Invention Grant
- Patent Title: Digital partial response asymmetry compensation
- Patent Title (中): 数字部分响应不对称补偿
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Application No.: US10558059Application Date: 2004-05-15
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Publication No.: US09082455B2Publication Date: 2015-07-14
- Inventor: Qilong Feng , Marten Kabutz
- Applicant: Qilong Feng , Marten Kabutz
- Applicant Address: FR Issy-les-Moulineaux
- Assignee: Thomson Licensing
- Current Assignee: Thomson Licensing
- Current Assignee Address: FR Issy-les-Moulineaux
- Agency: Myers Wolin LLC
- Priority: EP03011891 20030527
- International Application: PCT/EP2004/005245 WO 20040515
- International Announcement: WO2004/107325 WO 20041209
- Main IPC: G11B7/00
- IPC: G11B7/00 ; G11B5/09 ; G11B20/10 ; G11B27/36 ; H04N5/76 ; G11B20/12

Abstract:
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.
Public/Granted literature
- US20070070865A1 Digital partial response asymmetry compensation Public/Granted day:2007-03-29
Information query
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