IEC 61606-1:2009

Audio and audiovisual equipment - Digital audio parts - Basic measurement methods of audio characteristics - Part 1: General

IEC 61606-1:2009 is applicable to the basic methods of measurement of the audio characteristics of the digital audio part of audio and audiovisual equipment for all of consumer use, professional use and personal computer. The common measuring conditions and methods, described in this standard, are used for the measurement of the performance characteristics of equipment having an audio bandwidth equal to approximately one-half of the sampling frequency of a system, where the audio information is processed in the form of digital data. CD players, DAT recorders, digital amplifiers, digital sound broadcast receivers and television broadcast receivers with digital sound are examples. It describes test methods for equipment which has digital input with analogue output and analogue input with digital output. Future revisions of this standard will cover digital-in/digital-out and analogue-in/analogue-out tests. It constitutes a technical revision. The significant technical changes with respect to the first edition are the following:
- changed the period of preconditioning;
- add A weighting filter in measuring instruments;
- correct the wrong reference number;
- some inappropriate descriptions have been improved.

Equipements audio et audiovisuels - Parties audionumériques - Méthodes fondamentales pour la mesure des caractéristiques audio - Partie 1: Généralités

L'IEC 61606-1:2009 est applicable aux méthodes fondamentales pour la mesure des caractéristiques audio de la partie audionumérique des équipements audio et audiovisuels destinés à tous les usages grand public, professionnel et pour ordinateur individuel.
Les conditions et les méthodes de mesure communes, décrites par la présente Norme, sont utilisées pour la mesure des caractéristiques de performance des équipements ayant une largeur de bande audio approximativement égale à la moitié de la fréquence d'échantillonnage du système dans lequel les informations audio sont traitées sous forme de données numériques. Les lecteurs de CD, les enregistreurs DAT, les amplificateurs numériques, les récepteurs de radiodiffusion numérique et les récepteurs d'émissions de télévision avec son numérique en sont des exemples.
La présente Norme décrit des méthodes d'essai relatives aux équipements dont l'entrée est numérique et dont la sortie est analogique et celles relatives aux équipements dont l'entrée est analogique et dont la sortie est numérique. Les futures révisions de la présente Norme couvriront des méthodes d'essai relatives aux équipements dont l'entrée est numérique, ainsi que la sortie et celles relatives aux équipements dont l'entrée est analogique, ainsi que la sortie.
La présente Norme ne s'applique pas à un signal de compression avec perte, ni aux amplificateurs de puissance.
L'IEC 61606-1:2009 annule et remplace la première édition parue en 2003. Elle constitue une révision technique.
Les modifications techniques majeures par rapport à la première édition sont les suivantes:
- modification de la période de préconditionnement;
- adjonction d'un filtre de pondération A dans les appareils de mesure;
- correction du numéro de référence erroné;
- certaines descriptions inadaptées ont été améliorées.

General Information

• Status: Published
• Publication Date: 08-Jul-2009
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 33.160.01 - Audio, video and audiovisual systems in general
• Technical Committee: TA 20 - Analogue and digital audio
• Current Stage: PPUB - Publication issued
• Start Date: 15-Aug-2009
• Completion Date: 09-Jul-2009

Relations

• Revises: IEC 61606-1:2003 - Audio and audiovisual equipment - Digital audio parts - Basic measurement methods of audio characteristics - Part 1: General
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 61606-1 ®
Edition 2.0 2009-07
INTERNATIONAL
STANDARD
Audio and audiovisual equipment – Digital audio parts – Basic measurement
methods of audio characteristics –
Part 1: General
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester.
If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication,
please contact the address below or your local IEC member National Committee for further information.

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International Standards for all electrical, electronic and related technologies.

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IEC 61606-1 ®
Edition 2.0 2009-07
INTERNATIONAL
STANDARD
Audio and audiovisual equipment – Digital audio parts – Basic measurement
methods of audio characteristics –
Part 1: General
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
U
ICS 33.160.01 ISBN 978-2-88910-547-2
– 2 – 61606-1 © IEC:2009(E)
CONTENTS
FOREWORD.4
1 Scope.6
2 Normative references .6
3 Terms, definitions, explanations and rated values .7
3.1 Terms and definitions .7
3.2 Explanation of term “jitter” .9
3.3 Rated values .9
4 Measuring conditions.10
4.1 Environmental conditions .10
4.2 Power supply.10
4.2.1 Supply voltage.10
4.2.2 Frequency(ies) .10
4.2.3 High-frequency and harmonic components (or ripples) in the power
supply output.10
4.3 Test signal frequencies .10
4.4 Standard setting .11
4.4.1 Standard input conditions for the EUT .11
4.4.2 Standard output conditions for the EUT .12
4.4.3 Standard setting of controls .12
4.5 Preconditioning .12
4.6 Measuring instruments .13
4.6.1 General .13
4.6.2 Signal generator .13
4.6.3 Filter.15
4.6.4 Level meter .16
4.6.5 Distortion meter.17
4.6.6 Frequency meter .18
4.6.7 Group delay meter.18
4.6.8 Analogue spectrum analyzer.19
4.6.9 Digital waveform monitor .19
4.6.10 Voltage amplifier .19
4.6.11 Standard digital player.20
5 Methods of measurement (digital-in/analogue-out) .20
5.1 General .20
5.2 Input/output characteristics .20
5.2.1 Maximum output amplitude .20
5.2.2 Gain difference between channels and tracking error .20
5.3 Frequency characteristics.21
5.3.1 Frequency response .21
5.3.2 Group delay (phase linearity).21
5.4 Noise characteristics .21
5.4.1 Signal-to-noise ratio (idle channel noise) .21
5.4.2 Dynamic range .22
5.4.3 Out-of-band noise ratio.22
5.4.4 Channel separation .22
5.5 Distortion characteristics .23

