发明名称 |
Digital signal magnetic recording/reproducing apparatus |
摘要 |
A digital signal magnetic recording/reproducing apparatus converts a digital signal into a multi-value quadrature amplitude modulated signal, and records and reproduces the multi-value quadrature amplitude modulated signal. By using the multi-value quadrture amplitude modulation, any DC component in the recording signal is removed and utilization efficiency of the recording frequency band can be improved. By bias recording of the multi-value quadrature amplitude modulated signal, non-linearity of the electromagnetic of conversion system is reduced, and deterioration of SN ratio due to distortion is improved.
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申请公布号 |
US4979052(A) |
申请公布日期 |
1990.12.18 |
申请号 |
US19880251094 |
申请日期 |
1988.09.29 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
MATSUTA, TOYOHIKO;SHIMOTASHIRO, MASAFUMI;KOBAYASHI, MASAAKI |
分类号 |
G11B5/09;G11B20/10 |
主分类号 |
G11B5/09 |
代理机构 |
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代理人 |
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