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    Tracking control system using single frequency pilot signal
    7.
    发明授权
    Tracking control system using single frequency pilot signal 失效
    跟踪控制系统采用单频导频信号

    公开(公告)号：US5229891A

    公开(公告)日：1993-07-20

    申请号：US831632

    申请日：1992-02-07

    申请人： Katsuji Yoshimura ,  Koji Takahashi ,  Kenichi Nagasawa ,  Shinichi Yamashita ,  Motokazu Kashida ,  Mitsuhiro Otokawa

    发明人： Katsuji Yoshimura ,  Koji Takahashi ,  Kenichi Nagasawa ,  Shinichi Yamashita ,  Motokazu Kashida ,  Mitsuhiro Otokawa

    IPC分类号： G11B15/467 ,  G11B21/10

    CPC分类号： G11B21/103 ,  G11B15/4678

    摘要： In an apparatus for recording an information signal on a recording medium forming many parallel tracks on the medium and for reproducing the information signal from the medium, a tracking control system is arranged to record a pilot signal of a given frequency along with the information signal in the first of the many tracks; to have the pilot signal also recorded in second and third tracks adjoining the first track on both sides thereof but at pilot signal phases shifted from the pilot signal phase of the first track to equal degrees in the directions opposite to each other at parts of the second and third tracks aligned perpendicularly to the longitudinal direction of the first track; and, in reproducing the information signal, the position of the recording medium and that of a reproducing head relative to each other are controlled on the basis of the pilot signal of the given frequency reproduced by the reproducing head from the first track along with the information signal.

    摘要翻译： 在用于在介质上形成许多并行轨道的记录介质上记录信息信号并用于从介质再现信息信号的设备中，跟踪控制系统被布置成将信号信号与信息信号一起记录在一起 第一个很多轨道; 使得导频信号也记录在与其两侧相邻的第一磁道的第二和第三磁道中，但是在第二磁道的一部分处的导频信号相位从第一磁道的导频信号相位相移到相等的方向 和第三轨道，其垂直于第一轨道的纵向排列; 并且在再现信息信号时，基于由再现头从第一轨道再现的给定频率的导频信号与信息一起来控制记录介质和再现头相对于彼此的位置 信号。

    Color video signal reproducing apparatus using frequency converted chrominance signal
    10.
    发明授权
    Color video signal reproducing apparatus using frequency converted chrominance signal 失效
    使用频率转换色度信号的彩色视频信号再现装置

    公开(公告)号：US4882632A

    公开(公告)日：1989-11-21

    申请号：US111361

    申请日：1987-10-21

    申请人： Hiroto Yasumura ,  Masahide Hirasawa ,  Minoru Noji ,  Susumu Kozuki ,  Koji Takahashi ,  Katsuji Yoshimura

    发明人： Hiroto Yasumura ,  Masahide Hirasawa ,  Minoru Noji ,  Susumu Kozuki ,  Koji Takahashi ,  Katsuji Yoshimura

    IPC分类号： H04N9/83 ,  H04N9/87

    CPC分类号： H04N9/87 ,  H04N9/83

    摘要： The present invention is directed to a reproducing apparatus for reproducing a composite signal from a record bearing medium on which said composite signal is recorded, said composite signal being formed by frequency multiplexing a frequency-modulated luminance signal and a low-band converted carrier chrominance signal which is obtained by frequency-converting a carrier chrominance signal from a high frequency band to a low frequency band. The recording apparatus is constructed to separate the frequency-modulated luminance signal and the low-band converted carrier chrominance signal from the composite signal reproduced from said record bearing medium, to demodulate the frequency-modulated luminance signal to restore the luminance signal, to convert the low-band converted carrier chrominance signal into two kinds of color difference signals and to form R, G and B signals from the luminance signal and the two kinds of color-difference signals thus obtained. According to this construction, it is possible to form and output the R, G and B signals, without causing deterioration of signals.

    摘要翻译： 本发明涉及一种用于从记录有所述复合信号的记录承载介质再现复合信号的再现装置，所述复合信号通过频率复用经调频的亮度信号和低频带转换载波色度信号 其通过将载波色度信号从高频带频率转换为低频带而获得。 记录装置被构造成从所述记录承载介质再现的复合信号中分离调频亮度信号和低频带转换载波色度信号，以解调频率调制亮度信号以恢复亮度信号，以将 低频转换载波色度信号分为两种色差信号，并从亮度信号和由此得到的两种色差信号形成R，G和B信号。 根据这种结构，可以形成和输出R，G和B信号，而不会引起信号的劣化。