A method for setting of sampling - points in time in a sampling clock in a picture signal - a scanning system or circuit for carrying out such a method

摘要

The present invention relates to a method for adjusting of sampling - points in time (ta) of a sampling clock (a) in a picture signal - a scanning system, in which- an analog picture signal (s) by means of the sampling clock and provided with a sampling - frequency (fa = fc) for providing digital image data (d) is scanned, wherein- the sampling clock a result of the temporal displacement (dt) of a basic clock (c) for sampling is provided and- a required displacement (dt) is determined from the image data (d), wherein- a sequence of amplitudes - differences between in each case at least two amplitude values of the image data (d) is determined,- a minimum - - sampling time, as a point in time of the smallest amplitudes - difference from the sequence of the amplitudes - differences is determined and- to be used for scanning sampling - points in time (ta) be determined from the minimum - - sampling point in time with respect to a shift amount (1 / 2 · c) is not equal to zero.