Patent ID: 7826323
Filing Date: 2010-11-02
Classification: G11B

Abstract:
1. A reproducing apparatus for reproducing information from a recording medium on which information is recorded using a run-length-limited code in which a shortest code and a longest code are defined, the reproducing apparatus comprising: a signal reading unit to read a signal from the recording medium: an equalizing unit to perform partial response equalization on the signal and output an equalized signal; a maximum likelihood decoding unit to perform maximum likelihood decoding on the equalized signal and outputting a binary data string; a determining unit to determine whether or not the shortest code in the binary data string obtained by the maximum likelihood decoding is a result of a decoding error during the maximum likelihood decoding, based on information on an amplitude of the equalized signal corresponding to the shortest code; a code correcting unit to correct the shortest code in the binary data string, in accordance with a result of the determination of the determining unit; and a data demodulating unit to demodulate the binary data string obtained through the code correcting unit to obtain reproduction data from the recording medium.