Coded data generation or conversion – Digital code to digital code converters – To or from run length limited codes
Reexamination Certificate
2006-07-04
2006-07-04
Williams, Howard L. (Department: 2819)
Coded data generation or conversion
Digital code to digital code converters
To or from run length limited codes
C341S080000, C360S040000, C369S059230
Reexamination Certificate
active
07071851
ABSTRACT:
Non-uniform modulation encoding techniques are provided to prevent data from containing bit patterns that are prone to errors during read back. Modulation encoding is performed on a data stream to remove error prone bit patterns. Unconstrained data, such as error check parity, that is inserted into the modulated data stream may contain error prone bit patterns. Stricter modulation constraints are enforced on bits that are next to the unconstrained data, than on the remaining bits. By enforcing stricter modulation constraints on these bits, an entire data bit stream can have a desired modulation constraint.
REFERENCES:
patent: 4707681 (1987-11-01), Eggenberger et al.
patent: 4818969 (1989-04-01), Krakauer et al.
patent: 5241309 (1993-08-01), Cideciyan et al.
patent: 5311521 (1994-05-01), Fitingof et al.
patent: 5604497 (1997-02-01), Sonntag
patent: 5757294 (1998-05-01), Fisher et al.
patent: 5757822 (1998-05-01), Fisher et al.
patent: 5760718 (1998-06-01), Schouhamer Immink
patent: 6018304 (2000-01-01), Bessios
patent: 6052072 (2000-04-01), Tsang et al.
patent: 6072410 (2000-06-01), Kim
patent: 6081210 (2000-06-01), Nikolic et al.
patent: 6236340 (2001-05-01), Patapoutian et al.
patent: 6417788 (2002-07-01), McEwen et al.
patent: 6476737 (2002-11-01), Caroselli et al.
patent: 6557124 (2003-04-01), Cideciyan et al.
de Souza, et al.; Constrained Systems With Unconstrained Positions; Apr. 2002; IEEE Transactions on Information Theory, vol. 48, No. 4, pp. 866-879.
Blaum; Combining ECC with Modulation: Performance Comparisons, May 1991, IEEE Transactions on Information Theory, vol. 37, No. 3, pp. 945-949.
Kobayashi, H.; A Survey of Coding Schemes for Tranmission or Recording of Digital Data; Dec. 1971, IEEE Transactions on Communication Technology, vol. COM-19, No. 6 pp. 1087-1100.
J.D. Coker et al., “Implementation of PRML in a rigid disk drive”, IEEE Transactions on Magnetics, vol. 27, No. 6, Nov. 1991.
Roy D. Cideciyan et al., “A PRML system for digital magnetic recording”, IEEE Journal on Selected Areas in Communication, vol. 10, No. 1, Jan. 1992.
E. Eleftheriou et al., “Noise-predictive maximum-likelihood (NPML) detection for the magnetic recording channel”, IEEE 1996, no month given.
Jonathan D. Coker et al., “Noise-Predictive Maximum Likelihood (NPML) Detection”, IEEE Transactions on Magnetics, vol. 34, No. 1, Jan. 1998.
Jaekyun Moon et al., “Maximum Transition Run Codes for Data Storage Systems”, IEEE Transactions on Magnetics, vol. 32, No. 5, Sep. 1996.
Roy D. Cideciyan et al., “Maximum Transition Run Codes for Generalized Partial Response Channels”, IEEE Journal of Selected Areas in Communications, vol. 19, No. 4, Apr. 2001.
Kees A. Schouhamer Immink et al., “Codes for Digital Recorders”, IEEE Transactions on Information Theory, vol. 44, No. 6, Oct. 1998.
“Circuitry for Performing Error Correction Calculations on Baseband Encoded Data to Eliminate Error Propagation”, IBM Technical Disclosure Bulletin, Mar. 1981, Author unknown.
M. Mansuripur, “Enumerative Modulation Coding with Arbitrary Constraits and Post-Modulation Error Correction Coding for Data Storage Systems”, SPIE vol. 1499 Optical Data Storage, 1991, no month given.
Adriaan J. van Wijngaarden et al., “Efficient Error Control Schemes for Modulation and Synchronization Codes”, IEEE Aug. 1998.
Adriaan J. van Wijngaarden et al., “Maximum Runlength-Limited Codes with Error Control Capabilities”, IEEE Journal on Selected Areas in Communications, vol. 19, No. 4, Apr. 2001.
William H. Kautz, “Fibonacci Codes for Synchronization Control”, IEEE Transactions on Information Theory, Apr. 1965.
Kees A. Schouhamer Immink, “A Practical Method for Approaching the Channel Capacity of Constrained Channels”, IEEE Transactions on Information Theory, vol. 43, No. 5, Sep. 1997.
Thomas M. Cover, “Enumerative Source Encoding”, IEEE Transactions on Information Theory, vol. IT-19, No. 1, Jan. 1973.
Jorge Campello de Souza et al., “Constrained Systems with Unconstrained Positions”, IEEE Transactions on Information Theory, vol. 48, No. 4, Apr. 2002.
D.T. Tang et al., “Block Codes for a Class of Constrained Noiseless Channels”, Information and Control 17, 1970, no month given.
Blaum Mario
Cideciyan Roy D.
Eleftheriou Evangelos S.
Galbraith Richard Leo
Lakovic Ksenija
Hitachi Global Storage Technologies - Netherlands B.V.
Townsend and Townsend / and Crew LLP
Williams Howard L.
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