US PATENT SUBCLASS 714 / 782
.~.~.~ Bose-Chaudhuri-Hocquenghem code

Current as of: June, 1999
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714 /   HD   ERROR DETECTION/CORRECTION AND FAULT DETECTION/RECOVERY

746  DF  DIGITAL DATA ERROR CORRECTION {5}
752  DF  .~ Forward correction by block code {18}
781  DF  .~.~ Code based on generator polynomial {4}
782.~.~.~ Bose-Chaudhuri-Hocquenghem code

DEFINITION

Classification: 714/782

Bose-Chaudhuri-Hocquenghem code:

(under subclass 781) Subject matter where the block code is a t error correcting code which is the set of all polynomials [a(c)] over the Galois field GF( 2m) of degree n-1 or less, such that a(ai)=0, for i=1,3,5,..., 2t-1 where a is a primitive element of the finite field GF( 2m), and where c is the radix 2 for binary data, a(c)=a0+a1c+a2c2+...+an-1cn - 1, and aj=0,1 (j=0,1,2,..., n-1 ).