05014125 is referenced by 659 patents and cites 9 patents.

An interactive television system employs a telephone connection in a two-way manner to send command signals from a viewer to a central controller to select various presentations and to send the audio portion of such presentations from a central location to individual viewers. When a connection is first established over the telephone lines between a viewer and the central controller, a transmission path identification is sent from the viewer's terminal to the central controller which indicates the particular video transmission path, e.g. trunk line and/or television channel, connecting the viewer to the central location. This path is then used to control the transmission of uniquely addressed viewo presentations from the central location to the viewer's terminal, where they are stored and retransmitted to the viewer's receiver.

Title
Television system for the interactive distribution of selectable video presentations
Application Number
7/347732
Publication Number
5014125
Application Date
May 5, 1989
Publication Date
May 7, 1991
Inventor
Allan Lodberg
London
CA
Peter Coumons
London
CA
Rick McNorgan
London
CA
Terrence H Pocock
Delaware
CA
Agent
Burns Doane Swecker & Mathis
Assignee
Cableshare
CA
IPC
H04N 7/10
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