) .56
7.22 Traffic Programme identification (TP) .56
8 Marking .56
Annex A (normative) Offset words to be used for group and block synchronisation .58
Annex B (informative) Theory and implementation of the modified shortened cyclic
code .59
Annex C (informative) Implementation of group and block synchronisation using the
modified shortened cyclic code.65
Annex D (normative) Programme identification codes and Extended country codes .68
Annex E (normative) Basic and extended RDS character sets.72
Annex F (normative) Programme type codes.86
Annex G (informative) Conversion between time and date conventions.89
Annex H (informative) ARI (Autofahrer-Rundfunk-Information) system –
Discontinuation.91
Annex J (normative) Language identification.92
Annex K (informative) RDS logo .94
Annex L (informative) Open data registration .95
Annex M (normative) Coding of Radio Paging (RP).98
Annex N (normative) Country codes and extended country codes for countries outside
the European Broadcasting Area .130
Annex P (normative) Coding of RadioText Plus information (RT+) .135
Annex Q (normative) Coding of enhanced RadioText (eRT) . 147
Annex R (informative) RBDS in the USA .152
Annex S (normative) List of RDS specific abbreviations . 153
Bibliography.154

Figure 1 – Block diagram of radio-data equipment at the transmitter .12
Figure 2 – Block diagram of a typical radio-data receiver/decoder.12
Figure 3 – Amplitude response of the specified transmitter or receiver data-shaping
filter .15
Figure 4 – Amplitude response of the combined transmitter and receiver data-shaping
filters .15
Figure 5 – Spectrum of biphase coded radio-data signals .16
Figure 6 – Time-function of a single biphase symbol.16
Figure 7 – 57 kHz radio-data signals.16
Figure 8 – Structure of the baseband coding.17
Figure 9 – Message format and addressing.18
Figure 10 – ODA version A groups.24

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Figure 11 – ODA version B groups.25
Figure 12 – Basic tuning and switching information – Type 0A group .25
Figure 13 – Basic tuning and switching information – Type 0B group .26
Figure 14 – Programme Item Number and slow labelling codes – Type 1A group.27
Figure 15 – Programme Item Number – Type 1B group.28
Figure 16 – RadioText – Type 2A group.28
Figure 17 – RadioText – Type 2B group.29
Figure 18 – Application Identification for Open data – Type 3A group .30
Figure 19 – Open data – Type 3B group .31
Figure 20 – Clock-time and date transmission – Type 4A group .32
Figure 21 – Open data – Type 4B group .32
Figure 22 – Transparent data channels – Type 5A group .33
Figure 23 – Transparent data channels – Type 5B group .33
Figure 24 – In-house applications – Type 6A and 6B group.34
Figure 25 – Radio Paging – Type 7A group.34
Figure 26 – Type 7B group .35
Figure 27 – Traffic Message Channel – Type 8A group .35
Figure 28 – Open data – Type 8B group .35
Figure 29 – Allocation of EWS message bits – Type 9A group .36
Figure 30 – Open data – Type 9B group .36
Figure 31 – Programme Type Name PTYN – Type 10A group.37
Figure 32 – Open data – Type 10B group .37
Figure 33 – Open data – Type 11A and 11B groups.38
Figure 34 – Open data – Type 12A and 12B groups.38
Figure 35 – Enhanced Paging information – Type 13A group .39
Figure 36 – Open data – Type 13B group .40
Figure 37 – Enhanced Other Networks information – Type 14A groups .40
Figure 38 – Enhanced Other Networks information – Type 14B groups .40
Figure 39 – Open data – Type 15A group .41
Figure 40 – Fast basic tuning and switching information – Type 15B group.41
Figure 41 – Structure of Block 3 of Type 1A groups .48
Figure 42 – Structure of variant 12 of block 3 of type 14A groups (linkage information)
– National link.49
Figure 43 – Structure of variant 12 of block 3 of type 14A groups (linkage information)
– International link .50
Figure 44 – Structure of Variant 7 of Block 3 of type 1A groups for Identification of a
programme carrying EWS information.53
Figure B.1 – Generator matrix of the basic shortened cyclic code in binary notation .60
Figure B.2 – Shift-register implementation of the encoder .61
Figure B.3 – Parity-check matrix of the basic shortened cyclic code.62
Figure B.4 – Shift-register implementation of the decoder .63
Figure C.1 – Group and block synchronisation detection circuit .66
Figure D.1 – PI structure.68

