1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 62537:2010Interface for loudspeakers withdigital input signals based onIEC 60958BS EN 62537:2010 BRITISH STANDARDNational forewordThis British Standard is the UK implementa
2、tion of EN 62537:2010. Itis identical to IEC 62537:2010.The UK participation in its preparation was entrusted to TechnicalCommittee EPL/100, Audio, video and multimedia systems andequipment.A list of organizations represented on this committee can beobtained on request to its secretary.This publicat
3、ion does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2010ISBN 978 0 580 61960 1ICS 33.160.30; 33.160.50; 35.040; 35.200Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was
4、 published under the authority of theStandards Policy and Strategy Committee on 31 August 2010.Amendments issued since publicationDate Text affectedBS EN 62537:2010EUROPEAN STANDARD EN 62537 NORME EUROPENNE EUROPISCHE NORM July 2010 CENELEC European Committee for Electrotechnical Standardization Com
5、it Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Management Centre: Avenue Marnix 17, B - 1000 Brussels 2010 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 62537:2010 E ICS 33.160.30;
6、35.040 English version Interface for loudspeakers with digital input signals based on IEC 60958 (IEC 62537:2010) Interface pour haut-parleurs avec signaux dentre numriques bass sur la CEI 60958 (CEI 62537:2010) Schnittstelle fr Lautsprecher mit digitalen Eingangssignalen nach IEC 60958 (IEC 62537:20
7、10) This European Standard was approved by CENELEC on 2010-07-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographi
8、cal references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a
9、CENELEC member into its own language and notified to the Central Secretariat 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, France, Germany, Gree
10、ce, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 62537:2010EN 62537:2010 - 2 - Foreword The text of document 100/1433/CDV, future edition 1 of I
11、EC 62537, prepared by IEC TC 100, Audio, video and multimedia systems and equipment, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 62537 on 2010-07-01. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rig
12、hts. CEN and CENELEC shall not be held responsible for identifying any or all such patent rights. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2011-04-01 latest date by whi
13、ch the national standards conflicting with the EN have to be withdrawn (dow) 2013-07-01 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 62537:2010 was approved by CENELEC as a European Standard without any modification. In the official version, for
14、 Bibliography, the following note has to be added for the standard indicated: IEC 62379 series NOTE Harmonized in EN 62379 series (not modified). _ BS EN 62537:2010- 3 - EN 62537:2010 Annex ZA (normative) Normative references to international publications with their corresponding European publicatio
15、ns 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) applies. NOTE When an international publication has bee
16、n modified by common modifications, indicated by (mod), the relevant EN/HD applies. Publication Year Title EN/HD Year IEC 60958 Series Digital audio interface EN 60958 Series IEC 60958-4 - Digital audio interface - Part 4: Professional applications (TA4) EN 60958-4 - - 2001 The Complete MIDI 1.0 Det
17、ailed Specification v96.1 - - BS EN 62537:2010 2 62537 IEC:2010(E) 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 General 8 4.1 Feature set8 4.2 Audio formats9 5 Control data channel us
18、ing the U-bit of IEC 60958-4 9 5.1 General .9 5.2 Formatting.9 5.3 Mode indication .9 5.4 Subchannel usage.10 6 Loudspeaker command set.10 6.1 General .10 6.2 Device identification and configuration 10 6.2.1 Device identification 10 6.2.2 Auto configuration .11 6.3 Parameters .11 6.3.1 Parameter ide
19、ntification.11 6.3.2 Value range.11 6.3.3 Setting a parameter .12 6.3.4 Device addressing .12 6.3.5 Timed parameter setting (optional) 12 6.4 Optional alternative parameter setting through NRPN and/or MIDI controllers .12 6.4.1 General .12 6.4.2 NRPN and MIDI continuous controller association .12 6.
