发明公开
- 专利标题： Magnetic card reader and reproduction and demodulation method
- 专利标题（中）： 磁卡阅读器和再现解调方法
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申请号： EP05016110.8申请日： 2001-01-23
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公开(公告)号： EP1615157A2公开(公告)日： 2006-01-11
- 发明人: Yokozawa, Mitsuo , Nakamura, Hiroshi , Morozumi, Shinya , Hoson, Keiji
- 申请人： KABUSHIKI KAISHA SANKYO SEIKI SEISAKUSHO
- 申请人地址： 5329, Shimosuwa-machi Suwa-gun Nagano JP
- 专利权人： KABUSHIKI KAISHA SANKYO SEIKI SEISAKUSHO
- 当前专利权人： KABUSHIKI KAISHA SANKYO SEIKI SEISAKUSHO
- 当前专利权人地址： 5329, Shimosuwa-machi Suwa-gun Nagano JP
- 代理机构： Grünecker, Kinkeldey, Stockmair & Schwanhäusser Anwaltssozietät
- 优先权： JP2000015010 20000124; JP2000179431 20000615; JP2000324439 20001024; JP2000338901 20001107
- 主分类号： G06K7/08
- IPC分类号： G06K7/08 ; G11B5/02 ; G11B5/09 ; G11B20/00 ; G11B20/10 ; G11B20/14
摘要：
A data demodulation method of magnetic record data for demodulating magnetic data information made of "0" signal or "1" signal based on interval data provided by detecting a peak position in a reproduction signal of magnetic record data written to a magnetic record medium and counting the time interval between the adjacent peak positions, said data demodulation method comprising the steps of:
classifying all interval data concerning the peak positions of the reproduction signal into three categories of "0" data, "1" data, and "gray zone" data undefined as the "0" data or the "1" data;
performing smoothing processing for the categories of the "0" data and the "1" data, thereby finding two smoothed curves;
averaging the two smoothed curves, thereby finding and setting a threshold curve for classifying data into the "0" data and the "1" data; and
making binarization determination of all the interval data using the setup threshold curve.
classifying all interval data concerning the peak positions of the reproduction signal into three categories of "0" data, "1" data, and "gray zone" data undefined as the "0" data or the "1" data;
performing smoothing processing for the categories of the "0" data and the "1" data, thereby finding two smoothed curves;
averaging the two smoothed curves, thereby finding and setting a threshold curve for classifying data into the "0" data and the "1" data; and
making binarization determination of all the interval data using the setup threshold curve.
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