| 摘要 |
PROBLEM TO BE SOLVED: To accurately obtain the amount of partial eraser by eliminating partial eraser measuring errors even when a signal waveform to be reproduced includes amplitude asymmetry. SOLUTION: When a reproducing signal is generated from the pattern signal of a predetermined cycle recorded in a magnetic recording medium, the amount of partial eraser is calculated by using first and second 1T pattern signal waveforms of bit cycles T whose polarities are reversed from each other, and first and second 3T pattern signal waveforms of bit cycles nT whose polarities are similarly reversed. COPYRIGHT: (C)2007,JPO&INPIT
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