Extended Definition Television with High Picture Quality

Present-day television systems do not offer optimum picture quality, particularly in new applications such as interactive videotex and still picture transmission, and where larger and brighter screens are used. There is a growing demand for improved resolution of details and absence of line crawl and flicker. This article proposes concepts for compatible improvements in picture quality, using the line numbers of present standards, by means of digital signal processing. Improved resolution through use of optimum pre- and postfiltering, the timeplex techniques of the MAC system, and the new FM channels with higher bandwidth are discussed.