Television – Image signal processing circuitry specific to television – Noise or undesired signal reduction
Patent
1993-04-14
1994-06-28
Groody, James J.
Television
Image signal processing circuitry specific to television
Noise or undesired signal reduction
348624, 348625, H04N 521
Patent
active
053252039
ABSTRACT:
An adaptively controlled noise reduction device in which an input video signal is supplied to first, second, and third adders and in which an output of the first adder is supplied to the second adder via a memory responsive to a controller whereby the memory provides a controllable delay. An output of the second adder is supplied via a first coefficient multiplication unit having variable attenuation that is controlled by the controller to the first adder as well as via a second coefficient multiplication unit having variable attenuation that is controlled by the controller to the third adder. A change-over switch responsive to the controller outputs either a signal from the third adder or from the memory. Therefore, a signal is output even during the delay period produced by the memory when the signal is delayed between the first and second adders.
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Nojima Satoshi
Senuma Toshitaka
Eslinger Lewis H.
Grant Chris
Groody James J.
Maioli Jay H.
Sony Corporation
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