Abstract: A detector for a video signal includes a pixel comparator that compares a plurality of values of pixels of a first field of the video signal with corresponding pixels of a second field of the video signal. The second field is a second preceding field of the video signal in relation to the first field. The resultant values from the comparison is a set of pixel difference values. A counter determines a count value representative of the number of the set of pixel difference values that are either greater than a threshold value or less than the threshold value. A thresholder circuit determines a variable statistical value, such as an average, based upon a preceding series of the count values. The thresholder circuit compares the variable statistical value with the count value, or a percentage thereof, to determine whether the variable statistical value is greater than the count value or whether the statistical value is less than the count value.