:For the method of incrementally displaying raster graphics, see Interlace (bitmaps). » For the decorative motif used in ancient European and Celtic art, see Migration Period art and Celtic knot. Interlace's a technique of improving the picture quality of a video signal without consuming extra bandwidth. Interlaced video was designed for display on CRT televisions. The concept of breaking a single video frame into interlaced 'fields' was first demonstrated by Russian inventor Léon Theremin… (More on Interlace)