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Antiope (teletext)

 

 
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Antiope (teletext)
 
 
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Antiope was a French
France

France , officially the French Republic , is a country whose Metropolitan France is located in Western Europe and that also comprises various Overseas departments and territories of France....
 teletext
Teletext

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....
 standard in the 1980s. Work on it started in 1975.

The nice-sounding term allegedly stood for Acquisition Numérique et Télévisualisation d’Images Organisées en Pages d’Écriture, which could be loosely translated as Digital Acquisition and Remote Visualization of Images Organized into Written Pages.

Antiope had a redefinable character set, which allowed more sophisticated displays than the BBC’s Ceefax
Ceefax

Ceefax is the BBC's teletext information service transmitted via the analogue signal, starting in 1974 and running until 2012.History ...
.






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Antiope was a French
France

France , officially the French Republic , is a country whose Metropolitan France is located in Western Europe and that also comprises various Overseas departments and territories of France....
 teletext
Teletext

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....
 standard in the 1980s. Work on it started in 1975.

The nice-sounding term allegedly stood for Acquisition Numérique et Télévisualisation d’Images Organisées en Pages d’Écriture, which could be loosely translated as Digital Acquisition and Remote Visualization of Images Organized into Written Pages.

Antiope had a redefinable character set, which allowed more sophisticated displays than the BBC’s Ceefax
Ceefax

Ceefax is the BBC's teletext information service transmitted via the analogue signal, starting in 1974 and running until 2012.History ...
. A decoder would typically take the form of an external set-top box
Set-top box

A set-top box or set-top unit is a information appliance that connects to a television and an external source of signal , turning the signal into content which is then displayed on the television screen....
, connected to the television set through its SCART
SCART

SCART is a France-originated standard and associated 21-pin connector for connecting audio-visual equipment together. It is also known as P?ritel , 21-pin EuroSCART and Euroconnector....
 connector.

A fundamental difference in technical philosophy between Antiope and Ceefax stemmed from the fact that Antiope was developed by telecommunications engineers, while Ceefax was developed by television engineers. This resulted in Antiope being a packet-switching system, with variable length packets of data, as might be used on a telephone network. By contrast, the BBC’s television engineers had a fixed amount of space in each of the two lines used from the television picture’s vertical blanking interval
Vertical blanking interval

The vertical blanking interval , also known as the vertical interval or VBLANK, is the time difference between the last line of one frame or field of a raster display, and the beginning of the next....
.

So each “packet” of data on Ceefax was a fixed size of 40 characters, based on the space available in one of the 625 lines of a PAL
PAL

PAL, short for Phase Alternating Line, is a color-encoding system used in broadcast television systems in large parts of the world. Other common analog television systems are SECAM and NTSC....
 (or SÉCAM
SECAM

SECAM, also written S?CAM , is an analog television system first used in France.A team led by Henri de France working at Compagnie Fran?aise de T?l?vision invented SECAM....
) television picture.

Antiope has been replaced by the European teletext, which was based on Ceefax. The replacement occurred before 1991 on France 2
France 2

France 2 is a France public national television network. It is part of the Public broadcasting France T?l?visions group, along with France 3, France 5, France ?, and the digital-only France 4....
 and France 3
France 3

France 3 is the second largest France public television channel and part of the France T?l?visions group, which also includes France 2, France 4, France 5, and France ?....
 and around 1992 on TF1
TF1

TF1 is a private France TV channel, controlled by TF1 Group, whose major share-holder is Bouygues. TF1's average market share of 25-35% makes it the most popular domestic network....
. Antiope vanished before teletext became popular in France.

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