Method and apparatus for data reproduction

Details Method and apparatus for data reproduction Method and apparatus for data reproduction

2005-06-14

2005-06-14

Dildine, R. Stephen (Department: 2133)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Digital data error correction

C714S755000, C714S785000

Reexamination Certificate

active

06907559

ABSTRACT:
DVD data is read from an optical disc. Double buffering is used for outer error correction syndromes, the syndrome for one ECC frame being accumulated in one syndrome buffer, while error correction calculations for preceding data block are performed using a syndrome accumulated previously in another syndrome buffer). The syndrome buffers are used in alternating fashion as further blocks of data are received, while the flow of data to a main buffer is uninterrupted. This reduces buffering requirements in the decoder, and relaxes time constraints on the error correction calculations. A multi-beam implementation is disclosed, providing higher throughput.

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