Encoders; Encoding and decoding apparatus; Encoding and decoding apparatus and instruments; Transmitters and receivers for audio and video signals for transmission over twisted pair cables; Consumer electronic products, namely, audio amplifiers, audio speakers, audio receivers, electrical audio and speaker cables and connectors, audio decoders, video decoders, speakers, power conversion devices, power converters, and power inverters; Telecommunications equipment, namely, fiber-optic transceiv...