Controllable non-linear processing of video signals

Details Controllable non-linear processing of video signals Controllable non-linear processing of video signals

1979-05-11

1981-01-13

Martin, John C.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 36, 358 37, H04N 9535

Patent

active

042452376

ABSTRACT:
A gain controllable circuit suitable for processing vertical detail signal information in a video signal is disclosed. The circuit exhibits a non-linear signal amplitude transfer function wherein different amounts of signal gain are imparted to signals having amplitudes within prescribed ranges. Small amplitude signals subject to restoration are translated with a prescribed restoration gain. Moderate amplitude signals subject to enhancement (peaking), and large amplitude signals subject to paring (amplitude reduction), are controllably amplified without altering the restoration gain characteristic for small signals.

REFERENCES:
patent: 3715477 (1973-02-01), Olson et al.
patent: 4074321 (1978-02-01), Miller
patent: 4096516 (1978-01-01), Pritchard
McMann et al., "Improved Signal Processing Techniques For Color Television Broadcasting," Journal of SMPTE, Mar. 1968, vol. 77, pp. 221-228.

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