2251085 is referenced by 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
Systeme dacces et procede assurant un acces interactif a une source dinformations par lintermediaire dun systeme de distribution de television
Access system and method for providing interactive access to an information source through a television distribution system
Publication Number
2251085
Application Date
April 8, 1997
Publication Date
October 16, 1997
Inventor
Dill David A
Lee Jae Hea Edward
Augenbraun Joseph E
Wachob David E
Krisbergh Harold M
Agent
GOWLING LAFLEUR HENDERSON
Assignee
Sedna Patent Services
Assignee
World Gate Communications
IPC
H04N 07/16
H04N 07/10
H04N 07/088
H04N 07/08
H04L 29/08
H04L 29/06
H04L 12/12
H04N 07/173
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