What is video line doubling?

• Line Doubler converts an interlaced video image to a non-interlaced (progressive scan) video image by creating the missing lines of video information from neighboring lines and fields. An ordinary video image (e.g. NTSC) consists of two fields of scanning lines, called interlaced video image, and a frame image is recreated by two fields of scanning lines. Therefore, flicker or horizontal stripes of scanning lines may appear and vertical resolution power of the image will be low. Line Doubler will reduce this distortion and enhance the vertical resolution of the image.