Patent ID: 8355443

Claim:
A motion detector for detecting motion in an interlaced video signal, the motion detector comprising: a frame motion detector receiving a first field of the interlaced video signal and a second field of the interlaced video signal, the first field being different from the second field and having a same parity as the second field, the frame motion detector being configured to: determine a first motion value based on the first field and the second field by using a first window having a first size, determine a second motion value based on the first field and the second field by using a second window having a second size, the second size being different from the first size, and selectively blend the first motion value and the second motion value to generate a frame motion value corresponding to a missing pixel of a current field of the interlaced video signal; a field motion detector receiving the current field and a third field of the interlaced video signal, the third field having an opposite parity to the current field, the field motion detector being configured to generate a field motion value corresponding to the missing pixel based on the current field and the third field; and a recursive motion detector configured to receive the frame motion value and the field motion value and to generate a motion value corresponding to the missing pixel, to compare the frame motion value to the field motion value, to output the frame motion value as the motion value corresponding to the missing pixel in response to determining that the frame motion value is greater than or equal to the field motion value, and to increment an accumulator by an amount based on the field motion value divided by a programmable number of steps in response to determining that the field motion value is greater than the frame motion value.