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| title | chunk | source | category | tags | date_saved | instance |
|---|---|---|---|---|---|---|
| Interactive television standards | 2/2 | https://en.wikipedia.org/wiki/Interactive_television_standards | reference | science, encyclopedia | 2026-05-05T08:25:07.444979+00:00 | kb-cron |
- Interactive Broadcast: incorporates bidirectional communications via a backward IP channel towards the STB, allowing the download of applications.
- Enhanced Broadcast Profile: interactive applications are downloaded via broadcasting. This does not incorporate a backward channel into the STB.
- Internet Access: The STB itself processes internet content, without broadcasting. There exist two versions that cover the mentioned profiles:
MHP 1.0 covers the first two profiles. This version is used most by modern receivers, and the majority implement the Interactive Broadcast profile. Many countries such as Spain, Italy and Finland have adopted it into their DTV's interactive services. MHP 1.1 covers all three profiles, but it is not found in most commercial receivers because there are limited compatible protocols.
=== OCAP === The American company CableLabs collaborated with DVB for the creation of a new open standard, which led to the acceptance of MHP as a base for OCAP standard (OpenCable Application Platform), in January 2002. With MHP as its center, OCAP provides a common specification for the middleware layer in the cable systems within the United States. Since DVB standards are not used in the United States, OCAP is based on parts that are not DVB-specific, replacing DVB-specific parts with others. Originally, OCAP was based on the 1.0.0 version of the MHP standard. Later, DVB presented the specification Globally Executable MHP (GEM) to facilitate the use of MHP's elements in other standards. OCAP's most recent versions use GEM instead of MHP as their base, but they still refer to some MHP elements that are not included in the GEM specification.
=== ACAP (Advanced Common Application Platform) === ACAP was created by the Advanced Television Systems Committee (ATSC) as a common base for all systems of interactive TV in USA, via cable, terrestrial, or satellite. It is also based on GEM while adding some of OCAP's elements adapted for the USA market.
== See also == Hybrid Broadcast Broadband TV Project Canvas Open IPTV Forum Teletext Videotex Ceefax Minitel
== Further reading == MHP: https://web.archive.org/web/20060421101018/http://www.mhp.org/ MHEG: https://www.mheg.org/ Canal+ Technologies: https://web.archive.org/web/20071223011417/http://www.canalplus-technologies.com/ Open TV: http://www.opentv.com Archived 2007-12-13 at the Wayback Machine Steven Morris and Anthony Smith-Chaigneau, "Interactive TV Standards: A Guide to MHP, OCAP, and JavaTV". Elsevier 2005.
== References ==