1、BSI Standards PublicationDigital audio interface Part 1: GeneralBS EN 60958-1:2008+A1:2014BS EN 60958-1:2008+A1:2014National forewordThis British Standard is the UK implementation of EN 60958-1:2008+A1:2014. It is identical to IEC 60958-1:2008, incorporating amendment 1:2014. It supersedes BS EN 609
2、58-1:2008, which is withdrawn.The start and finish of text introduced or altered by amendment is indicated in the text by tags. Tags indicating changes to IEC text carry the number of the IEC amendment. For example, text altered by IEC amendment 1 is indicated by !“.The UK participation in its prepa
3、ration was entrusted to Technical Committee EPL/100, Audio, video and multimedia systems and equipment.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are
4、responsible for its correct application. The British Standards Institution 2014. Published by BSI Standards Limited 2014ISBN 978 0 580 81622 2ICS 33.160.01Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of the St
5、andards Policy and Strategy Committee on 31 March 2009.Amendments/corrigenda issued since publicationDate Text affected30 September 2014 Implementation of IEC amendment 1:2014 with CENELEC endorsement A1:2014BRITISH STANDARDEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORMCENELEC European Committee
6、forElectrotechnicalStandardization Comit Europen de Normalisation ElectrotechniqueEuropisches Komitee fr Elektrotechnische NormungCentral Secretariat:rue de Stassart35, B - 1050 Brussels 2008 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELECmembers.Ref.
7、 No. EN 60958-1:2008 EICS 33.160.01English versionDigital audio interface -Part 1: General(IEC 60958-1:2008)Interface audionumrique -Partie 1: Gnralits(CEI 60958-1:2008)Digitalton-Schnittstelle -Teil 1: Allgemeines(IEC 60958-1:2008)This European Standard was approved by CENELEC on 2008-10-01. CENELE
8、C members are bound to complywith 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 bibliographical references concerning such national standards may be obtained onappli
9、cation to the Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any otherlanguage made by translation under the responsibility of a CENELEC member into its own language and notifiedto the Central Secretariat
10、 has the same status as the official versions.CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, theCzech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,Lithuania, Luxembourg, Malta, the Netherla
11、nds, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom.July 2014EN 60958-1:2008+A1- 2 -Foreword The text of document 100/1252/CDV, future edition 3 of IEC 60958-1, prepared by IEC TC 100, Audio,video and multimedia systems and equipment, was sub
12、mitted to the IEC-CENELEC parallel vote and wasapproved by CENELEC as EN 60958-1 o n 2008-10-01.This European Standard supersedes EN 60958-1:2004. It includes the following significant changes with respect to EN 60958-1:2004:Electrical and optical requirements are removed from EN 60958-3; they are s
13、pecified in EN 60958-1.The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identicalnational standard or by endorsement (dop) 2009-07-01 latest date by which the national standards conflictingwith the EN have to be withdrawn (dow)
14、2011-10-01Annex ZA has been added by CENELEC._Endorsement noticeThe text of the International Standard IEC 60958-1:2008 was approved by CENELEC as a EuropeanStandard without any modification.In the official version, for Bibliography, the following notes have to be added for the standards indicated:I
15、EC 60793-2 NOTE Harmonized as EN 60793-2:2008 (not modified).IEC 60794-2 NOTE Harmonized as EN 60794-2:2003 (not modified).IEC 60874-1 NOTE Harmonized as EN 60874-1:2007 (not modified).IEC 60958 NOTE Harmonized in EN 60958 series (not modified).IEC 61883-6 NOTE Harmonized as EN 61883-6:2005 (not mod
16、ified).IEC 61937-1 NOTE Harmonized as EN 61937-1:2007 (not modified).IEC 61937-2 NOTE Harmonized as EN 61937-2:2007 (not modified).IEC 61937-3 NOTE Harmonized as EN 61937-3:2003 (not modified).IEC 61937-4 NOTE Harmonized as EN 61937-4:2003 (not modified).IEC 61937-5 NOTE Harmonized as EN 61937-5:200
17、6 (not modified).IEC 61937-6 NOTE Harmonized as EN 61937-6:2006 (not modified).IEC 61937-7 NOTE Harmonized as EN 61937-7:2005 (not modified).IEC 61937-8 NOTE Harmonized as EN 61937-8:2007 (not modified).IEC 61937-9 NOTE Harmonized as EN 61937-9:2007 (not modified).IEC 62105 NOTE Harmonized as EN 621
18、05:2002 (not modified)._BS EN 60958-1:2008+A1:2014 EN 60958-1:2008+A1:2014 (E)The text of document 100/2164/CDV, future IEC 60958-1:2008/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 60958-1
