1、 ANSI/CEA Standard OpenEPG A Specification for Electronic Program Guide Data Interchange ANSI/CEA-2033 March 2008 NOTICE Consumer Electronics Association (CEA) Standards, Bulletins and other technical publications are designed to serve the public interest through eliminating misunderstandings betwee
2、n manufacturers and purchasers, facilitating interchangeability and improvement of products, and assisting the purchaser in selecting and obtaining with minimum delay the proper product for his particular need. Existence of such Standards, Bulletins and other technical publications shall not in any
3、respect preclude any member or nonmember of CEA from manufacturing or selling products not conforming to such Standards, Bulletins or other technical publications, nor shall the existence of such Standards, Bulletins and other technical publications preclude their voluntary use by those other than C
4、EA members, whether the standard is to be used either domestically or internationally. Standards, Bulletins and other technical publications are adopted by CEA in accordance with the American National Standards Institute (ANSI) patent policy. By such action, CEA does not assume any liability to any
5、patent owner, nor does it assume any obligation whatever to parties adopting the Standard, Bulletin or other technical publication. This CEA Standard is considered to have International Standardization implication, but the International Electrotechnical Commission activity has not progressed to the
6、point where a valid comparison between the CEA Standard and the IEC document can be made. This Standard does not purport to address all safety problems associated with its use or all applicable regulatory requirements. It is the responsibility of the user of this Standard to establish appropriate sa
7、fety and health practices and to determine the applicability of regulatory limitations before its use. (Formulated under the cognizance of the CEAs R7 Home Network Committee.) Published by CONSUMER ELECTRONICS ASSOCIATION 2008 Technology to video on demand (VOD) services; and to content stored local
8、ly on a home networked device. OpenEPG allows for aggregation of metadata provided by multiple sources such as various metadata service providers (MSPs,) including small and local MSPs (such as churches, schools, etc.), and personal metadata for content provided by a user. This standard defines the
9、format and structure of OpenEPG data fields, and it defines methods of querying OpenEPG metadata services to request subsets of the available data. Electronic versions of the complete OpenEPG XML schemas and example files can be obtained from CEA 24. This standard leverages the field structures used
10、 in the TVAnytime field set, but extends their use for the North American broadcast, cable and satellite infrastructure and conventions. This standard uses other common field structures, such MPEG-7, to the fullest extent possible. 1.2 General Capabilities This standard enables the following capabil
11、ities: Enables devices to communicate using messages based upon IP protocols. Provides mechanisms that enable applications to tune to content. Provides mechanisms that enable applications to record content. Limits complexity to allow small providers to create and define program metadata elements. Pr
12、ovides alignment with existing DLNA architecture for in-home network device interaction. Provides methods of filtering EPG data for a particular geographical area (“localization”) Provides optional methods for user and/or device authentication and secure data communications with the EPG MSP. The fol
13、lowing capabilities have been identified for future consideration. OpenEPG is a trade mark owned by the Consumer Electronics Association (CEA). Use of this term in descriptions of products or services conforming to this standard is permissible as long as it is accompanied by attribution. CEA-2033 2
14、Methods that facilitate alternate business models for EPG MSPs, e.g. a method of preserving advertising content. 1.3 Background and Usage Models The OpenEPG specification enables the exchange of media-content metadata between MSPs and CE equipment, and between devices on a home network through stand
15、ardized formats and protocols. The goal of the OpenEPG initiative is to stimulate innovation in the applications and user experiences that utilize this metadata and to encourage the development of a robust set of products and services that can help users navigate and enjoy the increasingly diverse m
16、edia content that is now becoming available to them. In formulating the requirements for this specification, two classes of OpenEPG use-case were considered Direct Access and Indirect Access. Figure 1 illustrates a typical Direct Access scenario: Figure 1 - Typical Direct Access Scenario Terrestrial
