To easily cope with change in methods of media. A CPU 22 controls a front end 21 including a tuner 41, a demodulator 42, and an error corrector 43 indirectly with a common control command, independent of a zone and a transmission medium. That is, an application program 22A of the CPU 22 creates a control command based on a command set defined in advance, and sends it out to the front end 21 via an interface 22B. The control application 40B of the front end 21 converts the control command transferred via the interface 40A into a data format recognizable for the tuner 41, the demodulator 42, and the error corrector 43, and transfers it to a driver 40C. The driver 40C controls each processing unit based on the control command.