05543856 is referenced by 155 patents and cites 9 patents.

A system and method are disclosed for authorizing, controlling, and monitoring the insertion of advertising indicia and other video images into a broadcast video stream by an Electronic Billboard system operated at a location remote from a video program origination location. The disclosed control means will be implemented in the form of a user key which is presupplied to an operator of the remote Electronic Billboard system, a broadcast key supplied to that operator at or near the time of transmission of the broadcast video stream, and a verification means operated in conjunction with the remote Electronic Billboard system to verify that those keys correspond to a predetermined criteria. Upon such verification, the remote Electronic Billboard system is enabled to operate on the broadcast video stream. The control means may also be applied for maintaining the integrity of either or both the products being advertised and the event being broadcast.

Title
System and method for downstream application and control electronic billboard system
Application Number
143938
Publication Number
5543856
Application Date
August 24, 1995
Publication Date
August 6, 1996
Inventor
Brown F Williams
Princeton
NJ, US
Roy J Rosser
Princeton
NJ, US
Agent
Richard C Woodbridge
Assignee
Princeton Video Image
NJ, US
IPC
H04N 5/262
View Original Source