Patent ID: 6134211
Filing Date: 2000-10-17
Classification: G11B

Abstract:
A crosstalk removing device for use in a recorded information reproducing apparatus which samples a read signal read from a recording track on a recording medium to produce a read sample value sequence, and removes from the read sample value sequence crosstalk from tracks adjacent to said recording track to produce a crosstalk removed read sample value sequence, said crosstalk removing device comprising:a filter coefficient calculating circuit for calculating filter coefficients which force an error value present in said crosstalk removed read sample value sequence to converge to zero;a variable coefficient filter for filtering said read sample value sequence based on said filter coefficients to produce crosstalk components from the adjacent tracks of said recording track;a subtractor for subtracting said crosstalk components from said read sample value sequence to output the difference as said crosstalk removed read sample value sequence; andmeans for providing predetermined fixed coefficient values as filter coefficients of said variable coefficient filter instead of said filter coefficients calculated by said filter coefficient calculating circuit during a time period in which said read sample value sequence remains in an asynchronous state.