Method and apparatus for decoding error correction code

Details Method and apparatus for decoding error correction code Method and apparatus for decoding error correction code

2006-11-21

2006-11-21

Chase, Shelly (Department: 2133)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Digital data error correction

Reexamination Certificate

active

07139961

ABSTRACT:
CIRC (cross interleave Reed-Solomon code) cods decoding includes for each input frame a one-symbol delay operation of every second data symbol and the inversion of parity symbols, C1 word decoding, de-interleaving, C2 word decoding, and a two-symbol delay operation before output. The error correction capabilities can be improved if the C1 word decoding, de-interleaving and C2 word decoding are carried out twice (double pass operation) before the two symbol delay operation and output. The invention allows double pass operation as well as single pass operation and uses a single memory with minimum capacity, wherein to three parts of the memory specific operations are assigned and wherein the memory is controlled in a special way.

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Yamauchi et al., A 24-X-Speed CIRC decoder for a CD-DSP/CD-ROM decoder LSI, Jun. 13, 1997, IEEE, p. 483-490.
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