ITU-T H 782-2017 Digital signage Metadata (Study Group 16).pdf

1、 I n t e r n a t i o n a l T e l e c o m m u n i c a t i o n U n i o n ITU-T H.782 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (12/2017) SERIES H: AUDIOVISUAL AND MULTIMEDIA SYSTEMS IPTV multimedia services and applications for IPTV Digital Signage Digital signage: Metadata Recommendation ITU-T

2、H.782 ITU-T H-SERIES RECOMMENDATIONS AUDIOVISUAL AND MULTIMEDIA SYSTEMS CHARACTERISTICS OF VISUAL TELEPHONE SYSTEMS H.100H.199 INFRASTRUCTURE OF AUDIOVISUAL SERVICES General H.200H.219 Transmission multiplexing and synchronization H.220H.229 Systems aspects H.230H.239 Communication procedures H.240H

3、.259 Coding of moving video H.260H.279 Related systems aspects H.280H.299 Systems and terminal equipment for audiovisual services H.300H.349 Directory services architecture for audiovisual and multimedia services H.350H.359 Quality of service architecture for audiovisual and multimedia services H.36

4、0H.369 Telepresence H.420H.429 Supplementary services for multimedia H.450H.499 MOBILITY AND COLLABORATION PROCEDURES Overview of Mobility and Collaboration, definitions, protocols and procedures H.500H.509 Mobility for H-Series multimedia systems and services H.510H.519 Mobile multimedia collaborat

5、ion applications and services H.520H.529 Security for mobile multimedia systems and services H.530H.539 Security for mobile multimedia collaboration applications and services H.540H.549 VEHICULAR GATEWAYS AND INTELLIGENT TRANSPORTATION SYSTEMS (ITS) Architecture for vehicular gateways H.550H.559 Veh

6、icular gateway interfaces H.560H.569 BROADBAND, TRIPLE-PLAY AND ADVANCED MULTIMEDIA SERVICES Broadband multimedia services over VDSL H.610H.619 Advanced multimedia services and applications H.620H.629 Ubiquitous sensor network applications and Internet of Things H.640H.649 IPTV MULTIMEDIA SERVICES A

7、ND APPLICATIONS FOR IPTV General aspects H.700H.719 IPTV terminal devices H.720H.729 IPTV middleware H.730H.739 IPTV application event handling H.740H.749 IPTV metadata H.750H.759 IPTV multimedia application frameworks H.760H.769 IPTV service discovery up to consumption H.770H.779 Digital Signage H.

8、780H.789 E-HEALTH MULTIMEDIA SERVICES AND APPLICATIONS Personal health systems H.810H.819 Interoperability compliance testing of personal health systems (HRN, PAN, LAN, TAN and WAN) H.820H.859 Multimedia e-health data exchange services H.860H.869 For further details, please refer to the list of ITU-

9、T Recommendations. Rec. ITU-T H.782 (12/2017) i Recommendation ITU-T H.782 Digital signage: Metadata Summary Recommendation ITU-T H.782 specifies the data elements and structures of the metadata for digital signage services. The metadata describes information for contents, terminal devices, play log

10、s, playlist schedule, screen layout, etc. The metadata is handled by a digital signage server, a digital signage client, a content delivery server, and a content delivery client. It also specifies general information flows to describe how the metadata are used in the digital signage services. Histor

11、y Edition Recommendation Approval Study Group Unique ID* 1.0 ITU-T H.782 2017-12-14 16 11.1002/1000/13439 Keywords Digital signage, information flows, metadata. * To access the Recommendation, type the URL http:/handle.itu.int/ in the address field of your web browser, followed by the Recommendation

12、s unique ID. For example, http:/handle.itu.int/11.1002/1000/11830-en. ii Rec. ITU-T H.782 (12/2017) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications, information and communication technologies (ICTs). The ITU Telecom

13、munication 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 them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Ass

14、embly (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-T Recommendations is covered by the procedure laid down in WTSA Resolution 1. In some areas of information technology wh

15、ich 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 used for conciseness to indicate both a telecommunication administration and a recognized operating agency. Compliance with

16、this Recommendation is voluntary. However, the Recommendation may contain certain mandatory provisions (to ensure, e.g., interoperability or applicability) and compliance with the Recommendation is achieved when all of these mandatory provisions are met. The words “shall“ or some other obligatory la

17、nguage such as “must“ and the negative equivalents are used to express requirements. The use of such words does not suggest that compliance with the Recommendation is required of any party. INTELLECTUAL PROPERTY RIGHTSITU draws attention to the possibility that the practice or implementation of this

