System for reduction of noise in a television signal

Details System for reduction of noise in a television signal System for reduction of noise in a television signal

1984-05-18

1985-10-22

Martin, John C.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358166, 358 36, H04N 521, H04N 514

Patent

active

045492131

ABSTRACT:
An improved movement detector (8) for a television noise reduction system interposes a recursive filter (12) between the absolute value circuit (9) which signalizes the magnitude difference between delayed and undelayed television signals and the function generator (11) which forms the correction factor k which controls the degree of noise reduction. Especially for filtering changes in the vertical direction and the recursive filter involves a considerable saving in equipment.

REFERENCES:
patent: 4090221 (1978-05-01), Connor
patent: 4485403 (1984-11-01), Illetschko

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