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    • 10. 发明专利
    • Optical disk device
    • 光盘设备
    • JP2011048890A
    • 2011-03-10
    • JP2009198525
    • 2009-08-28
    • Renesas Electronics Corpルネサスエレクトロニクス株式会社
    • ASHIZAWA TETSUOHONMA HIROMI
    • G11B7/005G11B20/10G11B20/14
    • G11B20/10333G11B20/10046G11B20/10212G11B20/10425G11B2020/1287G11B2220/2537
    • PROBLEM TO BE SOLVED: To reduce the occurrence of an error caused by an influence of LPP when information recorded on an optical disk of DVD-R/RW is reproduced. SOLUTION: An LPP detector 114 detects LPP in a wobble signal. A corrector 140 performs a process of calculating a difference in signal level between a synchronous pattern portion with LPP and a synchronous pattern portion without LPP, which have the same polarity, to obtain a set of differences, and uses the difference set to correct an RF signal of timing at which LPP is detected. The synchronous pattern portion with LPP is synchronous pattern portion which is obtained when LPP is detected at timing of the synchronous pattern portion located at a head of a sync frame of the RF signal. The synchronous pattern portion without LPP is a synchronous pattern portion which is obtained when LPP is not detected at timing of the synchronous pattern portion of the sync frame. COPYRIGHT: (C)2011,JPO&INPIT
    • 要解决的问题:当再现记录在DVD-R / RW的光盘上的信息时,减少由LPP的影响引起的错误的发生。 解决方案:LPP检测器114检测摆动信号中的LPP。 校正器140执行计算具有LPP的同步模式部分和没有LPP的同步模式部分之间的信号电平差异的处理,以获得一组差异,并且使用差分集来校正RF 检测LPP的定时信号。 具有LPP的同步模式部分是在位于RF信号的同步帧的头部的同步模式部分的定时检测到LPP时获得的同步模式部分。 没有LPP的同步模式部分是在同步帧的同步模式部分的定时未检测到LPP时获得的同步模式部分。 版权所有(C)2011,JPO&INPIT