1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationCommon control interface fornetworked digital audio andvideo products Part 2: AudioBS EN 62379-2:2009National forewordThis British Standard is the UK implementation of EN 62379-2
2、:2009. It isidentical to IEC 62379-2:2008.The UK participation in its preparation was entrusted to Technical CommitteeEPL/100, Audio, video and multimedia systems and equipment.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not
3、purport to include all the necessary provisions of acontract. Users are responsible for its correct application. BSI 2010ISBN 978 0 580 59627 8ICS 33.160.01Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of the S
4、tandardsPolicy and Strategy Committee on 31 January 2010Amendments issued since publicationAmd. No. Date Text affectedBRITISH STANDARDBS EN 62379-2:2009EUROPEAN STANDARD EN 62379-2 NORME EUROPENNE EUROPISCHE NORM August 2009 CENELEC European Committee for Electrotechnical Standardization Comit Europ
5、en de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: Avenue Marnix 17, B - 1000 Brussels 2009 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 62379-2:2009 E ICS 33.160.01 Engli
6、sh version Common control interface for networked digital audio and video products - Part 2: Audio (IEC 62379-2:2008) Interface de commande commun destin aux produits audio et vido numriques connects en rseau - Partie 2: Audio (CEI 62379-2:2008) Gemeinsame Steuerschnittstelle fr netzwerkbetriebene d
7、igitale Audio- und Videogerte - Teil 2: Audio (IEC 62379-2:2008) This European Standard was approved by CENELEC on 2009-07-01. 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 stand
8、ard 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 official versions (English, French, German). A version in any othe
9、r 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 committees of Austria, Belgium, Bulgaria, Cyprus, the Czech Republ
10、ic, 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 United Kingdom. BS EN 62379-2:2009EN 62379-2:2009 - 2 - Foreword
11、The text of document 100/1405/FDIS, future edition 1 of IEC 62379-2, prepared by technical area 4, Digital system interfaces and protocols, of 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 62379-2 on 20
12、09-07-01. 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) 2010-04-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2012-07-01
13、Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 62379-2:2008 was approved by CENELEC as a European Standard without any modification. _ BS EN 62379-2:2009- 3 - EN 62379-2:2009 Annex ZA (normative) Normative references to international publications
14、with their corresponding European publications 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. NO
15、TE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. Publication Year Title EN/HD Year IEC 62379-1 2007 Common control interface for networked digital audio and video products - Part 1: General EN 62379-1 2007 AES3 2003 AES s
16、tandard for digital audio engineering - Serial transmission format for two-channel linearly represented digital audio data - - AES10 2008 AES recommended practice for digital audio engineering - Serial Multichannel Audio Digital Interface (MADI) - - AES50 2005 AES standard for digital audio engineer
17、ing - High-resolution multi-channel audio interconnection - - ITU-T Recommendation G.711 -1)Pulse code modulation (PCM) of voice frequencies - - ITU-T Recommendation G.722 -1)7 kHz audio-coding within 64 kbit/s - - ITU-T Recommendation J.41 -1)Characteristics of equipment for the coding of analogue
18、high quality sound programme signals for transmission on 384 kbit/s channels - - ITU-T Recommendation J.57 -1) Transmission of digital studio quality sound signals over H1 channels - - 1)Undated reference. BS EN 62379-2:2009 2 62379-2 IEC:2008(E) CONTENTS INTRODUCTION.6 1 Scope.7 2 Normative referen
19、ces .7 3 Terms, definitions and abbreviations 7 3.1 Abbreviations 7 4 Audio format definitions8 4.1 Audio signal format definitions.8 4.1.1 Audio parameters 8 4.1.2 Audio signal formats9 4.2 Audio transport format definitions 12 4.3 Audio metadata format definitions .12 5 MIB definitions for audio b
20、locks 13 5.1 General .13 5.2 Type definitions.13 5.2.1 Textual conventions.13 5.2.2 Sequences 15 5.3 Audio port and associated managed object type definitions .17 5.3.1 Generic port functionality.17 5.3.2 AES3 ancillary data .18 5.3.3 Phantom power .19 5.3.4 Audio locked to reference 19 5.4 Other au
