A compatible high-resolution TV system for cablecasting

Cablecasting offers the possibility of a new and improved system of color television. New technology for wide bandwidth, for large displays, and better signal transmission systems make it desirable to improve on the National Television System Committee (NTSC) system which has served so well for over-the-air transmissions. In this paper, a system is suggested with which a subscriber owning a present TV receiver Will continue to get the same picture quality as he does now. New receivers can be designed to provide substantially improved resolution and better color reception. The system uses two adjacent 6-MHz channels for each one now used. The upper channel is standard NTSC, while the lower channel is filled with a lower sideband that permits a 7-MHz video response, Present receivers use the upper channel, while new receivers will use signals from both channels.