Lookup-based Galois field operations
US8200734B1 · kind B1 · utility
2Cited by
4References
14Claims
0Family size
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Inventor
Key dates
| Filing date | Feb 7, 2008 |
| Grant date | Jun 12, 2012 |
| Priority date | — |
| Expiry date | Feb 28, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F7/724
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Computing the Q and the P syndromes, which is needed in RAID 6 systems is effected through use of a single ROM lookup table for the necessary finite field multiplication. In one embodiment, the P and Q syndromes for data that normally arrives with 8-bit words are created by using Galois Field GF(24) arithmetic rather than the conventional GF(28) arithmetic, thereby very significantly reducing the requires size of the lookup table.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.