61606-1 © IEC:2009(E) – 3 –
5.5.1 Level non-linearity .23
5.5.2 Distortion and noise.23
5.5.3 Intermodulation.23
6 Methods of measurement (analogue-in/digital-out) .23
6.1 General .23
6.2 Input/output characteristics .23
6.2.1 Analogue to digital level calibration .23
6.2.2 Maximum allowable input amplitude.24
6.2.3 Gain difference between channel and tracking error .24
6.3 Frequency characteristics.24
6.3.1 Frequency response .24
6.3.2 Group delay.25
6.4 Noise characteristics .25
6.4.1 Signal-to-noise ratio (idle channel noise) .25
6.4.2 Dynamic range .25
6.4.3 Folded noise.26
6.4.4 Cross-talk.26
6.4.5 Channel separation .26
6.5 Distortion characteristics .26
6.5.1 Level non-linearity .26
6.5.2 Distortion and noise.27
6.5.3 Intermodulation.27
Bibliography.28

Figure 1 – Analogue test signal waveform.14
Figure 2 – Digital test signal waveform .14

Table 1 – Actual frequencies used in the measurement .11
Table 2 – Impulse conditions and measuring range.19

– 4 – 61606-1 © IEC:2009(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
AUDIO AND AUDIOVISUAL EQUIPMENT –
DIGITAL AUDIO PARTS –
BASIC MEASUREMENT METHODS
OF AUDIO CHARACTERISTICS –
Part 1: General
FOREWORD
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international co-operation on all questions concerning standardization in the electrical and electronic fields. To
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International Standard IEC 61606-1 has been prepared by IEC technical commit
...

IEC 61606-1 ®
Edition 2.0 2009-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Audio and audiovisual equipment – Digital audio parts – Basic measurement
methods of audio characteristics –
Part 1: General
Équipements audio et audiovisuels – Parties audionumériques – Méthodes
fondamentales pour la mesure des caractéristiques audio –
Partie 1: Généralités
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

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International Standards for all electrical, electronic and related technologies.

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IEC 61606-1 ®
Edition 2.0 2009-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Audio and audiovisual equipment – Digital audio parts – Basic measurement

methods of audio characteristics –

Part 1: General
Équipements audio et audiovisuels – Parties audionumériques – Méthodes

fondamentales pour la mesure des caractéristiques audio –

Partie 1: Généralités
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.160.01 ISBN 978-2-8322-1005-5

– 2 – IEC 61606-1:2009  IEC 2009
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms, definitions, explanations and rated values . 7
3.1 Terms and definitions . 7
3.2 Explanation of term “jitter” . 9
3.3 Rated values . 10
4 Measuring conditions . 10
4.1 Environmental conditions . 10
4.2 Power supply . 10
4.2.1 Supply voltage . 10
4.2.2 Frequency(ies) . 10
4.2.3 High-frequency and harmonic components (or ripples) in the power
supply output . 10
4.3 Test signal frequencies . 10
4.4 Standard setting . 11
4.4.1 Standard input conditions for the EUT . 11
4.4.2 Standard output conditions for the EUT . 12
4.4.3 Standard setting of controls . 12
4.5 Preconditioning . 12
4.6 Measuring instruments . 13
4.6.1 General . 13
4.6.2 Signal generator . 13
4.6.3 Filter . 15
4.6.4 Level meter . 16
4.6.5 Distortion meter . 17
4.6.6 Frequency meter . 18
4.6.7 Group delay meter . 18
4.6.8 Analogue spectrum analyzer . 19
4.6.9 Digital waveform monitor . 19
4.6.10 Voltage amplifier . 19
4.6.11 Standard digital player . 20
5 Methods of measurement (digital-in/analogue-out) . 20
5.1 General . 20
5.2 Input/output characteristics . 20
5.2.1 Maximum output amplitude . 20
5.2.2 Gain difference between channels and tracking error . 20
5.3 Frequency characteristics . 21
5.3.1 Frequency response . 21
5.3.2 Group delay (phase linearity) . 21
5.4 Noise characteristics . 21
5.4.1 Signal-to-noise ratio (idle channel noise) . 21
5.4.2 Dynamic range . 22
5.4.3 Out-of-band noise ratio . 22
5.4.4 Channel separation . 22
5.5 Distortion characteristics . 23
5.5.1 Level non-linearity . 23

5.5.2 Distortion and noise . 23
5.5.3 Intermodulation. 23
6 Methods of measurement (analogue-in/digital-out) . 23
6.1 General . 23
6.2 Input/output characteristics . 23
6.2.1 Analogue to digital level calibration . 23
6.2.2 Maximum allowable input amplitude. 24
6.2.3 Gain difference between channel and tracking error . 24
6.3 Frequency characteristics . 24
6.3.1 Frequency response . 24
6.3.2 Group delay . 25
6.4 Noise characteristics . 25
6.4.1 Signal-to-noise ratio (idle channel noise) . 25
6.4.2 Dynamic range . 25
6.4.3 Folded noise . 26
6.4.4 Cross-talk . 26
6.4.5 Channel separation . 26
6.5 Distortion characteristics . 26
6.5.1 Level non-linearity . 26
6.5.2 Distortion and noise . 27
6.5.3 Intermodulation. 27
Bibliography . 28

Figure 1 – Analogue test signal waveform . 14
Figure 2 – Digital test signal waveform . 14

Table 1 – Actual frequencies used in the measurement . 11
Table 2 – Impulse conditions and measuring range . 19

– 4 – IEC 61606-1:2009  IEC 2009
INTERNATIONAL ELECTROTEC
...