1、 INTERNATIONAL TELECOMMUNICATION UNION ITU-T J.97TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (07/2002) SERIES J: CABLE NETWORKS AND TRANSMISSION OF TELEVISION, SOUND PROGRAMME AND OTHER MULTIMEDIA SIGNALS Ancillary digital services for television transmission Metadata on cable networks ITU-T Rec
2、ommendation J.97 ITU-T J-SERIES RECOMMENDATIONS CABLE NETWORKS AND TRANSMISSION OF TELEVISION, SOUND PROGRAMME AND OTHER MULTIMEDIA SIGNALS General Recommendations J.1J.9 General specifications for analogue sound-programme transmission J.10J.19 Performance characteristics of analogue sound-programme
3、 circuits J.20J.29 Equipment and lines used for analogue sound-programme circuits J.30J.39 Digital encoders for analogue sound-programme signals J.40J.49 Digital transmission of sound-programme signals J.50J.59 Circuits for analogue television transmission J.60J.69 Analogue television transmission o
4、ver metallic lines and interconnection with radio-relay links J.70J.79 Digital transmission of television signals J.80J.89 Ancillary digital services for television transmission J.90J.99 Operational requirements and methods for television transmission J.100J.109 Interactive systems for digital telev
5、ision distribution J.110J.129 Transport of MPEG-2 signals on packetised networks J.130J.139 Measurement of the quality of service J.140J.149 Digital television distribution through local subscriber networks J.150J.159 IPCablecom J.160J.179 Miscellaneous J.180J.199 Application for Interactive Digital
6、 Television J.200J.209 For further details, please refer to the list of ITU-T Recommendations. ITU-T Rec. J.97 (07/2002) i ITU-T Recommendation J.97 Metadata on cable networks Summary This Recommendation specifies that metadata used in cable networks must allow for modification at the cable head-end
7、 by the controlling cable network operator of that metadata received from an original source. Source ITU-T Recommendation J.97 was prepared by ITU-T Study Group 9 (2001-2004) and approved under the WTSA Resolution 1 procedure on 29 July 2002. ii ITU-T Rec. J.97 (07/2002) FOREWORD The International T
8、elecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications. The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on t
9、hem with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Assembly (WTSA), which meets every four years, establishes the topics for study by the ITU-T study groups which, in turn, produce Recommendations on these topics. The approval of ITU
10、-T Recommendations is covered by the procedure laid down in WTSA Resolution 1. In some areas of information technology which fall within ITU-Ts purview, the necessary standards are prepared on a collaborative basis with ISO and IEC. NOTE In this Recommendation, the expression “Administration“ is use
11、d for conciseness to indicate both a telecommunication administration and a recognized operating agency. INTELLECTUAL PROPERTY RIGHTS ITU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. ITU ta
12、kes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others outside of the Recommendation development process. As of the date of approval of this Recommendation, ITU had not received notice of intellectual prop
13、erty, protected by patents, which may be required to implement this Recommendation. However, implementors are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database. ITU 2002 All rights reserved. No part of this publication ma
14、y be reproduced, by any means whatsoever, without the prior written permission of ITU. ITU-T Rec. J.97 (07/2002) iii CONTENTS Page 1 Scope 1 2 References. 1 2.1 Informative . 1 3 Terms, definitions and conventions 1 4 Abbreviations and acronyms 2 5 Background. 2 6 Recommendation 2 ITU-T Rec. J.97 (0
15、7/2002) 1 ITU-T Recommendation J.97 Metadata on cable networks 1 Scope This Recommendation specifies that the recipient of metadata from an original source intended to be distributed on cable networks is the cable head-end or cable distribution center of the controlling multiple service operator (MS
16、O). The MSO can then use and add information to metadata and then, selectively redistribute metadata to cable customer services based upon designated metadata profiles. Metadata, as used in this Recommendation, is descriptive data associated with a content asset package. It may vary in extent from m
17、erely identifying the content package title, or information to populate an EPG or managing assets, to providing a complete index of different scenes in a movie or providing business rules detailing how the content package may be displayed, copied, or sold. Metadata may originate from studios, distri
18、bution networks (cable, satellite, or others), and other sources. 2 References 2.1 Informative 1 PMC Project P/META (Metadata Exchange Standards), European Broadcasting Union, http:/www.ebu.ch/pmc_meta.html. 2 ISO/IEC 15938-1:2002, Information Technology Multimedia content description interface Part
19、 1: Systems. 3 ISO/IEC 15938-2:2002, Information Technology Multimedia content description interface Part 2: Description definition language. 4 ISO/IEC 15938-3:2002, Information Technology Multimedia content description interface Part 3: Visual. 5 ISO/IEC 15938-4:2002, Information Technology Multime
