SIST EN 61937-7:2006/A1:2016

Digital audio - Interface for non-linear PCM encoded audio bitstreams applying IEC 60958 - Part 7: Non-linear PCM bitstreams according to the ATRAC, ATRAC2/3 and ATRAC-X formats (TA 4)

Specifies the method for the digital audio interface specified in EN 60958 to convey non-linear PCM bitstreams encoded in accordance with the ATRAC, ATRAC2/3 and ATRAC-X formats.

Digitalton - Schnittstelle für nichtlinear-PCM-codierte Audio-Bitströme unter Verwendung von IEC 60958 - Teil 7: Nichtlineare PCM-Bitströme entsprechend ATRAC-, ATRAC2/3- und ATRAC-X-Formaten

Audionumérique - Interface pour les flux de bits audio à codage MIC (PCM) non linéaire conformément à la CEI 60958 - Partie 7: Flux de bits MIC (PCM) non-linéaire selon les formats ATRAC, 2/3 ATRAC et X-ATRAC

La CEI 61937-7:2004 spécifie la méthode pour l'interface audionumérique spécifiée dans la CEI 60958 pour acheminer des flux de bits MIC non linéaire codés selon les formats ATRAC, ATRAC2/3 et ATRAC-X. La présente deuxième édition annule et remplace la première édition parue en 2002. Cette édition constitue une révision technique. Elle contient les importantes modifications techniques suivantes: Dans cette édition, un nouveau type de données audio au format ATRAC-X est ajouté au aux formats ATRAC et ATRAC2/3. Les caractéristiques particulières, telles que les points de référence, la période de répétition, la méthode pour combler les intervalles entre flux et le temps de latence du décodage, sont spécifiées pour le type de données ATRAC-X.

Digitalni avdio - Vmesnik za nelinearne PCM-kodirane avdio bitne tokove po IEC 60958 - 7. del: Nelinearni PCM-bitni tokovi v formatih ATRAC, ATRAC2/3 in ATRAC-X (TA 4)

General Information

• Status: Published
• Publication Date: 25-Oct-2016
• ICS: 33.160.30 - Audio systems
• ICS: 35.200 - Interface and interconnection equipment
• Technical Committee: AVM - Audio, video and multimedia systems and equipment
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 19-Sep-2016
• Due Date: 24-Nov-2016
• Completion Date: 26-Oct-2016
• Ref Project: EN 61937-7:2005/A1:2016 - Digital audio - Interface for non-linear PCM encoded audio bitstreams applying IEC 60958 - Part 7: Non-linear PCM bitstreams according to the ATRAC, ATRAC2/3 and ATRAC-X formats (TA 4)

Overview

The SIST EN 61937-7:2006/A1:2016 standard, developed by the CLC (European Committee for Electrotechnical Standardization), specifies the digital audio interface method defined in EN 60958 for the transmission of non-linear PCM (Pulse Code Modulation) encoded audio bitstreams. This part 7 focuses specifically on non-linear PCM bitstreams encoded according to the ATRAC, ATRAC2/3, and ATRAC-X formats (TA 4).

This amendment refines the original EN 61937-7:2005 by incorporating several updates to support new subdata-types of ATRAC-X low latency formats, addressing key interface parameters such as reference points, repetition periods, and decoding latencies.

Key Topics

• Non-linear PCM Audio Bitstreams: Defines the digital interface for ATRAC family formats, including ATRAC, ATRAC2/3, and ATRAC-X audio encodings.
• ATRAC-X Low Latency Subdata-Types: Specifies three additional ATRAC-X low latency subdata-types to support various sampling rates and latency requirements.
• Reference Points and Timing: Explains the timing of data bursts, defining precise reference points (Pa) in IEC 60958 frames that mark the start of audio data bursts and ensure synchronization.
• Decoding Latency Specification: Provides detailed calculations and examples for decoding latency based on sampling frequency and frame size, critical for low latency audio applications.
• Burst-info Fields and Data Structure: Clarifies the bit structure and repetition periods for burst data conveying ATRAC, ATRAC2/3, and ATRAC-X coded audio.
• Compatibility with IEC 60958 Interface: Ensures that the digital audio interface maintains compliance while extending support for advanced ATRAC codec functionalities.

Applications

This standard is essential for manufacturers and developers working on:

• Digital audio transmission systems that require standardized interfaces for compressed PCM audio bitstreams.
• Consumer electronics such as digital audio players, recorders, and transmitters that utilize ATRAC-based audio codecs.
• Audio broadcasting and multimedia systems where efficient, low latency audio transport is critical.
• Interface design for audio equipment implementing the IEC 60958 digital audio interface with extended support for ATRAC codecs.
• Professional audio processing and signal chain devices requiring guaranteed timing and decoding latency parameters for ATRAC formats.
• Development of embedded systems using ATRAC and ATRAC-X audio encodings optimized for low-latency digital audio streams.

Related Standards

• EN 60958 (IEC 60958): The foundational standard defining the digital audio interface used to transmit IEC 61937 encapsulated data.
• IEC 61937-1 & IEC 61937-2: Core parts of the IEC 61937 series that outline general requirements and data formatting for compressed audio bitstreams.
• ATRAC-X Audio Codec Specifications: Vendor-specific documentation, including Sony’s ATRAC-X and ATRAC-X low latency standards, detailing codec frame formats and bit rates.
• CENELEC Digital Audio Standards: Regulations and national implementations that enforce harmonized use of digital audio interfaces within Europe.
• IEC Technical Committee 100 Documentation: Guidance on audio, video, and multimedia system standards applicable to digital audio interfaces.

