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.781 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (04/2015) SERIES H: AUDIOVISUAL AND MULTIMEDIA SYSTEMS IPTV multimedia services and applications for IPTV Digital Signage Digital signage: Functional architecture Recomm
2、endation ITU-T H.781 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 pr
3、ocedures 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 for audiovisual and multimedi
4、a 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 services H.510H.519 Mobile multim
5、edia 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 collaboration inter-working procedure
6、s 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 AND APPLICATIONS FOR IPTV
7、 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.780H.789 E-HEALTH MULTIM
8、EDIA SERVICES AND APPLICATIONS 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-T Recommendations. Rec. ITU-T H.781 (04/2015) i Recommendat
9、ion ITU-T H.781 Digital signage: Functional architecture Summary Recommendation ITU-T H.781 defines a detailed functional architecture to provide digital signage (DS) services. The functional architecture consists of DS server, DS client, content delivery server and content delivery client. This Rec
10、ommendation describes how functions in the architecture interact with each other to provide the services according to general information flows and defines reference points that can be considered in specifying detailed protocols. History Edition Recommendation Approval Study Group Unique ID* 1.0 ITU
11、-T H.781 2015-04-29 16 11.1002/1000/12466 Keywords Digital signage, functional architecture, information flows, reference points. _ * To access the Recommendation, type the URL http:/handle.itu.int/ in the address field of your web browser, followed by the Recommendations unique ID. For example, htt
12、p:/handle.itu.int/11.1002/1000/11830-en. ii Rec. ITU-T H.781 (04/2015) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications, information and communication technologies (ICTs). The ITU Telecommunication Standardization Se
13、ctor (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 Assembly (WTSA), which meets eve
14、ry 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 which fall within ITU-Ts purvie
15、w, 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 this Recommendation is volunt
16、ary. 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 language such as “must“ and the
17、 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 Recommendation may involve t
18、he 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 of approval of this Recommend
19、ation, ITU had 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 the TSB patent database at http:/w
20、ww.itu.int/ITU-T/ipr/. ITU 2015 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.781 (04/2015) iii Table of Contents Page 1 Scope . 1 2 References . 1 3 Definitions 1 3.1 Terms defined elsewhere 1 3
21、.2 Terms defined in this Recommendation . 2 4 Abbreviations and acronyms 2 5 Conventions 3 6 Functional architecture of DS services . 4 6.1 Overview of functional architecture of DS service 4 6.2 Functional architecture of a DS client 8 6.3 Functional architecture of a content delivery client . 11 6
22、.4 Functional architecture of DS server 13 6.5 Functional architecture of content delivery server . 16 7 Reference points . 17 7.1 R1: Digital signage client and digital signage server . 17 7.2 R2: Digital signage server and content delivery server 18 7.3 R3: Digital signage client and content deliv
23、ery client 18 7.4 R4: Content delivery client and content delivery server 19 7.5 R5: Digital signage server and content provider 19 8 Information flows . 19 8.1 Configuration of terminal devices 19 8.2 Play of content and its report 20 8.3 Display of alerting information 23 8.4 Interactive services
24、. 24 8.5 Content delivery . 25 Rec. ITU-T H.781 (04/2015) 1 Recommendation ITU-T H.781 Digital signage: Functional architecture 1 Scope This Recommendation describes functional architecture for digital signage (DS) services as follows: architectural overview; functions and functional entities (FEs);
25、 reference points; information flows to support the services. This Recommendation extends the high-level architecture defined in ITU-T H.780 to accommodate various kinds of underlying transport infrastructures. This expansion covers interactive services amongst audience and terminal devices by using
26、 external devices such as touch panels. This Recommendation can be used as a reference for specifying protocols for DS services. 2 References The following ITU-T Recommendations and other references contain provisions which, through reference in this text, constitute provisions of this Recommendatio
27、n. 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 encouraged to investigate the possibility of applying the most recent edition of the Recommendations and other references lis
28、ted 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 document, the status of a Recommendation. ITU-T H.780 Recommendation ITU-T H.780 (2012), Digital signage: Service requireme
29、nts and IPTV-based architecture. 3 Definitions 3.1 Terms defined elsewhere This Recommendation uses the following terms defined elsewhere: 3.1.1 content ITU-T H.780: A combination of audio, still image, graphic, video, or data. NOTE Variety of formats is classified as the “data“ (e.g., text, encoded
30、 values, multimedia description language introduced by b-ITU-T H.760). 3.1.2 delivery ITU-T H.780: Sending of contents to terminal devices. 3.1.3 digital signage (DS) ITU-T H.780: A system that sends information, advertising and other messages to electronic devices (e.g., displays, speakers) in acco
31、rdance with the time of day and the location of the display, or the actions of audience. Content and its relevant information such as display schedules is delivered over networks. 3.1.4 network provider ITU-T H.780: The organization that maintains and operates the network components required to supp
32、ort a service or set of services. 3.1.5 overlay network b-ITU-T X.1162: An overlay network is a virtual network that runs on top of another network. Like any other network, the overlay network comprises a set of nodes and links between them. Because the links are logical ones, they may correspond to
33、 many physical links of the underlying network. 2 Rec. ITU-T H.781 (04/2015) 3.1.6 peer b-ITU-T X.1161: Communication node on P2P network that functions simultaneously as both “client“ and “server“ to the other nodes on the network. 3.1.7 peer-to-peer (P2P) b-ITU-T Y.2206: A system is considered to
34、be P2P if the nodes of the system share their resources in order to provide the service the system supports. The nodes in the system both provide services to other nodes and request services from other nodes. 3.1.8 playlist ITU-T H.780: Composed of a list of contents. NOTE 1 This data is created and
35、 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 content. 3.1.9 playlist schedule ITU-T H.780: Composed of a list of playlists indicated by a
36、 specific play date and/or time. 3.2 Terms defined in this Recommendation This Recommendation defines the following terms: 3.2.1 buffer map: Messages in peer-to-peer (P2P) networks that peers exchange to indicate which chunks of data a peer currently has buffered and can share with other peers. 3.2.
