Television – Format – Including additional information
Patent
1992-11-10
1994-07-05
Groody, James J.
Television
Format
Including additional information
375 22, H04N 7093, H04N 718, H04N 710
Patent
active
053272382
ABSTRACT:
A closed circuit television communication system for the transmission and reception of original video signals over wires is provided in which separated horizontal sync pulses of the original video signal are pulse width modulated by an audio signal, enabling the video signal to carry additional information which can be recovered on reception. The horizontal sync pulses are separated from the original video signal which are pulse width modulated to form a pulse which varies linearly with an audio input signal. The horizontal sync pulses are replaced in the original video signal with the pulse width modulated pulses while preserving the original video signal levels surrounding the replaced video area. The reconstituted video signal is transmitted over wire, received and the pulse width modulated pulses from the reconstituted video signal are separated and demodulated to produce an audio output signal along with the original video signal.
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Groody James J.
Metjahic Safet
LandOfFree
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