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Keywords: SIST EN 61937-7:2006/A1:2016, digital audio interface, non-linear PCM, ATRAC, ATRAC2/3, ATRAC-X, IEC 60958, low latency audio, digital audio bitstreams, decoding latency, audio codec standards, multimedia interfaces, CLC standards, IEC audio transmission

Standards Content (Sample)

SLOVENSKI STANDARD
01-december-2016
Digitalni avdio - Vmesnik za nelinearne PCM-kodirane avdio bitne tokove po IEC
60958 - 7. del: Nelinearni PCM-bitni tokovi v formatih ATRAC, ATRAC2/3 in ATRAC
-X (TA 4)
Digital audio - Interface for non-linear PCM encoded audio bitstreams applying IEC
60958 - Part 7: Non-linear PCM bitstreams according to the ATRAC, ATRAC2/3 and
ATRAC-X formats (TA 4)
Digitalton - Schnittstelle für nichtlinear-PCM-codierte Audio-Bitströme unter Verwendung
von IEC 60958 - Teil 7: Nichtlineare PCM-Bitströme entsprechend ATRAC-, ATRAC2/3-
und ATRAC-X-Formaten
Audionumérique - Interface pour les flux de bits audio à codage MIC (PCM) non linéaire
conformément à la CEI 60958 - Partie 7: Flux de bits MIC (PCM) non-linéaire selon les
formats ATRAC, 2/3 ATRAC et X-ATRAC
Ta slovenski standard je istoveten z: EN 61937-7:2005/A1:2016
ICS:
33.160.30 Avdio sistemi Audio systems
35.200 Vmesniška in povezovalna Interface and interconnection
oprema equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 61937-7:2005/A1

NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2016
ICS 33.160.01
English Version
Digital audio - Interface for non-linear PCM encoded audio
bitstreams applying IEC 60958 - Part 7: Non-linear PCM
bitstreams according to the ATRAC, ATRAC2/3 and ATRAC-X
formats (TA 4)
(IEC 61937-7:2004/A1:2016)
Audionumérique - Interface pour les flux de bits audio à Digitalton - Schnittstelle für nichtlinear-PCM-codierte Audio-
codage MIC (PCM) non linéaire conformément à la CEI Bitströme unter Verwendung von IEC 60958 - Teil 7:
60958 - Partie 7: Flux de bits MIC (PCM) non-linéaire selon Nichtlineare PCM-Bitströme entsprechend ATRAC-,
les formats ATRAC, 2/3 ATRAC et X-ATRAC ATRAC2/3- und ATRAC-X-Formaten
(IEC 61937-7:2004/A1:2016) (IEC 61937-7:2004/A1:2016)
This amendment A1 modifies the European Standard EN 61937-7:2005; it was approved by CENELEC on 2016-06-17. CENELEC
members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this amendment the
status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This amendment exists in three official versions (English, French, German). A version in any other language made by translation under the
responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as
the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2016 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 61937-7:2005/A1:2016 E

European foreword
The text of document 100/2503/CDV, future IEC 61937-7:2005/A1, prepared by IEC/TC 100, "Audio,
video and multimedia systems and equipment" was submitted to the IEC-CENELEC parallel vote and
approved by CENELEC as EN 61937-7:2005/A1:2016.
The following dates are fixed:
• latest date by which the document has (dop) 2017-03-17
to be implemented at national level by
publication of an identical national
standard or by endorsement
(dow) 2019-06-17
• latest date by which the national
standards conflicting with the
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent
rights.
Endorsement notice
The text of the International Standard IEC 61937-7:2005/A1:2016 was approved by CENELEC as a
European Standard without any modification.
IEC 61937-7 ®
Edition 2.0 2016-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AM ENDMENT 1
AM ENDEMENT 1
Digital audio – Interface for non-linear PCM encoded audio bitstreams applying

to IEC 60958 –
Part 7: Non-linear PCM bitstreams according to the ATRAC, ATRAC2/3 and

ATRAC-X formats
Audionumérique – Interface pour les flux de bits audio à codage MIC non

linéaire conformément à l’IEC 60958 –

Partie 7: Flux de bits MIC non linéaire selon les formats ATRAC, ATRAC2/3 et

ATRAC-X
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.160.01 ISBN 978-2-8322-3284-2

– 2 – IEC 61937-7:2004/AMD1:2016
© IEC 2016
FOREWORD
This amendment has been prepared by technical area 4: Digital system interfaces and
protocols of IEC technical committee 100: Audio, video and multimedia systems and
equipment.
The text of this amendment is based on the following documents:
CDV Report on voting
100/2503/CDV 100/2614/RVC
Full information on the voting for the approval of this amendment can be found in the report
on voting indicated in the above table.
The committee has decided that the contents of this amendment and the base publication will
remain unchanged until the stability date indicated on the IEC website under
"http://webstore.iec.ch" in the data related to the specific publication. At this date, the
publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
_____________
Insert, after the FOREWORD
...