18、 Recommendation may involve the use of a claimed Intellectual Property Right. ITU takes 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

19、of approval of this Recommendation, ITU had not received notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, implementers are cautioned that this may not represent the latest information and are therefore strongly urged to consult t

20、he TSB patent database at http:/www.itu.int/ITU-T/ipr/. ITU 2018 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. Rec. ITU-T H.782 (12/2017) iii Table of Contents Page 1 Scope . 1 2 References . 1 3 Definitions

21、1 3.1 Terms defined elsewhere 1 3.2 Terms defined in this Recommendation . 2 4 Abbreviations and acronyms 2 5 Conventions 2 6 Overview . 4 7 Configuration of terminal device 5 7.1 Client configuration 5 7.2 Terminal device 7 7.3 Interactive device 9 7.4 Content delivery server . 10 7.5 Log server .

22、11 7.6 Playlist schedule server 12 7.7 Terminal device status 13 7.8 Terminal group . 14 8 Play log . 16 9 Content delivery scheduling . 18 10 Playlist schedule . 19 10.1 Playlist schedule . 19 10.2 Playlist 22 10.3 Contents 23 11 Screen . 26 11.1 Screen layout 26 11.2 Region . 26 12 Interactive ser

23、vice . 27 Annex A Relation among metadata tables 30 Bibliography. 32 Rec. ITU-T H.782 (12/2017) 1 Recommendation ITU-T H.782 Digital signage: Metadata 1 Scope This Recommendation addresses specifications for the metadata, which especially focus on semantics aspects, related to general digital signag

24、e services. This Recommendation defines metadata for the following digital signage functionalities: terminal devices; play logs; content delivery scheduling; playlist and content; playlist schedule; screen layout and region; interactive service. 2 References The following ITU-T Recommendations and o

25、ther references contain provisions which, through reference in this text, constitute provisions of this Recommendation. At the time of publication, the editions indicated were valid. All Recommendations and other references are subject to revision; users of this Recommendation are therefore encourag

26、ed to investigate the possibility of applying the most recent edition of the Recommendations and other references listed below. A list of the currently valid ITU-T Recommendations is regularly published. The reference to a document within this Recommendation does not give it, as a stand-alone docume

27、nt, the status of a Recommendation. ITU-T H.741.2 Recommendation ITU-T H.741.2 (2012), IPTV application event handling: Data structures of audience measurement for IPTV services. ITU-T H.780 Recommendation ITU-T H.780 (2012), Digital signage: Service requirements and IPTV-based architecture. ITU-T H

28、.781 Recommendation ITU-T H.781 (2015), Digital signage: Functional architecture. ETSI TS 102 822-3-1 ETSI TS 102 822-3-1 V1.9.2 (2016), Broadcast and On-line Services: Search, select, and rightful use of content on personal storage systems (“TV-Anytime“); Part 3: Metadata; Sub-part 1: Phase 1 Metad

29、ata schemas. IETF RFC 5139 IETF RFC 5139 (2008), Revised Civic Location Format for Presence Information Data Format Location Object (PIDF-LO). ISO 19136 ISO 19136 (2007), Geographic information Geography Markup Language (GML). W3C XMLSchema W3C Recommendation (2004), XML Schema Part 2: Datatypes Sec

30、ond Edition. 3 Definitions 3.1 Terms defined elsewhere This Recommendation uses the following terms defined elsewhere: 2 Rec. ITU-T H.782 (12/2017) 3.1.1 content ITU-T H.780: A combination of audio, still image, graphic, video, or data. NOTE A variety of formats is classified as the “data“ (e.g., te

31、xt, encoded values, multimedia description language introduced by b-ITU-T H.760). 3.1.2 metadata b-ITU-T X.1255: Structured information that pertains to the identity of users, systems, services, processes, resources, information or other entities. 3.1.3 playlist ITU-T H.780: Composed of a list of co

32、ntents. NOTE 1 This data is created and provided by digital service providers. NOTE 2 This data can be selected by an end user when interactivity is supported in a digital signage terminal device. NOTE 3 This data may indicate an order of playing contents. 3.1.4 playlist schedule ITU-T H.780: Compos

33、ed of a list of playlists indicated by a specific play date and/or time. 3.1.5 proof-of-play (PoP) ITU-T H.781: Any technique that can identify and prove that the content has been displayed on the screen. 3.2 Terms defined in this Recommendation This Recommendation defines the following terms: 3.2.1

