Patent ID: 7009922

Claim:
A cross-talk removal apparatus that removes cross-talk from one or the other or both adjacent tracks, which is contained in the reproduction signal from a main track on a data-recording medium that is to be reproduced, based on the reproduction signal from said main track and the reproduction signals from said one or the other or both adjacent tracks and comprising: a cross-talk removal device of using a variable filter with a controllable coefficient to extract the cross-talk from the reproduction signal of said one or the other or both adjacent tracks and removing said cross-talk from the reproduction signal of said main track; a coefficient control device of controlling the coefficient of said variable filter using a changeable control frequency zone; and a control frequency zone setting device of determining the recording state of said one or the other or both adjacent tracks and switching said control frequency zone according to said recording state, wherein said control frequency zone setting device sets said control frequency zone to be wide for a specified period of time when the recording state of said one or the other or both adjacent tracks changes from an non-recorded state to a recorded state.