05999970 is referenced by 157 patents and cites 71 patents.

An access system and method for providing interactive access to an information source through a television distribution system is disclosed. The distribution system includes a television distribution network, headend distribution equipment at the headend of the distribution network, and a plurality of terminals at terminal ends of the distribution network. An input device and an upstream transmitter are associated with one of the terminals to input a command for the information source and to transmit the inputted command on an upstream channel of the distribution network, respectively. A headend server, upstream receiver, and blank interval inserter are associated with the headend distribution equipment. The headend server is interfaced to the information source. The upstream receiver is interfaced to the headend server to receive and forward the command to the headend server. The headend server transmits the forwarded command to the information source, and the information source transmits responsive information to the headend server. The blank interval inserter receives the information from the headend server and inserts sequential portions into blank intervals of sequential picture fields of a television transmission on a downstream channel of the distribution network. The blank interval extractor is interfaced to the terminal to extract the inserted sequential portions. The extracted information is then displayed on a display device associated with the terminal.

Title
Access system and method for providing interactive access to an information source through a television distribution system
Application Number
8/630397
Publication Number
5999970
Application Date
April 10, 1996
Publication Date
December 7, 1999
Inventor
Jae Hea Edward Lee
Roslyn
PA, US
Joseph E Augenbraun
Princeton
NJ, US
David E Wachob
Elkins Park
PA, US
Harold M Krisbergh
Rydal
PA, US
Agent
Akin Gump Strauss Hauer & Feld L
Assignee
World Gate Communications
PA, US
IPC
H04N 7/173
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