A media converter capable of converting digital data of a unidirectional interface to digital data of a bidirectional interface or converting vice versa and converting digital data in commercial use to digital data for consumers or converting vice versa so that consumers are able to obtain even high quality images is provided. The media converter has a function for inputting digital data of a unidirectional interface and converting the inputting digital data to digital data of a bidirectional interface, and a function for inputting digital data of a bidirectional interface and converting the inputting digital data to digital data of a unidirectional interface, wherein the unidirectional interface is an HD-SDI (High Definition Serial Data Interface) format digital interface, and the bidirectional interface is a digital interface conforming to IEEE1394.