Error detection/correction and fault detection/recovery – Pulse or data error handling – Replacement of memory spare location – portion – or segment
Reexamination Certificate
2006-05-30
2010-02-23
Kerveros, James C (Department: 2117)
Error detection/correction and fault detection/recovery
Pulse or data error handling
Replacement of memory spare location, portion, or segment
Reexamination Certificate
active
07669091
ABSTRACT:
Apparatuses and methods for defect replacement when an optical storage medium is read are provided. When the defect management is LOW, a pick-up head retrieves a set of data from the optical storage medium; a defect detector detects whether there is a defect in the set; if yes, a processor determines whether a replacement for the defect is in the set; and if yes, an interface transmits the replacement from the set. When the defect management is CRD, a buffer temporarily stores data retrieved from the optical storage medium; a defect detector detects whether there is a set of defects in the data; if yes, a comparator compares a length of the set of defects with a defect threshold length; a pick-up head reads more data from the optical storage medium continuously until the buffer reaches a buffer threshold if the length is compared shorter than the defect threshold length; and the pick-up head reads a set of replacements for the set of defects directly if the length is compared longer than the defect threshold length.
REFERENCES:
patent: 5442638 (1995-08-01), Awad et al.
patent: 6782488 (2004-08-01), Park et al.
patent: 7380178 (2008-05-01), Park et al.
patent: 1529316 (2004-09-01), None
Chen Shih-Hsin
Hsueh Ching-Wen
Kerveros James C
Ladas and Parry LLP
Mediatek Inc.
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