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45 条记录 (耗时 0.032 秒)

    Automatic gain control device
    2.
    发明授权
    Automatic gain control device 失效
    自动增益控制装置

    公开(公告)号：US4963969A

    公开(公告)日：1990-10-16

    申请号：US314087

    申请日：1989-02-23

    申请人： Hiromu Kitaura ,  Mitsuo Isobe ,  Yuichi Ninomiya ,  Yoshimichi Ohtsuka ,  Yoshinori Izumi

    发明人： Hiromu Kitaura ,  Mitsuo Isobe ,  Yuichi Ninomiya ,  Yoshimichi Ohtsuka ,  Yoshinori Izumi

    IPC分类号： H04N5/04 ,  H04N5/52 ,  H04N7/015

    CPC分类号： H04N5/52

    摘要： Disclosed is an automatic gain control device which comprises: a first amplitude detection circuit for detecting an average amplitude value of a television video signal, a peak amplitude value of the same television video signal, or a value obtained by mixing the average amplitude value and the peak amplitude value with a predetermined mixing ratio; a second amplitude detection circuit for detecting an amplitude value of a vertical or horizontal synchronizing signal in the television video signal; an amplitude control circuit for controlling an amplitude of an input television video signal; a synchronization circuit for detecting a vertical synchronizing signal and a horizontal synchronizing signal in the television video signal so as to generate various pulses including a clock pulse synchronized with the input television video signal by controlling an oscillation frequency of an oscillation circuit; and a synchronization phase lock detection circuit for detecting whether the synchronization circuit has been pulled into synchronism with the input television video signal, so that the amplitude control circuit is controlled by an output of the second amplitude detection circuit when synchronization phase-lock is established while controlled by an output of the first amplitude detection circuit when the synchronization phase-lock comes out.

    摘要翻译： 公开了一种自动增益控制装置，包括：第一幅度检测电路，用于检测电视视频信号的平均振幅值，相同电视视频信号的峰值振幅值，或通过混合平均振幅值和 具有预定混合比的峰值振幅值; 第二振幅检测电路，用于检测电视视频信号中的垂直或水平同步信号的振幅值; 幅度控制电路，用于控制输入电视视频信号的幅度; 用于检测电视视频信号中的垂直同步信号和水平同步信号的同步电路，以通过控制振荡电路的振荡频率产生包括与输入电视视频信号同步的时钟脉冲的各种脉冲; 以及同步锁相检测电路，用于检测同步电路是否已被拉入与输入的电视视频信号同步，使得当建立同步锁相时，幅度控制电路由第二幅度检测电路的输出控制，而 当同步锁相出来时由第一幅度检测电路的输出控制。

    Television video signal control system
    4.
    发明授权
    Television video signal control system 失效
    电视视频信号控制系统

    公开(公告)号：US4970594A

    公开(公告)日：1990-11-13

    申请号：US314102

    申请日：1989-02-23

    申请人： Hiromu Kitaura ,  Yuichi Ninomiya ,  Yoshimichi Ohtsuka ,  Yoshinori Izumi

    发明人： Hiromu Kitaura ,  Yuichi Ninomiya ,  Yoshimichi Ohtsuka ,  Yoshinori Izumi

    IPC分类号： H04N5/14 ,  H04N5/16 ,  H04N5/18 ,  H04N5/53

    CPC分类号： H04N5/18 ,  H04N5/53

    摘要： A television video signal control system is disclosed in which an amplitude control signal and a clamp voltage control signal digitally detected in the automatic gain control and clamp voltage control of a television signal receiver respectively are applied alternately to a single D/A converter. The resulting analog signal is sampled and held alternately at holding circuits corresponding to the two control signals. A D/A converter for converting the two control signals from digital to analog state is thus saved as compared with the prior art.

    摘要翻译： 公开了一种电视视频信号控制系统，其中分别将电视信号接收机的自动增益控制和钳位电压控制中数字检测的幅度控制信号和钳位电压控制信号交替施加到单个D / A转换器。 所得到的模拟信号在对应于两个控制信号的保持电路处交替采样和保持。 因此与现有技术相比，可以节省用于将两个控制信号从数字转换为模拟状态的D / A转换器。

    Videodisc reproducing apparatus
    5.
    发明授权
    Videodisc reproducing apparatus 失效
    录像带重放装置

