| 摘要 |
<p>The invention refers to a method and an apparatus for recognizing the head position in the radial direction of a recording medium with great precision by discretely forming servo-patterns in circular direction of a rotatable recording medium, each servo-pattern comprising at least two sub servo-patterns, wherein peak values of reproduced signal amplitudes of the above-mentioned respective sub servo-patterns are compared respectively thereby to form a first binary-valued information, subsequently adding a first offset onto, at least, one of those peak values of the aforementioned reproduced signal amplitude in compliance with a value of said first binary-valued information, then comparing respective peak values to each other again thereby to form a second binary-valued information, further adding a second offset onto a peak value on which said first offset was added in compliance with a value of the second binary-valued information, or further adding a different offset from the first offset onto a peak value on which no offset was added at the time when second binary-valued information was produced, then comparing respective peak values to each other again, thereby to form a third binary-valued information, and then repeating the above-mentioned steps. <IMAGE></p> |
