Audio and audiovisual equipment - Digital audio parts - Basic measurement methods of audio characteristics - Part 4: Personal computer

IEC 61606-4:2005 specifies the basic measurement methods of a linear PCM signal for an audio part of personal computers (PCs) and applies to both desktop and portable computers. The common measuring conditions and methods are described in IEC 61606-1. Specific conditions and methods of measurement for PCs are given in this standard. This bilingual version (2012-05) corresponds to the monolingual English version, published in 2005-12.

Equipement audio et audiovisuel - Parties audio numériques - Méthodes de mesure de base des caractéristiques audio - Partie 4: Ordinateur personnel

La CEI 61606-4:2005 spécifie les méthodes de mesure de base d'un signal PCM linéaire pour la partie audio des ordinateurs personnel (PC) et s'applique à la fois aux ordinateurs de bureau et portables. Les conditions et méthodes de mesure communes sont décrites dans la CEI 61606-1. Des conditions et méthodes de mesure spécifiques aux PC sont indiquées dans la présente norme. La présente version bilingue (2012-05) correspond à la version anglaise monolingue publiée en 2005-12.

General Information

Status
Published
Publication Date
15-Dec-2005
Current Stage
PPUB - Publication issued
Start Date
15-Mar-2006
Completion Date
16-Dec-2005
Ref Project

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IEC 61606-4:2005 - Audio and audiovisual equipment - Digital audio parts - Basic measurement methods of audio characteristics - Part 4: Personal computer Released:12/16/2005 Isbn:2831883806
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IEC 61606-4:2005 - Audio and audiovisual equipment - Digital audio parts - Basic measurement methods of audio characteristics - Part 4: Personal computer
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INTERNATIONAL IEC
STANDARD 61606-4
First edition
2005-12
Audio and audiovisual equipment –
Digital audio parts – Basic measurement
methods of audio characteristics –
Part 4:
Personal computer
Reference number
Publication numbering
As from 1 January 1997 all IEC publications are issued with a designation in the
60000 series. For example, IEC 34-1 is now referred to as IEC 60034-1.
Consolidated editions
The IEC is now publishing consolidated versions of its publications. For example,
edition numbers 1.0, 1.1 and 1.2 refer, respectively, to the base publication, the
base publication incorporating amendment 1 and the base publication incorporating
amendments 1 and 2.
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thus ensuring that the content reflects current technology. Information relating to
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INTERNATIONAL IEC
STANDARD 61606-4
First edition
2005-12
Audio and audiovisual equipment –
Digital audio parts – Basic measurement
methods of audio characteristics –
Part 4:
Personal computer
 IEC 2005  Copyright - all rights reserved
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 the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch
PRICE CODE
Commission Electrotechnique Internationale V
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
For price, see current catalogue

– 2 – 61606-4  IEC:2005(E)
CONTENTS
FOREWORD.4

1 Scope.6
2 Normative references .6
3 Terms, definitions and abbreviated terms .6
3.1 Terms and definitions .6
3.2 Abbreviated terms .8
3.3 Rated values .8
4 Measuring conditions.8
4.1 Environmental conditions .8
4.2 Power supplies.8
4.3 Test signal frequencies .9
4.4 Standard setting .10
4.5 Working setting .11
4.6 Preconditioning .12
5 Measuring instruments .12
5.1 Analogue signal generator.12
5.2 Analogue in-band level meter .12
5.3 Analogue low-pass filter .12
5.4 Analogue weighting filter .12
5.5 Standard medium .12
5.6 Recording medium .13
5.7 Software for digital data evaluation.13
5.8 Short-term distortion meter.14
5.9 Other instruments.14
6 Methods of measurement (digital-in/analogue-out) .14
6.1 Input/output characteristics .15
6.2 Frequency response.16
6.3 Noise characteristics .17
6.4 Distortion characteristics .21
7 Methods of measurement (analogue-in/digital-out) .23
7.1 Input/output characteristics .23
7.2 Frequency response.25
7.3 Noise characteristics .26
7.4 Distortion characteristics .29

Figure 1 – Block diagram for maximum output amplitude measurement .15
Figure 2 – Block diagram for gain difference between channels measurement .16
Figure 3 – Block diagram for frequency-response measurement .16
Figure 4 – Block diagram for signal-to-noise ratio measurement .17
Figure 5 – Block diagram for dynamic range measurement .18
Figure 6 – Block diagram for channel separation measurement.20
Figure 7 – Block diagram for distortion and noise measurement.21
Figure 8 – Block diagram for short-term distortion measurement.22
Figure 9 – Block diagram for maximum allowable input amplitude measurement .23

61606-4  IEC:2005(E) – 3 –
Figure 10 – Block diagram for gain difference between channel and tracking error
measurement.24
Figure 11 – Block diagram for frequency response measurement.25
Figure 12 – Block diagram for signal-to-noise ratio measurement .26
Figure 13 – Block diagram for dynamic range measurement .27
Figure 14 – Block diagram for channel separation measurement.28
Figure 15 – Block diagram for distortion and noise measurement.29
Figure 16 – Block diagram for short-term distortion measurement.30

Table 1 – Frequencies used in the measurement .9

– 4 – 61606-4  IEC:2005(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
AUDIO AND AUDIOVISUAL EQUIPMENT –
DIGITAL AUDIO PARTS –
BASIC MEASUREMENT METHODS
OF AUDIO CHARACTERISTICS –
Part 4: Personal computer
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61606-4 has been prepared by IEC technical committee 100:
Audio, video and multimedia equipment and systems.
The text of this standard is based on the following documents:
CDV Report on voting
100/952/CDV 100/1030/RVC
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

