Information reproducing apparatus and reproducing method

摘要: In a magneto-optic disc apparatus corresponding to six-value four-status Viterbi decoding method, an RAA has 12 registers so as separately adapt amplitude reference values for address portion and data on disc. Normally, stored of the at time reproducing operation been just completed are used initial adapting process in next operation. On other hand, when cannot be correctly reproduced thereby read-retry or like is preformed, predetermined that values. this case, not performed.