1. A method for detecting field motion in an interlaced video signal having a first field and a second field of different parity, the method comprising: selecting a plurality of pixels of a plurality of adjacent field lines of alternating parity of the video signal, each pixel of the plurality of pixels corresponding to a different field line of the plurality of adjacent field lines of alternating parity, the plurality of pixels including a first subset having at least a first pixel from the first field, and a second subset having at least a second pixel from the second field; generating a plurality of differential values using the plurality of pixels, each differential value of the plurality of differential values being a difference based on a value of at least one pixel in the first subset and a value of at least one pixel in the second subset; determining that each differential value of the plurality of differential values is of a same sign; comparing at least one differential value of the plurality of differential values with a threshold value; and generating, responsive to the comparing, a motion coefficient indicative of a magnitude of motion associated with one of the plurality of pixels.