Patent ID: 7068573

Claim:
A reproducing device that irradiates a track of a recording medium with laser light and reproduces data stored on the track by using the light reflected from the track, the reproducing device comprising: signal-reading means for outputting at least one first read signal from at least one track adjacent to a main track and a second read signal from the main track for reproduction and; first filtering means for filtering the first read signal from the adjacent track; second filtering means for filtering the second read signal from the main track; multiplication means for multiplying an output from the first filtering means by an output from the second filtering means; estimated-value calculation means for calculating an estimated value of cross-modulation on the main track by using an output from the multiplication means; and cross-modulation removal means for removing a cross-modulation component caused by the adjacent track from the second read signal by subtracting the estimated cross-modulation value from the second read signal.