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US 8,819,521 B2Granted
Systems and methods for short media defect detection using non-binary coded information
AssigneeLSI Corporation
InventorsFan Zhang, Weijun Tan, Haitao Xia, Shaohua Yang, Xuebin Wu, Wu Chang
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Abstract
Various embodiments of the present invention provide systems and methods for media defect detection. Such systems and methods may include data pre-processing and detection to identify a media defect.
Claims21
A data processing system, the data processing system comprising:
- a data detector circuit operable to apply a data detection algorithm to a symbol based data set guided by a decoded output to yield a symbol based detected output;
- a defect detector circuit including:
- a data pre-processing circuit operable to pre-process the symbol based detected output to yield a pre-processed output;
- and
- a binary data detection circuit operable to provide a defect indicator corresponding to a probable defect identified based on the pre-processed output;
- and
- a data decoder circuit operable to apply a data decode algorithm to a decoder input derived from the detected output modified based on the defect indicator to update the decoded output.
4 more elements
A method for data processing, the method comprising:
- applying a data detection algorithm by a data detector circuit to a symbol based data set guided by a decoded output to yield a symbol based detected output;
- pre-processing the symbol based detected output to yield a pre-processed output;
- providing a defect indicator corresponding to a probable defect identified based on the pre-processed output;
- and
- applying a data decode algorithm to a decoder input derived from the detected output modified based on the defect indicator to update the decoded output.
2 more elements
A storage device, the storage device comprising:
- a storage medium;
- a read/write head assembly operable to sense information from the storage medium and to provide a corresponding continuous signal;
- an analog to digital converter circuit operable to sample the continuous signal synchronous to a sampling clock to yield a set of digital samples;
- an equalizer circuit operable to equalize the set of digital samples and to provide a corresponding symbol based equalized output;
- a data detector circuit operable to apply a data detection algorithm to a symbol based equalized output guided by a decoded output to yield a symbol based detected output;
- a defect detector circuit including:
- a data pre-processing circuit operable to pre-process the symbol based detected output to yield a pre-processed output;
- and
- a binary data detection circuit operable to provide a defect indicator corresponding to a probable defect identified based on the pre-processed output;
- and
- a data decoder circuit operable to apply a data decode algorithm to a decoder input derived from the detected output modified based on the defect indicator to update the decoded output.
8 more elements
Dependencies are inferred from the claim text.