| 摘要 |
PURPOSE:To reduce the number of A/D converters and to decrease a circuit scale by sharing the A/D converter for inputting and converting a signal and the A/D converter for the time of a signal reproduction. CONSTITUTION:At the time of recording, a signal to be inputted from an input signal 1 is inputted to the A/D converter 3 through a switch 2 and the converted input signal is converted into the signal suitable for being recorded by a signal processing part 5 through the switch 4. Then, after it is error-corrected and coded by an error correcting coding part 6, it is outputted to a recording signal 7. Next, at the time of reproduction, the reproducing signal 8 obtained from a recording medium is inputted to the A/D converter 3 through the switch 2 and the converted reproducing signal is inputted to a signal detecting part 10 through the switch 4. The detecting part 10 detects the signal by using digital multilevel information obtained by the A/D converter 3. The detected signal is error-corrected by an error correcting part 11 and converted into the former state of the signal by a signal processing part 12 and outputted to the output signal 13.
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