1. A method of storing stillness information for a video stream having a plurality of fields each having a plurality of pixels, the method comprising: generating a field stillness characteristic for a current pixel of a current field; and accumulating the field stillness characteristic of the current pixel of the current field with an accumulated stillness characteristic corresponding to a pixel location of the current pixel, wherein the accumulated stillness characteristic includes stillness information regarding at least one previous pixel of a previous field in the same pixel location as the current pixel in the current field.