Interactive computer-based information display system

摘要: An interactive, computer-based system for combining on a common display (40), as overlaid images, video signals from source of images (such disc player; 20) with graphics and text computer (30), particularly use in computer-aided instruction, information retrieval visual annotation or supplementation images. The are converted to RGB format (or some other non-phase modulated format) by converter (80) if not already so encoded. They then supplied switch (90) which receives the graphics-signals, also format, another input. output is (40). controlled an attribute signals, controlling selection pixel-by-pixed basis. A keyboard (70) device connected allows user provide input and, responsive thereto, directs operation source, such changing frames disc, providing image enhancement masking, etc.