17、 TV Broadcaster A Broadcaster BCATV Service OpenEPG Service Metadata Service Provider Internet OpenEPG Service CEA-2033 3 The user owns multiple digital televisions (DTVs), subscribes to a Cable TV service, and receives over-the-air television programming from multiple broadcasters. The DTVs are IP-
18、enabled and are connected to a broadband Internet service via a home network. The user has also subscribed to an OpenEPG metadata service provided by a Metadata Service Provider (MSP). The user can access the MSP service directly from each DTV in the home. (Subscription mechanisms are outside the sc
19、ope of this standard.) The MSPs OpenEPG service delivers detailed EPG metadata for content available from the Cable TV service or the OTA broadcasts. Additional content sources, delivery technologies, and types of CE device can be accommodated, and the user may subscribe to more than one OpenEPG met
20、adata service. (In this case, another application would aggregate the metadata for display to the user). The user browses the received EPG metadata to make current and future viewing decisions, and may use it to facilitate scheduled recording of selected programs. Figure 2 shows a typical Indirect A
21、ccess scenario: Figure 2 Typical Indirect Access Scenario SATV Provider Supporting OpenEPG Content and OpenEPG Compatible Metadata Service SATV over the Home Network w/ OpenEPG Service Multi-stream, Network-Enabled Receiver/Server w/ OpenEPG Support CEA-2033 4 In this particular scenario, the user o
22、wns multiple digital televisions (DTVs), and subscribes to a digital satellite service (DSS) that supports home networking features and OpenEPG. The DTVs are IP-enabled and are connected to the DSS receiver via the home network. Both media content and metadata flows from the service provider to the
23、DSS receiver and is delivered to each of the DTVs via IP transport over the home network. The user browses the metadata to make current and future viewing decisions and optionally uses the metadata to facilitate scheduled recording of selected programs. The OpenEPG metadata service provides event in
24、formation as well as detailed metadata. Note that additional content receivers (renderers and/or storage devices), delivery technologies (additional satellite, OTA, or cable), and other types of CE devices could also be accommodated, and the user could receive metadata from more than one MSP. In the
25、 latter case, an application would aggregate the metadata for display to the user. Scenarios that combine direct and indirect access methodologies can also be envisioned where applications on the CE device aggregate the metadata to provide a rich user experience. 1.4 Principles of Operation See Figu
26、re 3 for an illustration of how OpenEPG is used in both direct and indirect access scenarios. CEA-2033 5 Figure 3 Flow of Direct and Indirect Access Scenarios CEA-2033 6 2 References 2.1 Normative References The following standards contain provisions that, through reference in this text, constitute
27、normative provisions of this standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards listed. 1
28、ATSC Standard A/65C Program and System Information Protocol for Terrestrial Broadcast and Cable, Rev. C, with Amendment No. 1, May 9, 2006 (http:/www.atsc.org/standards/a_65cr1_with_amend_1.pdf) 2 CEA-CEB16 Active Format Description (AFD) Part 2: System Description, January 2006 7 ETSI TS 102 822-3-
29、1 Title: 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 - Metadata schemas, January 2006 8 ETSI TS 102 822-6-1 Title: Broadcast and On-line Services: Search, select, and rightful use of con
30、tent on personal storage systems (“TV-Anytime Phase 1“); Part 6: Delivery of metadata over a bi-directional network; Sub-part 1: Service and transport, January 2006 9 ETSI TS 102 822-6-2 (2006-01) Title: Broadcast and On-line Services: Search, select, and rightful use of content on personal storage
31、systems (“TV-Anytime Phase 1“); Part 6: Delivery of metadata over a bi-directional network; Sub-part 2: Service discovery, January 2006 10 IETF RFC 2616, HyperText Transfer Protocol HTTP 1.1, June 1999 11 IETF RFC 2617 HTTP Authentication: Basic Digest Access Authentication, June 1999 12 IETF RFC 46
32、46 Tags for Identifying Languages, February 2006 13 IETF RFC 4078 The TV-Anytime Content Reference Identifier (CRID), May 2005 14 IETF RFC 4246 International Standard Audio Visual Number (ISAN) URN Definition, February 2006 15 ISO 15706:2002 Information and Documentation - International Standard Aud
33、iovisual Number (ISAN) 16 ISO 639-1:2002 Codes for the representation of names of languages - Part 1: Alpha-2 code, CEA-2033 7 17 ISO 639-2:2007 Codes for the representation of names of languages - Part 2: Alpha-3 code for comprehensive coverage of languages 18 ISO/IEC 15938:2005 Information technol
