ITU-T H 763 2-2017 Scalable vector graphics for IPTV services (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.763.2 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (03/2017) SERIES H: AUDIOVISUAL AND MULTIMEDIA SYSTEMS IPTV multimedia services and applications for IPTV IPTV multimedia application frameworks Scalable vector graphi

2、cs for IPTV services Recommendation ITU-T H.763.2 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 aspect

3、s H.230H.239 Communication procedures H.240H.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

4、for audiovisual and multimedia services H.360H.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 serv

5、ices H.510H.519 Mobile multimedia collaboration 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 Mobility interworking procedures H.550H.559 Mobile multimedia collabor

6、ation inter-working procedures 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 SERVI

7、CES AND 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 Signa

8、ge H.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

9、 ITU-T Recommendations. Rec. ITU-T H.763.2 (03/2017) i Recommendation ITU-T H.763.2 Scalable vector graphics for IPTV services Summary Recommendation ITU-T H.763.2 describes the functionalities of SVG Tiny, which is issued by W3C organization, as one of the multimedia application frameworks for IPTV

10、 services. According to different capabilities of terminal devices on supported services and processing performance, SVG Tiny is classified into “Basic Profile“ and “Advanced Profile“ for different IPTV terminal device models in this Recommendation. Scalable vector graphics (SVG) basic profile is de

11、signed for the Internet protocol television (IPTV) terminal device (TD) basic model ITU-T H.721 and mobile model ITU-T H.723, and SVG advanced profile is designed for the IPTV TD full-fledged model ITU-T H.722. SVG advanced profile supports more capabilities of two-dimensional graphics rendering tha

12、n SVG basic profile, particularly in styling, animation, multimedia and interactivity. This Recommendation describes the required aspects of SVG modules, elements, attributes and properties to be supported by those two profiles. It also gives some typical example codes or simulation results. History

13、 Edition Recommendation Approval Study Group Unique ID* 1.0 ITU-T H.763.2 2017-03-01 16 11.1002/1000/13210 Keywords IPTV, multimedia application framework, SVG, XML. * To access the Recommendation, type the URL http:/handle.itu.int/ in the address field of your web browser, followed by the Recommend

14、ations unique ID. For example, http:/handle.itu.int/11.1002/1000/11830-en. ii Rec. ITU-T H.763.2 (03/2017) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications, information and communication technologies (ICTs). The ITU

15、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 them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardizat

16、ion 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-T Recommendations is covered by the procedure laid down in WTSA Resolution 1. In some areas of information techno

17、logy 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 used for conciseness to indicate both a telecommunication administration and a recognized operating agency. Complianc

18、e with 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 obliga

19、tory language 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

20、of this 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 th

21、e date 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 co

22、nsult the TSB patent database at http:/www.itu.int/ITU-T/ipr/. ITU 2017 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.763.2 (03/2017) iii Table of Contents Page 1 Scope . 1 2 References . 1 3 Def

23、initions 2 3.1 Terms defined elsewhere 2 3.2 Terms defined in this Recommendation . 2 4 Abbreviations and acronyms 2 5 Conventions 3 6 Introduction . 3 7 Basic profile 4 7.1 Document structure 4 7.2 Fonts . 10 7.3 Shape 12 7.4 Text . 15 7.5 Painting . 16 7.6 Interactivity . 17 7.7 Animation . 27 7.8

24、 Reference 30 8 Advanced profile 32 8.1 Document structure 33 8.2 Fonts . 37 8.3 Shape 38 8.4 Text . 39 8.5 Painting . 41 8.6 Interactivity . 43 8.7 Multimedia . 44 8.8 Animation . 48 8.9 Reference 50 9 Styling . 51 9.1 Styling usage in IPTV services . 51 9.2 Styling properties for IPTV services 52

25、10 Pagination . 57 Annex A Basic data types . 58 Annex B Overview of uDOM . 59 B.1 Supported methods . 59 B.2 uDOM modules 59 Appendix I SVG elements for IPTV TD models 61 Bibliography. 63 Rec. ITU-T H.763.2 (03/2017) 1 Recommendation ITU-T H.763.2 Scalable vector graphics for IPTV services 1 Scope

26、This Recommendation describes the functionalities of the scalable vector graphics (SVG) for IPTV services. SVG, as one of those standard multimedia application frameworks described in ITU-T H.760, provides interoperable use of IPTV services. IPTV terminal devices supporting SVG can provide functiona

27、lities of a variety of content and its interactivity, such as audio, video, graphics and text. Expected services include additional data such as text, animation to enrich TV programmes, and two-way portal pages. This Recommendation describes the profiles, which is a subset of W3C SVG W3C SVG Tiny, c

28、lassified into 2 levels to be implemented by IPTV TD Basic model ITU-T H.721, Mobile model ITU-T H.723 and Full-fledged model ITU-T H.722 with different service capabilities. It describes the use of IP-based protocols for transport of SVG and IPTV-related services. 2 References The following ITU-T R

29、ecommendations and other 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 ar

30、e therefore encouraged 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

31、a stand-alone document, the status of a Recommendation. ITU-T F.902 Recommendation ITU-T F.902 (1995), Interactive services design guidelines. ITU-T H.720 Recommendation ITU-T H.720 (2008), Overview of IPTV terminal devices and end systems. ITU-T H.721 Recommendation ITU-T H.721 (2009), IPTV termina

