A data reproducing controller for operating a device for reproducing data
at a high speed, which is recorded on a disc and includes an error
correction code. A PI correction circuit performs an error correction
process on a PI and causes a completion signal to go high whenever
processing of 182 bytes of data is completed. A counter circuit
sequentially increments a count value whenever the completion signal goes
high. A determination circuit compares the count value with a
predetermined set value and determines whether the data of which PI has
undergone the error correction process is a PO row based on the
comparison. The determination circuit causes a first control signal to go
low when the data is a PO row. A descrambling circuit skips the data that
is determined to be a PO row.