Cable television video messaging system and headend facility incorporating same
September 13, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3891792 Emergency civil defense alarm and communications systems Panelist response scanning system Television and market research data collection system and method Message delivery system operable in an override mode upon reception of a command signal Therapeutic subliminal imaging system Multi-channel message display system and method Communications system Apparatus for selective distribution of messages over a communications network Patent #: 5260778 InventorAssigneeApplicationNo. 120476 filed on 09/13/1993US Classes:725/33, Emergency warning725/144HeadendExaminersPrimary: Kostak, Victor R.Assistant: Grant, Chris Attorney, Agent or FirmInternational ClassH04N 007/16AbstractA cable television video messaging system for selectively overlaying or substituting a desired input message, for example an Emergency Broadcast System warning, onto multiple channels of a cable television system having a headend system where multiple external program signals are channelized by means of individual channel modulators. This achieved by a digital microprocessor powered message-management unit programmed to talk to a network of channel message units, one for each channel. Preferably the channel message units are also microprocessor powered and include character generator and channel synchronizer chips. General supervision of a cable television system's analog domain program distribution system by digital means is also possible.Other References
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