Technical Aspects of the New World of Multiformat DTV Embodying Progressive, Interlaced, and Segmented Frame Video Format

摘要

In the past year, an unprecedented flurry of industry activity on the product and system development (and standardization) of a 24 frame progressive scan HDTV production system (now generally known as the 24P-system), has been driven by two marketplace imperatives: DTV multiformat production and a digital adjunct to motion picture film for movie production. Issues of acquisition, transport, and post-production relating to this format must all be encompassed in their respective overall system designs. 24P offers novel solutions to managing post-production in our new world of multiformat DTV, which encompasses both progressive and interlaced scanning. Suddenly, the old established world of analog 50/60-Hz interlaced video is about to be replaced by mixed progressive, interlaced, and segmented frame digital video—all operating at a variety of frame and field rates. Understanding this new world, and the options available to sensibly implement flexible systems, will be helped by a better understanding of the essential differences between interlaced, progressive, and segmented frames video structures. This paper will attempt to outline the basic technical characteristics of each.