Digital Teletext
Digital television introduced "digital teletext" which, despite the previous teletext standard's digital nature, has entirely different standards, such as MHEG-5 and Multimedia Home Platform. However, standard teletext remains very popular. Some digital television platforms such as Sky Digital in the UK and Ireland, and the Saorview DTT platform in Ireland incorporate separate teletext streams (used by the BBC from 1998 to 2004, and still used by Irish broadcasters RTÉ, TV3 and TG4), which are provided to the television set in the normal analogue TV manner. Such emulation of analogue teletext on digital TV platforms may ensure its continued use for some time (There are plans for an immediate transition to digital terrestrial transmission in some countries, such as Ireland on 24 October 2012). This emulation is only possible due to the DVB-TXT and DVB-VBI sub-standards of DVB, which allow a set-top box or integrated DVB TV to reproduce the vertical blanking interval data in which Teletext is carried.
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