发明申请
- 专利标题: Apparatus, signal-processing circuit and device for magnetic recording system
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申请号: US12232435申请日: 2008-09-17
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公开(公告)号: US20090021852A1公开(公告)日: 2009-01-22
- 发明人: Hideki Sawaguchi , Yasutaka Nishida , Hisashi Takano , Hiroyuki Tsuchinaga
- 申请人: Hideki Sawaguchi , Yasutaka Nishida , Hisashi Takano , Hiroyuki Tsuchinaga
- 专利权人: Hitachi Global Storage Technologies Japan, Ltd.
- 当前专利权人: Hitachi Global Storage Technologies Japan, Ltd.
- 优先权: JP2000-328404 20001023
- 主分类号: G11B5/09
- IPC分类号: G11B5/09
摘要:
To effectively suppress a signal in a low frequency region in which the medium noise and the signal distortion are concentrated, and in order to effectively utilize a detected component of the reproduced signal in the low frequency region, a target of partial response equalization to the perpendicularly recorded/reproduced signal is set so that the low-frequency component around the direct current is suppressed to a regulated quantity for both the effective suppression and the effective utilization. Accordingly, a maximum-likelihood decoding process is carried out through the target of partial response equalization. Reliability of data detection is made higher and a signal-to-noise ratio is improved, so that the noise from the recording medium can be reduced more and it is possible to provide a high-density magnetic recording/reproducing apparatus.