apparatus and instruments for viewing, recording, transmission, processing and reproduction of sound or images, namely, video-audio enhancers, color processors, signal switchers, signal distributors, [ RF processors, ] special effects generators, video encoders and decoders, video standard converters, video time base correctors, computer genlock equipment, computer-controlled video equipment, namely, video matrix and processing control, computer interface products, namely, [ TTL (transistor-t...