US PATENT 5,270,800 --SUBLIMINAL MESSAGE GENERATOR--A
combined subliminal and supraliminal message generator for use with a television
receiver permits complete control of subliminal messages and their manner
of presentation. A video synchronization detector enables a video display
generator to generate a video message signal corresponding to a received
alphanumeric text message in synchronism with a received television signal.
A video mixer selects either the received video signal or the video message
signal for output. The messages produced by the video message generator
are user selectable via a keyboard input. A message memory stores a plurality
of alphanumeric text messages specified by user commands for use as subliminal
messages.
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