Adaptive ringing reducer for television signal processing

Details Adaptive ringing reducer for television signal processing Adaptive ringing reducer for television signal processing

1989-07-24

1990-07-03

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358167, 358133, 358156, 36472401, 455313, H04N 514, H04N 5208, H04N 5213

Patent

active

049395769

ABSTRACT:
A method for reducing ringing artifacts caused by low pass filtering of baseband television signals comprises the steps of: detecting the occurrence of a horizontal transition in the baseband television signal as by measuring its magnitude and spectral slope, developing a control signal from the detected horizontal transition which is related in duration to the horizontal transition, applying the control signal smoothly and adaptively to modify the structure of a low pass filter structure during the duration of the control signal to minimize ringing response of the structure.

REFERENCES:
patent: 3736511 (1973-05-01), Gibson
patent: 4417269 (1983-11-01), Dischert
patent: 4631737 (1986-12-01), Davis et al.
patent: 4672444 (1987-06-01), Bergen et al.

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