Transmission of FM video signals over various lines

A communications apparatus for a vehicle for communicating frequency modulated (FM) video signals through an electrical line of the vehicle, the electrical line for transmitting an electrical current from a first point of the vehicle to a second point of the vehicle for powering a load connected to the electrical line proximate to the second point, the apparatus comprising:

• a modulator for frequency modulating video data to produce a frequency modulated carrier signal having a first preselected frequency;
• a transmitter having an output impedance, connected to the modulator, for transmitting the modulated carrier signal from the first point to the second point over the electrical line;
• and
• a first coupler connected between the electrical line and the transmitter for matching the output impedance of the transmitter to a characteristic impedance of the electrical line, wherein the first coupler comprises linear phase means for communicating the modulated carrier signal to the electrical line without significant phase distortion.

A system for transmitting frequency modulated (FM) video signals over electrical lines, the electrical lines generally provided for delivering electricity to a plurality of electrical outlets, wherein a first video display device is electrically connected to one of the plurality of electrical outlets, the system comprising:

• a first FM transmitter subsystem comprising:
• a first FM modulator connected to the video display device for receiving video signals therefrom and for frequency modulating the video signals to produce a modulated carrier signal having a first preselected frequency;
• a first transmitter having an output impedance, connected to the first FM modulator, for transmitting the modulated carrier signal;
• and
• a first coupler connected between the electrical line and the first transmitter for matching the output impedance of the first transmitter to a characteristic impedance of the electrical line, wherein the first coupler comprises linear phase means for communicating the modulated carrier signal to the electrical line without significant phase distortion.

A communications apparatus for communicating frequency modulated (FM) video signals through an electrical line having a characteristic impedance, the apparatus comprising:

• a first FM modulator for frequency modulating the video data to produce a frequency modulated carrier signal having a first preselected frequency;
• a first transmitter having an output impedance, connected to the first FM modulator, for transmitting the modulated carrier signal;
• a first receiver having an input impedance for receiving the modulated carrier signal;
• a first FM demodulator electrically connected to the first receiver for demodulating the received modulated carrier signal to produce a demodulated carrier signal having a second preselected frequency;
• and
• a wireless remote-control (R/C) transmitter for transmitting data signals to the first receiver.

A communications apparatus for communicating MPEG I modulated signals through an electrical line having a characteristic impedance, the apparatus comprising:

• a signal processor for converting video data to MPEG I video data;
• a first modulator for modulating the MPEG I video data to produce a modulated carrier signal having a first preselected frequency;
• and
• a first transmitter having an output impedance, connected to the first modulator, for transmitting the modulated carrier signal.

A communications apparatus for communicating MPEG II modulated signals through an electrical line having a characteristic impedance, the apparatus comprising:

• a signal processor for converting video data to MPEG II video data;
• a first modulator for modulating the MPEG II video data to produce a modulated carrier signal having a first preselected frequency;
• and
• a first transmitter having an output impedance, connected to the first modulator, for transmitting the modulated carrier signal.