teletext
Sign in to savethumb|A British Teletext Ltd. index page from September 2001, showing news about the [[September 11 attacks|255x255px]]
Article
19 sectionsContents
- History
- Rollout in the United Kingdom
- Development in other countries
- Decline
- Technology
- Data transmission
- Levels
- Decoders
- Uses
- Interactive teletext
- Bulletin boards
- Teletext art
- Legacy and successors
- Internet services
- Digital teletext
- Similar systems
- See also
- References
- External links
thumb|A British Teletext Ltd. index page from September 2001, showing news about the [[September 11 attacks|255x255px]]
Teletext, or broadcast teletext, is a standard for displaying text and rudimentary graphics on suitably equipped television sets. Teletext sends data in the broadcast signal, hidden in the invisible vertical blanking interval (VBI) area at the top and bottom of the screen. The teletext decoder in the television buffers this information as a series of "pages", each given a number. The user can display chosen pages using their remote control. Teletext was uni-directional- the user could only receive, and not respond or send data of their own.