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Teletext systems
:''This is a sub-article to Teletext.
Teletext (or "broadcast teletext") is a television information retrieval service developed in the United Kingdom in the early 1970s. It offers a range of text-based information, typically including national, international and sporting news, weather and TV schedules. Subtitle (or closed captioning) information is also transmitted in the teletext signal, typically on page 888 or 777.
A number of similar teletext services were developed in other countries, some of which attempted to address the limitations of the British-developed system, with its simple graphics and fixed page sizes.
==France: Antiope==
(詳細はSECAM standard is used in television broadcasting, a teletext system was developed in the late 1970s under the name ''Antiope''. It had a higher data rate and was capable of dynamic page sizes, allowing more sophisticated graphics. It was phased out in favour of standard teletext in 1991.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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