Patent ID: 8659705
Filing Date: 2014-02-25
Classification: H04N

Abstract:
1. A noise reducer, comprising: a first subtractor configured to generate a difference N an amplitude adjuster configured to adjust an amplitude of an output signal of the first subtractor based on a motion signal MV; a second subtractor configured to subtract an output N a frame memory configured to generate the delayed video signal Ypre obtained by delaying the output video signal Yout of the second subtractor by a time corresponding to one screen; and a motion detector configured to calculate an amount of change in the input video signal Ynow with respect to the delayed video signal Ypre for each of pixels constituting one screen, and generate the motion signal MV for each of pixels such that the motion signal MV determines, as “moving,” each of pixels of a predetermined proportion of all the pixels for each of which the amount of change is smaller than a predetermined threshold value.