Apparatus for reproducing a digital signal

摘要

In an apparatus for reproducing a recorded digital signal and suitable for use in a data recorder (1), error detecting signals are generated (14) for respective reproduced header portions of a main data area and a sub-data area formed in each track, the error detecting signals are counted (30) for a predetermined period, and the counted value is compared with a predetermined value. A data error condition is determined in accordance with the comparison result, so that it is possible to simplify the circuit arrangement and detect an error condition in the recorded digital data.