ERIC Number: ED192816
Record Type: RIE
Publication Date: 1978-Dec
Reference Count: 0
A General Description of Telidon: A Canadian Proposal for Videotex Systems. CRC Technical Note No. 697-E.
Bown, H. G.; And Others
This report describes the videotex system, which allows access by the general public to large computer-based information sources, which contain pages of information to be displayed on suitably supplemented television receivers or newly designed videotex terminals. Some problems in introducing a videotex system suitable for today's technology which also allows for future expansion are discussed, and one solution proposed by the Canadian Department of Communications is outlined. The overall system of Telidon, the Canadian approach to videotex systems design, is described, with illustrations of various options and their components. Picture Description Instructions (PDI's), the proposed method of storing and communicating visual images and textual information, are explained, and approaches to the design of terminals to operate from the PDI codes are presented. PDI interpretation and execution, character-oriented terminals, bit-map display terminals, and future developments are discussed. The conclusions summarize the strengths of the Telidon system, and a brief list of references is followed by appendices which include an introduction to PDI's and examples of videotex display pages. (CHC)
Publication Type: Reports - Descriptive
Education Level: N/A
Authoring Institution: Canadian Communications Research Information Centre, Ottawa (Ontario).
Identifiers: Canada; Telidon System; Videotex
Note: CRC Technical Note No. 697-F is in the French language. Fine print in figures A2 and A4 may not reproduce. For a related document, see IR 008 910.