Patent ID: 6282042
Filing Date: 2001-08-28
Classification: G11B,H03H,H03L,H04L

Abstract:
Apparatus for retrieving from a magnetic tape storage medium signals including user data stored as successive diagonal tracks having alternate first and second azimuths, said apparatus including:a head arrangement for successively reading said tracks of alternate first and second azimuths,an adaptive equalizer having:a coefficient store for storing a set of filter coefficients for the signal read from the tracks of the first azimuth and a set of filter coefficients for the signal read from the tracks of the second azimuth,an adaptive filter for applying equalization to the user data signals read from said tracks of the first and second azimuth in accordance with respective sets of adapting filter coefficients and for deriving equalized user data output signals, anda coefficient adapter for:(a) adapting each of said sets of filter coefficients of the user data signals from said tracks of first and second azimuth in accordance with the derived equalized user data output signals of said adaptive filter, and(b) loading in said coefficient store a set of coefficients corresponding to the adapted coefficients derived by the coefficient adapter for use in equalization of a following track of that azimuth, the coefficient store being loaded with adapted coefficient values taken part way through the tracks of the first and second azimuth.