Cable television video messaging system and headend facility incorporating same
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 27, 1996
Grant Date -
N/A
app pub date -
Sep 13, 1993
filing date -
Sep 13, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A 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.
First Claim
Family
International Classification(s)
Cited Art Landscape
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