videotex


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Related to videotex: videotext

videotex,

communications service that is linked to an adapted televisiontelevision,
transmission and reception of still or moving images by means of electrical signals, originally primarily by means of electromagnetic radiation using the techniques of radio, now also by fiber-optic and coaxial cables and other means.
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 receiver or a personal computerpersonal computer
(PC), small but powerful computer primarily used in an office or home without the need to be connected to a larger computer. PCs evolved after the development of the microprocessor made possible the hobby-computer movement of the late 1970s, when some computers
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 by telephone lines, cable televisioncable television,
the transmission of televised images to viewers by means of coaxial cables. Cable systems receive the television signal, which is sent out over cables to individual subscribers, by a common antenna (CATV) or satellite dish.
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 facilities, or the like, and that allows a user to retrieve and display alphanumericalphanumeric
or alphameric
, the set of letters and numbers. When used in reference to computer input and output, the set usually is expanded to include the upper- and lower-case alphabetic characters (A–Z, a–z), the numeric characters (0–9), and
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 and pictorial information at home. Originally, videotex systems were limited to menu-oriented applications, in which information is selected from hierarchically arranged menus and displayed in fixed frames, but later technologies allowed greater interactivity and scrolled the information across the viewing screen. There are two forms of videotex systems. One-way teletext systems permit the selection and display of such general information as airline schedules, traffic conditions, and traditional newspaper content. Viewdata systems are more specific and provide for two-way, or interactive, communication. Specific questions may be researched by accessing the appropriate database: e.g., bank balances can be verified and bills paid, merchandise can be ordered from retail merchants and catalogs, and travel and hotel reservations can be made.

In Japan and Europe, videotex systems became well-established and were government-operated; in North America, systems were developed by newspaper publishers (called electronic news) and banks. With the growing popularity of the personal computer, on-line database services became more significant, especially in the United States. These made the home user part of an interactive networknetwork,
in computing, two or more computers connected for the purpose of routing, managing, and storing rapidly changing data. A local area network (LAN), which is restricted by distances of up to one mile, and a metropolitan area network (MAN), which is restricted to distances
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 and provide electronic mailelectronic mail
or e-mail,
the electronic transmission of messages, letters, and documents. In its broadest sense electronic mail includes point-to-point services such as telegraph and facsimile (fax) systems.
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 and bulletin board facilities in addition to traditional videotex services. Videotex was ultimately superseded by the development of graphical web browsers and of the World Wide Web, though some services continue to be offered; InternetInternet, the,
international computer network linking together thousands of individual networks at military and government agencies, educational institutions, nonprofit organizations, industrial and financial corporations of all sizes, and commercial enterprises (called gateways
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 access gave the user the means to interact with services and facilities worldwide.

Bibliography

See A. F. Alber, Videotex/Teletext: Principles and Practices (1985); P. L. Mothersole and N. W. White, Broadcast Data Systems (1990); A. F. Alber, Interactive Computer Systems: Videotex and Multimedia (1993).

videotex

[′vid·ē·ō‚teks]
(communications)
An electronic home information delivery system, either teletext or videotext.

Videotex

™ an information system that displays information from a distant computer on a television screen

videotex

An obsolete electronic service offering people the privilege of paying to read the weather on their television screens instead of having somebody read it to them for free while they brush their teeth. The idea bombed everywhere it wasn't government-subsidised, because by the time videotex was practical the installed base of personal computers could hook up to time-sharing services and do the things for which videotex might have been worthwhile better and cheaper. Videotex planners badly overestimated both the appeal of getting information from a computer and the cost of local intelligence at the user's end. Like the gorilla arm effect, this has been a cautionary tale to hackers ever since. See also vannevar.

videotex

The first attempts at interactive information delivery for shopping, banking, news, etc. Many trials were made, but it never caught on in the U.S. and was not very successful anywhere except in France (see Minitel). Videotex uses a TV set-top box and keyboard. Data are delivered by phone line and stored in the box as predefined frames with limited graphics that are retrieved by menu.
References in periodicals archive ?
El videotex es la denominacion generica de todo sistema de informacion textual electronica.
Content for the Heldref and Worldwide Videotex publications is provided and hosted by Bell & Howell Information and Learning's ProQuest Archiver(tm), a business partner that ensures a high-quality user experience.
Very few mention e-mail or other forms of electronic messaging, which already were being offered by videotex systems.
To test propositions about national networks, we compared firms in France, where the Teletel videotex system provided a rudimentary national data network, with firms in the U.
To satisfy public officials' urgent need for high-quality analysis of imaging's benefits to and impact on the public-sector workplace, PTI is producing a local government imaging guidebook similar to those it has published in the past on videotex and GIS applications.
Videoway also offers a number of videotex services such as airline reservations and banking as well as news and other information.
He taps into the videotex service run by the county.
Videotex is slightly different than computer-based networks.
Their chief purpose in The Electronic Commonwealth is to assess the challenges that new technologies (computers, satellites, videotex, television delivery systems, etc.
Data services include circuit switched asynchronous from 300 to 9600 bps, with the public switched telephone network and the integrated services digital network interworking; circuit switched synchronous from 1200 to 9600 bps, with the public switched telephone network, the integrated services digital network and the circuit switched public data network interworking; asynchronous packet assembler/disassembler access from 300 to 9600 bps, with the packet switched public data network interworking; and teletex and videotex services accessed over a bearer network.
Some PTTs introduced new networks and services, like the packet-switched data network (TRANSPAC) and the public videotex services (Teletel/Minitel) in France.