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62106 © IEC:2009(E) – 5 –
Figure D.2 – Structure of Variant 0 of Block 3 of Type 1A groups (Extended Country
Codes).69
Figure D.3 – Correspondence between geographical locations and the symbols used
for the various countries within the European Broadcasting Area as an example .69
Figure G.1 – Conversion routes between Modified Julian Date (MJD) and Coordinated
Universal Time (UTC) .89
Figure J.1 – Language identification code allocation .92
Figure M.1 – Group type 7A message format for Radio Paging .101
Figure M.2 – Group type 7A paging without an additional message.102
Figure M.3 – Group type 7A paging with an additional 10 digit message .103
Figure M.4 – Group type 7A paging with an additional 18 digit message .103
Figure M.5 – Group type 7A paging with an additional alphanumeric message.104
Figure M.6 – Group type 7A paging with an additional international 15 digit message .105
Figure M.7 – Functions message in international paging .106
Figure M.8 – Variant 0 of 1A group with PIN .108
Figure M.9 – Variant 2 of 1A group with PIN .109
Figure M.10 – Variants of 1A group without PIN.110
Figure M.11 – Group type 13A .116
Figure M.12 – Tone-only message .118
Figure M.13 – First 7A group of a variable-length message.118
Figure M.14 – Group type 7A national paging with additional alphanumeric message .120
Figure M.15 – Group type 7A national paging with additional variable-length numeric
message .121
Figure M.16 – Group type 7A national paging with additional variable-length functions
message .122
Figure M.17 – The two first 7A groups of an international alphanumeric message.124
Figure M.18 – The two first 7A groups of an international variable-length numeric
message .124
Figure M.19 – The two first 7A groups of an international variable-length functions
message .124
Figure M.20 – Traffic handling capacity, busy hour, call rate = 0,10 calls/pager/hour . 128
Figure M.21 – Traffic handling capacity, busy hour, call rate = 0,067 calls/pager/hour . 129
Figure M.22 – Traffic handling capacity, busy hour, call rate = 0,05 calls/pager/hour . 129
Figure P.1 – RT+ information of the category ‘Item’ (see Table P.2) will be attached to
the programme elements Item 1 and Item 2 . 140
Figure P.2 – RT+ information of the category ‘Item’ will be attached to the programme
elements Item 1 and Item 2, but not to the programme element News. 140
Figure P.3 – RT+ information of the category ‘Item’ will be attached only to the
programme element Item 1, but not to the programme element Talk . 140
Figure P.4 – Bit allocation for group 3A (message bits and AID) . 141
Figure P.5 – Coding of the message bits of the application group . 142
Figure Q.1 – eRT information elements.147
Figure Q.2 – Bit allocation for group 3A (message bits and AID) .148
Figure Q.3 – Coding of the message bits of the application group. 149

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Table 1 – Encoding rules .13
Table 2 – Decoding rules .14
Table 3 – Group types .21
Table 4 – Main feature repetition rates.22
Table 5 – Group repetition rates .23
Table 6 – ODA group availability signalled in type 3A groups.24
Table 7 – STY codes .39
Table 8 – Codes for TP and TA.42
Table 9 – Bit d to d meanings.42
0 3
Table 10 – VHF code table .43
Table 11 – Special meanings code table .43
Table 12 – Code tables according to ITU regions.43
Table A.1 – Offset word codes .58
Table B.1 – Offset word syndromes using matrix of Figure B.3 .63
Table C.1 – Offset word syndromes for group and block synchronisation .67
Table D.1 – PI code structure .68
Table D.2 – Symbols used for ECC and PI country codes for the countries in the
European Broadcasting Area .70
Table D.3 – Area coverage codes .71
Table D.4 – Programme reference number codes .71
Table D.5 – PI codes for short range transmitting devices.71
Table E.1 – Basic RDS character set .72
Table E.2 – Extended RDS character set, for eRT only .73
Table F.1 – Programme type codes and corresponding terms for display .86
Table G.1 – Symbols used .89
Table J.1 – Language identification codes .92
Table M.1 – Pager group codes .99
Table M.2 – Codes for additional message contents . 102
Table M.3 – Paging segment address codes for 10 and 18 digit messages . 104
Table M.4 – Paging segment address codes for alphanumeric messages . 105
Table M.5 – Paging segment address codes for international 15 digit messages.106
Table M.6 – Paging segment address codes for functions message. 107
Table M.7 – Sub-usage codes.110
Table M.8 – Group designation codes.114
Table M.9 – Cycle selection codes.115
Table M.10 – Message sorting codes .115
Table M.11 – Codes for message types .117
Table M.12 – Description of the control byte .119
Table M.13 – Use of paging call repetition flag.119
Table M.14 – Paging segment address codes for alphanumeric message . 120
Table M.15 – Paging segment address codes for variable length numeric message. 121
Table M.16 – Paging segment address codes for variable length functions message .123
Table M.17 – Address notification (50 bits) .126

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62106 © IEC:2009(E) – 7 –
Table M.18 – Address notification (25 bits) .127
Table M.19 – Z3 parity relationship .127
Table P.1 – RT+ information elements .135
Table P.2 – Code list and ‘RT+ class’ description of ‘RT/eRT content types’ . 144

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INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

SPECIFICATION OF THE RADIO DATA SYSTEM (RDS) FOR VHF/FM
SOUND BROADCASTING IN THE FREQUENCY RANGE
FROM 87,5 MHz TO 108,0 MHz



FOREWORD
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