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1、INTERNATIONAL STANDARD IEC 61606-1 First edition 2003-10 Audio and audiovisual equipment Digital audio parts Basic measurement methods of audio characteristics Part 1: General Reference number IEC 61606-1:2003(E) Copyright International Electrotechnical Commission Provided by IHS under license with
2、IECLicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/09/2007 07:56:23 MSTNo reproduction or networking permitted without license from IHS -,-,- Publication numbering As from 1 January 1997 all IEC publications are issued with a designation in the 60000 series. For example, IEC
3、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 incor
4、porating amendments 1 and 2. Further information on IEC publications The technical content of IEC publications is kept under constant review by the IEC, thus ensuring that the content reflects current technology. Information relating to this publication, including its validity, is available in the I
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7、is also available on recently issued publications, withdrawn and replaced publications, as well as corrigenda. IEC Just Published This summary of recently issued publications (http:/www.iec.ch/online_news/ justpub/jp_entry.htm) is also available by email. Please contact the Customer Service Centre (
8、see below) for further information. Customer Service Centre If you have any questions regarding this publication or need further assistance, please contact the Customer Service Centre: Email: custserviec.ch Tel: +41 22 919 02 11 Fax: +41 22 919 03 00 Copyright International Electrotechnical Commissi
9、on Provided by IHS under license with IECLicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/09/2007 07:56:23 MSTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD IEC 61606-1 First edition 2003-10 Audio and audiovisual equipment Digital
10、 audio parts Basic measurement methods of audio characteristics Part 1: General IEC 2003 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 writin
11、g from the publisher. International Electrotechnical Commission, 3, rue de Varemb, PO Box 131, CH-1211 Geneva 20, Switzerland Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmailiec.ch Web: www.iec.ch T For price, see current catalogue PRICE CODE Commission Electrotechnique Internati
12、onale International Electrotechnical Commission Copyright International Electrotechnical Commission Provided by IHS under license with IECLicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/09/2007 07:56:23 MSTNo reproduction or networking permitted without license from IHS -,-,-
13、 2 61606-1 IEC:2003(E) CONTENTS FOREWORD 4 1Scope 6 2Normative references. 6 3Terms, definitions, explanations and rated values 7 4Measuring conditions10 4.1Environmental conditions.10 4.2Power supply.10 4.2.1Supply voltage .10 4.2.2Frequency(ies).10 4.2.3High-frequency and harmonic components (or r
14、ipples) in the power supply output .10 4.3Test signal frequencies10 4.4Standard setting 11 4.4.1Standard input conditions for the EUT11 4.4.2Standard output conditions for the EUT11 4.4.3Standard setting of controls input terminals, and output terminals12 4.5Preconditioning12 4.6Measuring instrument
15、s.12 4.6.1Signal generator 12 4.6.2Filter14 4.6.3Level meter15 4.6.4Distortion meter .16 4.6.5Frequency meter17 4.6.6Group delay meter .17 4.6.7Analogue spectrum analyzer18 4.6.8Digital waveform monitor18 4.6.9Voltage amplifier19 4.6.10 Standard digital player.19 5Methods of measurement (digital-in/
16、analogue-out)19 5.1Input/output characteristics19 5.1.1Maximum output amplitude 19 5.1.2Gain difference between channels and tracking error.20 5.2Frequency characteristics20 5.2.1Frequency response 20 5.2.2Group delay (phase linearity).20 5.3Noise characteristics .20 5.3.1Signal-to-noise ratio (idle
17、 channel noise) .20 5.3.2Dynamic range.21 5.3.3Out-of-band noise ratio 21 5.3.4Channel separation21 5.4Distortion characteristics .21 5.4.1Level non-linearity .21 5.4.2Distortion and noise.22 5.4.3Intermodulation22 Copyright International Electrotechnical Commission Provided by IHS under license wit
18、h IECLicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/09/2007 07:56:23 MSTNo reproduction or networking permitted without license from IHS -,-,- 61606-1 IEC:2003(E) 3 6Methods of measurement (analogue-in/digital-out)22 6.1Input/output characteristics22 6.1.1Analogue to digital
19、 level calibration22 6.1.2Maximum allowable input amplitude.22 6.1.3Gain difference between channel and tracking error.23 6.2Frequency characteristics23 6.2.1Frequency response 23 6.2.2Group delay.23 6.3Noise characteristics .24 6.3.1Signal-to-noise ratio (idle channel noise) .24 6.3.2Dynamic range.
