Electronic apparatus for preparing signals for transmission onto an electromagnetic pathway; electronic apparatus for receiving and decoding signals from an electromagnetic pathway; software for preparing signals for transmission into an electromagnetic pathway; software for receiving and decoding signals from an electromagnetic pathway; decoders; encoders; apparatus for decoding encoded signals; data transmission cables; cables for electronic transmission of signals and images; flexible electric cables; insulated electrical cables; electric interface cables; cable junctions for electric cables; electric couplings for electrical cables; printed circuit boards; printed circuits; printed electric circuits; integrated circuit boards; integrated circuits; computer chips; computer circuit boards; electronic circuit boards; integrated circuits for processing video and multimedia signals; interface cards for computers in the form of printed circuits; interface cards in the form of printed circuits for electrical apparatus; transmitters for the transmission of electronic signals; receiving terminals for electrical signals; apparatus for electrical signal transmission, namely, transmitters and receivers for video and multimedia signal transmission; converters for analogue signals, namely, transcoding circuits to facilitate long-distance video communication; converters for digital signals, namely, transcoding circuits to facilitate long-distance video communication