IEC 60958-4-2:2016

Digital audio interface - Part 4-2: Professional applications - Metadata and subcode

IEC 60958-4-2:2016 specifies the format for coding metadata, or subcode, that relates to the audio content and is carried with it. This part of IEC 60958, together with IEC 60958-1, IEC 60958-4-1, and IEC 60958-4-4, specifies an interface for serial digital transmission of two channels of periodically sampled and linearly represented digital audio data from one transmitter to one receiver. This first edition, together with IEC 60958-4-1 and IEC 60958-4-4, cancels and replaces IEC 60958-4 published in 2003 and its Amendment 1:2008 and constitutes a technical revision. This edition includes the following significant technical changes with respect to IEC 60958-4:2003 with its Amendment 1:2008:
- support for a wider range of physical media;
- support for a wider range of audio sampling frequencies;
- deprecation of "minimum implementation" of channel status data.

Interface audionumérique - Partie 4-2: Applications professionnelles - Métadonnées et sous-code

L'IEC 60958-4-2:2016 spécifie le format de codage de métadonnées ou d'un sous-code, qui sont relatifs au contenu audio et sont transportés avec ce dernier. La présente partie de l'IEC 60958 et l'IEC 60958-1, l'IEC 60958-4-1 et l'IEC 60958-4-4 précisent conjointement une interface de transmission numérique en série de deux voies de données audionumériques échantillonnées de façon périodique et représentées de façon linéaire entre un émetteur et un récepteur. Cette première édition, avec l'IEC 60958-4-1 et l'IEC 60958-4-4, annule et remplace l'IEC 60958-4 parue en 2003 et l'Amendement 1:2008 et constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'IEC 60958-4:2003 et son Amendement 2008:
- prise en charge d'une gamme plus large de supports physiques;
- prise en charge d'une gamme plus large de fréquences d'échantillonnage audio;
- "mise en oeuvre minimale" des données de la voie de signalisation déconseillée.

General Information

• Status: Published
• Publication Date: 23-Mar-2016
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 33.160.30 - Audio systems
• Technical Committee: TC 100 - Audio, video and multimedia systems and equipment
• Current Stage: PPUB - Publication issued
• Start Date: 30-Apr-2016
• Completion Date: 24-Mar-2016

Relations

• Replaces: IEC 60958-4:2003/AMD1:2008 - Amendment 1 - Digital audio interface - Part 4: Professional applications
• Effective Date: 05-Sep-2023
• Replaces: IEC 60958-4:2003 - Digital audio interface - Part 4: Professional applications
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 60958-4-2 ®
Edition 1.0 2016-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Digital audio interface –
Part 4-2: Professional applications – Metadata and subcode

Interface audionumérique –
Partie 4-2: Applications professionnelles – Métadonnées et sous-code

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IEC 60958-4-2 ®
Edition 1.0 2016-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Digital audio interface –
Part 4-2: Professional applications – Metadata and subcode

Interface audionumérique –
Partie 4-2: Applications professionnelles – Métadonnées et sous-code

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.160.30 ISBN 978-2-8322-3247-7

– 2 – IEC 60958-4-2:2016 © IEC 2016
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references. 7
3 Terms, definitions and abbreviations . 7
3.1 Terms and definitions . 7
3.2 Abbreviations . 8
4 User data format . 8
5 Channel status format . 8
5.1 Channel status bit . 8
5.2 Channel status block . 8
5.3 Implementation . 9
5.3.1 Implementation levels . 9
5.3.2 Transmitter requirement . 9
5.3.3 Receiver requirement . 9
5.4 Documentation . 9
5.5 Channel status content . 9
5.5.1 General . 9
5.5.2 Byte 0: Basic audio parameters . 11
5.5.3 Byte 1: Channel modes, user bits management . 12
5.5.4 Byte 2: Auxiliary bits, word length and alignment level . 12
5.5.5 Byte 3: Multichannel modes . 13
5.5.6 Byte 4: DARS, hidden information, multiple-rate sampling frequencies . 14
5.5.7 Byte 5: Reserved . 15
5.5.8 Bytes 6 to 9: Alphanumeric channel origin . 16
5.5.9 Bytes 10 to 13: Alphanumeric channel destination . 16
5.5.10 Bytes 14 to 17: Local sample address code . 16
5.5.11 Bytes 18 to 21: Time-of-day sample address code . 16
5.5.12 Byte 22: Reserved . 16
5.5.13 Byte 23: Channel status data CRCC . 17
5.6 Channel status when non-PCM audio is flagged . 17
6 Auxiliary bits . 17
6.1 Availability of auxiliary bits . 17
6.2 Use of auxiliary bits . 17
Annex A (informative) Channel modes . 18
Annex B (informative) Provision of additional, voice-quality channels . 19
Annex C (informative) Generation of CRCC (byte 23) for channel status . 20
Bibliography . 22

Figure 1 – Channel status data format . 10
Figure B.1 – Frame and block structure . 19
Figure C.1 – Flow diagram including exclusive or gates . 20

Table 1 – Non-PCM audio, protected status bits . 17

– 4 – IEC 60958-4-2:2016 © IEC 2016
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
DIGITAL AUDIO INTERFACE –
Part 4-2: Professional applications – Metadata and subcode

FOREWORD
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