Globally Executable MHP (GEM) is a DVB specification of a Java based middleware for TV broadcast receivers, IPTV terminals and Blu-ray players. GEM is an ETSI standard (ETSI TS 102 819, ETSI TS 102 728[1]) and an ITU "Recommendation” (ITU-T J.202). GEM defines a set of common functionalities which are independent from the signaling and protocols of a specific transmission network and enables to write interoperable Java applications for TV. GEM is not intended to be directly implemented, but rather forms the basis for broader specifications targeting a particular network infrastructure (e.g. US cable) or class of device (e.g. Blu-ray Disc players). GEM defines profiles for different device classes (targets) – these define the set of available features of GEM for this device class. Currently GEM defines targets (API profiles) for broadcast, packaged media (Blu-Ray) and IPTV. Combinations of these targets can be combined into a hybrid GEM platform, which enables to build devices with multiple network interfaces, such as a combined broadcast/IPTV set-top box.
A few years ago, the DVB project started the development of a Java-based application platform (a set of APIs), called MHP,[2] intended to support software applications running on digital television platforms. Such applications could include Electronic Program Guides (EPG's), interactivity, Video on Demand (VOD), email through your television, etc. The MHP specification defines the download of MHP applications ("xlets") over transmission networks based on other DVB specifications (i.e. over-the-air or terrestrial networks using DVB-T, satellite networks using DVB-S, cable networks using DVB-C). As other specification bodies such as CableLabs and the Blu-ray Disc Association chose to base their own DTV software standards on MHP it became necessary to define a subset of MHP which removes the transmission-related elements of the MHP specification but retains the application API's, thus allowing broad content compatibility across a range of delivery platforms. In January 2010, the DVB project made GEM the primary middleware specification and released a self-contained version of GEM in ETSI TS 102 728,[1] citing MHP only as one of many already-existing implementations.
Platformsedit
At the time of writing, the following platforms are defined, which base on/extend GEM:
the Multimedia Home Platform (MHP),[2] the open, multi-platform middleware specification developed by the DVB project,
As all these platforms are based on the common GEM-core, making it possible to write Java applications that will run interoperably on all these systems.
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globally, executable, this, article, needs, additional, citations, verification, please, help, improve, this, article, adding, citations, reliable, sources, unsourced, material, challenged, removed, find, sources, news, newspapers, books, scholar, jstor, augus. This article needs additional citations for verification Please help improve this article by adding citations to reliable sources Unsourced material may be challenged and removed Find sources Globally Executable MHP news newspapers books scholar JSTOR August 2008 Learn how and when to remove this template message Globally Executable MHP GEM is a DVB specification of a Java based middleware for TV broadcast receivers IPTV terminals and Blu ray players GEM is an ETSI standard ETSI TS 102 819 ETSI TS 102 728 1 and an ITU Recommendation ITU T J 202 GEM defines a set of common functionalities which are independent from the signaling and protocols of a specific transmission network and enables to write interoperable Java applications for TV GEM is not intended to be directly implemented but rather forms the basis for broader specifications targeting a particular network infrastructure e g US cable or class of device e g Blu ray Disc players GEM defines profiles for different device classes targets these define the set of available features of GEM for this device class Currently GEM defines targets API profiles for broadcast packaged media Blu Ray and IPTV Combinations of these targets can be combined into a hybrid GEM platform which enables to build devices with multiple network interfaces such as a combined broadcast IPTV set top box Contents 1 History 2 Platforms 3 See also 4 External links 5 ReferencesHistory editA few years ago the DVB project started the development of a Java based application platform a set of APIs called MHP 2 intended to support software applications running on digital television platforms Such applications could include Electronic Program Guides EPG s interactivity Video on Demand VOD email through your television etc The MHP specification defines the download of MHP applications xlets over transmission networks based on other DVB specifications i e over the air or terrestrial networks using DVB T satellite networks using DVB S cable networks using DVB C As other specification bodies such as CableLabs and the Blu ray Disc Association chose to base their own DTV software standards on MHP it became necessary to define a subset of MHP which removes the transmission related elements of the MHP specification but retains the application API s thus allowing broad content compatibility across a range of delivery platforms In January 2010 the DVB project made GEM the primary middleware specification and released a self contained version of GEM in ETSI TS 102 728 1 citing MHP only as one of many already existing implementations Platforms editAt the time of writing the following platforms are defined which base on extend GEM the Multimedia Home Platform MHP 2 the open multi platform middleware specification developed by the DVB project the OpenCable Application Platform OCAP tru2way which is an Interactive television iTV middleware software layer for US cable the Advanced Common Application Platform ACAP 3 from North America s ATSC GEM IPTV a version of GEM developed by DVB intended for telco based networks the ARIB B 23 4 specification from Japan s ARIB the PAE 5 specification in the Open IPTV Forum BD J the Java platform for the Blu ray Disc As all these platforms are based on the common GEM core making it possible to write Java applications that will run interoperably on all these systems See also edit nbsp Television portalDigital Video Broadcasting Hybrid Broadcast Broadband TV 10 foot user interface Enhanced TV Interactive television Over the top contentExternal links editOfficial GEM and MHP website Digital Video Broadcasting European Telecommunications Standards Institute The Online ITV DictionaryReferences edit a b GEM 1 2 2 ETSI TS 102 728 v 1 1 1 February 2010 Available at http www etsi org deliver etsi ts 102700 102799 102728 01 01 01 60 ts 102728v010101p pdf a b MHP 1 2 2 ETSI TS 102 727 v 1 1 1 February 2010 Available at http www etsi org deliver etsi ts 102700 102799 102727 01 01 01 60 ts 102727v010101p pdf ACAP A 101a February 2009 Available at Archived copy PDF Archived from the original PDF on 2010 11 20 Retrieved 2010 10 26 a href Template Cite web html title Template Cite web cite web a CS1 maint archived copy as title link ARIB B 23 V1 1 February 2004 and V1 2 July 2009 Available at http www arib or jp english html overview doc 6 STD B23v1 1 E1 pdf Procedural Application Environment 2 0 of the Open IPTV Forum September 2010 Available at http www oipf org docs Release2 OIPF T1 R2 Specification Volume 6 Procedural Application Environment v2 0 2010 09 07 pdf Retrieved from https en wikipedia org w index php title Globally Executable MHP amp oldid 1182178883 Platforms, wikipedia, wiki, book, books, library,