20、5 Control numbers13 6.5.1 General .13 6.5.2 MIDI channel assignment (control number 0, low resolution, optional) .13 6.5.3 Volume (control number 1, high resolution, mandatory) .14 6.5.4 Volume ramp (control number 2, high resolution, optional) 14 6.5.5 Time delay (control number 3, high resolution,
21、 optional) 14 6.5.6 Sample delay (control number 4, high resolution, optional) 14 6.5.7 Volume calibration (control number 5, high resolution, optional) 14 6.5.8 Panning (control number 6, high resolution, optional) 14 6.5.9 Phase left (control number 7, binary, optional).14 6.5.10 Phase right (cont
22、rol number 8, binary, optional).15 6.5.11 Dimming (control number 9, binary, optional).15 6.5.12 Indicator (control number 10, binary, optional).15 6.5.13 High-pass frequency (control number 11, high resolution, optional) .15 6.5.14 High-pass filter in/out (control number 12, binary, optional) .15 6
23、.5.15 Low-pass frequency (control number 13, high resolution, optional) 15 6.5.16 Low-pass filter in/out (control number 14, binary, optional)15 BS EN 62537:201062537 IEC:2010(E) 3 6.6 Additional MIDI messages .15 6.6.1 General .15 6.6.2 All off and restore commands (mandatory).16 6.6.3 Program chan
24、ge (optional) 16 7 Power transmission and backward channel (optional).16 7.1 Power transmission .16 7.2 Backwards data channel17 7.2.1 General .17 7.2.2 Protocol.17 7.2.3 Simultaneous reception .17 Annex A (informative) Security aspects18 Annex B (informative) Signal routing21 Annex C (informative)
25、Application examples 23 Annex D (informative) Implementation using current hardware.25 Bibliography26 BS EN 62537:2010 4 62537 IEC:2010(E) INTERNATIONAL ELECTROTECHNICAL COMMISSION _ INTERFACE FOR LOUDSPEAKERS WITH DIGITAL INPUT SIGNALS BASED ON IEC 60958 FOREWORD 1) The International Electrotechnic
26、al 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 e
27、nd 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 Com
28、mittee 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 a
29、ccordance 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
30、 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 re
31、sponsible 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 diverg
32、ence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity assessment services and, in some areas, access to IEC ma
33、rks of conformity. IEC is not responsible for any services carried out by independent certification bodies. 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 exper
34、ts 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 Pu
35、blication 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 Pu
36、blication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 62537 has been prepared by technical area 4: Digital system interfaces and protocols, of IEC technical committee 100: Audio, video and multimedia
37、 systems and equipment. The text of this standard is based on the following documents: CDV Report on voting 100/1433/CDV 100/1700/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. BS EN 62537:201062537 IEC:2010(E)
38、5 This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. The committee has decided that the contents of this publication will remain unchanged until the stability date indicated on the IEC web site under “http:/webstore.iec.ch“ in the data related to the specific public
39、ation. 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. BS EN 62537:2010 6 62537 IEC:2010(E) INTRODUCTION The IEC 60958 interface allows transmission of 2-channel digital au
40、dio with up to 24 bit word length at 192 kHz sampling rate. This is adequate for loudspeakers, however, there are additional needs in practice that require standardisation, which go beyond whats currently defined in IEC 60958. This standard is aimed at fulfilling those needs. IEC 60958 features a us
41、er bit that can form the basis of a control data channel that addresses those additional requirements. The format of this user bit data channel is based on the existing MIDI standard. Beyond the needs given in IEC 60958, the following offers an exemplary, but incomplete list of of what a digital lou
42、dspeaker interface should support: Remote control of operating parameters of the loudspeaker. Remote power-on of the loudspeaker preferably without requiring standby power in the loudspeaker. Remote configuration of loudspeaker, for example crossover configuration, or firmware update. Remote supervi
43、sion of loudspeakers, for example chassis temperature or amplifier integrity. Remote identification of loudspeakers, to allow auto-configuration of the entire system. Control of individual or groups of loudspeakers through a single interface. Remote control of Audio System through remote control rec
44、eiver mounted in loudspeaker enclosure (allowing Audio System to be placed out of sight). Extensions to allow for future applications. NOTE 1 Level and mute control in the loudspeaker is preferred over digital attenuation by the signal source, as this allows the full audio data word length for the f
45、ilter network; level should be controlled at the last stage in front of power amplifiers. In this case, the advantage is that the full audio word length of the given format is available at any time and at any volume setting. Especially, if a fully digitally constructed crossover network has been imp
46、lemented, more precise arithmetical operations can also be made at low volumes. Volume control can thus be carried out after the crossover network or even after the relevant final amplifier. Even under the most unfavourable conditions (digital pre-attenuation and analogue gain) the filters and contr
47、ollers receive the full audio word width under all operating conditions (ideal state). NOTE 2 Not all of the listed features are required in all applications. It should therefore be up to the implementer to select from this standard the parts that are required in his application, and omit the unnece
48、ssary features. See Annex D for application examples. BS EN 62537:201062537 IEC:2010(E) 7 INTERFACE FOR LOUDSPEAKERS WITH DIGITAL INPUT SIGNALS BASED ON IEC 60958 1 Scope This International Standard specifies the requirements for a digital loudspeaker interface based on the IEC 60958 series of stand
49、ards and the MIDI specification. It maximizes flexibility and value by combining these previously separate standards. Together, the two standards provide a simple and flexible digital interface for loudspeakers. Examples for applications of the interface can be found in Annex C of this standard. 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,
