Patent ID: 7466364

Claim:
Device for reducing large area flicker in a video signal having a temporal median filter for compensating for brightness fluctuation in the video signal, a median filter connected downstream from said temporal median filter for suppressing motion artifacts in an output of said temporal median filter, a filter connected downstream from said median filter for passing high-frequency signal components with a low amplitude; and a first subtraction circuit for subtracting the high-frequency signal components with a low amplitude from a delayed video signal, wherein the median filter connected downstream contains a second subtraction circuit and wherein the filter connected downstream from said median filter comprises an amplitude filter, wherein the second subtraction circuit is provided for combining the inverted output signal of the temporal median filter and the delayed video signal and the amplitude filter is provided for suppressing the signal components with a low amplitude in the output signal of the second subtraction circuit, and wherein the first subtraction circuit which supplies the output signal from which flicker disturbances have largely been eliminated, is provided for combining the delayed video signal and the inverted output signal of the amplitude filter.