RLL encoding for LTO-5 tape

Details RLL encoding for LTO-5 tape RLL encoding for LTO-5 tape

2007-07-05

2008-10-07

Mai, Lam T (Department: 2819)

Coded data generation or conversion

Digital code to digital code converters

To or from run length limited codes

C341S050000

Reexamination Certificate

active

07432834

ABSTRACT:
Method and apparatus are provided for encoding and decoding rate-(s(K+1)/s(K+1)+1) TCMTR(j,k,t,a) codes, where s is the ECC symbol size in bits and K is the number of unencoded symbols that are interleaved with an (s+1)-bit encoded block at the output of a rate-s/(s+1) encoder that encodes the r-th s-bit symbol. K=m/s−1 where m=s(K+1) is the total number of bits to be encoded. Error propagation is reduced, thus allowing the ECC code to correct errors efficiently. Header error-rate is also reduced by eliminating occurrence of likely error events at the detector output. Although initially an RLL code may be designed for an ECC symbol size of s bits, the RLL encoding of the present invention may be used in conjunction with ECC schemes that utilize symbol sizes other than s bits.

REFERENCES:
patent: 5537424 (1996-07-01), Karabed et al.
patent: 5781133 (1998-07-01), Tsang
patent: 6223322 (2001-04-01), Michigami et al.
patent: 6995694 (2006-02-01), He et al.
patent: 7002492 (2006-02-01), Tsang et al.
patent: 2007/0205933 (2007-09-01), Coene et al.

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