Patent ID: 9105277
Filing Date: 2015-08-11
Classification: G11B

Abstract:
1. A controller comprising: an interference canceller configured to produce a first correction signal and a second correction signal, the first correction signal being obtained by cancelling a signal interference component from a second track in a signal of a first track, the second correction signal being obtained by cancelling a signal interference component from the first track in a signal of the second track, the first track and the second track being adjacent to each other in a disk medium; an equalizer configured to obtain a noise included in the first correction signal by using a noise component of the first track and a noise interference component from the second track, correct the first correction signal by using the obtained noise, and equalize the corrected first correction signal, the noise component of the first track being calculated based on a noise component of the first track at a first timing and a noise component of the first track at a second timing which is earlier than the first timing, the noise interference component from the second track being calculated based on a noise interference component from the second track at the first timing and a noise interference component from the second track at the second timing; and a decoder configured to decode the equalized first correction signal.