Video signal processing

Details Video signal processing Video signal processing

1985-10-15

1987-10-06

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 11, 358 37, 358166, H04N 701

Patent

active

046986731

ABSTRACT:
High-definition video signal are produced using processing equipment incorporating a unit with two vertical-aperture circuits and and an interpolator, the former taking the signals A and C, passing them through a summation amplifier and a divide-by-two invertor. After combining this signal with B at the summation amplifier, the output signal .DELTA.B (which represents the vertical detail signal of B as compared to the signals A and C) is passed through a noise-coring circuit and any resulting output output added to B at the summation amplifier to produce a signal B* with enhanced vertical detail. Then signals B* and C* are averaged and alternately connected to the output of the unit, thereby to produce a high-definition video signal.

REFERENCES:
patent: 4426661 (1984-01-01), Okada et al.
patent: 4558347 (1985-12-01), Pritchard et al.
patent: 4577225 (1986-03-01), Pritchard

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