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US 9,548,081 B2Granted
Systems and methods for multi-track media defect detection
AssigneeAvago Technologies General IP (Singapore) Pte. Ltd.
InventorsWeijun Tan, Shaohua Yang
Life of this patent
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Abstract
Systems, methods, devices, circuits for data processing, and more particularly to systems and methods for data processing to identify a defect on a medium.
Claims20
A media defect detection system, the system comprising:
- a media defect detector circuit operable to:
- generate a first defect indicia for a location on a first track of a storage medium, wherein the first defect indicia includes a first low pass filtered value generated based upon data from the first track, and
- generate a second defect indicia for a location on a second track of the storage medium, wherein the second defect indicia includes a second low pass filtered value generated based upon data from the second track, and wherein the location on the second track corresponds to the location on the first track;
- and
- a multi-track defect combining circuit operable to generate a media defect signal based upon both the first defect indicia and the second defect indicia, wherein the multi-track defect combining circuit includes a multiplier circuit operable to multiply the first low pass filtered value and the second low pass filtered value to yield an interim product.
2 more elements
A method for identifying media defects on a storage medium, the method comprising:
- accessing a first data set from a first track of a storage medium;
- accessing a second data set from a second track on the storage medium;
- generating a first defect indicia for a location on the first track based upon the first data set, wherein the first defect indicia includes a first division product generated based upon data from the first track;
- generating a second defect indicia for a location on the second track based upon the second data set, wherein the second defect indicia includes a second division product generated based upon data from the second track, and wherein the location on the second track corresponds to the location on the on the first track;
- and
- generating a media defect signal based upon both the first defect indicia and the second defect indicia, wherein generating the media defect signal includes multiplying the first division product and the second division product to yield an interim product.
3 more elements
A media defect detection system, the system comprising:
- a storage medium including at least a first track and a second track;
- a means for:
- generating a first defect indicia for a location on the first track, wherein the first defect indicia includes a first division product generated based upon data from the first track, and
- generating a second defect indicia for a location on the second track, wherein the second defect indicia includes a second division product generated based upon data from the second track, and wherein the location on the second track corresponds to the location on the first track;
- and
- a means for generating a media defect signal based upon both the first defect indicia and the second defect indicia, wherein the means for generating a media defect signal based upon both the first defect indicia and the second defect indicia includes a multiplier circuit operable to multiply the first division product and the second division product to yield a product.
3 more elements
Dependencies are inferred from the claim text.