Teletext - définition. Qu'est-ce que Teletext
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Qu'est-ce (qui) est Teletext - définition

TELEVISION INFORMATION RETRIEVAL SERVICE DEVELOPED IN THE UNITED KINGDOM IN THE EARLY 1970S
HiText; Digital teletext; Text-tv; VBI Teletext; VBI teletext; Enhanced Computer Controlled Teletext; Computer Controlled Teletext; Fastext

teletext         
¦ noun a news and information service transmitted to televisions with appropriate receivers.
Teletext character set         
  • link=🬀
  • link=🬁
  • link=🬂
  • link=🬃
  • link=🬄
  • link=🬅
  • link=🬆
  • link=🬇
  • link=🬈
  • link=🬉
  • link=🬊
  • link=🬋
  • link=🬌
  • link=🬍
  • link=🬎
  • link=🬏
  • link=🬐
  • link=🬑
  • link=🬒
  • link=🬓
  • link=▌
  • link=🬔
  • link=🬕
  • link=🬖
  • link=🬗
  • link=🬘
  • link=🬙
  • link=🬚
  • link=🬛
  • link=🬜
  • link=🬝
  • link=🬞
  • link=🬟
  • link=🬠
  • link=🬡
  • link=🬢
  • link=🬣
  • link=🬤
  • link=🬥
  • link=🬦
  • link=🬧
  • link=▐
  • link=🬨
  • link=🬩
  • link=🬪
  • link=🬫
  • link=🬬
  • link=🬭
  • link=🬮
  • link=🬯
  • link=🬰
  • link=🬱
  • link=🬲
  • link=🬳
  • link=🬴
  • link=🬵
  • link=🬶
  • link=🬷
  • link=🬸
  • link=🬹
  • link=🬺
  • link=🬻
  • link=█
CHARACTER SET FOR VIEWDATA
This article covers technical details of the character encoding system defined by ETS 300 706, a standard for World System Teletext, and used for the Viewdata and Teletext variants of Videotex in Europe.
World System Teletext         
  • link=🬀
  • link=🬁
  • link=🬂
  • link=🬃
  • link=🬄
  • link=🬅
  • link=🬆
  • link=🬇
  • link=🬈
  • link=🬉
  • link=🬊
  • link=🬋
  • link=🬌
  • link=🬍
  • link=🬎
  • link=🬏
  • link=🬐
  • link=🬑
  • link=🬒
  • link=🬓
  • link=▌
  • link=🬔
  • link=🬕
  • link=🬖
  • link=🬗
  • link=🬘
  • link=🬙
  • link=🬚
  • link=🬛
  • link=🬜
  • link=🬝
  • link=🬞
  • link=🬟
  • link=🬠
  • link=🬡
  • link=🬢
  • link=🬣
  • link=🬤
  • link=🬥
  • link=🬦
  • link=🬧
  • link=▐
  • link=🬨
  • link=🬩
  • link=🬪
  • link=🬫
  • link=🬬
  • link=🬭
  • link=🬮
  • link=🬯
  • link=🬰
  • link=🬱
  • link=🬲
  • link=🬳
  • link=🬴
  • link=🬵
  • link=🬶
  • link=🬷
  • link=🬸
  • link=🬹
  • link=🬺
  • link=🬻
  • link=█
  • Teletext Level 2.5 test
  • Comparison between teletext Level 1.0 and teletext Level 2.5.
  • Comparison between teletext Level 1.0 and teletext Level 2.5.
  • Comparison between Teletext level 1 and 1.5; note the replacement of ӧ with ø.
TELETEXT STANDARD
CCIR Teletext System B; Teletext System B; Alpha-mosaic character; Alpha-mosaic; World Standard Teletext
World System Teletext (WST) is the name of a standard for encoding and displaying teletext information, which is used as the standard for teletext throughout Europe today. It was adopted into the international standard CCIR 653 (now ITU-R BT.

Wikipédia

Teletext

Teletext, or broadcast teletext, is a standard for displaying text and rudimentary graphics on suitably equipped television sets. Teletext sends data in the broadcast signal, hidden in the invisible vertical blanking interval area at the top and bottom of the screen. The teletext decoder in the television buffers this information as a series of "pages", each given a number. The user can display chosen pages using their remote control. In broad terms, it can be considered as Videotex, a system for the delivery of information to a user in a computer-like format, typically displayed on a television or a dumb terminal, but that designation is usually reserved for systems that provide bi-directional communication, such as Prestel or Minitel.

Teletext was created in the United Kingdom in the early 1970s by John Adams, Philips' lead designer for video display units. Public teletext information services were introduced by major broadcasters in the UK, starting with the BBC's Ceefax service in 1974. It offered a range of text-based information, typically including news, weather and TV schedules. Also, paged subtitle (or closed captioning) information was transmitted using the same system. Similar systems were subsequently introduced by other television broadcasters in the UK and mainland Europe in the following years. Meanwhile, the UK's General Post Office introduced the Prestel system using the same display standards but run over telephone lines using bi-directional modems rather than the send-only system used with televisions.

Teletext formed the basis for the World System Teletext standard (CCIR Teletext System B), an extended version of the original system. This standard saw widespread use across Europe starting in the 1980s, with almost all televisions sets including a decoder. Other standards were developed around the world, notably NABTS (CCIR Teletext System C) in the United States, Antiope (CCIR Teletext System A) in France and JTES (CCIR Teletext System D) in Japan, but these were never as popular as their European counterpart and most closed by the early 1990s.

Most European teletext services continued to exist in one form or another until well into the 2000s when the expansion of the Internet precipitated a closure of some of them. However, many European television stations continue to provide teletext services and even make teletext content available via web and dedicated apps.

The recent availability of digital television has led to more advanced systems being provided that perform the same task, such as MHEG-5 in the UK, and Multimedia Home Platform.

Exemples du corpus de texte pour Teletext
1. The icing on the cake, is that about 50% of "teletext" pages are missing from all the Freeview stations compared to the analogue teletext pages.
2. Only 6 per cent of people can confidently sing the Hogmanay favourite, a Teletext survey shows.
3. Outside his office on the ground floor, reporters‘ material is slimmed into Teletext bulletins ("An excellent subediting exercise," he says.
4. A survey of 2,000 adults for Teletext Holidays found that one in four cannot switch off entirely from their job when they are on vacation.
5. A survey by Teletext holidays of more than 2,500 workers pinpoints December 14 as the day when the party season really takes hold.