37、2 content delivery schedule: A schedule that describes time constraints of specific content to be delivered to terminal devices. NOTE Since content needs to be distributed to terminals prior to being displayed, the content delivery schedule may provide alternative ways for content delivery with spec
38、ific time constraints. 3.2.3 proof-of-play (PoP): Any technique that can identify and prove that the content has been displayed on the screen. 4 Abbreviations and acronyms This Recommendation uses the following abbreviations and acronyms: AM Audience Measurement CliCnf Client Configuration CliCnfMgm
39、 Client Configuration Management CliCntMgm Client Content Management CliInfMgm Client Information Management CliLogGen Client Log Generator CliLogMgm Client Log Management CliPlySch Client Play Scheduler CntDlvCliCtrl Content Delivery Client Control CntDlvLogMgm Content Delivery Log Management CntDl
40、vSchMgm Content Delivery Schedule Management CntDlvSvrCtrl Content Delivery Server Control CntIngReg Content Ingestion and Registration CntMtdMgm Content Metadata Management CntP2pPeer Content P2P Peer Rec. ITU-T H.781 (04/2015) 3 CntPly Content Player CntPrp Content Pre-process CntPullCli Content P
41、ull Client CntPullSvr Content Pull Server CntPushCli Content Push Client CntPushSvr Content Push Server DS Digital Signage DvcCtr Device Control DvcEvtRcv Device Event Receiver DvcStsMnr Device Status Monitor EvtDatCnv Event Data Converter FE Functional Entity IPTV Internet Protocol Television LogRp
42、tSch Log and Report Scheduler LytArr Layout Arrangement LytMgm Layout Management LytRnd Layout Rendering NIC Network Interface Card P2P Peer-to-Peer PlyLogGen Play Log Generator PlyLogMgm Play Log Management PlySchMgm Play Schedule Management PoP Proof-of-Play RegEvtDsp Registered Event Dispatcher S
43、MS Short message service SngSvcCtr Signage Service Control SngSvcMnr Signage Service Monitor StrMgm Storage Management SysAltCtr System Alert Control TTS Text-to-Speech 5 Conventions In this Recommendation: The keyword “functions“ is defined as a collection of functionalities. It is represented by t
44、he following symbol in this Recommendation: Functions 4 Rec. ITU-T H.781 (04/2015) The keyword “functional entity“ (FE) is defined as a group of functionalities that has not been further subdivided at the level of detail described in this Recommendation. It is represented by the following symbol in
45、this Recommendation: NOTE In the future, other groups or other Recommendations may possibly further subdivide these FEs. Frame borders of “functions“ and “FE“, and relational lines among “functions“ and “FE“ are drawn with solid lines or dashed lines. The solid lines mean required functionalities or
46、 relations. On the other hand, the dashed lines mean optional functionalities or relations. 6 Functional architecture of DS services This clause describes the detailed functional architecture for DS services by extending the high-level architecture defined in ITU-T H.780 for accommodating various ki
47、nds of underlying transport infrastructures and support of various new features described as follows. It is aligned with the requirements that are defined in ITU-T H.780: Support of a wide variety of content delivery methods: While both push and pull modes of content delivery are supported, this Rec
48、ommendation defines an alternative FE for P2P-based content delivery; Support of interaction with user through various peripheral devices: This Recommendation defines several FEs to support interactions with audiences by making use of external devices that are attached to the terminal devices; Defin
49、ition of reference points: This Recommendation defines reference points that are for further study for specifying mechanisms and protocols to be used for interoperability. 6.1 Overview of functional architecture of DS service Figure 1 shows an overview of functional architecture for DS services. This Recommendation covers interaction among an audience/user, a DS terminal device and a DS service operator. NOTE 1 In this Recommendation, “user“ means a person who
