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11. 发明公开

EP1912213A3 Optical disc apparatus 有权
标题翻译：光盘装置
公开(公告)号：EP1912213A3
公开(公告)日：2008-09-03
申请号：EP07019947.6
申请日：2007-10-11
申请人： Funai Electric Co., Ltd.
发明人： Nakagawa, Ryotaro , Sogawa, Teruaki , Takahashi, Masanori
IPC分类号： G11B7/09 , G11B7/005
CPC分类号： G11B7/0945 , G11B7/0053 , G11B7/0908
摘要： An optical disc apparatus comprises, an optical pickup, a signal extracting unit for reading address information and an RF signal from an optical disc based on signal read by the optical pickup, and a main controller for performing jitter control and focus control. At an initial reading of the optical disc, the main controller determines whether an address information detector succeeds in reading the address information. If not successful (NO in S3), the main controller offsets a defocus position to two points in plus and minus directions from a defocus position giving best jitter (S7), calculates an approximate curve of signal level characteristics with a peak value (S8), and adjusts and allows the defocus value to correspond to this peak value (S9). If the optical disc apparatus cannot read address information, depending on the defocus value, it increases the signal level of the address information by the defocus position adjustment.
摘要翻译：一种光盘设备包括：光学拾取器;信号提取单元，用于基于由光学拾取器读取的信号从光盘读取地址信息和RF信号;以及主控制器，用于执行抖动控制和聚焦控制。在初始读取光盘时，主控制器确定地址信息检测器是否成功读取地址信息。如果不成功（S3中为“否”），主控制器将离焦位置从离焦位置的正负两个方向偏移到两个点，从而产生最佳抖动（S7），计算具有峰值的信号电平特性近似曲线（S8），并调整并允许散焦值对应于该峰值（S9）。如果光盘装置不能读取地址信息，则根据散焦值，通过散焦位置调整增加地址信息的信号电平。

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