Method and apparatus for recording digital signals medium for recording
digital signals and method
    8.
    发明授权
    Method and apparatus for recording digital signals medium for recording digital signals and method 失效
    用于记录用于记录数字信号的数字信号介质的方法和装置及方法

    公开(公告)号:US5848041A

    公开(公告)日:1998-12-08

    申请号:US870733

    申请日:1997-06-06

    摘要: An excellent waveform signal with less jitter is obtained as an output signal from a reproducing optical pickup, irrespective of a relative reading speed. Thus there is no need for an equalizing circuit on a reproducing apparatus side. An input bit sequence or a recording NRZI signal is combined with spatial frequency characteristics G(fs) by a G(fs) converter. An output signal from the G(fs) converter is combined with equalizing frequency characteristics EQ(fs) necessary on a reproducing side by an EQ(fs) converter. An output from the EQ(fs) converter is saturation-amplified by a saturation amplifier, thereby producing an ideally pre-jittered recording signal that has equivalent enhanced high-frequency component. The recording signal is recorded on an optical disk.

    摘要翻译: 作为来自再现光学拾取器的输出信号,获得具有较少抖动的优异波形信号,而与相对读取速度无关。 因此,在再现装置侧不需要均衡电路。 输入比特序列或记录NRZI信号通过G(fs)转换器与空间频率特性G(fs)组合。 来自G(fs)转换器的输出信号与EQ(fs)转换器在再现侧所需的均衡频率特性EQ(fs)相结合。 来自EQ(fs)转换器的输出由饱和放大器进行饱和放大,从而产生具有等效增强的高频分量的理想的预激励记录信号。 记录信号被记录在光盘上。

    Optical disk device and optical disk determination method
    9.
    发明申请
    Optical disk device and optical disk determination method 审中-公开
    光盘装置和光盘确定方法

    公开(公告)号:US20060198264A1

    公开(公告)日:2006-09-07

    申请号:US11342338

    申请日:2006-01-27

    IPC分类号: G11B7/095

    CPC分类号: G11B19/128 G11B2007/0006

    摘要: An optical disk device includes first pickup portion PU1 which outputs first detection signal by irradiating first laser beam having first wavelength to surface of optical disk and receiving its reflected light, second pickup portion PU2 having independent structure, which irradiates second laser beam having second wavelength and receives its reflected light so as to output second detection signal, and control portion in which with the first laser beam and the second laser beam so as to receive the first detection signal and the second detection signal, when system data of first class disk system area is detected from the first detection signal, the optical disk is determined to be the first class disk and when system data of second class disk system area is detected from the second detection signal, that optical disk is determined to be the second class.

    摘要翻译: 光盘装置包括第一拾取部分PU 1,其通过将具有第一波长的第一激光束照射到光盘表面并接收其反射光来输出第一检测信号,第二拾取部分PU 2具有独立结构,其照射具有第二激光束的第二激光束 波长并接收其反射光以输出第二检测信号,以及控制部分,其中与第一激光束和第二激光束接收第一检测信号和第二检测信号,当第一等级盘的系统数据 从第一检测信号检测系统区域,将光盘确定为第一类盘,并且当从第二检测信号检测到第二类盘系统区域的系统数据时,该光盘被确定为第二类。