H - Electricity – 04 – N
Patent
H - Electricity
04
N
350/24
H04N 7/173 (2006.01) G09B 5/06 (2006.01) G09B 7/04 (2006.01) H04N 7/16 (2006.01) H04H 9/00 (2006.01)
Patent
CA 1333499
The present invention is directed to interactive television systems for providing seamless interactive television programming with unlimited expandability of usership. The system provides a multichannel television signal from a localized head end which is used for individualized interactive selections by a plurality of users. Each user station contains a conventional television receiver and a smart box or interface and selection device. The smart box or interface and selection device is disposed between the television receiver and the RF distribution amplifier. The number of user stations on the system is virtually unlimited. The system provides the audio/video television signals in at least frame accurate synchronization to enable seamless video switching between channels, which seamlessness is enhanced through the view of a pair of tuners in the interface selection box which are alternately commanded to pretune to the channel of the next actual choice made prior to the changeover under control of a microprocessor in response to command signals embedded in the television signals being received.
616676
Actv Inc.
Kirby Eades Gale Baker
LandOfFree
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