teletext

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teletext A system for one-way broadcast transmission of information, primarily in text form but with primitive graphics capability, using spare television channel capacity and adapted domestic TV receivers. On a channel offering teletext, a number of “pages” of information (up to about 100) are transmitted in a continuous cycle, concurrently with the normal TV signal and leaving it unaffected while the receiver is used for normal viewing. Having selected teletext mode on the control pad, it is then possible to select any page number; when the selected page next arrives in the transmission cycle, it is stored in local memory in the set and displayed indefinitely (until the user selects another page or exits from teletext mode). Compare videotex.

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