Noise reducer using magnitude of noise and non-linear signal...

Details Noise reducer using magnitude of noise and non-linear signal... Noise reducer using magnitude of noise and non-linear signal...

H - Electricity

04

N

350/81

H04N 5/213 (2006.01) H04N 5/21 (2006.01)

Patent

CA 1271255

ABSTRACT OF THE DISCLOSURE A level difference detecting circuit 9 and an integrating circuit 10 receive a digital image signal inputted from an image signal input terminal 1 and detect a magnitude during a constant level period in every field. A determining circuit 12 determines the magnitude of the detected noise and selects the kind of a non-linear parameters to be used in a digital filter 8. Therefore, the digital filter 8 always performs processing for reducing noise by the most suitable non-linear parameter in accordance with the magnitude of noise.

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