Ключевые слова: audiovisual, background, blue, business, ceiling, cinema, classroom, computer, conference, digital, education, entertainment, equipment, event, film, gray, home, indoors, interior, lamp, lcd, lens, light, meeting, modern, movie, multimedia, object, office, overhead, presentation, projection, projector, roof, room, screen, seminar, show, slide, technology, training, video, visual, white, working,