Patent ID: 7583319

Claim:
A data relay device for connecting receiving equipment which employs a control system to notify control data indicating its own specification to transmitting equipment to receive data in a form matching to its own specification and employs the control system in a latter stage, the data relay device comprising: a control data acquiring device configured to acquire the control data from the receiving equipment; specification determining device configured to determine that its own specification is in a higher order or not in comparison a specification indicated by the control data from the receiving equipment with its own specification; a control data notifying device configured to rewrite the control data from the receiving equipment by its own control data to notify it to the transmitting equipment if the determining device determines that its own specification is in the higher order; a data reproducing device configured to receive the data transmitted from the transmitting equipment to reproduce it in accordance with its own specification; and a data transmitting device configured to convert the received data from the transmitting equipment into the specification of the receiving equipment to transmit it thereto.