公开(公告)号：US4992891A

公开(公告)日：1991-02-12

申请号：US303749

申请日：1989-01-27

申请人： Keiichi Komatsu ,  Shinji Ozaki ,  Shigeyuki Itoh ,  Hikaru Masui ,  Yoshizumi Watatani

发明人： Keiichi Komatsu ,  Shinji Ozaki ,  Shigeyuki Itoh ,  Hikaru Masui ,  Yoshizumi Watatani

IPC分类号： H04N5/91 ,  G11B5/027 ,  G11B27/032 ,  H04N5/265 ,  H04N5/782 ,  H04N9/793 ,  H04N9/80

CPC分类号： H04N5/2621 ,  G11B27/032 ,  H04N5/265 ,  H04N5/782 ,  H04N9/793 ,  H04N9/80

摘要： A pair of recording heads are mounted on a rotary cylinder for recording a video signal in slanted tracks on magnetic tape. The recording heads are mounted in a common plane and each has a different azimuthal angle. A pair of reading heads are mounted on the same rotary cylinder for reading the video signal recorded on the magnetic tape. The reading heads are mounted in a plane offset from the plane of the recording heads and have azimuthal angles that match the azimuthal angles of the recording heads. A mixing circuit mixes a component of the video signal ready from the magnetic tape by one of the recording heads with a video signal from a video signal source to generate a mixed video signal. The mixed video signal is returned to one of the recording heads for recordation on the magnetic tape.

摘要翻译： 一对记录头安装在用于在磁带上的倾斜轨迹中记录视频信号的旋转圆筒上。 记录头安装在公共平面中，每个具有不同的方位角。 一对读取头安装在相同的旋转圆筒上，用于读取记录在磁带上的视频信号。 读取头安装在与记录头的平面偏移的平面中，并且具有与记录头的方位角匹配的方位角。 混合电路通过一个记录头将来自磁带的视频信号的分量与来自视频信号源的视频信号混合，以产生混合视频信号。 混合视频信号返回到一个记录头，用于在磁带上记录。

公开(公告)号：US4991026A

公开(公告)日：1991-02-05

申请号：US243849

申请日：1988-09-13

申请人： Osamu Takase ,  Hikaru Masui ,  Shigeyuki Itoh ,  Yoshizumi Watatani

发明人： Osamu Takase ,  Hikaru Masui ,  Shigeyuki Itoh ,  Yoshizumi Watatani

IPC分类号： H04N9/79 ,  H04N9/84 ,  H04N9/898

CPC分类号： H04N9/84 ,  H04N9/7917 ,  H04N9/898

摘要： A magnetic recording and reproducing apparatus for eliminating the crosstalk component from an adjacent track of a tape of a VTR and obtaining a high picture quality. Chrominance signals in the base band which are produced by a low frequency conversion chroma signal are supplied to comb-shaped filters which are used in the magnetic recording and reproducing apparatus. The chrominance signals in the base band are obtained by generating carriers synchronized with a burst signal of the low frequency conversion chroma signal including the jitter component upon reproduction and by multiplying the carriers and the low frequency conversion chroma signal. A burst signal portion between the resultant chrominance signals in the base band is applied as a frequency control input signal to an oscillator as the carrier generating source, so that desired carriers are derived. Thus, the frequency fluctuation is eliminated from the converted chrominance signal in the base band and the high picture quality can be realized.

公开(公告)号：US4994923A

公开(公告)日：1991-02-19

申请号：US305622

申请日：1989-02-03

申请人： Shigeyuki Itoh ,  Hikaru Masui ,  Yoshizumi Watatani

发明人： Shigeyuki Itoh ,  Hikaru Masui ,  Yoshizumi Watatani

IPC分类号： H04N9/79 ,  H04N9/793 ,  H04N9/83 ,  H04N9/87

CPC分类号： H04N9/7908 ,  H04N9/7917 ,  H04N9/793 ,  H04N9/83 ,  H04N9/87 ,  H04N9/8707

摘要： Herein disclosed is a color video signal recording and reproducing apparatus for recording and reproducing a luminance signal as a frequency-modulated wave and a chrominance signal as a down-converted chrominance signal in and from a recording medium. The color video signal recording and reproducing apparatus comprises: a demodulator for demodulating the down-converted chrominance signal reproduced from the recording medium to generate color difference signals R-Y and B-Y in a base frequency band; a signal processor for reducing noises from those color difference signals; and a modulator for subjecting the carrier wave, which has a frequency equal to that of a color subcarrier of a color video signal, to a quadrature two-phade modulation with the color difference signals processed by the signal processor, to reproduce the chrominance signal.

