Drop out compensating circuit with interpolation of proximate pi

Details Drop out compensating circuit with interpolation of proximate pi Drop out compensating circuit with interpolation of proximate pi

1992-01-30

1992-11-24

Kostak, Victor R.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358336, H04N 521

Patent

active

051667940

ABSTRACT:
In an interpolation signal producing circuit, amplitudes of a plurality of proximate pixel signals are compared and the order of magnitudes of such pixel signals is determined, whereupon an interpolation signal is derived which is intermediate the largest and smallest amplitudes, for example, next to the largest or smallest amplitudes or an average thereof. The interpolation signal thus derived may be advantageously employed for sub-sampling, that is, doubling the number of pixels in each horizontal scanning line of a displayed video picture, for doubling the horizontal scanning lines in a field, or in compensating for drop-out and the like.

REFERENCES:
patent: 4605966 (1986-08-01), Collins
patent: 4682230 (1987-07-01), Perlman et al.
patent: 4740742 (1988-04-01), Annegarn et al.
patent: 4839727 (1989-06-01), Tanaka et al.
patent: 4891699 (1990-01-01), Hamada et al.

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