1、BRITISH STANDARDBS EN 62261-1:2006Television METADATA Part 1: Metadata dictionary structureThe European Standard EN 62261-1:2006 has the status of a British StandardICS 33.160; 35.040g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3
2、g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 62261-1:2006This British Standard was published under the authority of the Standards Policy and Strategy Committee on 28 February 2007 BSI 2007ISBN 978 0 580 50220 0National forewordThis British Standard was pub
3、lished by BSI. It is the UK implementation of EN 62261-1:2006. It is identical with IEC 62261-1:2005.The UK participation in its preparation was entrusted to Technical Committee EPL/100, Audio, video and multimedia systems and equipment.A list of organizations represented on EPL/100 can be obtained
4、on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.Amendments issued since publicationAmd. No. Date Com
5、mentsEUROPEAN STANDARD EN 62261-1 NORME EUROPENNE EUROPISCHE NORM December 2006 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels
6、2006 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 62261-1:2006 E ICS 33.160; 35.040 English version Television METADATA Part 1: Metadata dictionary structure (IEC 62261-1:2005) Mtadonnes des applications tlvision Partie 1: Stru
7、cture du dictionnaire des mtadonnes (CEI 62261-1:2005) Fernseh-Metadaten Teil 1: Metadaten-Verzeichnisstruktur (IEC 62261-1:2005) 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
8、 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 off
9、icial 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 committe
10、es 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. F
11、oreword The text of the International Standard IEC 62261-1:2005, 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 62261-1 on
12、 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 national standard or by endorsement (dop) 2007-12-01 latest date by which the national standards conflicting with the EN have to be
13、 withdrawn (dow) 2009-12-01 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 62261-1:2005 was approved by CENELEC as a European Standard without any modification. _ EN 62261-1:2006 2 CONTENTS 1 Scope.4 2 Normative references .4 3 Metadata dictionary
14、 structure .4 3.1 General .4 3.2 Compatibility with other metadata structures .5 3.3 Individual metadata classes 5 3.4 Dictionary element structure and format 9 3.5 Metadata dictionary structure maintenance10 Annex A (normative) Glossary of terms.11 Figure 1 Metadata class structure 6 EN 62261-1:200
15、6 3 Annex ZA (normative) Normative references to international publications with theircorresponding European publications 13TELEVISION METADATA Part 1: Metadata dictionary structure 1 Scope The metadata dictionary structure defined in this part of IEC 62261 covers the use of metadata for all types o
16、f essence (video, audio, and data in their various forms). Applications of individual dictionary entries will vary but, when used, metadata shall conform to the definitions and formats in this metadata dictionary structure standard and the associated metadata dictionary recommended practice (IEC 622
17、61-3). IEC 62261-3 defines a registered set of metadata element descriptions for association with essence or other metadata and this standard and the contents practice shall be used together as a pair neither shall be used in isolation. The IEC may, from time to time, appoint other bodies to act as
18、its Registration Authority and Agent for the compilation and safe keeping of IEC 62261-3 as described in IEC 62261-2. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated re
19、ferences, the latest edition of the referenced document (including any amendments) applies. IEC 62261-2, Television metadata Part 2: Data encoding protocol using key-length-value IEC 62261-3, Television metadata Part 3: Universal labels for unique identification of digital data 3 Metadata dictionary
20、 structure 3.1 General The metadata dictionary structure provides flexibility in capturing metadata and exchanging it among applications through a standardized hierarchy of universal labels for the metadata elements, grouped to aid their management within a small but comprehensive number of classes.
21、 Metadata classes are collections of metadata elements with common characteristics or attributes. Additional classes are provided for user-defined metadata. IEC 62261-3 references an individual item or element of metadata using a two-part 16-byte universal label that is numerical (and hence language
22、-independent) and unique. The first eight bytes label the second eight bytes as a “tag” in a specific version of a designated metadata dictionary (“tags” are defined in IEC 62261-2 (key-length-value encoding). This tag is used to index the meaning or definition of the metadata element. The actual me
23、tadata information described by the metadata element is the metadata value. The dictionary also contains information on the required format of metadata values and the allowable range of values (if applicable) either as a list or as a bounded range. Individual data element values can frequently be re
24、presented in more than one way for instance, it is possible to represent a textual value as ASCII or unicode, where the value is identical but the particular representation different. It is important both that the representation is known and that as new representations are registered they can be acc
25、ommodated. In this case, the last active word of the tag defines the representation in use the default being 00h. EN 62261-1:2006 4 The metadata dictionary is organized into nodes and leaves. The dictionary classes just described form class nodes and below these are further nodes at each subclass. T
26、o aid the management of the dictionary, these nodes and subnodes are assigned tags to which no value is assigned, so as to give clear breaks in the structure. Entries within a subclass form leaves, which are the data elements themselves. Lower levels of the dictionary structure can be derived from t
27、he tag structure in IEC 62261-3. 3.2 Compatibility with other metadata structures The metadata dictionary structure is a framework that supports global interoperability by defining metadata tags in a way that enables the interchange of IEC metadata with metadata from different sources and originated
28、 by other bodies. Many different cataloguing conventions are used by communities who focus on a specific domain or subject or who have specific needs for archive and retrieval of multimedia data including, for example, intellectual rights. The metadata dictionary is not intended to replace conventio