20、dia content description interface Part 4: Audio. 6 MPEG-7: Context, objectives and technical roadmaps, (V. 12), ISO/IEC ITC1/SC29/WG11/N2861, July 1999. 7 Specification Series: S-3 on Metadata, The TV-Anytime Forum. http:/xml.coverpages.org/TVAnytime-sP003v11.pdf. 3 Terms, definitions and convention
21、s If this Recommendation is implemented, the keywords “MUST“ and “SHALL“ as well as “REQUIRED“ are to be interpreted as indicating a mandatory aspect of this Recommandation. The keywords indicating a certain level of significance of a particular requirement that are used throughout this Recommendati
22、on are summarized below. “MUST“ This word or the adjective “REQUIRED“ means that the item is an absolute requirement of this Recommandation. “MUST NOT“ This phrase means that the item is an absolute prohibition of this Recommandation. 2 ITU-T Rec. J.97 (07/2002) “SHOULD“ This word or the adjective “
23、RECOMMENDED“ means that there may exist valid reasons in particular circumstances to ignore this item, but the full implications should be understood and the case carefully weighed before choosing a different course. “SHOULD NOT“ This phrase means that there may exist valid reasons in particular cir
24、cumstances when the listed behavior is acceptable or even useful, but the full implications should be understood and the case carefully weighed before implementing any behavior described with this label. “MAY“ This word or the adjective “OPTIONAL“ means that this item is truly optional. One vendor m
25、ay choose to include the item because a particular marketplace requires it or because it enhances the product, for example; another vendor may omit the same item. 4 Abbreviations and acronyms This Recommandation uses the following abbreviations: CPE Customer Premises Equipment EPG Electronic Program
26、me Guide MSO Multiple Service Operator; a Cable Network Operator VoD Video on Demand 5 Background Multiple-content providers may provide many and various kinds of products such as movies or educational programs for transmission over cable networks. Metadata is descriptive data associated with a cont
27、ent asset package. Business-to-business arrangements are made to facilitate the transfer of content via an MSOs head-end(s) to CPE, (e.g. set-top boxes, PVRs, etc.). Content assets along with its metadata are transferred on a network from a content source, or independent provider, to an MSOs Asset M
28、anagement System (AMS) residing in the head-end. Metadata may also be generated from several sources along the distribution path from the content provider to the eventual end user. At the AMS, application-specific metadata is unwrapped to provide placement, business rules or other information about
29、the content. Some of this metadata may be reused in services to customers (e.g. VoD, EPG, etc.), which must be at the discretion of the MSO and application server. 6 Recommendation In view of the importance of the use of metadata associated with content assets for completing business-to-business and
30、 application arrangements used in properly conveying source content assets by MSOs over cable networks to end users, the intended recipient of this metadata applied in the process MUST be the controlling MSO of the cable network who can readily use, add to and selectively redistribute metadata to ca
31、ble customer services based upon designated metadata profiles. Printed in Switzerland Geneva, 2002 SERIES OF ITU-T RECOMMENDATIONS Series A Organization of the work of ITU-T Series B Means of expression: definitions, symbols, classification Series C General telecommunication statistics Series D Gene
32、ral tariff principles Series E Overall network operation, telephone service, service operation and human factors Series F Non-telephone telecommunication services Series G Transmission systems and media, digital systems and networks Series H Audiovisual and multimedia systems Series I Integrated ser
33、vices digital network Series J Cable networks and transmission of television, sound programme and other multimedia signals Series K Protection against interference Series L Construction, installation and protection of cables and other elements of outside plant Series M TMN and network maintenance: i
34、nternational transmission systems, telephone circuits, telegraphy, facsimile and leased circuits Series N Maintenance: international sound programme and television transmission circuits Series O Specifications of measuring equipment Series P Telephone transmission quality, telephone installations, l
35、ocal line networks Series Q Switching and signalling Series R Telegraph transmission Series S Telegraph services terminal equipment Series T Terminals for telematic services Series U Telegraph switching Series V Data communication over the telephone network Series X Data networks and open system communications Series Y Global information infrastructure and Internet protocol aspects Series Z Languages and general software aspects for telecommunication systems
