INFORMATION REPRODUCING METHOD AND ITS DEVICE

PROBLEM TO BE SOLVED: To enlarge amplitude of a close packed repeating signal with inter- code interference left small by scanning an information mark recorded in a track on a recording medium with a laser beam to generate a reproducing signal and reducing inter-code interference while successively changing an equalization coefficient in accordance with a level of the reproducing signal. SOLUTION: A signal 231-1 after compensating an phase which adds delay to a signal 106 after automatically adjusting a gain and an equalization coefficient 221-1 having polarity are made to the same phase with a delay circuit 230-1. A result wherein the signal 231-1 after compensating the phase is multiplied by the signal 221-1 having polarity is outputted as a signal 161-1 after adjusting amplitude with a multiplying circuit 200-1. All of these signals 161-1 to 161-n after adjusting amplitude are added with an adding circuit 170 and a signal 108 after equalization is outputted. Moreover, a value of a coefficient generators 210-1 to 210-n and a value of delay circuits 150-2 to 150-n are preset so that inter-cocie interference included in the signal 108 after equalization becomes minimum.