Patent ID: 7286596
Filing Date: 2007-10-23
Classification: G11B

Abstract:
1. A method of training for a recording medium reproduction equalizer, comprising, in a training operation for optimizing a multiplication coefficient for each tap of an FIR equalizer equalizing a read signal read from a recording medium, the steps of: a) utilizing, as a restricted coefficient updating vector applied for updating the multiplication coefficient for each tap of an FIR filter, a vector obtained from projecting, onto a plane perpendicular to a predetermined restricting conditioning vector, a coefficient updating vector determined based on an equalizer error between the output of the FIR equalizer and a reproduction output determined therefrom, and a delayed input value for each tap of the FIR equalizer; and b) utilizing, as the predetermined restricting conditioning vector, a coefficient vector comprising the multiplication coefficients for the equalizer obtained upon calculating the equalizer error.