Track identification codewords having multiple bit error...

Details Track identification codewords having multiple bit error... Track identification codewords having multiple bit error...

2006-08-29

2006-08-29

Wellington, Andrea (Department: 2627)

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Data in specific format

C360S049000

Reexamination Certificate

active

07099095

ABSTRACT:
The present invention may be embodied in a disk drive comprising a rotating magnetic media having tracks identified by binary codewords, and in a related method. Each track codeword for a particular track within a contiguous band of tracks differs from a track codeword for an adjacent track within the contiguous band of tracks by a defined number of bits, and differs from a track codeword for a nonadjacent track within the contiguous band of tracks by at least the defined number of bits. The defined number N of bits is greater than four such that at least two bit errors may be corrected when reading a track codeword.

REFERENCES:
patent: 6115198 (2000-09-01), Reed et al.
patent: 6487032 (2002-11-01), Cloke et al.
Hadamard Matrix; downloaded from Mathworld Web Site Jan. 28, 2004.
Plackett.m; downloaded from Ibiblio Web Site Jan. 28, 2004.
A.J. Van Zanten; Minimal-Change Order and Separability in Linear; IEEE Transactions on Information Theory; vol. 39, No. 6, Nov. 1993; pp. 1988 & 1989.
Juriaan Simonis; On Generator Matrices of Codes; IEEE Transactions on Information Theory; vol. 38, No. 2, Mar. 1992; p. 516.

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