1、 IEC 62379-2 Edition 1.0 2008-09 INTERNATIONAL STANDARD Common control interface for networked digital audio and video products Part 2: Audio IEC 62379-2:2008(E) THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2008 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part o
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8、v If you wish to give us your feedback on this publication or need further assistance, please visit the Customer Service Centre FAQ or contact us: Email: csciec.ch Tel.: +41 22 919 02 11 Fax: +41 22 919 03 00 IEC 62379-2 Edition 1.0 2008-09 INTERNATIONAL STANDARD Common control interface for network
9、ed digital audio and video products Part 2: Audio INTERNATIONAL ELECTROTECHNICAL COMMISSION XC ICS 33.160.01 PRICE CODE ISBN 2-8318-9987-7 Registered trademark of the International Electrotechnical Commission 2 62379-2 IEC:2008(E) CONTENTS FOREWORD.4 INTRODUCTION.6 1 Scope.7 2 Normative references .
10、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 definitions12 4.3 Audio metadata format definitions .12 5 MIB definitions for audio blocks1
11、3 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 reference19 5.4 Other audio bloc
12、k 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 definition
13、s.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 Audio cross
14、point page .36 6.4.5 Audio clip player page .37 6.4.6 Audio limiter page37 62379-2 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) Machine-readable audio format
15、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 (informative) Tree of example
16、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 objects for audio ports .17 Tabl
17、e 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 audio clip player blocks.27 Ta
18、ble 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 entries for AES3 ancillary
19、 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 Table 19 Status entries for a
20、udio level alarm page.39 4 62379-2 IEC:2008(E) INTERNATIONAL ELECTROTECHNICAL COMMISSION _ COMMON CONTROL INTERFACE FOR NETWORKED DIGITAL AUDIO AND VIDEO PRODUCTS Part 2: Audio FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
21、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 publishes International Standards,
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29、r 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 indispensable for the correct a
30、pplication 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 62379-2 has been prepared techni
31、cal area 4: Digital system interfaces and protocols, of IEC technical committee 100: Audio, video and multimedia systems and equipment. The text of this standard is based on the following documents: FDIS Report on voting 100/1405/FDIS 100/1445/RVD Full information on the voting for the approval of t
32、his 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. 62379-2 IEC:2008(E) 5 The committee has decided that the contents of this publication will remain unchanged until the maintenance resul
33、t date indicated on the IEC web site under “http:/webstore.iec.ch“ in the data related to the specific publication. 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. 6 62379-
34、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 are specific to audio equipment. An introduction to the common control interfac
35、e is given in IEC 62739-1. 62379-2 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 control interface of IEC 62379-1 that are specific to audio. 2 Normative references The following refe
36、renced 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. AES3-2003, AES standard for digital audio Digital input-output inte
37、rfacing 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 (MADI) AES50-2005, AES standard for digital audio engineering High-resolution multi-channel audio
38、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 Recommendation G.722, 7kHz audio-coding within 64 kbit/s ITU-T Recommendation J.41, Characteris
39、tics 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 over H1 channels 3 Terms, definitions and abbreviations For the purposes of this document, the ter
40、ms 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 8 62379-2 IEC:2008(E) 3.1.3 advanced audio coding AAC 4 Audio format definitions 4.1 Audio signal format definitions At any
41、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 interface standard” object identifier defined in this standard or an object identifier defined elsewhere. NOTE Per
42、mitting 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 that may eventually be incorporated into future revisions of this standard. 4.1.1 Audio parameters 4.1.1.1 General T
43、he 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 other subclauses of 4.1.1. Any parameter may be unspecified. The sub-identifier values shall be appended to the ob
44、ject 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 last parameter or all subsequent parameters are also unspecified, then it shall be omitted. NOTE For all parameters,
45、 “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 48kHz would be coded as .16.48000, 16-bit (with sampling frequency unspecified) as .16, and 48kHz (with bit depth uns
46、pecified) 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), discreteMono (1), stereo (2), jointStereo (3), surround (4), surroundWithDownmix (5) (unspecified surroundWithDownmix)
47、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 each pair of channels (if there is more than one pair) is a separate stereo audio signal, with the first channel o
48、f 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 separate stereo audio signal, with the first channel of the pair being the M channel and the second the S channel. 6
49、2379-2 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 left, 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 sha
