A GENERAL DESCRIPTION OF TELIDON - A CANADIAN PROPOSAL FOR VIDEOTEX SYSTEMS

Authors
  1. Bown, H.G.
  2. O'Brien, C.D.
  3. Sawchuk, W.
  4. Storey, J.R.
Corporate Authors
Communications Research Centre, Ottawa ONT (CAN)
Abstract
Videotex systems allow easy 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. Each page of information may contain both textual and graphic images. A new terminal-independent method of describing images is suggested in this report on the Canadian Telidon Videotex system. Images are described as either alpha-geometric or alpha-photographic images by means of Picture Description Instructions (PDI's). This new approach permits the growth of large information bases, through terminal independence, which would not have to change to accommodate new developments and improvements as new technologies become available in the foreseeable future.
Report Number
TN-697-E —
Date of publication
15 Dec 1978
Number of Pages
28
DSTKIM No
79-00606
CANDIS No
84964
Format(s):
Hardcopy;Originator's fiche received by DSIS

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