Method for horizontal and vertical contour correction of a digit

Details Method for horizontal and vertical contour correction of a digit Method for horizontal and vertical contour correction of a digit

1980-09-09

1982-11-23

Martin, John C.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358166, 358 37, H04N 514, H04N 9535

Patent

active

043608302

ABSTRACT:
A method and apparatus is proposed for the H and V-contour correction of a digitized video signal wherein after deriving a digital correction signal, both the main video signal and the correction signal are D/A converted. The H and V-detail signals are then derived from the analogue correction signal, are combined with a contour correction signal and are added in a suitable manner to the main video signal.

REFERENCES:
patent: 3729580 (1973-04-01), Schneider
patent: 3804980 (1974-04-01), Lowry
Schonfelder, "Farbtragerfalle", Farbfernsehen.sup.2, pp. 153-155, published 1966.
Nezer, "Active Notch Filters", Wireless World, Jul. 1975, pp. 307-311.
Vrijer, "Advanced Techniques for Plumbicon Cameras", Journal of the SMPTE, Nov. 1966, vol. 75, pp. 1080-1082.

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