Patent ID: 6148049
Filing Date: 2000-11-14
Classification: H04N

Abstract:
An improved method for synchronization of a first clock signal generated in a data receiving station with a second clock signal used in a data transmitting station, the improvement which comprises:transmitting timemark data representing a count dependent on a frequency of the second clock signal from the data transmitting station to the data receiving station;evaluating a value and a time of reception of the timemark data in the data receiving station;forming in the data receiving station estimated values based on both current timemark data and previously received timemark data and the estimated values representing a parameter characterizing the frequency of the second clock signal of the data transmitting station by minimizing a sum of the squares of values, the values characterizing differences between the timemark data of the data transmitting station and relationships calculated using the estimated values; andtriggering a clock signal generator to produce the first clock signal to be synchronized to the second clock signal on a basis of the estimated values.