SIST EN 62261-2:2007

Television METADATA -- Part 2: Data encoding protocol using key-length-value

This part of IEC 62261 defines an octet-level data encoding protocol for representing data items and data groups. This protocol defines a data structure which is independent of the application or transportation method used. The standard defines a key-length-value (KLV) triplet as a data interchange protocol for data items where the key identifies the data, the length specifies the length of the data, and the value is the data itself. The KLV protocol provides a common interchange for all compliant applications irrespective of the method of implementation or transport. The standard also provides methods for combining associated KLV triplets in data sets where the set of KLV triplets is itself coded with KLV data coding protocol. Such sets can be coded in either full form (universal sets) or in one of four increasingly bit-efficient forms (global sets, local sets, variable-length packs, and fixed-length packs). The standard provides a definition of each of these data constructs. The encoding octet range (length of the payload) specified in this standard may generate unusually large volumes of data. Consequently, a specific application of KLV encoding is capable of only a limited operating data range and those details shall be defined in a relevant application document. Of necessity, keys and other reference data have to be globally unique if clashes are to be avoided. The IEC will therefore, from time to time, designate other bodies to act as its registration authority and agent in this respect; it is important to note that, as a result of this, registrations will always contain the designator of the registration authority acting at the time of registration and not that of the IEC (unless the IEC was acting directly as its own registration authority). A mixture of registration authority designators is therefore to be expected.

Fernseh-Metadaten -- Teil 2: Protokoll zur Datencodierung mit Schlüssellängenwert

Métadonnées des applications télévision -- Partie 2: Protocole de codage des données par méthode de longueur de clés

Televizijski metapodatki – 2. del: Protokol za kodiranje podatkov z uporabo vrednosti dolžine ključa (IEC 62261-2:2005)

General Information

• Status: Withdrawn
• Publication Date: 28-Feb-2007
• Withdrawal Date: 15-Aug-2024
• ICS: 33.160.01 - Audio, video and audiovisual systems in general
• ICS: 35.040.40 - Coding of audio, video, multimedia and hypermedia information
• Technical Committee: AVM - Audio, video and multimedia systems and equipment
• Current Stage: 9900 - Withdrawal (Adopted Project)
• Start Date: 13-Aug-2024
• Due Date: 05-Sep-2024
• Completion Date: 16-Aug-2024
• Ref Project: EN 62261-2:2006 - Television METADATA - Part 2: Data encoding protocol using key-length-value

Standards Content (Sample)

SLOVENSKI STANDARD
01-marec-2007
7HOHYL]LMVNLPHWDSRGDWNL±GHO3URWRNRO]DNRGLUDQMHSRGDWNRY]XSRUDER
YUHGQRVWLGROåLQHNOMXþD,(&
Television METADATA -- Part 2: Data encoding protocol using key-length-value
Fernseh-Metadaten -- Teil 2: Protokoll zur Datencodierung mit Schlüssellängenwert
Métadonnées des applications télévision -- Partie 2: Protocole de codage des données
par méthode de longueur de clés
Ta slovenski standard je istoveten z: EN 62261-2:2006
ICS:
33.160.01 Avdio, video in avdiovizualni Audio, video and audiovisual
sistemi na splošno systems in general
35.040 Nabori znakov in kodiranje Character sets and
informacij information coding
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 62261-2
NORME EUROPÉENNE
December 2006
EUROPÄISCHE NORM
ICS 33.160; 35.040
English version
Television METADATA
Part 2: Data encoding protocol using key-length-value
(IEC 62261-2:2005)
Métadonnées des applications télévision Fernseh-Metadaten
Partie 2: Protocole de codage des Teil 2: Protokoll zur Datencodierung mit
données par méthode de longueur de clés Schlüssellängenwert
(CEI 62261-2:2005) (IEC 62261-2:2005)

This European Standard was approved by CENELEC on 2006-12-01. 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 standard 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 two official versions (English and German). A version in any other 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, Cyprus, the Czech
Republic, 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.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2006 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 62261-2:2006 E
Foreword
The text of the International Standard IEC 62261-2:2005, prepared by Technical Area 6: Higher data rate
storage media, data structure and equipment, of IEC TC 100, Audio, video and multimedia systems and
equipment, was submitted to the formal vote and was approved by CENELEC as EN 62261-2 on
2006-12-01 without any modification.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
(dop) 2007-12-01
national standard or by endorsement
– latest date by which the national standards conflicting
(dow) 2009-12-01
with the EN have to be withdrawn
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 62261-2:2005 was approved by CENELEC as a European
Standard without any modification.
__________
- 3 - EN 62261-2:2006
Annex ZA
(normative)
Normative references to international publications
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.

NOTE  When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year

ISO/IEC 8825-1 2002 Information technology - -
ASN.1 encoding rules: Specification of Basic
Encoding Rules (BER), Canonical Encoding
Rules (CER) and Distinguished Encoding
Rules (DER)
ANSI/SMPTE 1997 Television - Universal Labels for Unique - -
298M Identification of Digital Data

INTERNATIONAL IEC
STANDARD 62261-2
First edition
2005-08
Television METADATA –
Part 2:
Data encoding protocol using key-length-value

 IEC 2005  Copyright - all rights reserved
No part of this publication may be reproduced 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 Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: [phone] Telefax: [phone] E-mail: [e-mail] Web: www.iec.ch
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International Electrotechnical Commission
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For price, see current catalogue

– 2 – 62261-2  IEC: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 Identification 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 Key.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 (informative) 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 local 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

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
Table 7 – Field descriptions for the UL key for local set encoding .18
Table 8 – Coding of registry designator (octet 6) for local set syntax .19
Table 9 – Field descriptions for the UL key for variable-length pack encoding.21
Table 10 – Coding of registry designator (octet 6) for variable-length pack syntax .21
Table 11 – Field descriptions for the UL key for fixed-length pack encoding.23
Table 12 – Field descriptors for the UL key for labels.24
Table B.1 – Expanded example of SMPTE universal label fields for metadata encoding.27
Table C.1 – Informative example of KLV individual value encoding of metadata.28
Table D.1 – Informative example of KLV universal set encoding of metadata (octets
separated by spaces for readability) .29
Table E.1 – Informative example of KLV global set encoding of metadata (octets
separated by spaces for readability) .30
Table F.1 – Informative example of KLV local set encoding of metadata (octets
separated by spaces for readability) .31
Table G.1 – Informative example of KLV variable-length pack encoding of metadata
(octets separated by spaces for readability) .32
Table H.1 – Informative example of KLV fixed-length pack encoding of metadata
(octets separated for readability) .33
Table I.1 – Example of a label.34

– 4 – 62261-2  IEC:2005(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
TELEVISION METADATA –
Part 2: Data encoding protocol using key-length-value

FOREWORD
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