Patent ID: 7760271
Filing Date: 2010-07-20
Classification: H04N

Abstract:
1. Method for determining a noise component in a video signal wherein the method comprises the following steps: a) delaying the video signal; b) forming the difference between the video signal and the delayed video signal, and determining the absolute value of the difference; c) determining the amplitudes of the delayed and the undelayed video signal; d) depending on the amplitudes determined in the preceding step, the absolute value of the difference between the delayed and the undelayed video signal is provided to one or two of an at least two different processing channels; e) calculating, in each processing channel, within a number of search windows, a maximum of the absolute values of the difference between the video signals for the respective search window, wherein a search window is rejected for the purpose of noise signal determination if the amplitude of the video signal that was used for determining an absolute difference value within this search window lies outside the permitted amplitude range of the respective processing channel; f) determining a minimum from the maxima in each processing channel, which minimum corresponds to the respective peak value of the noise component of the signal.