19、:2008/A1:2014. The following dates are fixed: latest date by which the document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2015-03-03 latest date by which the national standards conflicting with the document have to be withdrawn (
20、dow) 2017-06-03 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 60958-1:
21、2008/A1:2014 was approved by CENELEC as a European Standard without any modification. In the official version, for Bibliography, the following notes have to be replaced for the standards indicated: IEC 60874-1 NOTE Harmonised as EN 60874-1. IEC 61937-3 NOTE Harmonised as EN 61937-3. In the official
22、version, for Bibliography, the following notes have to be deleted for the standards indicated: IEC 61937-4 NOTE Harmonised as EN 61937-4 IEC 61937-5 NOTE Harmonised as EN 61937-5. IEC 61937-6 NOTE Harmonised as EN 61937-6. IEC 61937-7 NOTE Harmonised as EN 61937-7. IEC 61937-8 NOTE Harmonised as EN
23、61937-8. IEC 61937-9 NOTE Harmonised as EN 61937-9. - 3 -Foreword to amendment A1BS EN 60958-1:2008+A1:2014 EN 60958-1:2008+A1:2014 (E)- 4-A nnex ZA(normative)Normative references to international publicationswith their corresponding European publications The following referenced documents are indis
24、p ensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenceddocument (including any amendments) applies.NOTE When an international publication has been modified by common modifications, indicated by
25、 (mod), the relevant EN/HDapplies.Publication Year Title EN/HD YearIEC 60268-11 - 1) Sound system equipment -Part 11: Application of connectors for the interconnection of sound system componentsHD 483.11 S319932)IEC 60874-17 - 1) Connectors for optical fibres and cables -Part 17: Sectional specifica
26、tion for fibre opticconnector - Type F-05 (friction lock)EN 60874-17 19972)IEC 60958-3-1) Digital audio interface -Part 3: Consumer applicationsEN 60958-320062)IEC 60958-4-1) Digital audio interface -Part 4: Professional applicationsEN 60958-420032)1) Undated reference. 2) Valid edition at date of i
27、ssue.BS EN 60958-1:2008+A1:2014 EN 60958-1:2008+A1:2014 (E) 4 CONTENTS1Scope.62Normative references.63Terms and definitions.64Interface format84.1Structure of format84.1.1Sub-frame format.84.1.2Frame format.94.2Channel coding.94.3Preambles.104.4Validity bit.115Channel status.115.1General.115.2Applic
28、ations.115.3General assignmentof the first and second channel statusbits.125.4Category code.126User data.146.1General.146.2Applications.146.2.1Professional use146.2.2Consumer use.147Electricalrequirement.147.1Consumer application147.1.1General.147.1.2Timing accuracy147.1.3Unbalanced line.157.2Profes
29、sional application188Optical requirements188.1Consumer application188.1.1Optical specification188.1.2Optical connector 198.2Professional applications.19Annex A(informative) The useof the validity bit20AnnexB (informative) Application documents and specifications21Annex C (informative) A relationship
30、 of the IEC 60958 series families22Annex D (informative)Transmissionof CD data other than linear PCM audio24AnnexE (informative) The IEC 60958 series conformant data format.25AnnexF (informative) Stream change26AnnexG (informative) Characteristics of optical connection.28Bibliography30Figure 1 Sub-f
31、rame format (linear PCM application).9Figure 2 Frame format.9Figure 3 Channel coding10BS EN 60958-1:2008+A1:2014 60958-1 IEC:2008+A1:2014(E) 5 Figure 4 Preamble M (shown as 11100010).11Figure 5 Simplified ex ample of the configuration ofthe circuit (unbalanced).15Figure 6 Rise and fall times.16Figur
32、e 7 Intrinsic jitter measurement filter16Figure 8 Eye diagram.17Figure 9 Receiverjitter tolerance template.17Figure 10 Basic optical connection.18Figure C.1 22Figure F.1 Audio source sand AV receiver model.26Figure F.2 Switching from linearPCM to non linear PCM.27Figure F.3 Switching from non linear
33、 PCM to linear PCM.27Figure F.4 Switching from non-linearPCM to non-linearPCM27Table 1 Preamble coding.10Table 2 Channel status data format.13Table B.1 Application documents and specifications21Table G.1 Characteristics of standard optical connection (opticalinterface).28Table G.2 Characteristics of
34、 optical transmitter (opticalinterface)28Table G.3 Characteristics of optical receiver(optical interface)29Table G.4 Characteristics of fibre optic cable.29Table G.5 Optical power budget for the link with plastic fibre.29!Relationships of the IEC 60958 families“!Table C.1 data_type values and applic
