US PATENT SUBCLASS 714 / 755
.~.~ Double encoding codes (e.g., product, concatenated)

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}
755.~.~ Double encoding codes (e.g., product, concatenated) {1}
756  DF  .~.~.~> Cross-interleave Reed-Solomon code (CIRC)

DEFINITION

Classification: 714/755

Double encoding codes (e.g., product, concatenated):

(under subclass 752) Subject matter including calculation and independent decoding of two independent sets of check words for enhancement of error correction.