Patent ID: 9082418
Filing Date: 2015-07-14
Classification: G11B

Abstract:
1. A method for reading data from a storage medium using a reader, the method comprising: reading a first signal with a reader head of the reader at a first position of the storage medium, wherein the first signal includes a first portion corresponding to a first track and a second portion corresponding to a second track; reading a second signal with the reader head of the reader at a second position of the storage medium, wherein the second signal includes a third portion corresponding to the first track and a fourth portion corresponding to the second track; estimating, based on the first portion and the second portion, (i) a first ratio of an amplitude of the first signal contributed by the first track with the reader head of the reader at the first position and (ii) a second ratio of the amplitude of the first signal contributed by the second track with the reader head of the reader at the first position; estimating, based on the third portion and the fourth portion, (i) a third ratio of the amplitude of the second signal contributed by the first track with the reader head of the reader at the second position and (ii) a fourth ratio of the amplitude of the second signal contributed by the second track with the reader head of the reader at the second position; and determining data stored at a pre-determined position of the storage medium based on the estimated first ratio, the estimated second ratio, the estimated third ratio, and the estimated fourth ratio, wherein the storage medium comprises a plurality of tracks including the first track and the second track, each track having a width smaller than a width of the reader head of the reader.