发明授权
- 专利标题: Ternary code magnetic recording system
- 专利标题(中): 三代码磁记录系统
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申请号: US296512申请日: 1994-08-26
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公开(公告)号: US5621580A公开(公告)日: 1997-04-15
- 发明人: Joao R. Cruz , Daniel J. Krueger
- 申请人: Joao R. Cruz , Daniel J. Krueger
- 专利权人: Cruz; Joao R.,Krueger; Daniel J.
- 当前专利权人: Cruz; Joao R.,Krueger; Daniel J.
- 主分类号: G11B5/09
- IPC分类号: G11B5/09 ; G11B20/10 ; G11B20/14
摘要:
A digital magnetic recording system comprises an input for a binary-encoded data signal comprising two symbols. The binary signal is converted, using a binary-to-ternary convolutional encoder, to a ternary signal comprising three symbols. The ternary signal is recorded onto a magnetic medium wherein two symbols are recorded using conventional saturation recording and a third symbol is recorded using a nonoriented state. The nonoriented state results from the application to the medium of a high-frequency oscillating magnetic flux. The recorded signal is subsequently reproduced and equalized. A Viterbi algorithm is used to convert the equalized signal back to the original binary signal which is then output from the system.
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