1、 IEC 60958-4-4 Edition 1.0 2016-03 INTERNATIONAL STANDARD NORME INTERNATIONALE Digital audio interface Part 4-4: Professional applications Physical and electrical parameters Interface audionumrique Partie 4-4: Applications professionnelles Paramtres physiques et lectriques IEC 60958-4-4:2016-03(en-f
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19、mentaires sur cette publication ou si vous avez des questions contactez-nous: csciec.ch. IEC 60958-4-4 Edition 1.0 2016-03 INTERNATIONAL STANDARD NORME INTERNATIONALE Digital audio interface Part 4-4: Professional applications Physical and electrical parameters Interface audionumrique Partie 4-4: Ap
20、plications professionnelles Paramtres physiques et lectriques INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE ICS 33.160.30 ISBN 978-2-8322-3233-0 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique
21、 Internationale Warning! Make sure that you obtained this publication from an authorized distributor. Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agr. 2 IEC 60958-4-4:2016 IEC 2016 CONTENTS FOREWORD . 4 INTRODUCTION . 6 1 Scope 7 2 Normative references
22、. 7 3 Terms and definitions 7 4 Common features 8 5 Jitter 8 5.1 Output interface jitter . 8 5.1.1 General . 8 5.1.2 Intrinsic jitter 8 5.1.3 Jitter gain 9 5.2 Receiver jitter tolerance 10 Annex A (informative) Symbol rates and UI 11 Annex B (normative) Balanced transmission . 12 B.1 General charact
23、eristics 12 B.1.1 Configuration . 12 B.1.2 Equalisation . 12 B.1.3 Cable . 12 B.2 Line driver characteristics 13 B.2.1 Output impedance 13 B.2.2 Signal amplitude 13 B.2.3 Balance . 13 B.2.4 Rise and fall times . 13 B.3 Line receiver characteristics 13 B.3.1 Terminating impedance 13 B.3.2 Maximum inp
24、ut signals . 14 B.3.3 Minimum input signals 14 B.3.4 Receiver equalization . 14 B.3.5 Common-mode rejection 15 B.4 Connector . 15 B.4.1 XLR connector . 15 B.4.2 8-way modular connector . 15 Annex C (normative) Coaxial transmission . 17 C.1 General . 17 C.2 Line driver characteristics 17 C.2.1 Genera
25、l . 17 C.2.2 Output impedance 17 C.2.3 Signal characteristics . 17 C.3 Coaxial cable characteristics . 18 C.4 Line receiver characteristics 18 C.4.1 General . 18 C.4.2 Terminating impedance 19 C.4.3 Maximum input signals . 19 C.4.4 Minimum input signals 19 C.5 Connector . 20 IEC 60958-4-4:2016 IEC 2
26、016 3 Annex D (informative) Optical transmission 21 D.1 Short haul . 21 D.2 Medium haul . 21 D.3 Long haul 21 Bibliography . 22 Figure 1 Intrinsic-jitter measurement-filter characteristic . 9 Figure 2 Jitter transfer-function mask . 10 Figure 3 Jitter tolerance template . 10 Figure B.1 Simplified ex
27、ample of the configuration of the circuit (balanced) . 12 Figure B.2 Eye diagram, balanced receiver . 14 Figure B.3 Suggested equalizing characteristic for a receiver operating at 48 kHz frame rate . 15 Figure C.1 Output signal waveform . 17 Figure C.2 Eye diagram, coaxial receiver 19 Figure C.3 Eye
28、 pattern for long-distance transmission 20 Table A.1 Symbol rate versus sampling frequency 11 Table A.2 UI (ns) versus sampling frequency 11 Table C.1 Output signal characteristics 18 4 IEC 60958-4-4:2016 IEC 2016 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ DIGITAL AUDIO INTERFACE Part 4-4: Professi
29、onal applications Physical and electrical parameters FOREWORD 1) The International Electrotechnical 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-operati
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39、his 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 60958-4-4 has been prepared by technical area 4
40、: Digital system interfaces and protocols, of IEC technical committee 100: Audio, video and multimedia systems and equipment. This first edition, together with IEC 60958-4-1 and IEC 60958-4-2, cancels and replaces the IEC 60958-4 published in 2003 and its Amendment 1:2008 and constitutes a technical
41、 revision. This edition includes the following significant technical changes with respect to IEC 60958-4:2003 with its Amendment 1:2008: a) support for a wider range of physical media; b) support for a wider range of audio sampling frequencies; c) deprecation of “minimum implementation” of channel s
42、tatus data. IEC 60958-4-4:2016 IEC 2016 5 The text of this standard is based on the following documents: CDV Report on voting 100/2454/CDV 100/2583/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. A list of all pa
43、rts in the IEC 60958 series, published under the general title Digital audio interface, can be found on the IEC website. 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 th
44、e stability date indicated on the IEC website 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. 6 IEC 60958-4-4:2016 IEC 2016 INTRODUCTION The two-channel digital aud
45、io interface has been widely used in a variety of professional audio applications that have reached beyond the vision of the original standard. In particular, applications using increased sampling frequencies and alternative physical media. Separating the standard into independently-maintainable par
46、ts allows, for example, additional transmission media to be introduced in the future by revising IEC 60958-4-4 without affecting the other parts of the IEC 60958-4 series. The parts comprise: Part 4-1: Audio content: defines the format for coding audio used for the audio content. It specifies the se
47、mantics of the audio data, including the “validity“ flag. It also specifies the sampling frequency by reference to AES5. Part 4-2: Metadata and subcode: specifies the format for information, metadata, or subcode transmitted with the audio data: principally the channel status but also user data and t
48、he auxiliary bits. Implementors will note that the current implementation options (“Standard“ and “Enhanced“) both require that status data be implemented correctly in compliant equipment. Part 4-4: Physical and electrical parameters: specifies the physical signals that convey the bit stream specifi
49、ed in IEC 60958-1. The transport format is intended for use with shielded twisted-pair cable of conventional design over distances of up to 100 m at frame rates of up to 50 kHz. Longer cable lengths and higher frame rates may be used, but with a rapidly increasing requirement for care in cable selection and possible receiver equalization, or the use of active repeaters. Provision is made in this standard fo
