| 摘要 |
A waveform equalizer comprises a preamplifier for amplifying the reproduced signal read out of a disk by means of an optical pick-up and the reproduced signal is converted into a digital signal by means of an A/D converter adapted to carrying out sampling operations with the data clock cycle. The reproduced signal waveform of the digital signal is subjected to a waveform equalizing process so as to minimize the mean square error relative to the amplitude of the target equalization waveform by means of linear operations. Additionally, the sample values of the reproduced signal waveform that is linearly equalized are nonlinearly equalized by neural network type operations.
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