Globally Executable MHP
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Globally Executable MHP (GEM) is a
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.
History
A few years ago, the DVB project started the development of a
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
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,
- the OpenCable Application Platform (OCAP / tru2way), which is an Interactive television (iTV) middleware software layer for US cable,
- the ATSC,
- GEM-IPTV, a version of GEM developed by DVB intended for telco-based networks,
- the ARIB B.23 ARIB,
- the PAE [5] specification in the Open IPTV Forum,
- 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
- Digital Video Broadcasting
- Hybrid Broadcast Broadband TV
- 10-foot user interface
- Enhanced TV
- Interactive television
- Over-the-top content
External links
- Official GEM and MHP website
- Digital Video Broadcasting
- European Telecommunications Standards Institute
- The Online ITV Dictionary
References
- ^ 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.{{cite web}}: 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