Patent ID: 7403460
Filing Date: 2008-07-22
Classification: G11B

Abstract:
1. An information reproducing apparatus for detecting data recorded in a medium by Partial Response and Maximum Likelihood signal processing units and an equalizer, the apparatus comprising: a table which stores plural pairs of a true pattern and a false pattern; a pattern comparator which compares the detected data with the true patterns and the false patterns stored in the table to find a pair of the true pattern and the false pattern one of which pattern coincides with the detected data; and a calculating device which, when the pattern comparator finds the pair, calculates: a first Euclidean distance E a second Euclidean distance E a difference between the first Euclidean distance and the second Euclidean distance, and an average (μ) and a standard deviation (σ) of a distribution of the difference, wherein the detected data is evaluated based on where F(0) denotes a probability of occurrence by mistaken identification from a true pattern to a false pattern.