34、ogy - Multimedia Content Description Interface, Parts 1-10 (MPEG-7) 19 ISO/IEC 15938-5:2003, Information Technology - Multimedia Content Description Interface - Part 5: Multimedia Description Schemes. 20 W3C Recommendation 24 December 1999, HTML 4.01 specification, http:/www.w3c.org/TR/1999/REC-html
35、401-19991224 21 W3C Recommendation 24 June 2003, SOAP Version 1.2 Part 1: Messaging Framework 22 “Extensible Markup Language (XML) 1.0 (Fourth Edition) W3C Recommendation 16 August 2006, edited in place 29 September 2006” http:/www.w3.org/TR/2006/REC-xml-20060816/ 2.2 Informative References 23 ETSI
36、EN 300 468, Edition: 1.7.1(2006-05) Specification for Service Information (SI) in DVB systems (DVB SI) (http:/webapp.etsi.org/action/PU/20060523/en_300468v010701p.pdf) 24 Electronic versions of the complete OpenEPG XML Schemas and Example Files 2.3 Reference Acquisition ATSC Standards: 1750 K Street
37、, NW, Suite 1200, Washington DC, 20006 USA, Phone: +1-202-872-9160, Fax: +1-202-872-9161, Internet: Email: http:/www.atsc.org/, atscatsc.org CEA Standards: Global Engineering Documents, World Headquarters, 15 Inverness Way East, Englewood, CO USA 80112-5776; Phone 800-854-7179; Fax 303-397-2740; Int
38、ernet http:/ ; E-mail CEA-2033 OpenEPG XML Schemas and Example files: Consumer Electronics Association, 1919 South Eads Street, Arlington, VA USA 22202; Phone 703-907-7625; Fax 703-907-7693; Internet www.CE.org ; E-mail standardsCE.org DLNA Documents: Digital Living Network Alliance (DLNA) Administ
39、ration, C/O VTM, Attn: Membership Services. 5440 SW Westgate Drive, Suite217, Portland, OR 97221 USA Phone: 503.297.0426, Fax: 503.297.1090, Internet: http:/www.dlna.org/ , Email: admindlna.org ETSI Standards: CEA-2033 8 ETSI Secrtariat, 650, route des Lucioles, 06921 Sophia-Antipolis Cedex, FRANCE,
40、 Tel.: +33 (0)4 92 94 42 00, Fax: +33 (0)4 93 65 47 16, Internet: http:/www.etsi.org/#, Email: helpdesketsi.org IETF Documents: Internet Engineering Task Force (IETF) Secretariat, c/o Corporation for National Research Initiatives, 1895 Preston White Drive, Suite 100, Reston, VA 20191-5434, USA; Phon
41、e 703- 620-8990; Fax 703-620-9071; Internet www.ietf.org, IETF RFCs may be downloaded from www.ietf.org/rfc.html, IETF Internet drafts may be downloaded from www.ietf.org/ID.html ISO Standards ISO Central Secretariat: International Organization for Standardization (ISO); 1, rue de Varemb, Case posta
42、le 56; CH-1211 Geneva 20, Switzerland; Telephone +41 22 749 01 11; Fax +41 22 733 34 30; http:/www.iso.org W3C Documents: World Wide Web Consortium (W3C); Internet: http:/www.w3.org/ 3 Conventions and Definitions 3.1 Conventions Several keywords are used to differentiate levels of requirements and o
43、ptionality, as follows: MAY: A keyword that indicates flexibility of choice with no implied preference. SHALL: A keyword that indicates a mandatory requirement. Designers are required to implement all such mandatory requirements to assure interoperability with other products conforming to this stand
44、ard. SHOULD: A keyword that denotes flexibility of choice with a strongly preferred alternative. Equivalent to the phrase “is recommended.” Occurs: Mandatory elements defined in types, that is Occurs equals 1 or more, are dependent upon the use of the type in another element. A child element is only
45、 mandatory if its type is instantiated in another element where actual data exists. In addition XML 22 establishes mandatory requirements that are equivalent to SHALL. 3.2 Definitions CEA-2033 9 For the purposes of this standard, the following definitions apply: Content Service Provider (CSP): A ser
46、vice that provides actual Audio/Video content. The service MAY also provide MetaData related to the content they provide. General Queries: Any OpenEPG data query. Particularly that does not conform to one of the predefined Template Queries. A Metadata Service Provider that indicates that it will acc
47、ept General Queries SHALL accept all legal query expressions. Metadata Service Provider (MSP): A service that provides MetaData for Audio/Video content provided by other services. OpenEPG A standard defining a language and access protocol for expressing Electronic Program Guide information. OpenEPG
48、Web Services OpenEPG access protocols over the WAN (?) Request Template a predefined query format for data requests. Response Template a predefined list of fields that MAY be returned by a data request. Service can come from MSP or CDS 3.2.1 Abbreviations/Acronyms For the purposes of this standard,
49、the following abbreviations/acronyms apply: ANSI -American National Standards Institute ATSC - Advanced Television Systems Committee CATV - Cable TeleVision CDS - Content Delivery Service CE - Consumer Electronics CRID - Content Reference ID CSP - Content Service Provider DDD - Device Description Documents DLNA - Digital Living Network Alliance DSMCC - Digital Storage Media Control and Command DSS - Digital Satellite Service DTV
