| 摘要 |
The present invention provides a data demodulation device, a data demodulation method, a reproduction device for magnetically recorded data, and a program, with which magnetic data can appropriately be demodulated with great accuracy even though a transfer speed of a magnetic recording medium fluctuates on a grand scale, or a recording accuracy of the magnetic data recorded in a magnetic recording medium is low. Concretely to describe, the data demodulation device calculates a first absolute value of a difference between an interval for judgment and a first standard interval assigned in a template or a second absolute value of a difference between the interval for judgment and a second standard interval, with respect to each bit pattern as well as each bit of the bit pattern; and multiplies the first absolute value corresponding to the difference between the second standard interval and the interval for judgment, by a coefficient which is a greater value than that for the first absolute value; and calculates a sum value that is a sum of the first positive value and/or the second positive value of each bit pattern, wherein the first positive value and the second positive value are calculated for each bit in the comparison operation unit and these values are those after the multiplication by the coefficient; and then identifies the bit pattern that gives a minimum of the calculated sum value, as the preliminary data row. |
