Apparatus for recording, transmission or reproduction of sound or images; Computer programs for editing images, sound and video; Apparatus for recording sound; Apparatus for the transmission of sound; Apparatus for the reproduction of sound; Video recording machines; Apparatus for the transmission of images; Video reproducing apparatus; Editing apparatus, namely, analog to digital converters, digital to analog converters and data synchronization modules; Computer programs and software for the editing, conversion and synchronization of video and audio signals; Apparatus for digital/analog conversion and analog/digital conversion of video and audio signals, namely, analog to digital converters and digital to analog converters; Computer software for audio embedding and audio de-embedding; Computer software for frame synchronization for down and up conversion; Fiber optic connectors for video and audio signals; Fiber optic converters; Optical multiplexers; Video signal converters, namely, SDI to high definition video converters, high definition video to SDI converters and video signal converters; Multi-channel transmitters and receivers for video and audio signals; Distribution amplifiers and switches for multi-channel transmitters and receivers for video and audio signals; Multiplexers and de-multiplexers for processing video and audio signals