Digital video signal compensation circuit

Details Digital video signal compensation circuit Digital video signal compensation circuit

1989-06-19

1991-02-05

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358166, H04N 5208

Patent

active

049910213

ABSTRACT:
In a digital video signal compensation circuit, a high frequency component of a digital video signal is obtained in a high-pass filter, and the high frequency component is compared in a comparator with a threshold signal, thereby determining whether the high frequency component is an edge component or a noise component. Where the high frequency component is the edge component, the high frequency component is added in an adder to the digital video signal, and where the high frequency component is a noise component, the high frequency component is subtracted in the adder from the digital video signal in accordance with the sign conversion of the high frequency component. Therefore, only one adder is provided in the digital video signal compensation circuit. That is, it is not necessary that an adder and a subtracter are provided therein.

REFERENCES:
patent: 4855829 (1989-08-01), Kihara
patent: 4918528 (1990-04-01), Oohashi

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