发明授权
- 专利标题: Servo signal recording apparatus, information recording apparatus, and tracking servo method
- 专利标题(中): 伺服信号记录装置,信息记录装置和跟踪伺服方法
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申请号: US12476773申请日: 2009-06-02
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公开(公告)号: US08068308B2公开(公告)日: 2011-11-29
- 发明人: Masao Fujita , Shinji Kawakami , Toshio Kawakita , Sadamu Kuse
- 申请人: Masao Fujita , Shinji Kawakami , Toshio Kawakita , Sadamu Kuse
- 申请人地址: JP Ibaraki-Shi, Osaka
- 专利权人: Hitachi Maxell, Ltd.
- 当前专利权人: Hitachi Maxell, Ltd.
- 当前专利权人地址: JP Ibaraki-Shi, Osaka
- 代理机构: Birch, Stewart, Kolasch & Birch, LLP
- 优先权: JP2008-144774 20080602
- 主分类号: G11B5/584
- IPC分类号: G11B5/584 ; G11B21/02
摘要:
In the apparatus and method of the invention, a servo signal reproduction unit generates a PES from a servo signal reproduced from a magnetic tape, and a frequency conversion unit performs FFT processing of the PES to generate frequency component information. Then, a filter value generation unit generates filter values based on the frequency component information and writes these to a memory. When recording various data signals to the magnetic tape, the filter values are read from the memory and a control filter serving as a notch filter is incorporated into a feedback control for a tracking servo. This enables periodic and narrow-band noise to be removed from a PES, consequently reducing PESs. Accordingly, learning-type optimum notch filter control that allows a magnetic head to follow recording tracks at high speed and with high precision is possible even when the recording track width is reduced and the tape speed is increased.
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