Abstract: A system is described for transmitting video signals over various communication media using digital signal processing techniques. An embodiment of the system uses an orthogonal frequency division multiplexing (OFDM) modulation process that enables high-speed data communications of Ethernet and/or MPEG or JPEG or H264 compressed or uncompressed digital video. A second embodiment frequency modulates the OFDM modulated signal (FM-OFDM). The first and second embodiments are implemented with a transmit Ethernet interface, an MPEG or JPEG or H264 compressed or uncompressed digital video capture device, and a modem including a modulator and demodulator that provides communication with several other modem devices along communication media such as power lines, wireless (air), cable, or twisted pairs.

Abstract: A system is described for transmitting video signals over various communication media using digital signal processing techniques. An embodiment of the system uses an orthogonal frequency division multiplexing (OFDM) modulation process that enables high-speed data communications of Ethernet and/or MPEG or JPEG or H264 compressed or uncompressed digital video. A second embodiment frequency modulates the OFDM modulated signal (FM-OFDM). The first and second embodiments are implemented with a transmit Ethernet interface, an MPEG or JPEG or H264 compressed or uncompressed digital video capture device, and a modem including a modulator and demodulator that provides communication with several other modem devices along communication media such as power lines, wireless (air), cable, or twisted pairs.

Abstract: An apparatus is provided for high frequency multiplexed electrical line communication for cable TV, telephone, internet, security and other control applications over the mid and low voltage power lines and directly through the transformers. The apparatus includes a transmitter, a receiver, a modem, a multiplexer and multiple couplers at each of two or more locations along an electrical line. The couplers have capacitive circuits serially connected with an air-core or dielectric-core transformer. The capacitive circuits resonate with the transformer at a preselected frequency. The coupler eliminates noise and is matched to the characteristic impedance of the line at the preselected frequency, which linearizes communication on the line and allows high speed data and voice communication over long distances. Multiple modulators and demodulators are used to produce multiple modulated carrier frequencies.

Abstract: An apparatus is provided for high frequency multiplexed electrical line communication for cable TV, telephone, internet, security and other control applications over the mid and low voltage power lines and directly through the transformers. The apparatus includes a transmitter, a receiver, a modem, a multiplexer and multiple couplers at each of two or more locations along an electrical line. The couplers have capacitive circuits serially connected with an air-core or dielectric-core transformer. The capacitive circuits resonate with the transformer at a preselected frequency. The coupler eliminates noise and is matched to the characteristic impedance of the line at the preselected frequency, which linearizes communication on the line and allows high speed data and voice communication over long distances. Multiple modulators and demodulators are used to produce multiple modulated carrier frequencies.

Abstract: An apparatus for communication of electric or electromagnetic signals over air includes a transmitter or receiver and a coupler. The coupler has a capacitive circuit connected with an air-core or dielectric-core transformer. The capacitive circuit resonates with the transformer at a preselected frequency. The coupler eliminates noise and is matched to the characteristic impedance of the air at the preselected frequency, which linearizes communication and allows high-speed data and voice communication over long distances.

Abstract: An improved apparatus for high frequency multiplexed electrical line communication for cable TV, telephone, internet, security and other control applications over the mid and low voltage power lines and directly through the transformers includes a transmitter, a receiver, a modem, a multiplexer and multiple couplers at each of two or more locations along an electrical line. The couplers have capacitive circuits serially connected with an air-core or dielectric-core transformer. The capacitive circuits resonate with the transformer at a preselected frequency. The coupler eliminates noise and is matched to the characteristic impedance of the line at the preselected frequency, which linearizes communication on the line and allows high speed data and voice communication over long distances.