Patent ID: 6909566

Claim:
A magnetic recording/reproducing apparatus including a magnetic recording media forming a plurality of tracks concentrically, wherein a write frequency differs between adjacent tracks in the plurality of tracks, the magnetic recording media form concentrically the plurality of tracks each having data sectors having a PLL pattern and a data area, wherein signal components of the data write frequencies of a read-purposed track and the adjacent tracks of the read-purposed track are extracted from a read back signal of the PLL pattern, and wherein a crosstalk amount is detected from the adjacent tracks, the read-purposed track and both tracks adjacent to the read-purposed track are reproduced, wherein a crosstalk component is estimated in accordance with the crosstalk amount of the adjacent tracks and read back signals of the adjacent tracks, and wherein the crosstalk component is subtracted from a read back signal of the read-purposed track, reducing the crosstalk from the adjacent tracks, and a processing to reduce the crosstalk is performed by use of values of previously determined levels as a crosstalk amount necessary for reducing the crosstalk, and wherein when the reproduction is unable, the processing to reduce the crosstalk is performed by use of values of other crosstalk levels to perform the reproduction.