Pulse or digital communications – Bandwidth reduction or expansion – Television or motion video signal
Patent
1999-05-13
2000-09-19
Britton, Howard
Pulse or digital communications
Bandwidth reduction or expansion
Television or motion video signal
348154, 348473, 348699, 358908, H04N 514, H04N 964
Patent
active
061223220
ABSTRACT:
The present invention relates to a method and to a system for detecting a first context change between two frames. When a second context change between a further two frames occurs within a predetermined time interval, the frames accommodated within the two context changes are defined as a subliminal message. An alarm is sent to an observer upon detection of a subliminal message.
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Britton Howard
Diep Nhon T
Telefonaktiebolaget LM Ericsson
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