Progressive scanning (alternatively referred to as
noninterlaced scanning) is a way of displaying, storing, or transmitting
moving images in which all the lines of each
frame are drawn in sequence. This is in contrast to
interlaced video used in traditional
analog television systems where only the odd lines, then the even lines of each frame (each image called a
video field) are drawn alternately, so that only half the number of actual image frames are used to produce video.