发明授权
US5844741A System for reproducing high-density magnetic record data with viterbi
detector for generating quadripartite reproduction data
失效
用于产生四方再生数据的维特比检测器再现高密度磁记录数据的系统
- 专利标题： System for reproducing high-density magnetic record data with viterbi detector for generating quadripartite reproduction data
- 专利标题（中）： 用于产生四方再生数据的维特比检测器再现高密度磁记录数据的系统
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申请号： US548956申请日： 1995-10-27
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公开(公告)号： US5844741A公开(公告)日： 1998-12-01
- 发明人: Hideyuki Yamakawa , Takushi Nishiya , Takashi Nara , Terumi Takashi
- 申请人： Hideyuki Yamakawa , Takushi Nishiya , Takashi Nara , Terumi Takashi
- 申请人地址： JPX Tokyo
- 专利权人： Hitachi, Ltd.
- 当前专利权人： Hitachi, Ltd.
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX6-263435 19941027; JPX7-074063 19950330; JPX7-202377 19950808
- 主分类号： G11B20/14
- IPC分类号： G11B20/14 ; G11B5/012 ; G11B5/09 ; G11B20/10 ; G11B20/18 ; H03M13/23 ; H04L25/08 ; H04L25/497 ; G11B5/035
摘要：
A system for reproducing data recorded on a magnetic recording medium at high density is provided as a simple configuration. Quadripartite reproduction data is output from a Viterbi detection circuit to an adder, which then subtracts the quadripartite reproduction data from a signal before PR4-ML method data determination. An adder is used to perform a (1+D) process for the result. An error signal pattern detection circuit performs maximum likelihood estimation for an PR4-ML method detection error. Further, when a detected determination error matches an actual reproduction data string, a data correction circuit corrects the reproduction data string.
公开/授权文献
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