Excavating
Patent
1993-11-12
1995-08-29
Gordon, Paul P.
Excavating
3647461, G06F 1110
Patent
active
054467454
ABSTRACT:
For error correction circuitry capable of correcting a maximum of 8 bytes for every 120 byte code word in an optical disk storage, a shortened Reed-Solomon (120,104) code over the Galois field GF(2.sup.8) is used. Cyclic Redundancy Check (CRC) and Reed-Solomon (RS) encoders generate CRC and RS code words to be supplied to the optical disk storage. A syndrome generator receives the RS code words unloaded from the storage and detects errors in unloaded data. A CRC decoder receives the CRC code words unloaded from the storage and checks parity errors. For coding and decoding, the components of the error correction circuitry utilize unary multipliers having a plurality of XOR gates for multiplying by a Galois field element .alpha..sup.i. In order to provide fewer signal paths in the unary multipliers, the Galois field is generated using the primitive element .beta..sup.106 for poly 15, the primitive element .beta..sup.127 for poly 6 and the primitive element .beta..sup.128 for poly 5.
REFERENCES:
patent: 4162480 (1979-07-01), Berlekamp
patent: 4847801 (1989-07-01), Tong
patent: 4852098 (1989-07-01), Brechard et al.
patent: 4866654 (1989-09-01), Yamada
patent: 4875211 (1989-10-01), Mural et al.
patent: 4918638 (1990-04-01), Matsumoto et al.
patent: 5046037 (1991-09-01), Cognault et al.
patent: 5068857 (1991-11-01), Yoshida
patent: 5136592 (1992-08-01), Weng
Garland Steven R.
Gordon Paul P.
Mitsubishi Semiconductor America Inc.
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