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(4, 20) runlength limited modulation code for high density storage system

(4, 20) runlength limited modulation code for high density storage system

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An RLL (run length limited) modulation code having a limited amount of error propagation and high density ratio is attractive for use in a high density storage system. The authors present a fixed-length (4, 20) RLL code with code rate m/n = 4/11. The code design is based on the look-ahead coding method.

Inspec keywords: magnetic tape storage; magnetic disc storage; runlength codes; optical disc storage

Other keywords: look-ahead coding method; code design; RLL; high density storage system; code rate; fixed-length code; (4, 20) runlength limited modulation code; density ratio; error propagation

Subjects: Optical storage and retrieval; Optical storage; Storage on moving magnetic media; Magnetic recording; Codes

References

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      • C.D. Mee , E.D. Daniel . (1988) Magnetic recording. Vol. II.
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      • R.L. Alder , D. Coppersmith , M. Hassner . Algorithms for sliding block codes: An application of symbolic dynamicto information theory. IEEE Trans. , 5 - 22
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      • G.V. Jacoby , R. Kost . Binary two-third rate code with full word look-ahead. IEEE Trans. , 5 , 709 - 714
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      • M. Blaum . Combining ECC with modulation: Performance comparisons. IEEE Trans. , 3 , 945 - 949
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      • P.A. Franaszek . Construction of bounded delay codes for discrete noiseless channels. IBM J. Res. Develop. , 506 - 514
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