IEC_61937-15-2021.pdf

IEC 61937-15 Edition 1.0 2021-03 INTERNATIONAL STANDARD Digital audio Interface for non-linear PCM encoded audio bitstreams applying IEC 60958 Part 15:Non-linear PCM bit streams according to Auro-Cx format IEC 61937-15:2021-03(en)THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2021 IEC,Geneva,Switzerland All rights reserved.Unless otherwise specified,no part of this publication may be reproduced or utilized in any form or by any means,electronic or mechanical,including photocopying and microfilm,without permission in writing from either IEC or IECs member National Committee in the country of the requester.If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication,please contact the address below or your local IEC member National Committee for further information.IEC Central Office Tel.:+41 22 919 02 11 3,rue de Varemb infoiec.ch CH-1211 Geneva 20 www.iec.ch Switzerland About the IEC The International Electrotechnical Commission(IEC)is the leading global organization that prepares and publishes International Standards for all electrical,electronic and related technologies.About IEC publications The technical content of IEC publications is kept under constant review by the IEC.Please make sure that you have the latest edition,a corrigendum or an amendment might have been published.IEC publications search-webstore.iec.ch/advsearchform The advanced search enables to find IEC publications by a variety of criteria(reference number,text,technical committee,).It also gives information on projects,replaced and withdrawn publications.IEC Just Published-webstore.iec.ch/justpublished Stay up to date on all new IEC publications.Just Published details all new publications released.Available online and once a month by email.IEC Customer Service Centre-webstore.iec.ch/csc If you wish to give us your feedback on this publication or need further assistance,please contact the Customer Service Centre:salesiec.ch.IEC online collection-oc.iec.ch Discover our powerful search engine and read freely all the publications previews.With a subscription you will always have access to up to date content tailored to your needs.Electropedia-www.electropedia.org The worlds leading online dictionary on electrotechnology,containing more than 22 000 terminological entries in English and French,with equivalent terms in 18 additional languages.Also known as the International Electrotechnical Vocabulary(IEV)online.IEC 61937-15 Edition 1.0 2021-03 INTERNATIONAL STANDARD Digital audio Interface for non-linear PCM encoded audio bitstreams applying IEC 60958 Part 15:Non-linear PCM bit streams according to Auro-Cx format INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 35.040.40 ISBN 978-2-8322-9526-7 Registered trademark of the International Electrotechnical Commission Warning!Make sure that you obtained this publication from an authorized distributor.2 IEC 61937-15:2021 IEC 2021 CONTENTS FOREWORD.4 INTRODUCTION.6 1 Scope.7 2 Normative references.7 3 Terms,definitions and abbreviated terms.7 3.1 Terms and definitions.7 3.2 Abbreviated terms.8 4 Mapping of the audio bit stream on to IEC 61937-1.8 4.1 General.8 4.2 Auro-Cx burst-info.8 5 Format of Auro-Cx data-bursts.9 5.1 General.9 5.2 Pause data-burst.9 5.3 Audio data-bursts.10 5.3.1 ACX data-burst.10 5.3.2 Latency of the Auro-Cx Decoder.13 5.3.3 ACX HBR2 data-burst.14 5.3.4 Latency of the ACX HBR2 Decoder.17 5.3.5 ACX HBR4 data-burst.18 5.3.6 Latency of the ACX HBR4 Decoder.21 5.3.7 ACX HBR8 data-burst.22 5.3.8 Latency of the ACX HBR8 Decoder.25 Bibliography.27 Figure 1 ACX data-burst.10 Figure 2 ACX Delay Time.14 Figure 3 Auro-Cx HBR2 data-burst.14 Figure 4 ACX HBR2 Delay Time.18 Figure 5 Auro-Cx HBR4 data-burst.18 Figure 6 ACX HBR4 Delay time.22 Figure 7 Auro-Cx HBR8 data-burst.22 Figure 8 ACX HBR8 Delay Time.26 Table 1 Fractional frame rates.8 Table 2 Burst-info for Auro-Cx data-type and subdata-types.9 Table 3 Repetition period of the Pause data-bursts.9 Table 4 Data-type-dependent information for ACX.10 Table 5 ACX data-burst:meaning of Pc bits 8 12.11 Table 6 ACX IEC 60958 frame rate for high sample rates.12 Table 7 ACX repetition periods for fractional frame rates 29,97 fps,59,94 fps and 119,88 fps.12 Table 8 Maximum burst-length values per ACX data-burst repetition period.13 Table 9 Data-type-dependent information for ACX HBR2.14 Table 10 ACX HBR2 data-burst:meaning of Pc bits 8 12.15 IEC 61937-15:2021 IEC 2021 3 Table 11 ACX HBR2 IEC 60958 frame rate for high sample rates.16 Table 12 ACX HBR2 repetition periods for fractional frame rates 29,97 fps,59,94 fps and 119,88 fps.16 Table 13 Maximum burst-length values per ACX HBR2 data-burst repetition period.17 Table 14 Data-type-dependent information for ACX HBR4.18 Table 15 ACX HBR4 data-burst:meaning of Pc bits 812.19 Table 16 ACX HBR4 IEC 60958 frame rate for high sample rates.20 Table 17 ACX HBR4 repetition periods for fractional frame rates 29,97 fps,59,94 fps and 119,88 fps.20 Tab