Encoder and decoder

Details Encoder and decoder Encoder and decoder

2007-07-24

2007-07-24

Williams, Howard (Department: 2819)

Coded data generation or conversion

Digital code to digital code converters

To or from minimum d.c. level codes

C341S059000, C369S059210

Reexamination Certificate

active

11377124

ABSTRACT:
An encoded-bit-string generating unit generates a bit string encoded by scrambling an input bit string. A direct-current-component evaluating unit selects a bit string having a predetermined width in the bit string generated by the encoded-bit-string generating unit, while shifting bits one by one, and evaluates the direct-current component in the selected bit string. A bit-string extracting unit extracts a bit string with suppressed direct-current component, based on a result of an evaluation by the direct-current-component evaluating unit.

REFERENCES:
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patent: 6853320 (2005-02-01), Hayami et al.
patent: 7006016 (2006-02-01), Feng
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patent: WO 03/007300 (2003-01-01), None
Kees A. Schouhamer Immink; “Codes for Mass Data Storage Systems”; Shannon Foundation Publishers, Nov. 2004; pp. 185-278.
Ivan J. Fair et al.; Guided Scrambling: A New Line Coding Technique for High Bit Rate Fiber Optic Transmission Systems; IEEE Trans. on Comm., vol. 39, No. 2, Feb. 1991; pp. 289-291.
Zhai et al; “Performance Evaluation of DC-Free Error-Control Block Codes”; Communications Systems, 2004; ICCS 2004; The 9thInt'l. Conference on Singapore, China; Sep. 6-8, 2004; Piscataway, NJ, IEEE, Sep. 6, 2004, pp. 451-455.
Xin et al.; “Low-Frequency Performance of Guided Scrambling DC-Free Codes”; IEEE Communications Letters, IEEE Service Center, Piscataway, NJ, vol. 9, No. 6; Jun. 2005, pp. 537-539.
Immink et al.; “Codes for Digital Recorders”; IEEE Trans. on Information Theory, vol. 44, No. 6; Oct. 1998; pp. 2260-2299.

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