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53 条记录 (耗时 0.022 秒)

    Tracking controlling device using multiple pilot signals in magnetic video signal recording and reproducing apparatus
    1.
    发明授权
    Tracking controlling device using multiple pilot signals in magnetic video signal recording and reproducing apparatus 失效
    在磁视频信号记录和再现装置中使用多个导频信号的跟踪控制装置

    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。

    Chrominance signal reproducing apparatus for video tape recorder
    2.
    发明授权
    Chrominance signal reproducing apparatus for video tape recorder 失效
    用于录像机的色度信号再现装置

    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.

    Dual record/read head video recording and playback apparatus with fade-in function
    3.
    发明授权
    Dual record/read head video recording and playback apparatus with fade-in function 失效
    具有淡入功能的双记录/读头视频录放设备

    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。

    Video signal recording and reproducing apparatus with signal processing circuit for improvement of picture quality
    4.
    发明授权
    Video signal recording and reproducing apparatus with signal processing circuit for improvement of picture quality 失效
    具有用于提高图像质量的信号处理电路的视频信号记录和再现装置

    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。

    Magnetic video recording/reproducing apparatus for video signals of different aspect ratios adapter unit
    6.
    发明授权
    Magnetic video recording/reproducing apparatus for video signals of different aspect ratios adapter unit 失效
    用于不同宽高比适配器单元的视频信号的磁视频记录/再现装置

    公开(公告)号：US5122885A

    公开(公告)日：1992-06-16

    申请号：US475963

    申请日：1990-02-06

    申请人： Atsushi Yoshioka ,  Yoshizumi Watatani ,  Nobuo Azuma ,  Tadasu Otsubo ,  Shuichi Matsuo

    发明人： Atsushi Yoshioka ,  Yoshizumi Watatani ,  Nobuo Azuma ,  Tadasu Otsubo ,  Shuichi Matsuo

    IPC分类号： H04N5/92 ,  H04N7/01 ,  H04N9/79 ,  H04N9/797 ,  H04N9/80 ,  H04N9/83

    CPC分类号： H04N9/832 ,  H04N9/797

    摘要： In a magnetic video recording/reproducing apparatus having a recording circuit for recording two kinds of video signals for different aspect ratios a.sub.1 and a.sub.2, where a.sub.1 >a.sub.2, a reproduced signal for aspect ratio a.sub.1 is subjected to a time-axis processing and then delivered to a monitor television having the aspect ratio a.sub.2 in order to avoid a picture on the monitor television from being so distorted as to be elongated vertically. During the time-axis processing, a Y/C interleave set-up processing and a time-axis variation correcting processing are also carried out as necessary. A reproduced signal for aspect ratio a.sub.2 is subjected to a time-axis processing and then delivered to a monitor television having the aspect ratio a.sub.1 in order to avoid a picture on the monitor television from being so distorted as to be elongated horizontally.

    摘要翻译： 在具有用于记录用于不同宽高比a1和a2的两种视频信号的记录电路的磁性视频记录/再现装置中，其中a1> a2，对长宽比a1的再现信号进行时间轴处理，然后传送 具有纵横比a2的监视器电视，以避免监视器电视机上的图像变得垂直变形。 在时间轴处理期间，根据需要还进行Y / C交错建立处理和时间轴变化校正处理。 纵横比a2的再现信号经历时间轴处理，然后传送到具有纵横比a1的监视电视机，以避免监视电视机上的图像变得水平变窄。

    Video tape recorder/player
    7.
    发明授权
    Video tape recorder/player 失效
    用于记录/再现具有不同宽高比的视频信号的录像机/播放器

    公开(公告)号：US5307171A

    公开(公告)日：1994-04-26

    申请号：US556578

    申请日：1990-07-24

    申请人： Nobuo Azuma ,  Yoshizumi Watatani ,  Atsushi Yoshioka ,  Shuichi Matsuo ,  Tadasu Otsubo

    发明人： Nobuo Azuma ,  Yoshizumi Watatani ,  Atsushi Yoshioka ,  Shuichi Matsuo ,  Tadasu Otsubo

    IPC分类号： H04N9/79 ,  H04N5/78 ,  H04N5/783

    CPC分类号： H04N9/7921

    摘要： A video tape recorder/player capable of selectively recording a wide-band video signal including information for forming a picture of an aspect ratio a.sub.1, and a normal video signal for forming a picture of an aspect ratio a.sub.2. The video tape recorder/player comprises video signal discriminating means for discriminating between the reproduced wide video signal and the reproduced normal video signal reproduced from a magnetic recording medium, and time expansion means for expanding the time base of the reproduced video signal by a factor approximately equal to the ratio a.sub.1 /a.sub.2. Either the reproduced video signal or the output signal of the time expansion means obtained by expanding the time base of the reproduced signal by the time expansion means can be selected as an output signal when the video signal discriminating means detects the wide video signal.

    摘要翻译： 能够选择性地记录包括用于形成长宽比a1的图像的信息的宽带视频信号的磁带录像机/播放机，以及用于形成纵横比a2的图像的通常的视频信号。 录像机/播放机包括视频信号识别装置，用于鉴别再现的宽视频信号和从磁记录介质再现的再现的正常视频信号，以及时间扩展装置，用于将再现的视频信号的时基以大约 等于a1 / a2的比率。 当视频信号鉴别装置检测到宽视频信号时，通过扩展时间扩展装置的再现信号的时基而获得的再现视频信号或时间扩展装置的输出信号可被选择为输出信号。