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    • 8. 发明授权
    • Offset loop for wobble
    • 偏移回路用于摆动
    • US08102740B1
    • 2012-01-24
    • US12896358
    • 2010-10-01
    • Mats ObergJingfeng Liu
    • Mats ObergJingfeng Liu
    • G11B20/10
    • G11B20/1403G11B7/0053G11B7/094G11B20/1217G11B2020/1239G11B2020/1274G11B2020/1287G11B2220/2537
    • An automated capability is provided in which an offset correction is automatically determined and routinely updated in order to reduce or otherwise eliminate data retrieval errors that may be caused by low level distortion in optical disc data storage recording, re-recording and retrieval system. The capability is implemented through an improved offset control loop for reading information from a modulated wobble signal with which the data is recorded to an optical disc data storage medium to provide detection of an offset and correction of that offset to facilitate implementation of precise timing synchronization and/or encoded information contact in the system. The offset detector measures a wobble signal and mathematically converts detected information regarding the measured wobble signal to an offset correction by integrating the wobble signal over a specific time interval and comparing the integrated value to an expected integrated value. The integration may be performed over at least one period of the sinusoidal wobble signal, and the correction added to the wobble signal.
    • 提供了一种自动化能力,其中自动确定和定期更新偏移校正,以便减少或以其他方式消除可能由光盘数据存储记录,重新记录和检索系统中的低电平失真引起的数据检索错误。 该能力通过改进的偏移控制环路实现,用于从调制的摆动信号读取信息,将数据记录到调制摆动信号到光盘数据存储介质,以提供偏移的检测和该偏移的校正,以便于实现精确的定时同步, /或编码信息联系在系统中。 偏移检测器测量摆动信号,并通过在特定时间间隔上积分摆动信号并将积分值与预期积分值进行比较,将关于测量的摆动信号的检测信息数学转换为偏移校正。 可以在正弦摆动信号的至少一个周期上执行积分,并且将校正添加到摆动信号。