| 摘要 |
This invention provides a demodulation method and a demodulator for demodulating by converting analog signal obtained by reading information stored in a recording medium to digital signal so as to generate data representing that information. Consequently, correct data is obtained from signal having low S/N ratio. Over-sampling is carried out by an A/D converter 103A and a digital signal synchronous with a proper clock is reproduced by interpolation computation, maximum likelihood is detected and RLL decoded. Then, error is corrected by an error correction code.
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