Apparatus for the recording of sound or images; apparatus for the reproduction of sound or images; apparatus for the transmission of sound or images; devices for converting image information to digital signals for computers; digitally stored images; electronic image recording apparatus; electronic image recording instruments; image recording apparatus; viewers; cameras; closed circuit television security apparatus; electric security apparatus for buildings; video camera security installations; computer hardware; computer software; computer peripheral devices; audio apparatus for vehicles; control apparatus for audio signals; control apparatus for computers; control apparatus for video reproducing apparatus; electrical digital control apparatus