Ключевые слова: audiovisual, background, black, business, cinema, closeup, conference, demonstration, device, digital, display, education, electronic, entertainment, equipment, event, film, focus, information, lamp, lcd, lecture, led, lens, light, modern, movie, multimedia, new, nobody, object, office, one, pink, presentation, professional, projection, projector, screen, seminar, show, signal, system, technology, video, visual, watching,