Inventors:
Robert Thibadeau - Pittsburgh PA
Joseph M. Newcomer - Pittsburgh PA
David Touretzky - Pittsburgh PA
Assignee:
Television Computer, Inc. - Pittsburgh PA
International Classification:
H04N 716
Abstract:
Location specific messages or programming are generally broadcast and selectively filtered by user terminals which have encoded one or more arbitrary locations of interest. The area surrounding a user, a remote location, a route to be travelled or the like may be selected for receipt of local warnings, local commercial messages and the like. Transmitted messages contain information targeted to geographical groups of users, with location designation coding accompanying location-specific messages. A geographic location selection code is entered into a data processor coupled to the user's receiver to define the user's selected location(s) of interest. The processor receives the information segment and its designation code and compares the designated location to the selected one. Segments where the designated and selected points or areas overlap are processed, e. g. , being displayed, stored or used to trigger a warning.