An FFT unit generates a frequency-domain signal for one-segment broadcasting and a frequency-domain signal for full-segment broadcasting. Under a good reception environment, the frequency-domain signal for the full-segment broadcasting is extracted by a switching control unit and the transmitted data for the full-segment broadcasting are recovered. When the reception environment deteriorates, both the one-segment broadcasting and the full-segment broadcasting are temporary demodulated. After a delay time due to the demodulation process has passed, a reception mode is switched from the full-segment broadcasting to the one-segment broadcasting.