Scan Converters, also called Down-Converters, transform higher resolution computer images into lower resolution video images. TV One's range of conversion products are based on CORIO technology and represent the latest in this field. All models are designed to convert computer signals of varying resolutions and vertical refresh rates into standard NTSC and PAL video signals. Normal television systems are much lower in resolution than typical computer signals. Computers can produce three or more times as many horizontal lines as standard analog television resolutions. Scan Conversion is the process of fitting a higher number of lines of information into a lesser number of available spaces.