1. A method of de-interlacing a video field in which new pixels to be added to the said field are derived from temporally adjacent fields comprising the steps of forming a first new-pixel value from motion compensation of a pixel of an earlier field with a first motion vector; forming a second new-pixel value from motion compensation of a pixel of a later field with a second motion vector; combining the said first and second new-pixel values in dependence upon a comparison of respective confidence values associated with the said first and second motion vectors so as to obtain a value for a new pixel to be added to the said field to be de-interlaced.