0893026-A1 cites 2 patents.

An interactive access system and method for accessing an information source through a television distribution system (11) is disclosed. The distribution system includes a television distribution network (12), headend distribution equipment (36), and a plurality of terminals. An input device and an upstream transmitter (64) are associated with one of the terminals to input an upstream command for the information source. The headend distribution equipment (36) associates with a headend server (38) which is interfaced to the information source, upstream receiver (64) which forwards the command to the headend server (38), and blank interval inserter (90) that receives the information from the headend server (38) and inserts sequential portions into blank intervals of a television transmission on a downstream channel.; The headend server (38) forwards command to the information source and receives responses from the source. The blank interval extractor (92) is interfaced to the terminal to extract the inserted sequential portions which is displayed on a display device.

Title
Access system and method for providing interactive access to an information source through a television distribution system
Application Number
EP19970921118 19970408
Publication Number
0893026 (A1)
Application Date
April 8, 1997
Publication Date
January 27, 1999
Inventor
Lee Jae Hea Edward
US
Augenbraun Joseph E
US
Wachob David E
US
Krisbergh Harold M
US
Assignee
World Gate Communications L L
US
IPC
H04N 07/173
H04N 07/16
H04N 07/14
H04N 07/173
H04N 07/10
H04N 07/087
H04L 29/06
H04N 07/173
H04N 07/10
H04N 07/088
H04L 29/06
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