The Origins and Development of Teletext Technology
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aqua_worm_hole
9mo ago· 17 min readenNews
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Summary
The article explores the origins and development of teletext technology, beginning with John Adams' 1971 proposal to use the TV signal's invisible part for closed captions. It details the collaboration between UK government bodies, leading to the launch of Ceefax and ORACLE, and mentions the videotex-standard Prestel.
Key quotes
· 3 pulledIn 1971, Philip’s engineer John Adams wrote a technical proposal to use the 'invisible' part of the TV-signal (VBI) to transmit closed captions for the hearing impaired.
BBC and IBA developed their own systems, agreed on a common standard, and launched Ceefax (1974) and ORACLE (1978) respectively.
The third standard was the videotex-standard Prestel from the British Post Office.
In 1971, Philip’s engineer John Adams wrote a technical proposal to use the “invisible” part of the TV-signal (VBI) to transmit closed captions for the hearing impaired.* This was the starting point of three government bodies in the UK developing their ow
