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    • 3. 发明授权
    • Data modulation method, modulator, recording method, and recording apparatus
    • 数据调制方法,调制器,记录方法和记录装置
    • US08495461B2
    • 2013-07-23
    • US12678682
    • 2008-09-11
    • Jun Lee
    • Jun Lee
    • H03M13/00
    • G11B20/1426G11B7/0045G11B20/10055G11B20/1833G11B2020/185
    • A data modulation method and a data error correction method are provided. The data modulation method includes generating a channel sequence for an input sequence, determining whether or not the channel sequence violates a Run Length Limit (RLL) constraint, and performing, when the channel sequence violates the RLL constraint, bit flip at a position prior to a position at which the RLL constraint is violated among positions of bits included in the channel sequence. The data error correction method includes detecting an error bit of received data using a parity check matrix, determining whether or not the error bit is an error caused by bit flip, and correcting the error bit when the error bit is an error caused by bit flip for applying an RLL constraint.
    • 提供了数据调制方法和数据纠错方法。 数据调制方法包括产生用于输入序列的信道序列,确定信道序列是否违反运行长度限制(RLL)约束,并且当信道序列违反RLL限制时,执行比特翻转 在通道序列中包含的位的位置之间违反RLL约束的位置。 数据纠错方法包括使用奇偶校验矩阵检测接收到的数据的错误位,确定错误位是否是由位翻转引起的错误,以及当错误位是由位翻转引起的错误时校正错误位 用于应用RLL约束。
    • 10. 发明申请
    • Information reproducing apparatus
    • 信息重放装置
    • US20070121232A1
    • 2007-05-31
    • US11606030
    • 2006-11-30
    • Takao SugawaraJun Lee
    • Takao SugawaraJun Lee
    • G11B20/10
    • G11B20/10009G11B20/10333
    • An information reproducing apparatus which reproduces information recorded on a medium includes an asymmetry correction circuit configured to correct an asymmetry of a signal read from a medium. The apparatus also includes a first high pass filter installed before the asymmetry correction circuit and configured to remove noise in the signal by a first cut-off frequency. The apparatus also includes a second high pass filter installed after the asymmetry correction circuit and configured to remove the noise in the signal by a second cut-off frequency, wherein the second cut-off frequency is higher than the first cut-off frequency.
    • 再现记录在介质上的信息的信息再现装置包括:非对称校正电路,被配置为校正从介质读取的信号的不对称性。 该装置还包括安装在不对称校正电路之前的第一高通滤波器,并且被配置为通过第一截止频率去除信号中的噪声。 该装置还包括安装在不对称校正电路之后的第二高通滤波器,并且被配置为通过第二截止频率去除信号中的噪声,其中第二截止频率高于第一截止频率。