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    • 8. 发明申请
    • Reproducing apparatus and tracking method
    • 再现设备和跟踪方法
    • US20050013588A1
    • 2005-01-20
    • US10890600
    • 2004-07-14
    • Toshiyuki Murayama
    • Toshiyuki Murayama
    • G11B15/467H04N5/7826H04N5/91
    • H04N5/78263
    • A reproducing apparatus comprises detecting means 18 and 19 for detecting levels of pilot signals recorded on tracks from reproduced signals reproduced by magnetic heads 1A, 1B, a calculating means 24 for calculating a ratio between levels detected by the detecting means 18 and 19 with respect to the pilot signals recorded on two tracks at both sides of the track traced by the magnetic heads 1A, 1B and a judging means 25 for judging an off-track amount of the magnetic head from the value of the ratio calculated by the calculating means 24, wherein tracking can be effected on the magnetic heads 1A, 1B in response to the off-track amount judged by the judging means 25. In a reproducing apparatus like a VCR (video cassette recorder) in which a magnetic head traces tracks on a tape-like recording medium, tracking can be effected on the magnetic head quickly in a short period of time.
    • 再现装置包括检测装置18和19,用于检测由磁头1A,1B再现的再现信号记录在磁道上的导频信号的电平;计算装置24,用于计算检测装置18和19相对于 记录在由磁头1A,1B跟踪的轨道的两侧的两个轨道上的导频信号和用于根据由计算装置24计算的比率的值来判断磁头的偏离磁道量的判断装置25, 其中可以响应于由判断装置25判断的偏离磁道数量对磁头1A,1B进行跟踪。在诸如磁头跟踪磁带上的VCR(录像机)的再现装置中, 可以在短时间内快速地对磁头进行跟踪。
    • 10. 发明授权
    • Optical disc recording method and optical disc recording apparatus
    • 光盘记录方法和光盘记录装置
    • US08391116B2
    • 2013-03-05
    • US13326948
    • 2011-12-15
    • Toshiyuki Murayama
    • Toshiyuki Murayama
    • G11B7/00
    • G11B7/1267G11B7/14
    • An optical disc recording method of determining a disc address when write and read operations are performed for an optical disc during recording power calibration in an optical disc recording apparatus having at least two optical head units including first and second optical head units is disclosed. The method includes: determining a first recording power calibration start address, which is an address at which the first optical head unit starts calibration of the recording power, from a power calibration area provided in advance as an area used to calibrate the recording power; and determining an address obtained by adding a range of the power calibration area used to calibrate the recording power to the first recording power calibration start address as a second recording power calibration start address, which is an address at which the second optical head unit starts calibration of the recording power.
    • 公开了一种在具有包括第一和第二光学头单元的至少两个光学头单元的光盘记录装置中记录功率校准期间为光盘执行写入和读取操作时确定盘地址的光盘记录方法。 该方法包括:从作为用于校准记录功率的区域预先提供的功率校准区域,确定作为第一光学头单元开始记录功率校准的地址的第一记录功率校准起始地址; 以及确定通过将用于校准记录功率的功率校准区域的范围添加到第一记录功率校准开始地址而获得的地址作为第二记录功率校准开始地址,其是第二光学头单元开始校准的地址 的记录功率。