Systems and methods for low latency media defect detection
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United States of America Patent
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Oct 28, 2014
Grant Date -
Aug 8, 2013
app pub date -
Feb 8, 2012
filing date -
Feb 8, 2012
priority date (Note) -
Withdrawn
status (Latency Note)
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Abstract
Various embodiments of the present invention provide systems and methods for media defect detection. For example, a media defect detection systems is disclosed that includes a data input derived from a medium, a fast envelope calculation circuit that receives the data input and provides a fast decay envelope value based on the data input, a slow envelope calculation circuit that receives the data input and provides a slow decay envelope value based on the data input, and a media defect detection circuit. The media defect detection circuit receives the slow decay envelope value and the fast decay envelope value, calculates a ratio value of the fast decay envelope value to the slow decay envelope value, and asserts a defect output based at least in part on the comparison of the ratio value to a defect threshold value.
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