| 摘要 |
A transmission system, which includes a recorder/reproducer with at least one frequency incapable of producing an output other than a direct current component and which transmits information in a frequency higher than the frequency incapable of producing an output, has an information recording and reproducing apparatus wherein a transformation circuit transforms a first data sequence including the information into a second data sequence, in accordance with frequency characteristics of the transformation circuit, which second data sequence can then be transmitted, and wherein a restoring circuit restores the first data sequence from a third data sequence obtained after transmission.
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