OPTICAL DISC REPRODUCING DEVICE AND OPTICAL DISC REPRODUCING METHOD

摘要

An optical disc reproducing device is provided which is capable of setting an optimum PR class for the comprehensive frequency characteristic of an optical disc including the recording characteristic and reproducing characteristic. An optical disc reproducing device according to the present invention relates to an optical disc reproducing device which performs reproduction from an optical disc using the PRML method. The optical disc reproducing device comprises a Viterbi decoding unit which generates binary data using maximum likelihood decoding processing based upon multi-value reproduced data obtained by sampling a reproduced signal from the optical disc. The Viterbi decoding unit generates the binary data based upon an optimum PR class determined based upon the multi-value reproduced data and the binary data in a predetermined determination period.