35、ation“23BS EN 60958-1:2008+A1:2014 60958-1 IEC:2008+A1:2014(E) 6 DIGITALAUDIO INTERFACE Part 1: General 1 Scope This part of IEC 60958 describes a serial, uni-directional, self-clocking interface for theinterconnection of digital audio equipm ent forconsumerand professional applications.It provides
36、the basic structure of the interface. Separate documents define items specific toparticular applications.The interface is primarily intended to carrymonophonic or stereophonic programmes,encoded using linear PCM and witha resolution of up to 24 bits per sample.When used for other purposes, the inter
37、face is able to carry audio data coded other than aslinear PCM coded audio samples. Provision is also made to allow the interface to carry datarelatedto computer softwareor signals coded usingnon-linearPCM. Theformat specification forthese applications is not partof thisstandard. The interface is in
38、tended foroperation at audio sampling frequencies of 32kHz and above.Auxiliary information is transmitted along with the programme.2 Normative referencesThe following referenced documents are indispensable for t he application of this document.For dated references, only the edition cited applies. Fo
39、r undated references, thelatesteditionof the referenced document(including any amendments) applies.IEC 60268-11, Sound system equipment Part 11: Application of connectors fortheinterconnection of sound system componentsIEC 60874-17, Connectors for optical fibres and cables Part 17: Sectional specifi
40、cation forfibre optic connector Type F-05 (frictionlock)IEC 60958-3, Digital audio interface Part 3: Consumer applicationsIEC 60958-4, Digital audio interface Part 4: Professional applications3 Terms and definitionsFor the purpose of this International Standard, the followingterms and definitions ap
41、ply.3.1sampling frequencyfrequency of the samples representing an audio signalNOTEWhen more than one signal is transmitted through the same interface, the sampling frequencies areidentical.BS EN 60958-1:2008+A1:2014 60958-1 IEC:2008+A1:2014(E) 7 3.2audio sample wordvalue of a digital audio sample; r
42、epresentation is linear in 2s complement bina ryformNOTE Positive numbers correspond to positive analogue voltages at the input of the analogue-to-digital converter(ADC).3.3auxiliary sample bitthefour least significant bits(LSBs) which can be assigned as auxiliary sample bitsand usedfor auxiliary in
43、formation when the number of audio sample bits in the main datafield is less than or equal to 203.4validity bit bit indicating whether the main data field bits in the sub-frame (time slots 4 to 27 or 8 to 27,dependingon the audio word length as described in 4.1.1) are reliable or not3.5channel statu
44、s the channel status carries,in a fixed format, information associated with each main data fieldchannel which is decodable by any interface userNOTE Examples of information to be carried in the channel status are: length of audio sample words, pre-emphasis, sampling frequency, time codes, alphanumer
45、ic source and destination codes.3.6user datathe user datachannel is provided to carry any other information3.7parity bit bitprovided topermit the detection of an odd number oferrors resulting frommalfunctions inthe interface 3.8preamblespecific patterns used forsynchronization NOTE There are three d
46、ifferent preambles (see 4.3).3.9sub-frame fixed structure used to carry information (see 4.1.14.1.1 and4.1.2)3.10 f rame sequence of two successive and associated sub-frames3.11 block group of 192 consecutive framesNOTEThe start of a block is designated by a special sub-frame preamble (see 4.3).3.12
47、 channel coding coding method by which the binary digits are represented for transmission through theinterface BS EN 60958-1:2008+A1:2014 60958-1 IEC:2008+A1:2014(E) 8 3.13 unit interval (UI)the shortest nominal time intervalin the coding scheme NOTEThere are 128 UI in a sample frame.3.14 interface
48、jitterdeviation in the timing of interface data transitions (z ero crossings) when compared with anideal clock 3.15 intrinsic jitter output interface jitter of a device that is either free-running or issynchronized to a jitter-freereference 3.16 jitter gainratio of the amplitude of jitter components
49、 at the output to th eir amplitude at the synchronization input to the device under test4 Interface format4.1Structure of format4.1.1 Sub-frameformatEach sub-frame is divided into 32 time slots,numbered from 0 to 31 (see Figure 1). Time slots 0 to 3 (preambles) carry one of the three permitted preambles (see 4.1.2 and 4.3;also see Figure 2).Tim eslots 4 to 27 (main data field)carry the audio sample word in linear 2s complementrepresentation. The most significant bit
