Apparatus for accentuating amplitude transistions

Details Apparatus for accentuating amplitude transistions Apparatus for accentuating amplitude transistions

1975-05-23

1976-09-28

Griffin, Robert L.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 37, 178 73R, 178DIG34, H04N 9535

Patent

active

039835766

ABSTRACT:
A transversal equalizer is included in the luminance channel of a television receiver. Delayed video signals developed at taps of the transversal equalizer are combined to provide an output signal including preshoots and overshoots to accentuate amplitude transitions in the video signal so that, for example, a tonal transition from black to white is blacker than it normally would be just prior to the transition, and whiter than it normally would be just after the transition. The transversal equalizer includes provisions for selectively combining portions of predetermined delayed signals dependent upon the direction of the amplitude transitions such that preshoots and overshoots in one direction, e.g., the white direction, are relatively compressed or otherwise suppressed with respect to preshoots and overshoots in the other, i.e., black, direction.

REFERENCES:
patent: 3752916 (1973-08-01), Lowry et al.
patent: 3778543 (1973-12-01), Lowry
patent: 3780215 (1973-12-01), Shibata et al.
patent: 3858240 (1974-12-01), Golding et al.

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