Adaptive servo address mark detection

摘要

Various embodiments of the present inventions provide systems and methods for adaptive servo address mark detection.

主权项

1. An apparatus for detecting a servo address mark comprising:
a Euclidean distance calculator operable to calculate a Euclidean distance between a received data sample from a data stream and an ideal data sample for the servo address mark; an accumulator operable to accumulate the Euclidean distance over a sliding window across the data stream to yield an accumulated Euclidean distance; a threshold comparator operable to determine that the servo address mark has been detected when the accumulated Euclidean distance is less than a threshold; and a threshold adaptation circuit operable to generate the threshold based on a plurality of received data samples taken from within the servo address mark and on a second plurality of received data samples taken from outside the servo address mark.