Patent ID: 7826326
Filing Date: 2010-11-02
Classification: G11B

Abstract:
1. A data reading method used in a reading device that is for reading a holographic storage medium having a plurality of data areas, each of the data areas having a plurality of data pages, each of the data pages forming a data image that has at least one reserved block pattern in the reading device, comprising: (a) searching the reserved block pattern of the data image corresponding to a first data page within a first searching region so as to obtain a first pattern position of the reserved block pattern; (b) searching the reserved block pattern of the data image corresponding to a second data page within a second searching region so as to obtain a second pattern position of the reserved block pattern; (c) determining a third searching position according to the first pattern position and the second pattern position; and (d) searching the reserved block pattern of the data image corresponding to a third data page within a third searching region whose center is at the third searching position.