21、dio block and associated managed object type definitions20 5.4.1 Audio mixer blocks 20 5.4.2 Audio crosspoint blocks.23 5.4.3 Audio clip player blocks.26 5.4.4 Audio limiter blocks .29 5.4.5 Audio converter blocks 31 5.4.6 Audio level alarm blocks32 6 Status broadcasts.34 6.1 General .34 6.2 Type de
22、finitions.34 6.2.1 Textual conventions.34 6.2.2 Sequences 34 6.3 Audio formats mapping34 6.3.1 audioFormatsMapTable .35 6.3.2 audioFormatsMapEntry35 6.3.3 afmNumber35 6.3.4 afmFormat.35 6.4 Page formats.35 6.4.1 Audio port page .35 6.4.2 AES3 ancillary data page 35 6.4.3 Audio mixer page.36 6.4.4 Au
23、dio crosspoint page .36 6.4.5 Audio clip player page .37 6.4.6 Audio limiter page37 BS EN 62379-2:200962379-2 IEC:2008(E) 3 6.4.7 Audio converter page 38 6.4.8 Audio level alarm page 38 6.5 Page groups39 6.5.1 audioPorts.39 6.5.2 standardAudioBlocks.39 6.5.3 audioAlarms.40 Annex A (informative) Mach
24、ine-readable audio format definitions 41 Annex B (informative) Machine-readable audio block definitions 56 Annex C (informative) Machine-readable status page group definitions74 Annex D (informative) Machine-readable status page MIB definitions 75 Annex E (informative) Worked examples77 Annex F (inf
25、ormative) Tree of example audio formats 86 Figure 1 Audio port blocks .17 Figure 2 Audio mixer block.21 Figure 3 Audio crosspoint block .23 Figure 4 Audio clip player block .26 Figure 5 Audio limiter block29 Figure 6 Audio converter block.31 Figure 7 Audio level alarm block 32 Table 1 Managed object
26、s for audio ports .17 Table 2 Managed objects for AES3 ancillary data 18 Table 3 Managed objects for phantom power .19 Table 4 Managed objects for audio locked .20 Table 5 Managed objects for audio mixer blocks21 Table 6 Managed objects for audio crosspoint blocks 23 Table 7 Managed objects for audi
27、o clip player blocks.27 Table 8 Managed objects for audio limiter blocks.30 Table 9 Managed objects for audio converter blocks31 Table 10 Managed objects for audio level alarm blocks33 Table 11 Managed objects for audio format mappings35 Table 12 Status entries for audio port page35 Table 13 Status
28、entries for AES3 ancillary data page.36 Table 14 Status entries for audio mixer page .36 Table 15 Status entries for audio crosspoint page37 Table 16 Status entries for audio clip player page37 Table 17 Status entries for audio limiter page 38 Table 18 Status entries for audio converter page .38 Tab
29、le 19 Status entries for audio level alarm page.39 BS EN 62379-2:2009 6 62379-2 IEC:2008(E) INTRODUCTION IEC 62379 specifies the common control interface, a protocol for managing equipment which conveys audio and/or video across digital networks. This part of IEC 62379 specifies those aspects that a
30、re specific to audio equipment. An introduction to the common control interface is given in IEC 62739-1. BS EN 62379-2:200962379-2 IEC:2008(E) 7 COMMON CONTROL INTERFACE FOR NETWORKED DIGITAL AUDIO AND VIDEO PRODUCTS Part 2: Audio 1 Scope This part of IEC 62379 specifies aspects of the common contro
31、l interface of IEC 62379-1 that are specific to audio. 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 (includ
32、ing any amendments) applies. AES3-2003, AES standard for digital audio Digital input-output interfacing Serial transmission format for two-channel linearly represented digital audio data AES10-2003, AES recommended practice for digital audio engineering Serial multichannel audio digital interface (M
33、ADI) AES50-2005, AES standard for digital audio engineering High-resolution multi-channel audio interconnection (HRMAI) IEC 62379-1:2007, Common control interface for networked audio and video products Part 1: General ITU-T Recommendation G.711, Pulse code modulation (PCM) of voice frequencies ITU-T
34、 Recommendation G.722, 7kHz audio-coding within 64 kbit/s ITU-T Recommendation J.41, Characteristics of equipment for the coding of analogue high quality sound programme signals for transmission on 384 kbit/s channels ITU-T Recommendation J.57, Transmission of digital studio quality sound signals ov
35、er H1 channels 3 Terms, definitions and abbreviations For the purposes of this document, the terms and definitions given in IEC 62379-1 apply along with the following abbreviations. 3.1 Abbreviations 3.1.1 pulse code modulation PCM 3.1.2 motion pictures expert group MPEG BS EN 62379-2:2009 8 62379-2