34、 play log: A collection of record or information created by a digital signage system reflecting the content played, system performance, and other data. 3.2.2 region: A partial area of the screen layout to be a content displayed. 3.2.3 screen layout: A composition of one or more regions to be content

35、 displayed. 4 Abbreviations and acronyms This Recommendation uses the following abbreviations and acronyms: DS Digital Signage GML Geography Markup Language URI Uniform Resource Identifier URL Uniform Resource Locator UTC Coordinated Universal Time XML eXtensible Mark-up Language 5 Conventions This

36、Recommendation follows the notation described in clause 6 of ITU-T H.741.2. The notation is used in this Recommendation to facilitate the specification of the corresponding schema: Definition/Semantics: definition and semantics of the element / attribute along with notes and value domain. Support: d

37、escribes the requirement level and number of occurrence of the pertaining instance. The notations for requirement level are M for mandatory, R for recommended, O for optional. The notations for number of occurrence are (1) = (one instance), (0-1) = (zero or one instance), (0-*) = (zero or multiple i

38、nstances possible), (1-*) = (one or multiple instances possible). Type: describes the type of the pertaining instance as defined in Table 1. Container: elements are defined to group associated elements. Rec. ITU-T H.782 (12/2017) 3 Table 1 contains data types used in this Recommendation; alternative

39、 representations may be shown which illustrates other data structures. In case of discrepancy with any alternative representation, the correct information is to be found in Table 1. Table 1 Data types used in this Recommendation Type Name Notes/Reference ca:civicAddress Civic address Used to specify

40、 civic location. Defined in IETF RFC 5139. gml:Point GML point Used to specify simple point geometry in format of geography markup language (GML). A point consists of a element with a child element. Within the latitude and longitude values are separated by a space. Defined in ISO 19136. tva:GenreTyp

41、e Genre Used to specify genre of the content. Defined in ETSI TS 102 822-3-1. xs:date Date Used to specify date. The lexical form is CCYY-MM-DD where “CC“ represents the century, “YY“ the year, “MM“ the month and “DD“ the day. Defined in W3C XMLSchema. xs:duration Duration Used to specify duration o

42、f time. The lexical form is PnYnMnDTnHnMnS, where “P“ represents the starts expression, “nY“ represents number of years, “nM“ represents number of months, “nD“ represents number of days, “T“ represents separation of date and time, “nH“ represents number of hours, “nM“ represents number of minutes, a

43、nd “nS“ represents number of seconds. Defined in W3C XMLSchema. xs:time Time Used to specify time. The format of time is “hh:mm:ss“ where: hh indicates the hour, mm indicates the minute, ss indicates the second. Defined in W3C XMLSchema. xs:dateTime Date and time Used to specify date and time. The f

44、ormat of dateTime is YYYY-MM-DDThh:mm:ss.s+zzzzzz Defined in W3C XMLSchema. xs:ID Identifier Used to specify identifiers. Defined in W3C XMLSchema. xs:IDREF Reference to Identifier Used to specify a reference to xs:ID. Defined in W3C XMLSchema. xs:IDREFS Reference to list of Identifiers Used to spec

45、ify a list of references to list of xs:IDs. Defined in W3C XMLSchema. xs:integer Integer Used to specify a numeric value without a fractional component. Defined in W3C XMLSchema. xs:language Natural language identifier Used to specify a natural language identifier. Defined in W3C XMLSchema. 4 Rec. I

46、TU-T H.782 (12/2017) Table 1 Data types used in this Recommendation Type Name Notes/Reference xs:nonNegativeInteger Non-negative integer Used to specify integer containing only non-negative values (e.g., 0,1,2,) Defined in W3C XMLSchema. xs:positiveInteger Positive integer Used to specify integer co

47、ntaining only positive values (e.g., 1,2,). Defined in W3C XMLSchema. xs:string String Used to specify string value which contains characters, line feeds, carriage returns, and tab characters. Defined in W3C XMLSchema. xs:NMTOKEN Normalized String without spaces Used to specify string after white sp

48、ace replacement. This is, any occurrence of line feeds, carriage returns, contiguous of spaces, and tab are replaced by a single space along with leading or trailing spaces removed. Defined in W3C XMLSchema. xs:NMTOKENS List of NMTOKEN A whitespace-separated list of NMTOKEN values. Defined in W3C XM

49、LSchema. xs:anyURI URI Used to specify uniform resource identifier (URI). Defined in W3C XMLSchema. 6 Overview This Recommendation address metadata related to digital signage services to present details of contents and service information. ITU-T H.780 specifies some elements of metadata that are applicable to digital signage services. Digital signage server has capabilities for administration of digital signage system, control of