Television motion detection arrangement

Details Television motion detection arrangement Television motion detection arrangement

1989-05-23

1990-12-18

Peng, John K.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 21R, 358160, H04N 718, H04N 964, H04N 514

Patent

active

049790366

ABSTRACT:
A television picture memory (MEM) containing digital picture signal values associated with picture elements (PIX) is coupled via a picture signal value comparison circuit (COM1) and an absolute value circuit (ABS1) to an adaptive threshold circuit (THR) for the picture signal differences. In order to obtain a motion detection with a directional sensitivity in the horizontal and vertical direction, the threshold circuit (THR) has an adaptive horizontal and vertical threshold value - adapting circuit (ADA) which produces the adaptive threshold values (HI and VI) via maximum value passing circuits (H MAX and V MAX) which are coupled to the memory (MEM) via an absolute value circuit (ABS2), a picture signal comparison circuit (COM2) and a signal combining circuit (AVE2), and by-passing it. The comparison circuit (COM2) is operative for the horizontal threshold value (HI) with picture elements in the line direction which are more or less adjacent to an instantaneous picture element and picture element values which are derived via the signal combining circuit (AVE2) from the picture elements of one of the more or less adjacent, superjacent or underlying lines belonging to the instantaneous, preceding or subsequent field period. The comparison circuit (COM2) is operative for the vertical threshold value (VI) with picture elements in the field direction that are more or less adjacent to the instantaneous picture element and picture element values which are derived via the combining circuit (AVE2) from the picture elements of one of the more of less adjacent, superjacent or underlying lines belonging to the instantaneous, preceding or subsequent field period.

REFERENCES:
patent: 4625239 (1986-11-01), Vroeswijk et al.
patent: 4639773 (1987-01-01), Hurst
patent: 4641180 (1987-02-01), Richter
patent: 4703358 (1987-10-01), Flannaghan
patent: 4733297 (1988-03-01), Katsumata et al.
patent: 4740842 (1988-04-01), Annegarn et al.
patent: 4845560 (1987-07-01), Kondo

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