Clock synchronized digital TV motion detector

Details Clock synchronized digital TV motion detector Clock synchronized digital TV motion detector

1989-12-21

1991-04-16

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358108, 358 96, H04N 718

Patent

active

050087452

ABSTRACT:
A digital motion verification circuit for a television system. The circuit synchronizes an actual and a stored signal from an edge motion indicator with the system clock, so that the edge signals are precisely timed and do not have errors from overlapping or mistimed signals. The circuit uses an EXCLUSIVE OR circuit followed by an inverter stage to produce an output when the clock synchronized stored signal and the actual signal have a discrepancy. This EXCLUSIVE OR output signal is applied to the data input of a shift register that produces clock synchronized output signals which, when accumulated to a predetermined number, initiate a motion flag which indicates the presence of several exactly adjacent signals.

REFERENCES:
patent: 3969577 (1976-07-01), Lloyd
patent: 4160998 (1979-07-01), Kamin
patent: 4597010 (1986-06-01), Carr
patent: 4703358 (1987-10-01), Flannaghan
patent: 4731648 (1988-03-01), Bernard
patent: 4766490 (1988-08-01), Haghiri
patent: 4772945 (1988-09-01), Tagawa
patent: 4783833 (1988-11-01), Kawabata
patent: 4805018 (1989-02-01), Nishimura
patent: 4894716 (1990-01-01), Aschwanden

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