Teletext: Difference between revisions
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Teletext / Videotext is an information retrieval service provided by television broadcast companies |
Teletext / Videotext is an information retrieval service provided by television broadcast companies, most popularly in Europe, which provides both informational pages and captions or subtitles to television programs. In 1992, teletext was provided in 18 countries. |
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==Analogue TV== |
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In the PAL standard, [[Teletext]] and Caption data is digitally encoded in the [[VBI]] on lines 17 through 20. |
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==Digital television (DTV) == |
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The European standards [http://www.etsi.org ETSI EN 300 472] "Specification for conveying ITU-R System B Teletext in DVB bitstreams" and [http://www.etsi.org ETSI EN 301 775] "Specification for the carriage of Vertical Blanking Information (VBI) data in DVB bitstreams". |
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The DVB standard transmits sliced VBI data in a separate elementary stream. |
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==Also See== |
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* [[Text capture]] |
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* [[Red Button]] |
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* [[MHEG-5]] |
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* [[Multimedia Home Platform]] |
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==External Links== |
==External Links== |
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* [[Wikipedia:Teletext|Wikipedia's Teletext article]] contains general information on Teletext |
* [[Wikipedia:Teletext|Wikipedia's Teletext article]] contains general information on Teletext |
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* [[Wikipedia:Videotext|Videotext]]: an alternate name |
* [[Wikipedia:Videotext|Videotext]]: an alternate name |
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[[Category:Technology]] |
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Latest revision as of 23:49, 17 October 2011
Teletext / Videotext is an information retrieval service provided by television broadcast companies, most popularly in Europe, which provides both informational pages and captions or subtitles to television programs. In 1992, teletext was provided in 18 countries.
Analogue TV
In the PAL standard, Teletext and Caption data is digitally encoded in the VBI on lines 17 through 20.
Digital television (DTV)
The European standards ETSI EN 300 472 "Specification for conveying ITU-R System B Teletext in DVB bitstreams" and ETSI EN 301 775 "Specification for the carriage of Vertical Blanking Information (VBI) data in DVB bitstreams".
The DVB standard transmits sliced VBI data in a separate elementary stream.
Also See
External Links
- Wikipedia's Teletext article contains general information on Teletext
- Videotext: an alternate name