Abstract: A compatibility adapter configured for connection to an external connection terminal of a new-generation game device is provided. An old-generation processor unit is a processor unit compatible with the processing function of an old-generation game device. When it is determined that the type of a recording medium storing application software is for the old-generation game device, a hub receives data, which has been input to the new-generation game device, from the new-generation game device via the external connection interface. Data extracted from a received packet is supplied to the old-generation processor unit and processed accordingly. The hub supplies the processed data to the new-generation game device via the external connection interface.

Abstract: A signal converter is provided with a terminal output unit having an integrated signal conversion unit and signal switching unit, a connection terminal connected to an antenna terminal and a flexible rod-shaped cable, which joins together the connection terminal and signal conversion and switching unit. Because the signal conversion unit and signal switching unit are constituted integrally and connection terminal of signal output unit is independent from the signal conversion and switching unit via a rod-shaped cable, the size of the connection terminal that plugs into the antenna terminal can be reduced, thereby making it possible to insert signal output unit into the antenna terminal of the television receiver simply and securely.