BS EN 60958-1-2008 Digital audio interface - General《数字音频接口 总则》.pdf

1、Digital audio interface Part 1: GeneralBS EN 60958-1:2008raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI British StandardsLicensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 06/07/2009 03:56, Uncontrolled Copy, (c) BSINational forewordThis Brit

2、ish Standard is the UK implementation of EN 60958-1:2008. It isidentical to IEC 60958-1:2008. It supersedes BS EN 60958-1:2004 which iswithdrawn.The UK participation in its preparation was entrusted to Technical CommitteeEPL/100, Audio, video and multimedia systems and equipment.A list of organizati

3、ons represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisions of acontract. Users are responsible for its correct application. BSI 2009ISBN 978 0 580 57331 6ICS 33.160.01BRITISH STANDARDBS EN 60958-1:2008Complia

4、nce with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of the StandardsPolicy and Strategy Committee on Amendments issued since publicationAmd. No. Date Text affectedMarch 200931Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STAN

5、DARDS, 06/07/2009 03:56, Uncontrolled Copy, (c) BSIEUROPEAN STANDARD EN 60958-1 NORME EUROPENNE EUROPISCHE NORM October 2008 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secret

6、ariat: rue de Stassart 35, B - 1050 Brussels 2008 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60958-1:2008 E ICS 33.160.01 Supersedes EN 60958-1:2004English version Digital audio interface - Part 1: General (IEC 60958-1:2008)

7、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. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions

8、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 on application to the Central Secretariat or to any CENELEC member. This European Standard exists in three of

9、ficial versions (English, French, German). A version in any other language made by translation under the responsibility of a 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 co

10、mmittees of Austria, Belgium, Bulgaria, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the U

11、nited Kingdom. Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 06/07/2009 03:56, Uncontrolled Copy, (c) BSIEN 60958-1:2008 - 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 submitte

12、d to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60958-1 on 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 spec

13、ified 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 identical national standard or by endorsement (dop) 2009-07-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow)

14、2011-10-01 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 60958-1:2008 was approved by CENELEC as a European Standard without any modification. In the official version, for Bibliography, the following notes have to be added for the standards indic

15、ated: IEC 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 61883-6:20

16、05 (not modified). 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 a

17、s EN 61937-5:2006 (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

18、 Harmonized as EN 62105:2002 (not modified). _ Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 06/07/2009 03:56, Uncontrolled Copy, (c) BSI- 3 - EN 60958-1:2008 Annex ZA (normative) Normative references to international publications with their corresponding European publications The following

19、 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 been modified by co

20、mmon modifications, indicated by (mod), the relevant EN/HD applies. Publication Year Title EN/HD Year IEC 60268-11 -1)Sound system equipment - Part 11: Application of connectors for the interconnection of sound system componentsHD 483.11 S3 19932)IEC 60874-17 -1)Connectors for optical fibres and cab

21、les - Part 17: Sectional specification for fibre optic connector - Type F-05 (friction lock) EN 60874-17 19972)IEC 60958-3 -1)Digital audio interface - Part 3: Consumer applications EN 60958-3 20062)IEC 60958-4 -1)Digital audio interface - Part 4: Professional applications EN 60958-4 20032)1)Undated

22、 reference. 2)Valid edition at date of issue. Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 06/07/2009 03:56, Uncontrolled Copy, (c) BSI 2 60958-1 IEC:2008(E) CONTENTS 1 Scope.6 2 Normative references .6 3 Terms and definitions .6 4 Interface format 8 4.1 Structure of format 8 4.1.1 Sub-fra

23、me format.8 4.1.2 Frame format.9 4.2 Channel coding .9 4.3 Preambles.10 4.4 Validity bit .11 5 Channel status .11 5.1 General .11 5.2 Applications.11 5.3 General assignment of the first and second channel status bits.12 5.4 Category code.12 6 User data .14 6.1 General .14 6.2 Applications.14 6.2.1 P

24、rofessional use14 6.2.2 Consumer use .14 7 Electrical requirement.14 7.1 Consumer application14 7.1.1 General .14 7.1.2 Timing accuracy 14 7.1.3 Unbalanced line.15 7.2 Professional application 18 8 Optical requirements 18 8.1 Consumer application18 8.1.1 Optical specification 18 8.1.2 Optical connec

25、tor 19 8.2 Professional applications.19 Annex A (informative) The use of the validity bit 20 Annex B (informative) Application documents and specifications21 Annex C (informative) A relationship of the IEC 60958 series families22 Annex D (informative) Transmission of CD data other than linear PCM au

26、dio 23 Annex E (informative) The IEC 60958 series conformant data format.24 Annex F (informative) Stream change 25 Annex G (informative) Characteristics of optical connection.27 Bibliography29 Figure 1 Sub-frame format (linear PCM application).9 Figure 2 Frame format .9 Figure 3 Channel coding 10 BS

27、 EN 60958-1:2008Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 06/07/2009 03:56, Uncontrolled Copy, (c) BSI60958-1 IEC:2008(E) 3 Figure 4 Preamble M (shown as 11100010) .11 Figure 5 Simplified example of the configuration of the circuit (unbalanced).15 Figure 6 Rise and fall times .16 Figure

28、 7 Intrinsic jitter measurement filter 16 Figure 8 Eye diagram.17 Figure 9 Receiver jitter tolerance template.17 Figure 10 Basic optical connection.18 Figure C.1 A relationship of IEC 60958 families .22 Figure F.1 Audio sources and AV receiver model.25 Figure F.2 Switching from linear PCM to non lin

