HOUSE MARK FOR VIDEO AND AUDIO APPARATUS, NAMELY, SIGNAL TESTERS, MONITORS, CONVERTERS, PROCESSORS, ENCODERS, DECODERS, SIGNAL GENERATORS, ANALYZERS, PLAYERS, SCREEN OPTIMIZERS, NOISE REDUCERS, SWITCHERS, ROUTERS, CORRECTORS, SYNCHRONIZERS, AMPLIFIERS, SERIALIZERS, AND DESERIALIZERS, DIGITAL VIDEO EFFECTS SYSTEMS, AND FOR ELECTRONIC APPARATUS FOR TELEVISION BROADCAST AND TELEVISION STUDIOS, NAMELY, ANTENNAS, TRANSMITTERS, ENCODERS, DECODERS, RECEIVERS, AMPLIFIERS, CONVERTERS, MONITORS, MODULATORS AND DEMODULATORS, MIXERS, EQUALIZERS, SIGNAL GENERATORS, SYNCHRONIZERS, TIME-BASE CORRECTORS, COLOR CORRECTORS, NOISE-REDUCERS, INTERFACES, TEST PATTERN GENERATORS, SIGNAL COMPRESSION APPARATUS, OSCILLATORS AND FILTERS; AND SOFTWARE FOR THE OPERATION, CONTROL AND MONITORING OF ALL THE AFORESAID APPARATUS