20、24 6.3.3Folded noise24 6.3.4Cross-talk 24 6.3.5Channel separation25 6.4Distortion characteristics .25 6.4.1Level non-linearity .25 6.4.2Distortion and noise.25 6.4.3Intermodulation25 Figure 1 Analogue test signal waveform .13 Figure 2 Digital test signal waveform14 Table 1 Actual frequencies used in
21、 the measurement.10 Table 2 Impulse conditions and measuring range.17 Copyright International Electrotechnical Commission Provided by IHS under license with IECLicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/09/2007 07:56:23 MSTNo reproduction or networking permitted without
22、license from IHS -,-,- 4 61606-1 IEC:2003(E) INTERNATIONAL ELECTROTECHNICAL COMMISSION _ AUDIO AND AUDIOVISUAL EQUIPMENT DIGITAL AUDIO PARTS BASIC MEASUREMENT METHODS OF AUDIO CHARACTERISTICS Part 1: General FOREWORD 1)The International Electrotechnical Commission (IEC) is a worldwide organization f
23、or 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 publi
24、shes 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 p
25、articipate 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 agreemen
26、t 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 Public
27、ations 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 fo
28、r 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 correspond
29、ing 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 e
30、dition 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 d
31、irect 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 indispen
32、sable 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 61606-1 ha
33、s been prepared by IEC technical committee 100: Audio, video and multimedia systems and equipment. IEC 61606-2 and this standard cancel and replace IEC 61606 (1997). This first edition of IEC 61606-1 constitutes a technical revision. The text of this standard is based on the following documents: FDI
34、SReport on voting 100/694/FDIS100/715/RVD 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. Copyright International Electrotechnical
35、Commission Provided by IHS under license with IECLicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/09/2007 07:56:23 MSTNo reproduction or networking permitted without license from IHS -,-,- 61606-1 IEC:2003(E) 5 IEC 61606 consists of the following parts under the general title
36、Audio and audiovisual equipment Digital audio parts Basic measurement methods of audio characteristics: Part 1: General Part 2: Consumer use Part 3: Professional use1 The committee has decided that the contents of this publication will remain unchanged until 2006. At this date, the publication will
37、be reconfirmed; withdrawn; replaced by a revised edition, or amended. A bilingual edition may be issued at a later date. 1 Under consideration. Copyright International Electrotechnical Commission Provided by IHS under license with IECLicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resal
38、e, 03/09/2007 07:56:23 MSTNo reproduction or networking permitted without license from IHS -,-,- 6 61606-1 IEC:2003(E) AUDIO AND AUDIOVISUAL EQUIPMENT DIGITAL AUDIO PARTS BASIC MEASUREMENT METHODS OF AUDIO CHARACTERISTICS Part 1: General 1 Scope This part of IEC 61606 deals with the basic methods of
39、 measurement of the audio characteristics of the digital audio part of audio and audiovisual equipment for both consumer and professional use. The common measuring conditions and methods, described in this standard, are used for the measurement of the performance characteristics of equipment having
40、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 e
41、xamples. Methods specified in this standard are not applicable to systems incorporating bit-rate reduced digital audio signals that have data loss. This standard describes tests for equipment which has digital input with analogue output and analogue input with digital output. Future revisions of thi
42、s standard will cover digital-in/digital- out and analogue-in/analogue-out tests. This standard does not apply to power amplifiers. NOTE 1 A digital audio system having an analogue input and an analogue output with digital signal processing may have different characteristics from those of a pure ana
43、logue audio system due to sampling of the audio signal and performance of incorporated A/D and D/A converters. Measurement methods described in IEC 60268-3 may not give correct results when applied to a digital system. NOTE 2 The methods described are mostly based on sampling frequencies of 32 kHz a
44、nd higher. NOTE 3 For tests of those systems of digital-in digital-out, and analogue-in analogue-out test, refer to AES 17. NOTE 4 This standard is planned to provide the industry with a harmonized set of methods of measurements for digital audio equipment as described in the first edition of IEC 61
45、606 (1997), AES 17 and EIAJ CP-2i50. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments
46、) applies. IEC 60038, IEC standard voltages IEC 60107-5, Recommended methods of measurement on receivers for television broadcast transmissions Part 5: Electrical measurements on multichannel sound television receivers using the NICAM two-channel digital sound system IEC 60268-2, Sound system equipm
47、ent Part 2: Explanation of general terms and calculation methods IEC 60268-3, Sound system equipment Part 3: Amplifiers IEC 60958 (all parts), Digital audio interface Copyright International Electrotechnical Commission Provided by IHS under license with IECLicensee=IHS Employees/1111111001, User=Win
48、g, Bernie Not for Resale, 03/09/2007 07:56:23 MSTNo reproduction or networking permitted without license from IHS -,-,- 61606-1 IEC:2003(E) 7 IEC 61079-4, Methods of measurement on receivers for satellite broadcast transmissions in the 12 GHz band Part 4: Electrical measurements on sound/data decoder units for the digital sub-carrier NTSC system IEC 61079-5, Methods of measurement on receivers for sa