摘要翻译： 这里公开了一种彩色视频信号记录和再现装置，用于在记录介质中记录和再现作为调频波的亮度信号和作为下变频色度信号的色度信号。 彩色视频信号记录和再现装置包括：解调器，用于解调从记录介质再现的下变频色度信号，以在基本频带中产生色差信号R-Y和B-Y; 信号处理器，用于减少来自那些色差信号的噪声; 以及调制器，其将具有与彩色视频信号的彩色副载波频率相等的频率的载波用由信号处理器处理的色差信号进行正交二阶调制，以再现色度信号。

公开(公告)号：US4901297A

公开(公告)日：1990-02-13

申请号：US871

申请日：1987-01-06

申请人： Keiichi Komatsu ,  Shinji Ozaki ,  Hikaru Masui ,  Ken Kubo

发明人： Keiichi Komatsu ,  Shinji Ozaki ,  Hikaru Masui ,  Ken Kubo

IPC分类号： G11B5/02 ,  G11B7/003 ,  G11B7/09 ,  G11B11/10 ,  G11B11/105 ,  G11B15/467 ,  G11B15/62 ,  H04N5/84 ,  H04N9/82

CPC分类号： G11B15/62 ,  G11B11/10517 ,  G11B11/10532 ,  G11B11/10576 ,  G11B11/10595 ,  G11B15/467 ,  G11B7/003 ,  G11B7/09 ,  G11B7/0925 ,  H04N5/84 ,  H04N9/82

摘要： An optical magnetic recording and reproducing apparatus and method including an optical beam scanner for scanning a recording medium with an optical beam and forming a track having a predetermined angle with respect to the traveling direction of the recording medium, a magnetic field applying arrangement for applying the magnetic field onto the recording medium, and optical beam generator for generating the optical beam.

摘要翻译： 一种光磁记录和再现装置和方法，包括：用于用光束扫描记录介质的光束扫描器，并形成相对于记录介质行进方向具有预定角度的轨道;磁场施加装置， 磁场到记录介质上，以及用于产生光束的光束发生器。

公开(公告)号：US4809096A

公开(公告)日：1989-02-28

申请号：US6121

申请日：1987-01-23

申请人： Nobuo Azuma ,  Hikaru Masui ,  Yoshizumi Watatani

发明人： Nobuo Azuma ,  Hikaru Masui ,  Yoshizumi Watatani

IPC分类号： G11B5/592 ,  G11B15/467 ,  G11B5/588

CPC分类号： G11B15/4672 ,  G11B15/4678 ,  G11B5/5922

摘要： A tracking controlling device is provided which is suitable for a rotating head helical scanning-type magnetic video signal recording and reproducing apparatus in which pilot signals of a plurality of frequencies are recorded in advance on tracks on a magnetic tape such as to be superimposed on video signals, and the pilot signals are reproduced during reproduction so as to effect tracking control. This tracking controlling device comprises means for separating and detecting two reproducing pilot signals from both tracks adjacent to the track being scanned by the rotating head, a comparator for comparing the magnitude of the reproducing pilot signals from the adjacent tracks and for generating a binary PWM signal in accordance with the magnitude, and controlling means for controlling the rotation of a capstan motor for driving the magnetic tape using the tracking error signal converted into the form of the PWM signal obtained by the output of the comparator. The tracking error signal converted to the PWM signal is capable of directly switching over and controlling the driving circuit for the capstan motor.

摘要翻译： 提供了一种跟踪控制装置，其适用于旋转磁头螺旋扫描型磁视频信号记录和再现装置，其中预先将多个频率的导频信号记录在磁带上的轨道上以便叠加在视频上 信号，并且在再现期间再现导频信号，以便进行跟踪控制。 该跟踪控制装置包括用于从与由旋转头扫描的轨道相邻的两个轨道分离和检测两个再现导频信号的装置，用于比较来自相邻轨道的再现导频信号的幅度并用于产生二进制PWM信号的装置 以及控制装置，用于使用转换成由比较器的输出获得的PWM信号的形式的跟踪误差信号来控制用于驱动磁带的主导轴马达的旋转。 转换为PWM信号的跟踪误差信号能够直接切换并控制主导轴马达的驱动电路。

公开(公告)号：US5122869A

公开(公告)日：1992-06-16

申请号：US623827

申请日：1990-12-07

申请人： Norihide Kinugasa ,  Hikaru Masui ,  Yoshimitsu Saka ,  Koichi Yoshimura ,  Toshiaki Ioi ,  Narutoshi Kanazawa

发明人： Norihide Kinugasa ,  Hikaru Masui ,  Yoshimitsu Saka ,  Koichi Yoshimura ,  Toshiaki Ioi ,  Narutoshi Kanazawa

IPC分类号： H03L7/07 ,  H03L7/183 ,  H04N5/77 ,  H04N9/83

CPC分类号： H03L7/07 ,  H03L7/183 ,  H04N5/772 ,  H04N9/83

摘要： A video signal processing apparatus has a phase-locked loop which includes a quartz resonator, a voltage-controlled oscillator connected to the quartz resonator and oscillating at an oscillation frequency whose fundamental value is determined by the quartz resonator, and a horizontal sync signal lock circuit comparing a phase of a horizontal sync signal and a phase of an output signal from the voltage-controlled oscillator and controlling the oscillation frequency of the voltage-controlled oscillator in response to a difference between the phases of the horizontal sync signal and the output signal from the voltage-controlled oscillator. The video signal processing apparatus also has a device for modulating a video signal by use of the output signal from the voltage-controlled oscillator.

摘要翻译： 视频信号处理装置具有锁相环，该锁相环包括石英谐振器，连接到石英谐振器的压控振荡器，并以基波值由石英谐振器确定的振荡频率振荡;水平同步信号锁定电路 比较水平同步信号的相位和来自压控振荡器的输出信号的相位，并且响应于水平同步信号的相位和来自相应的输出信号之间的差异来控制压控振荡器的振荡频率 压控振荡器。 视频信号处理装置还具有通过使用来自压控振荡器的输出信号来调制视频信号的装置。