Information reproducing device and information reproducing method

摘要

There is provided an information reproducing device which outputs an equalization signal P by applying equalization processing to a signal detected from a storage medium based on equalization coefficients C₀ to C_N, outputs a decoding signal d by applying maximum likelihood decoding processing based on reference levels R₀ to R₆, generates an ideal waveform signal I based on the equalization signal, and has a target waveform generator which generates a target waveform signal T by changing at least one level of the ideal waveform signal I, wherein erroneous decoding is reduced by optimizing reproduction processing parameters such as the equalization coefficients C₀ to C_N or the reference levels R₀ to R₆ based on the target waveform signal T and the information on the storage medium is stably reproduced.