Error detection/correction and fault detection/recovery – Pulse or data error handling – Digital data error correction
Reexamination Certificate
2007-06-19
2007-06-19
Baker, Stephen M. (Department: 2133)
Error detection/correction and fault detection/recovery
Pulse or data error handling
Digital data error correction
C341S059000, C714S769000, C714S780000, C714S792000
Reexamination Certificate
active
10125153
ABSTRACT:
At the preceding stage of a first one of two APP decoders that constitute a turbo decoder, there is provided a logarithmic-likelihood computing circuit that creates and outputs logarithmic likelihoods L(y′i|yi) of a reproduced signal y′iwhich is soft information. The first APP decoder has an APP decoding function of receiving logarithmic likelihoods L(y′i|yi) of the reproduced signal yias well as a priori information as to code data c′i, updating the code data c′iand producing outputs of a posteriori probabilities according to trellis diagram information that satisfy constraints concerning an RLL modulation. Turbo decoding becomes compatible with the RLL demodulation, and a turbo decoding with high error-correcting capability is usable in reproducing channel data airecorded onto a recording medium, which allows a recording density of the recording medium to be increased.
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Baker Stephen M.
Edwards Angell Palmer & & Dodge LLP
Tucker David A.
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