发明授权
US06934233B2 Waveform equalizer for a reproduction signal obtained by reproducing marks and non-marks recorded on a recording medium
有权
用于通过再现记录在记录介质上的标记和非标记而获得的再现信号的波形均衡器
- 专利标题： Waveform equalizer for a reproduction signal obtained by reproducing marks and non-marks recorded on a recording medium
- 专利标题（中）： 用于通过再现记录在记录介质上的标记和非标记而获得的再现信号的波形均衡器
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申请号： US10626607申请日： 2003-07-25
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公开(公告)号： US06934233B2公开(公告)日： 2005-08-23
- 发明人: Harumitsu Miyashita , Shinichi Konishi , Atsushi Nakamura , Takeshi Nakajima , Junichi Minamino
- 申请人： Harumitsu Miyashita , Shinichi Konishi , Atsushi Nakamura , Takeshi Nakajima , Junichi Minamino
- 申请人地址： JP Osaka
- 专利权人： Matsushita Electric Industrial Co., Ltd.
- 当前专利权人： Matsushita Electric Industrial Co., Ltd.
- 当前专利权人地址： JP Osaka
- 代理机构： Greenblum & Bernstein, P.L.C.
- 优先权： JP2000-331973 20001031; JP2001-196034 20010628
- 主分类号： G11B7/00
- IPC分类号： G11B7/00 ; G11B7/005 ; G11B20/10
摘要：
A waveform equalizer for equalizing a waveform of a reproduction signal. A delay element delays a propagation of the reproduction signal. A plurality of multipliers multiply predetermined coefficients by the reproduction signal and the delayed propagation reproduction signal. A detector detects an asymmetry of the reproduction signal arising from physical profiles of each of the marks and the non-marks, and outputs a detection signal representing an amount of asymmetry. A discriminator outputs a discrimination signal in response to a discrimination of the marks and the non-marks. A calculator calculates a first coefficient multiplied by the reproduction signal of the marks based on the outputted detection signal, and calculates a second coefficient multiplied by the reproduction signal of the non-marks. A selector selects either the first or second coefficient, based upon the outputted discriminating signal.
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