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Globally Executable MHP
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<h2 id="history">History</h2> <p>A few years ago, the DVB project started the development of a <a href="/facts/Java_(Sun)/fpn6x8WL">Java</a>-based application platform (a set of APIs), called <a href="/facts/Multimedia_Home_Platform/jhd9UvfQ">MHP</a>,<a class="footnote-ref" id="fnref:2" href="#fn:2"><sup>2</sup></a> intended to support software applications running on digital television platforms. Such applications could include <a href="/facts/Electronic_Program_Guide/91vTJyHK">Electronic Program Guides</a> (EPG's), interactivity, <a href="/facts/Video_on_Demand/jWQq1o80">Video on Demand</a> (VOD), email through your television, etc. The MHP specification defines the download of MHP applications ("<a href="/facts/Xlets/7BonGtwn">xlets</a>") over transmission networks based on other DVB specifications (i.e. over-the-air or terrestrial networks using <a href="/facts/DVB-T/oLaP9twt">DVB-T</a>, satellite networks using <a href="/facts/DVB-S/5IM9wfeu">DVB-S</a>, cable networks using <a href="/facts/DVB-C/Q0x5czql">DVB-C</a>). As other specification bodies such as <a href="/facts/CableLabs/jXu01KGU">CableLabs</a> and the <a href="/facts/Blu-ray_Disc_Association/yf4GM6EA">Blu-ray Disc Association</a> chose to base their own <a href="/facts/Digital_television/KQCyILQa">DTV</a> 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 <a href="/facts/API/GMlN4vUr">API</a>'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,<a class="footnote-ref" id="fnref:3" href="#fn:3"><sup>3</sup></a> citing MHP only as one of many already-existing implementations. </p> <h2 id="platforms">Platforms</h2> <p>At the time of writing, the following platforms are defined, which base on/extend GEM: </p> <ul><li>the <a href="/facts/Multimedia_Home_Platform/jhd9UvfQ">Multimedia Home Platform</a> (MHP),<a class="footnote-ref" id="fnref:4" href="#fn:4"><sup>4</sup></a> the open, multi-platform middleware specification developed by the DVB project,</li> <li>the <a href="/facts/OpenCable_Application_Platform/2kfhIMR3">OpenCable Application Platform</a> (OCAP / <a href="/facts/Tru2way/nbdIXK6m">tru2way</a>), which is an <a href="/facts/Interactive_television/09p5bXuj">Interactive television</a> (iTV) middleware software layer for US cable,</li> <li>the <a href="/facts/Advanced_Common_Application_Platform/6rNpv1Kn">Advanced Common Application Platform</a> (ACAP)<a class="footnote-ref" id="fnref:5" href="#fn:5"><sup>5</sup></a> from North America's <a href="/facts/ATSC/RIYWmB7v">ATSC</a>,</li> <li>GEM-IPTV, a version of GEM developed by DVB intended for telco-based networks,</li> <li>the ARIB B.23 <a class="footnote-ref" id="fnref:6" href="#fn:6"><sup>6</sup></a> specification from Japan's <a href="/facts/ARIB/jVw0Szbk">ARIB</a>,</li> <li>the PAE <a class="footnote-ref" id="fnref:7" href="#fn:7"><sup>7</sup></a> specification in the <a href="/facts/Open_IPTV_Forum/akmVqBCc">Open IPTV Forum</a>,</li> <li><a href="/facts/BD-J/glGkeo4f">BD-J</a> the Java-platform for the <a href="/facts/Blu-ray_Disc/zyPalhfG">Blu-ray Disc</a>.</li></ul> <p>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. </p> <h2 id="see-also">See also</h2> <ul> <li>Television portal</li></ul> <ul><li><a href="/facts/Digital_Video_Broadcasting/KPGNTGBJ">Digital Video Broadcasting</a></li> <li><a href="/facts/Hybrid_Broadcast_Broadband_TV/YodRGUIt">Hybrid Broadcast Broadband TV</a></li> <li><a href="/facts/10-foot_user_interface/FqfaXmbw">10-foot user interface</a></li> <li><a href="/facts/Enhanced_TV/4WRVE7WD">Enhanced TV</a></li> <li><a href="/facts/Interactive_television/09p5bXuj">Interactive television</a></li> <li><a href="/facts/Over-the-top_content/pVfcCWfe">Over-the-top content</a></li></ul> <h2 id="external-links">External links</h2> <ul><li><a href="https://web.archive.org/web/20060421101018/http://www.mhp.org/">Official GEM and MHP website</a></li> <li><a href="http://www.dvb.org">Digital Video Broadcasting</a></li> <li><a href="http://www.etsi.org">European Telecommunications Standards Institute</a></li> <li><a href="http://www.itvdictionary.com/g.html">The Online ITV Dictionary</a></li></ul> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>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 href="http://www.etsi.org/deliver/etsi_ts/102700_102799/102728/01.01.01_60/ts_102728v010101p.pdf" target="_blank">http://www.etsi.org/deliver/etsi_ts/102700_102799/102728/01.01.01_60/ts_102728v010101p.pdf</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> <li id="fn:2"><p>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 <a href="http://www.etsi.org/deliver/etsi_ts/102700_102799/102727/01.01.01_60/ts_102727v010101p.pdf" target="_blank">http://www.etsi.org/deliver/etsi_ts/102700_102799/102727/01.01.01_60/ts_102727v010101p.pdf</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li> <li id="fn:3"><p>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 href="http://www.etsi.org/deliver/etsi_ts/102700_102799/102728/01.01.01_60/ts_102728v010101p.pdf" target="_blank">http://www.etsi.org/deliver/etsi_ts/102700_102799/102728/01.01.01_60/ts_102728v010101p.pdf</a> <a href="#fnref:3" class="footnote-back-ref">↩</a></p></li> <li id="fn:4"><p>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 <a href="http://www.etsi.org/deliver/etsi_ts/102700_102799/102727/01.01.01_60/ts_102727v010101p.pdf" target="_blank">http://www.etsi.org/deliver/etsi_ts/102700_102799/102727/01.01.01_60/ts_102727v010101p.pdf</a> <a href="#fnref:4" class="footnote-back-ref">↩</a></p></li> <li id="fn:5"><p>ACAP A 101a (February 2009) Available at: "Archived copy" (PDF). Archived from the original (PDF) on 2010-11-20. Retrieved 2010-10-26.{{cite web}}: CS1 maint: archived copy as title (link) <a href="https://web.archive.org/web/20101120205310/http://atsc.org/cms/standards/a_101a.pdf" target="_blank">https://web.archive.org/web/20101120205310/http://atsc.org/cms/standards/a_101a.pdf</a> <a href="#fnref:5" class="footnote-back-ref">↩</a></p></li> <li id="fn:6"><p>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 <a href="http://www.arib.or.jp/english/html/overview/doc/6-STD-B23v1_1-E1.pdf" target="_blank">http://www.arib.or.jp/english/html/overview/doc/6-STD-B23v1_1-E1.pdf</a> <a href="#fnref:6" class="footnote-back-ref">↩</a></p></li> <li id="fn:7"><p>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 <a href="http://www.oipf.org/docs/Release2/OIPF-T1-R2-Specification-Volume-6-Procedural-Application-Environment-v2_0-2010-09-07.pdf" target="_blank">http://www.oipf.org/docs/Release2/OIPF-T1-R2-Specification-Volume-6-Procedural-Application-Environment-v2_0-2010-09-07.pdf</a> <a href="#fnref:7" class="footnote-back-ref">↩</a></p></li> </ol>