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teletext

An information service of 200-700 “pages” covering a wide range of topics including TV Schedules, News, Financial Market prices, Comment, Reviews, Concert and Theater information. Subtitles are typically transmitted on page 888 in the UK, on pages 199/299/399 in Belgium and Holland, on page 150 in Germany, and on page 777 in Italy. There are a number of variant character sets used, but the encoding is identical and all English alphabet characters plus numbers and most punctuation can be handled by any decoder. Includes support for eight colors, and limited block graphics, and selective revealing of underlying TV picture.

Transmitted on a variable number of lines (specified in header which contains basic information such as time, date, and channel), starting on line 12 and continuing for 7-8 lines typically. Found on broadcasts and some Laserdiscs; recording of TeleText signals is marginal on S-VHS, almost impossible on VHS, hence, the PAL/625 version of CC.

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