PRML code encoding and decoding methods for high-density data st

Details PRML code encoding and decoding methods for high-density data st PRML code encoding and decoding methods for high-density data st

1998-05-20

2000-10-03

Tokar, Michael

Coded data generation or conversion

Digital code to digital code converters

Byte length changed

341 59, 341 81, H03M 700

Patent

active

061279544

ABSTRACT:
An encoding and decoding method compressing and error-correction encoding an input 8-bit data to immunize the input data to noise and other signal distortion causing factors. The error-corrected data is encoded to 9-bit codewords modulated to be suitable for the channel characteristics of the storing device. A signal is generated for the input 8-bit data encoded to modulation codes, then pre-compensated and recorded. The generated signal is processed to be easily detected by reproducing the 9-bit codewords. The processed signal is detected to minimize an error rate. The detected signal is decoded according to channel characteristics, and recovered to the input 8-bit user data through error correction and compression decoding.

REFERENCES:
patent: 4707681 (1987-11-01), Eggenberger et al.
patent: 4786890 (1988-11-01), Marcus et al.
patent: 5260703 (1993-11-01), Nguyen et al.
IBM Technical Disclosure Bulletin, vol. 32, No. 5B, Oct. 1989, pp. 1-3, XP002104797.
P. Horowitz and W. Hill, "The Art of Electronics", Cambridge University Press, 1980, p. 333, XP002104798.
P.H. Siegel and J.K. Wolf, Modulation and Coding for Information Storage, IEEE Communications Magazine, vol. 29, No. 12, Dec. 1991, pp. 68-86, XP000287983.

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