Multi-level information recording apparatus, multi-level information recording method, multi-level information recording medium and multi-level information recording-reproducing apparatus
    9.
    发明授权
    Multi-level information recording apparatus, multi-level information recording method, multi-level information recording medium and multi-level information recording-reproducing apparatus 失效
    多级信息记录装置,多级信息记录方法,多级信息记录介质和多级信息记录再现装置

    公开(公告)号:US07126897B2

    公开(公告)日:2006-10-24

    申请号:US10386532

    申请日:2003-03-13

    IPC分类号: G11B5/09 G11B10/10

    摘要: A multi-level information recording-reproducing apparatus can accurately determine multi-level information even if recording density is increased. A multi-level information recording-reproducing apparatus radiates a laser beam to an information recording medium by switching a radiation energy level of the laser beam in a multi-level fashion and records a recorded mark in the information recording medium. The multi-level information recording-reproducing apparatus reproduces a multi-level data sequence recorded as a test pattern in the information recording medium, sets a reproduction signal level of a recorded mark based on an immediately-before cell located immediately before a cell to be reproduced, and corrects the radiation energy level of the laser beam so that the reproduction signal level can have a separate distribution from a distribution of another reproduction signal level.

    摘要翻译: 即使增加记录密度,多级信息记录 - 再现装置也可以准确地确定多级信息。 多级信息记录再现装置通过以多级方式切换激光束的辐射能量水平将激光束照射到信息记录介质,并将记录标记记录在信息记录介质中。 多级信息记录再现装置再现在信息记录介质中记录为测试图形的多级数据序列,基于紧邻单元格之前的紧邻单元格设置记录标记的再现信号电平 再现和校正激光束的辐射能量水平,使得再现信号电平可以具有与另一再现信号电平的分布分开的分布。