Patent ID: 7216286
Filing Date: 2007-05-08
Classification: G11B

Abstract:
1. A data reproducing method for reproducing recorded data from a recording medium wherein said recorded data is generated by generating an error correction block by adding error correcting parity to data comprising main data, identification data and error correcting parity for the main data and the identification data; and converting the data in the error correction block by superimposing data, generated from data conversion information, on the data in the error correction block, said data reproducing method comprising the steps of: reading out the data conversion information from the recording medium; generating the superimposed data from the data conversion information; de-converting the converted data by using the data conversion information read out and the superimposed data generated; calculating syndromes of the de-converted data and, if one of the calculated syndromes, Sn (n is an integer), is not zero, making a judgment that the last data of the de-converted data includes an error, correcting the last data and returning the corrected last data into the error correction block; and reproducing the data in the error correction block by removing the error correcting parity from the error correction block.