The Digital Audio Broadcasting (DAB)system has been standardized by the European Telecommunications Standards Institute (ETSI) since 1995, and currently lots of countries use this standard including Taiwan. Despite the numerous papers and these discussing the DAB techniques, however, not too many of them address the issue of implementation. Therefore, we decide to implement the digital down converter, the channel demodulator, and the MPEG 1/2 audio decoder of the DAB system using a PC. In own implementation, we also need to perform the time and frequency synchronizations, whose techniques are also mentioned in the thesis. We have tested own program using“real”data obtained from a DAB receiver. The results show that own program work correctly.