61606-4  IEC:2005(E) – 5 –
IEC 61606 consists of the following parts under the general title Audio and audiovisual
equipment – Digital audio parts – Basic measurement methods of audio characteristics:
Part 1: General
Part 2: Consumer use
Part 3: Professional use
Part 4: Personal computer
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result date indicated on the IEC web site 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.
A bilingual version of this publication may be issued at a later date.
———————
Under consideration.
– 6 – 61606-4  IEC:2005(E)
AUDIO AND AUDIOVISUAL EQUIPMENT –
DIGITAL AUDIO PARTS –
BASIC MEASUREMENT METHODS
OF AUDIO CHARACTERISTICS –
Part 4: Personal computer
1 Scope
This part of IEC 61606 specifies the basic measurement methods of a linear PCM signal for
an audio part of personal computers (PCs) and applies to both desktop and portable
computers. The common measuring conditions and methods are described in IEC 61606-1.
Specific conditions and methods of measurement for PCs are given in this standard.
NOTE 1 The methods described are mostly based on sampling frequencies from 8 kHz to 192 kHz and bit length
from 8 bit to 24 bit.
NOTE 2 This standard describes tests for equipment which has digital input with analogue output and analogue
input with digital output. Digital input data are provided from an internal HDD or other
...


IEC 61606-4 ®
Edition 1.0 2005-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Audio and audiovisual equipment – Digital audio parts – Basic measurement
methods of audio characteristics –
Part 4: Personal computer
Equipement audio et audiovisuel – Parties audio numériques – Méthodes de
mesure de base des caractéristiques audio –
Partie 4: Ordinateur personnel

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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microfilms, sans l'accord écrit de la CEI ou du Comité national de la CEI du pays du demandeur.
Si vous avez des questions sur le copyright de la CEI ou si vous désirez obtenir des droits supplémentaires sur cette
publication, utilisez les coordonnées ci-après ou contactez le Comité national de la CEI de votre pays de résidence.

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IEC 61606-4 ®
Edition 1.0 2005-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Audio and audiovisual equipment – Digital audio parts – Basic measurement

methods of audio characteristics –

Part 4: Personal computer
Equipement audio et audiovisuel – Parties audio numériques – Méthodes de

mesure de base des caractéristiques audio –

Partie 4: Ordinateur personnel

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX V
ICS 35.020; 33.160.30 ISBN 978-2-88912-903-4

– 2 – 61606-4  IEC:2005
CONTENTS
FOREWORD . 4

1 Scope . 6
2 Normative references . 6
3 Terms, definitions and abbreviated terms . 6
3.1 Terms and definitions . 6
3.2 Abbreviated terms . 8
3.3 Rated values . 8
4 Measuring conditions . 8
4.1 Environmental conditions . 8
4.2 Power supplies . 8
4.3 Test signal frequencies . 9
4.4 Standard setting . 10
4.5 Working setting . 11
4.6 Preconditioning . 12
5 Measuring instruments . 12
5.1 Analogue signal generator . 12
5.2 Analogue in-band level meter . 12
5.3 Analogue low-pass filter . 12
5.4 Analogue weighting filter . 12
5.5 Standard medium . 12
5.6 Recording medium . 13
5.7 Software for digital data evaluation . 13
5.8 Short-term distortion meter . 14
5.9 Other instruments . 14
6 Methods of measurement (digital-in/analogue-out) . 14
6.1 Input/output characteristics . 15
6.2 Frequency response . 16
6.3 Noise characteristics . 17
6.4 Distortion characteristics . 21
7 Methods of measurement (analogue-in/digital-out) . 23
7.1 Input/output characteristics . 23
7.2 Frequency response . 25
7.3 Noise characteristics . 26
7.4 Distortion characteristics . 29

Figure 1 – Block diagram for maximum output amplitude measurement . 15
Figure 2 – Block diagram for gain difference between channels measurement . 16
Figure 3 – Block diagram for frequency-response measurement . 16
Figure 4 – Block diagram for signal-to-noise ratio measurement . 17
Figure 5 – Block diagram for dynamic range measurement . 18
Figure 6 – Block diagram for channel separation measurement. 20
Figure 7 – Block diagram for distortion and noise measurement . 21
Figure 8 – Block diagram for short-term distortion measurement . 22
Figure 9 – Block diagram for maximum allowable input amplitude measurement . 23

61606-4  IEC:2005 – 3 –
Figure 10 – Block diagram for gain difference between channel and tracking error
measurement . 24
Figure 11 – Block diagram for frequency response measurement . 25
Figure 12 – Block diagram for signal-to-noise ratio measurement . 26
Figure 13 – Block diagram for dynamic range measurement . 27
Figure 14 – Block diagram for channel separation measurement . 28
Figure 15 – Block diagram for distortion and noise measurement . 29
Figure 16 – Block diagram for short-term distortion measurement . 30

Table 1 – Frequencies used in the measurement . 9

– 4 – 61606-4  IEC:2005
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
AUDIO AND AUDIOVISUAL EQUIPMENT –
DIGITAL AUDIO PARTS –
BASIC MEASUREMENT METHODS
OF AUDIO CHARACTERISTICS –
Part 4: Personal computer
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect
...

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