1、 INTERNATIONAL STANDARD IEC62261-2 First edition2005-08 Television METADATA Part 2:Data encoding protocol using key-length-value Reference number IEC 62261-2:2005(E)LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.Publication numbering
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8、N Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.INTERNATIONAL STANDARD IEC62261-2 First edition2005-08 Television METADATA Part 2:Data encoding protocol using key-length-value IEC 2005 Copyright-all rights reserved No part of this publication may be r
9、eproduced or utilized in any form or by any means,electronic or mechanical,including photocopying and microfilm,without permission in writing from the publisher.International Electrotechnical Commission,3,rue de Varemb,PO Box 131,CH-1211 Geneva 20,SwitzerlandTelephone:+41 22 919 02 11 Telefax:+41 22
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11、:2005(E)CONTENTS FOREWORD.4 1 Scope.6 2 Normative references.6 3 KLV protocol.6 3.1 General.6 3.2 ANSI/SMPTE 298M universal label key.7 3.3 Encoding of the KLV length field.10 3.4 Encoding of data values.11 3.5 Empty metadata items.12 4 KLV coding of individual data items.12 4.1 General.12 4.2 Ident
12、ification of value data representations.12 5 KLV group coding.13 5.1 General.13 5.2 Universal sets.14 5.3 Global sets.14 5.4 Local sets.16 5.5 Variable-length packs.19 5.6 Fixed-length packs.22 6 Labels.24 Annex A(normative)Glossary of terms.25 Annex B(informative)Example usage of Universal Label Ke
13、y.27 Annex C(informative)Example of the KLV encoding of a single metadata item.28 Annex D(informative)Example of a universal set.29 Annex E(informative)Example of a global set.30 Annex F(informative)Example of a local set.31 Annex G(informative)Example of a variable-length pack.32 Annex H(informativ
14、e)Example of a fixed-length pack.33 Annex I(informative)Example of a label.34 Bibliography.35 Figure 1 KLV encoding.7 Figure 2 KLV coded universal set data structure.15 Figure 3 KLV coded global set data structure.17 Figure 4 KLV coded local set structure.18 Figure 5 Informative illustration of loca
15、l set label to global key linking.20 Figure 6 KLV coded variable-length pack structure.21 Figure 7 KLV coded fixed-length pack structure.23 Figure 8 UL key for labels.24 Figure B.1 Example of universal label fields for metadata encoding in the SMPTE namespace.27 LICENSED TO MECON Limited.-RANCHI/BAN
16、GALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.62261-2 IEC:2005(E)3 Table 1 KLV fields for encoding of data.7 Table 2 Field descriptions for the universal label key for the KLV encoding of data.8 Table 3 UL designators for octets 5 through 7.9 Table 4 Field descriptions for the UL key for the KLV encoding of universal sets.15 Table 5 Field descriptions for the UL key for global set encoding.17 Table 6 Coding of registry designator(octet 6)for global set syntax.18 Tab
