Tail extrapolator and method

摘要

This invention discloses a method which comprises quantizing an input signal. The number of equal quantized values during a period of time is counted thereby obtaining said number of counts (22). The counts exceeding a count threshold (21) being defined as reliable counts, the counts lower than or equal to the count threshold being defined as unreliable counts. Two unreliable counts are calculated using a lower and a higher value for a first parameter in an extrapolating function. The first parameter is considered equivalent to the lower value if the two unreliable counts differ less than or equal to a count difference (µ). The invention further discloses a corresponding tail extrapolator.