Information reproducing device

Details Information reproducing device Information reproducing device

2007-01-26

2011-11-15

Bibbins, Latanya (Department: 2627)

Dynamic information storage or retrieval

Binary pulse train information signal

Including sampling or a/d converting

C369S059210, C369S059170

Reexamination Certificate

active

08059510

ABSTRACT:
In an information reproducing device for performing maximum likelihood decoding using asynchronous sample data, data from the recording medium101is sampled by an A/D converter103at an asynchronous sampling clock generated by a clock generator104, to obtain asynchronous sample data. A timing detector106detects a phase θ of the asynchronous sampling clock, where recording timings of data of the recording medium101are reference points. A reference value generator108generates reference values used in a Viterbi decoder107, based on basic phase reference values at a phase of 0 and a phase signal θ of the asynchronous sampling clock. A basic reference value learner109learns and modifies the phase-0 basic reference values based on the phase signal θ, the asynchronous sample data, and the reference values.

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