Recovery of correct data is possible by correcting errors included in received data without using a special error correction control procedure. Error correction patterns Ea1-Ea5 and Eb1-Eb3 derived using the characteristics of the data modulation method are prepared in advance. These error correction patterns Ea1-Ea5 and Eb1-Eb3 are prepared corresponding to each of the data modulation methods. Then, when an error is detected in the received data, the error is corrected by applying the error correction pattern corresponding to the modulation method of that received data to the same data.