Originally I investigated using an unmodified videodisc player and storing data as full-frame teletext. The BBC's Telesoftware Project was regularly transmitting software using teletext on the BBC's Ceefax teletext service. (Teletext, for those non-Europeans in the readership, is a data signal transmitted in the vertical blanking of a TV signal and used to produce small pages of text and basic graphics. The BBC's Ceefax service started in 1972 and currently attracts around 15 million users a week. Pretty-well all UK analogue TV channels broadcast a teletext service of one kind or another ... and so do most European ones.) There was a teletext adapter for the BBC Micro and I had produced a demonstration application using a BBC videodisc called "British Garden Birds" which included a teletext magazine. This application pulled digital data from the videodisc using the teletext adapter. Unfortunately it was a little temperamental although I did successfully demonstrate it to the BBC Board of Governors in 1984.
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