发明授权
- 专利标题: Digital partial response asymmetry compensation
- 专利标题(中): 数字部分响应不对称补偿
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申请号: US10558059申请日: 2004-05-15
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公开(公告)号: US09082455B2公开(公告)日: 2015-07-14
- 发明人: Qilong Feng , Marten Kabutz
- 申请人: Qilong Feng , Marten Kabutz
- 申请人地址: FR Issy-les-Moulineaux
- 专利权人: Thomson Licensing
- 当前专利权人: Thomson Licensing
- 当前专利权人地址: FR Issy-les-Moulineaux
- 代理机构: Myers Wolin LLC
- 优先权: EP03011891 20030527
- 国际申请: PCT/EP2004/005245 WO 20040515
- 国际公布: WO2004/107325 WO 20041209
- 主分类号: G11B7/00
- IPC分类号: G11B7/00 ; G11B5/09 ; G11B20/10 ; G11B27/36 ; H04N5/76 ; G11B20/12
摘要:
A method is provided for receiving and restoring data from an optical recording medium exhibiting strong asymmetry in the regenerated RF signal. The method provides digital partial response asymmetry compensation of a digital RF signal. The asymmetry of the digital RF signal is detected through the measurement of the envelopes of a short T pulse (xT pulse) and a long T pulse (yT pulse), where the T is the bit clock of the recovered bit stream. Through the evaluation of the xT upper and lower envelopes and the asymmetry factor, upper and lower thresholds are determined. Only the asymmetric parts of the digital RF signal are selected and compensated.
公开/授权文献
- US20070070865A1 Digital partial response asymmetry compensation 公开/授权日:2007-03-29
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