29、ns already in use, for example, in textual naming or keywords. Within the framework of the metadata dictionary structure, different content creation communities, media indexing professionals, or metadata extractors and users can develop metadata conventions that meet their specific requirements. 3.3
30、 Individual metadata classes 3.3.1 Organization Within the metadata dictionary, metadata elements are organized into a hierarchical structure, where each is assigned to a metadata class as shown in the overview of Figure 1. The initial set of metadata classes in this standard consists of Class 1: Id
31、entification and location Class 2: Administration Class 3: Interpretive Class 4: Parametric Class 5: Process Class 6: Relational Class 7: Spatio-temporal Class 15: Experimental The number of metadata classes can be extended in the future to a maximum of 127. Although dictionary classes can be popula
32、ted with any metadata (such as that associated with still images, audio, graphics, etc.), additional new classes may be created up to that limit to deal with specific metadata characteristics or attributes. EN 62261-1:2006 5 Metadata Dictionary 1. Identification and Location 2. Administration 3. Int
33、erpretive 4. Parametric 5. Process 6. Relational 7. Spatio-temporal 15. Experimental IEC 1160/05 Figure 1 Metadata class structure 3.3.2 Class 1: Identification and location Metadata in this class shall consist of identifying information (IDs) that describes the essence of the overall bit stream or
34、file. A critical part of Class 1 metadata is unambiguous identification of the essence using a single, recognized number or label. Information in this class shall include global and local identifiers as well as identifying information about the metadata elements themselves (so-called meta-metadata).
35、 Examples of subclass titles in this class are globally unique identifiers; ISO identifiers; object identifiers; device identifiers; unique IPR identifiers; local locators; titles. 3.3.3 Class 2: Administration Metadata in this class shall consist of administrative or business data that describe inf
36、ormation about the essence or metadata that are relevant to its application. Information on authorized use and restrictions on use, and encryption are in this metadata class. Cost information and information needed to protect intellectual property or to protect ownership shall also be contained in C
37、lass 2. Examples of subclass titles in this class are supplier; rights; financial information; security; publication outlet; participating parties; broadcast and repeat statistics. EN 62261-1:2006 6 3.3.4 Class 3: Interpretive Metadata in this class shall consist of descriptive information which is
38、normally considered either a subjective or a human-generated description of the essence or a computational result from machine examination of the essence. Interpretive information shall consist of, but not be limited to, textual terms (for example, keywords, narrative summary, titles, genre categori
39、es, scripts, etc.), or computational metrics (for example, colour histograms, texture maps, object shapes, facial features, etc.). Information in Class 3 shall be principally used for indexing, cataloguing, administering, searching, and retrieving the content of essence. Examples of subclass titles
40、in this class are fundamental (such as ISO language code, length and time systems); descriptive (human-assigned); categorization; assessments; descriptors (machine-assigned or computed). 3.3.5 Class 4: Parametric Metadata in this class shall consist of information that describes the technical charac
41、teristics of the camera, sensor, or system that originates the essence or metadata. Information about the technical characteristics of the essence or metadata is also provided, including but not limited to its creation parameters and the configuration of the originating system. Examples of subclass
42、titles in this class are video essence encoding characteristics; audio essence encoding characteristics; data essence encoding characteristics; metadata encoding characteristics; audio test parameters; film pulldown characteristics; fundamental sequencing and scanning; MPEG coding characteristics; t
43、ime code characteristics. 3.3.6 Class 5: Process Metadata in this class shall consist of information that describes how the essence was processed or otherwise changed or enhanced after its origination. This class shall include, but not be limited to, many of the parameters in an edit decision list.
44、Additional information in Class 5 shall be an audit trail (heritage) of all changes to the original content over time. Also included shall be a record of compression/decompression steps and any changes in storage media or format. Examples of subclass titles in this class are process indicators; mani
45、pulation; downstream processing history; enhancement or modification; audio processor settings (device-specific); editing information. EN 62261-1:2006 7 3.3.7 Class 6: Relational Metadata in this class shall consist of information that describes relationships among objects in the content or among an
46、y combination of essence, objects, and metadata. Examples of subclass titles in this class are generic relationships; relatives; essence-to-essence relationship; metadata-to-essence relationship; metadata-to-metadata relationship; object-to-object relationship; metadata-to-object relationship; relat
47、ed production material; numerical sequence; relationship structures. 3.3.8 Class 7: Spatio-temporal Metadata in this class shall consist of information about aspects of the content or the originating camera, sensor, or system relating to time, place, or space. Geospatial information in Class 7 shall
48、 be any information that defines the positions or places (either absolute or relative) of objects, scenes, individuals, or any other component of the essence. Temporal elements such as dates, time codes, synchronization marks, temporal keywords, and motion (vector) parameters shall also be part of C
49、lass 7 metadata. Examples of subclass titles in this class are position and space vectors; absolute position; image positional information; rate and direction of positional change; abstract locations; angular specifications; distance measurements; operational date and time information; absolute date and time; relative durations; rights date and time; setting date and time (characterized time period); delay; laten
