Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1989-05-31
1991-06-25
Groody, James J.
Facsimile and static presentation processing
Static presentation processing
Attribute control
358167, H04N 964
Patent
active
050271946
ABSTRACT:
A method and an apparatus for the simultaneous reduction of noise and cross-color interference in television signals includes a picture processor having a recursive filter for processing a luminance signal and two chrominance signals. The picture processor also has a change detector connected to the recursive filter for determining filter coefficients for both chrominance signals from the luminance signal and feeding the filter coefficients as input signals to the recursive filter. The change detector for the luminance signal has comparison devices with variable thresholds and two evaluation circuits triggered by the comparison devices for defining the filter coefficients for the luminance signal and the chrominance signals.
REFERENCES:
patent: 4240106 (1980-12-01), Michael et al.
patent: 4658285 (1987-04-01), Lewis, Jr.
German Publication F&KT Book 37, No. 5/1983; "Moglichkeiten der Qualitatsverbesserung beim neutigen Fernsensystem", H. Schonfelder; pp. 187-196.
IEEE Trans. CE-29, 1983, No. 3, Aug., "Application of Picture Memories in Television Receivers", Berkhoff et al; pp. 251-258.
Greenberg Laurence A.
Groody James J.
Lerner Herbert L.
Siemens Aktiengesellschaft
Vu Kim Yen
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