36、 IEC:2008(E) 3.1.3 advanced audio coding AAC 4 Audio format definitions 4.1 Audio signal format definitions At any point in the audio signal chain, the audio data will be in a particular format. For management purposes, the format shall be identified by an object identifier, either a “common control
37、 interface standard” object identifier defined in this standard or an object identifier defined elsewhere. NOTE Permitting audio format identifiers to be defined outside this standard allows use of proprietary formats within the standard protocol and also allows industry standard formats to emerge t
38、hat may eventually be incorporated into future revisions of this standard. 4.1.1 Audio parameters 4.1.1.1 General The definitions in 4.1.2 make reference to parameters which provide additional information about the format. These parameters shall be mapped to sub-identifier values as specified in the
39、 other subclauses of 4.1.1. Any parameter may be unspecified. The sub-identifier values shall be appended to the object identifiers as additional arcs, in the order in which the parameters are listed in the relevant subclause of 4.1.2; except that if a parameter is unspecified and either it is the l
40、ast parameter or all subsequent parameters are also unspecified, then it shall be omitted. NOTE For all parameters, “unspecified“ is coded as zero, so this rule ensures that the OID does not end with a zero arc. EXAMPLE: If the last two parameters are bit depth and sampling frequency, then 16-bit 48
41、kHz would be coded as .16.48000, 16-bit (with sampling frequency unspecified) as .16, and 48kHz (with bit depth unspecified) as .0.48000. 4.1.1.2 Channel arrangement The sub-identifier for channel arrangement shall be a value of the following type: ChannelArrangement := INTEGER unspecified (0), disc
42、reteMono (1), stereo (2), jointStereo (3), surround (4), surroundWithDownmix (5) (unspecified surroundWithDownmix) discreteMono shall indicate that each channel (if there is more than one) is a separate audio signal. stereo should only be used with an even number of channels, and shall indicate that
43、 each pair of channels (if there is more than one pair) is a separate stereo audio signal, with the first channel of the pair being the left channel. jointStereo should only be used with an even number of channels, and shall indicate that each pair of channels (if there is more than one pair) is a s
44、eparate stereo audio signal, with the first channel of the pair being the M channel and the second the S channel. BS EN 62379-2:200962379-2 IEC:2008(E) 9 surround and surroundWithDownmix should only be used with 3 to 8 channels (inclusive), Each shall indicate that the first six channels contain lef
45、t, right, centre, low frequency effects, left surround, and right surround respectively. surround shall indicate that the next two channels contain left and right channels (respectively) of a stereo signal suitable for matrix decoding. surroundWithDownmix shall indicate that the next two channels co
46、ntain left and right channels (respectively) of a stereo downmix. Where more than one arrangement can be used to describe a format, the smallest applicable value should be used. EXAMPLE 1 A single stereo pair (2 channels) could be described by values stereo (2), surround (4), or surroundWithDownmix
47、(5). The smallest of these values, i.e. 2, should be used. EXAMPLE 2 Surround sound with no accompanying stereo signal (6 channels) could be described by values surround (4), or surroundWithDownmix (5). The smaller of these values, i.e. 4, should be used. 4.1.1.3 Number of channels The sub-identifie
48、r for number of channels shall be a value of the following type: NumberChannels := INTEGER - An integer representing the number of audio channels - A value of zero shall indicate unspecified. 4.1.1.4 Bit depth The sub-identifier for bit depth shall be a value of the following type: BitDepth := INTEG
49、ER - An integer representing the audio bit depth in bits per sample. - A value of zero shall indicate unspecified. 4.1.1.5 Sampling frequency The sub-identifier for sampling frequency shall be a value of the following type: SamplingFrequency := INTEGER - An integer representing the audio sampling frequency in Hz - A value of zero shall indicate unspecified. 4.1.1.6 Bit rate The sub-identifier for bit rate
