In interlaced video, the horizontal scan lines of each complete frame are treated as if numbered consecutively, and captured as two "fields": an "odd field" (upper field) consisting of the odd-numbered lines and an "even field" (lower field) consisting of the even-numbered lines. Analog display devices reproduce each frame, effectively doubling the frame rate as far as perceptible overall flicker is concerned. When the image capture device acquires the fields one at a time, rather than dividing up a complete frame after it is captured, the frame rate for motion is effectively doubled as well, resulting in smoother, more lifelike reproduction of rapidly moving parts of the image when viewed on an interlaced CRT display.