Television – Image signal processing circuitry specific to television – Noise or undesired signal reduction
Patent
1993-04-26
1995-03-28
Kostak, Victor R.
Television
Image signal processing circuitry specific to television
Noise or undesired signal reduction
348622, H04N 521
Patent
active
054021790
ABSTRACT:
A detector including filters adapted so that a signal is inputted thereto to judge whether or not a noise signal is included, or to what extent such noise signal is included; and an operation unit for synthetically judging, on the basis of results that these filters have judged, whether or not a noise signal is included, or to what extent such noise signal is included, thus to automatically detect the quantity of noises included in the signal.
A noise reduction device operative to control the noise reduction operation on the basis of an output of this detector to suppress adverse effects resulting from the fact that noise reduction is implemented to a signal having a high SN ratio.
REFERENCES:
patent: 4050084 (1977-09-01), Rossi
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patent: 4561022 (1985-12-01), Bayer
patent: 4768094 (1988-08-01), Ichinoi
patent: 4825289 (1989-04-01), Ohta
patent: 4833537 (1989-05-01), Takeuchi
patent: 5185664 (1993-02-01), Darby
patent: 5191419 (1993-03-01), Wischermann
patent: 5210798 (1993-05-01), Ekchion
Grant Chris
Kabushiki Kaisha Toshiba
Kostak Victor R.
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