29、ear PCM .26 Figure F.3 Switching from non linear PCM to linear PCM .26 Figure F.4 Switching from non-linear PCM to non-linear PCM 26 Table 1 Preamble coding .10 Table 2 Channel status data format .13 Table B.1 Application documents and specifications 21 Table G.1 Characteristics of standard optical

30、connection (optical interface) .27 Table G.2 Characteristics of optical transmitter (optical interface)27 Table G.3 Characteristics of optical receiver (optical interface)28 Table G.4 Characteristics of fibre optic cable.28 Table G.5 Optical power budget for the link with plastic fibre .28 BS EN 609

31、58-1:2008Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 06/07/2009 03:56, Uncontrolled Copy, (c) BSI 6 60958-1 IEC:2008(E) DIGITAL AUDIO INTERFACE Part 1: General 1 Scope This part of IEC 60958 describes a serial, uni-directional, self-clocking interface for the interconnection of digital au

32、dio equipment for consumer and professional applications. It provides the basic structure of the interface. Separate documents define items specific to particular applications. The interface is primarily intended to carry monophonic or stereophonic programmes, encoded using linear PCM and with a res

33、olution of up to 24 bits per sample. When used for other purposes, the interface is able to carry audio data coded other than as linear PCM coded audio samples. Provision is also made to allow the interface to carry data related to computer software or signals coded using non-linear PCM. The format

34、specification for these applications is not part of this standard. The interface is intended for operation at audio sampling frequencies of 32kHz and above. Auxiliary information is transmitted along with the programme. 2 Normative references The following referenced documents are indispensable for

35、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. IEC 60268-11, Sound system equipment Part 11: Application of connectors for the interconnection of sound s

36、ystem components IEC 60874-17, Connectors for optical fibres and cables Part 17: Sectional specification for fibre optic connector Type F-05 (friction lock) IEC 60958-3, Digital audio interface Part 3: Consumer applications IEC 60958-4, Digital audio interface Part 4: Professional applications 3 Ter

37、ms and definitions For the purpose of this International Standard, the following terms and definitions apply. 3.1 sampling frequency frequency of the samples representing an audio signal NOTE When more than one signal is transmitted through the same interface, the sampling frequencies are identical.

38、 BS EN 60958-1:2008Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 06/07/2009 03:56, Uncontrolled Copy, (c) BSI60958-1 IEC:2008(E) 7 3.2 audio sample word value of a digital audio sample; representation is linear in 2s complement binary form NOTE Positive numbers correspond to positive analog

39、ue voltages at the input of the analogue-to-digital converter (ADC). 3.3 auxiliary sample bit the four least significant bits (LSBs) which can be assigned as auxiliary sample bits and used for auxiliary information when the number of audio sample bits in the main data field is less than or equal to

40、20 3.4 validity bit bit indicating whether the main data field bits in the sub-frame (time slots 4 to 27 or 8 to 27, depending on the audio word length as described in 4.1.1) are reliable or not 3.5 channel status the channel status carries, in a fixed format, information associated with each main d

41、ata field channel which is decodable by any interface user NOTE Examples of information to be carried in the channel status are: length of audio sample words, pre-emphasis, sampling frequency, time codes, alphanumeric source and destination codes. 3.6 user data the user data channel is provided to c

42、arry any other information 3.7 parity bit bit provided to permit the detection of an odd number of errors resulting from malfunctions in the interface 3.8 preamble specific patterns used for synchronization NOTE There are three different preambles (see 4.3). 3.9 sub-frame fixed structure used to car

43、ry information (see 4.1.14.1.1 and 4.1.2) 3.10 frame sequence of two successive and associated sub-frames 3.11 block group of 192 consecutive frames NOTE The start of a block is designated by a special sub-frame preamble (see 4.3). 3.12 channel coding coding method by which the binary digits are rep

44、resented for transmission through the interface BS EN 60958-1:2008Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 06/07/2009 03:56, Uncontrolled Copy, (c) BSI 8 60958-1 IEC:2008(E) 3.13 unit interval (UI) the shortest nominal time interval in the coding scheme NOTE There are 128 UI in a sampl

45、e frame. 3.14 interface jitter deviation in the timing of interface data transitions (zero crossings) when compared with an ideal clock 3.15 intrinsic jitter output interface jitter of a device that is either free-running or is synchronized to a jitter-free reference 3.16 jitter gain ratio of the am

46、plitude of jitter components at the output to their amplitude at the synchronization input to the device under test 4 Interface format 4.1 Structure of format 4.1.1 Sub-frame format Each sub-frame is divided into 32 time slots, numbered from 0 to 31 (see Figure 1). Time slots 0 to 3 (preambles) carr

47、y one of the three permitted preambles (see 4.1.2 and 4.3; also see Figure 2). Time slots 4 to 27 (main data field) carry the audio sample word in linear 2s complement representation. The most significant bit (MSB) is carried by time slot 27. When a 24-bit coding range is used, the LSB is in time sl

48、ot 4 (see Figure 1). When a 20-bit coding range is used, time slots 8 to 27 carry the audio sample word with the LSB in time slot 8. Time slots 4 to 7 may be used for other applications. Under these circumstances, the bits in the time slots 4 to 7 are designated auxiliary sample bits (see Figure 1).

49、 If the source provides fewer bits than the interface allows (either 20 or 24), the unused LSBs are set to a logical “0“. For a non-linear PCM audio application or a data application the main data field may carry any other information. Time slot 28 (validity bit) carries the validity bit associated with the main data field (see 4.4). Time slot 29 (user data bit) carries 1 bit of the user data channel associated with the main data field ch