发明名称 |
Data conversion method, pilot signal formation method using the same and rotary magnetic head device using the same. |
摘要 |
A data conversion method from m bits of data words into n bits of code words in recording or transmission, in which n is larger than m. A number of bit "0" arranged between one bit "1" and a next bit "1" is restricted to at most 4 in a code string of each code word, and a pair of groups of the n bits of code words corresponding to CDSs (code word digital sum) of two codes +1 and -1 are allowed to correspond to the m bits of data words. One of the two codes +1 and -1 is selectively used according to a DSV (digital sum variation) control signal to convert the m bits of data word into the n bits of code word. A pilot signal formation method using the data conversion method for obtaining a tracking error signal in a magnetic recording and reproducing apparatus, and a rotary magnetic head device for use in a magnetic recording and reproducing apparatus are also disclosed. <IMAGE>
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申请公布号 |
EP0472375(A2) |
申请公布日期 |
1992.02.26 |
申请号 |
EP19910307579 |
申请日期 |
1991.08.16 |
申请人 |
MITSUBISHI DENKI KABUSHIKI KAISHA |
发明人 |
IDO, KIHEI;OHTA, MASAYUKI |
分类号 |
G06F13/40;G11B5/008;G11B5/588;G11B5/592;G11B15/46;G11B15/467;G11B15/473;G11B20/14 |
主分类号 |
G06F13/40 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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