Method for reproducing phase information signals in an information recording device

摘要

The data row Pw(i) of phase information obtained by reading preformatted phase patterns on an information recording medium by the head consists of the remainders obtained by dividing the data row of the phase information indicating the original track location by 2pi. The data row Pw(i) in a convoluted state is entered; a data row dPw(i) consisting of the differential values between adjacent data in the data row Pw(i) is generated; a two-step differential data row deltaPw(i) consisting of the differential values between adjacent data in the data row dPw(i) is generated; the cumulative coefficient k(i) is adjusted according to the section region where the value of the two-step differential data row deltaPw(i) belongs; a differential data row dPu(i) (=deltaPw(i)+2pixk(i)) is generated by applying a reconstructing process for solving the convolution process with the use of the found cumulative coefficient k(i); and a reconstructed phase information data row Pu(i) is obtained by further applying integration.