Error detection/correction and fault detection/recovery – Pulse or data error handling – Digital data error correction
Reexamination Certificate
2006-10-24
2006-10-24
Dildine, R. Stephen (Department: 2133)
Error detection/correction and fault detection/recovery
Pulse or data error handling
Digital data error correction
Reexamination Certificate
active
07127665
ABSTRACT:
The present invention is to reduce the maximum magnetization reversal interval of a trellis code. A trellis diagram for the trellis code takes into consideration a constraint condition on the DSV of a code and an inter-symbol-interference for three bits. The minimum squared Euclidean distance is 4. When a non-interleaving encoder and a non-de-interleaving code detector are constructed using the trellis diagram, the maximum magnetization reversal interval of a trellis code to be used is reduced to half of that in a known case while having the error rate and circuit size approximately equal to those in the known case. The trellis diagram has a basic repeating unit for two bits. In the actual apparatus, the trellis diagram is repeatedly used. The present invention is applicable to a read/write apparatus.
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Dildine R. Stephen
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Sony Corporation
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