32、l devices: Basic model. ITU-T H.722 Recommendation ITU-T H.722 (2014), IPTV terminal device: Full-fledged model. ITU-T H.723 Recommendation ITU-T H.723(2016), IPTV terminal device: Mobile model. ITU-T H.760 Recommendation ITU-T H.760 (2009), Overview of multimedia application frameworks for IPTV ser

33、vices. ITU-T H.762 Recommendation ITU-T H.762 (2009), Lightweight interactive multimedia environment (LIME) for IPTV services. ITU-T H.764 Recommendation ITU-T H.764 (2012), IPTV services enhanced script language. ITU-T Y.1901 Recommendation ITU-T Y.1901 (2009), Requirements for the support of IPTV

34、services. ISO/IEC 16262 ISO/IEC 16262:2011, Information technology Programming languages, their environments and system software interfaces ECMAScript language specification. W3C SVG Tiny W3C Recommendation (2008), Scalable Vector Graphics (SVG) Tiny 1.2 Specification. 2 Rec. ITU-T H.763.2 (03/2017)

35、 3 Definitions 3.1 Terms defined elsewhere This Recommendation uses the following terms defined elsewhere: 3.1.1 Internet protocol television (IPTV) ITU-T Y.1901: Multimedia services such as television/video/audio/text/graphics/data delivered over IP-based networks that are managed to support the re

36、quired level of QoS/QoE, security, interactivity and reliability. 3.1.2 electronic programme guide (EPG) ITU-T Y.1901: A structured set of data, intended to provide information on available content that may be accessed by end users. 3.1.3 linear TV ITU-T Y.1901: A television service in which a conti

37、nuous stream flows in real time from the service provider to the terminal device and where the user cannot control the temporal order in which contents are viewed. 3.1.4 video-on-demand (VoD) ITU-T Y.1901: A service in which the end user can, on demand, select and view video content and where the en

38、d user can control the temporal order in which the video content is viewed (e.g., the ability to start the viewing, pause, fast forward, rewind, etc.). 3.1.5 user agent ITU-T H.764: One type of web agent; a piece of software acting on behalf of a person. 3.1.6 terminal device (TD) ITU-T Y.1901: An e

39、nd-user device which typically presents and/or processes the content, such as a personal computer, a computer peripheral, a mobile device, a TV set, a monitor, a VoIP terminal or an audiovisual media player. 3.1.7 user interface (UI) ITU-T F.902: Software and hardware components through which a user

40、 can interact with a system. 3.1.8 ECMAScript ISO/IEC 16262: The programming language defined by ISO/IEC 16262:2011. 3.1.9 LIME-Script ITU-T H.762: The subset of ECMAScript defined in this Recommendation that composes lightweight interactive multimedia environment (LIME). 3.2 Terms defined in this R

41、ecommendation None. 4 Abbreviations and acronyms This Recommendation uses the following abbreviations and acronyms. API Application Programming Interface CSS Cascading Style Sheets DOM Document Object Model ECMA European Computer Manufacturers Association HTML Hypertext Markup Language HTTP Hypertex

42、t Transport Protocol IP Internet Protocol IPTV SESL IPTV Service Enhanced Scripting Language IRI Internationalized Resource Identifier LIME Lightweight Interactive Multimedia Environment for IPTV MIME Multipurpose Internet Mail Extensions Rec. ITU-T H.763.2 (03/2017) 3 SMIL Synchronized Multimedia I

43、ntegration Language SVG Scalable Vector Graphics SVG DOM SVG Document Object Model TD Terminal Device uDOM SVG Micro Document Object Model UI User Interface VoD Video on Demand XML extensible Mark-up Language XSL extensible Stylesheet Language XSLT XSL Transformations 5 Conventions In this Recommend

44、ation: The keywords “is required to“ indicate a requirement which must be strictly followed and from which no deviation is permitted if conformance to this Recommendation is to be claimed. The keywords “is prohibited from“ indicate a requirement which must be strictly followed and from which no devi

45、ation is permitted if conformance to this Recommendation is to be claimed. The keywords “is recommended“ indicate a requirement which is recommended but which is not absolutely required. Thus this requirement need not be present to claim conformance. The keywords “is not recommended“ indicate a requ

46、irement which is not recommended but which is not specifically prohibited. Thus, conformance with this specification can still be claimed even if this requirement is present. The keywords “can optionally“ indicate an optional requirement which is permissible, without implying any sense of being reco

47、mmended. This term is not intended to imply that the vendors implementation must provide the option and the feature can be optionally enabled by the network operator/service provider. Rather, it means the vendor may optionally provide the feature and still claim conformance with the specification. 6

48、 Introduction Scalable vector graphic (SVG) b-W3C SVG is a language for describing two-dimensional graphics and graphical applications in extensible mark-up language (XML) b-W3C XML 1.0. SVG b-W3C SVG allows for several types of graphic objects: vector graphic shapes (e.g., paths consisting of strai

49、ght lines and curves), images, video, audio and text. Graphic objects can be grouped, styled, transformed and composited into previously rendered objects. The feature set includes nested transformations, clipping paths, alpha masks, filter effects and template objects. SVG drawings can be interactive and dynamic. Animations can be defined and triggered either declaratively or via scripting. Sophisticated applications of SVG are possible by use of a supplement