    公开(公告)号：US5062005A

    公开(公告)日：1991-10-29

    申请号：US304646

    申请日：1989-02-01

    申请人： Hiromu Kitaura ,  Yoshio Hirauchi

    发明人： Hiromu Kitaura ,  Yoshio Hirauchi

    IPC分类号： H04N9/797 ,  H04N9/87 ,  H04N9/89

    CPC分类号： H04N9/89 ,  H04N9/797 ,  H04N9/87

    摘要： A videodisc reproducing apparatus includes a pilot carrier extraction circuit for extracting a pilot carrier from a videodisc reproduced signal and a clock generating circuit. The clock generating circuit includes an analog/digital converter and a phase-locked loop oscillator for generating a sampling clock signal for the analog/digital converter, whereby the videodisc reproduced signal is converted into digital form in synchronism with the pilot carrier. A phase-shift circuit is provided for phase shifting the sampling clock signal and for applying a thus phase-shifted sampling clock signal to the analog/digital converter. A phase detecting circuit is provided for detecting a digital sampling phase of a synchronizing signal included in a MUSE signal of the videodisc reproduced signal which has been converted into digital form according to positional information in the synchronizing signal of the videodisc reproduced signal detected by a synchronizing signal detection circuit. The phase detecting circuit further detects whether the detected digital sampling phase is advanced or retarded with respect to a digital sampling phase of a specified normal MUSE signal. An up/down counter is provided for generating an address signal output according to an output of the phase detecting circuit to control the phase-shift circuit.

    摘要翻译： 视频盘重放装置包括：导频载波提取电路，用于从视频盘重放信号中提取导频载波;以及时钟产生电路。 时钟发生电路包括模拟/数字转换器和锁相环振荡器，用于产生用于模/数转换器的采样时钟信号，由此将视盘重放信号与导频载波同步地转换成数字形式。 提供了一个移相电路，用于对采样时钟信号进行相移，并将一个如此相移的采样时钟信号施加到模拟/数字转换器。 提供了一种相位检测电路，用于根据通过同步信号检测的视盘重放信号的同步信号中的位置信息，检测已经转换成数字形式的视盘重放信号的MUSE信号中包含的同步信号的数字采样相位 信号检测电路。 相位检测电路还检测检测到的数字采样相位是否相对于指定的正常MUSE信号的数字采样相位而被提前或延迟。 提供上/下计数器，用于根据相位检测电路的输出产生输出的地址信号，以控制相移电路。

    Synchronizing phase shift corrected synchronous signal detecting apparatus
    9.
    发明授权
    Synchronizing phase shift corrected synchronous signal detecting apparatus 失效
    同步相移校正同步信号检测装置

    公开(公告)号：US5220411A

    公开(公告)日：1993-06-15

    申请号：US713156

    申请日：1991-06-11

    申请人： Hiromu Kitaura ,  Takashi Inoue ,  Tokikazu Matsumoto ,  Nobuyuki Ogawa

    发明人： Hiromu Kitaura ,  Takashi Inoue ,  Tokikazu Matsumoto ,  Nobuyuki Ogawa

    IPC分类号： H04N5/956 ,  H04N5/93 ,  H04N9/87 ,  H04N9/896

    CPC分类号： H04N9/896 ,  H04N9/8715

    摘要： In a system for eliminating time base fluctuation of a video signal having a synchronizing signal and a burst reproduced from a video disk, for example, the synchronism is first coarsely pulled in on the basis of the horizontal synchronizing signal and then precisely follows the time base fluctuation on the basis of the burst signal. A shift of the output synchronizing signal is corrected by using a phase detection of an input horizontal synchronizing signal when an output synchronizing signal is produced on the basis of the read address of a memory for eliminating time base fluctuation, thereby preventing, for example, a superimposed character using the output synchronizing signal from fluctuating on a picture.

    摘要翻译： 在用于消除具有同步信号和从视频盘再现的脉冲串的视频信号的时基波动的系统中，例如，首先根据水平同步信号粗略地拉入同步，然后精确地跟随时基 基于突发信号的波动。 基于用于消除时基波动的存储器的读取地址产生输出同步信号时，通过使用输入水平同步信号的相位检测来校正输出同步信号的偏移，从而防止例如 使用来自图像上的波动的输出同步信号的叠加字符。

    Synchronous signal generator for the muse signal
    10.
    发明授权
    Synchronous signal generator for the muse signal 失效
    同步信号发生器用于muse信号

    公开(公告)号：US5148276A

    公开(公告)日：1992-09-15

    申请号：US620194

    申请日：1990-11-30

    申请人： Shigeru Furumiya ,  Yoshinari Takemura ,  Hiromu Kitaura

    发明人： Shigeru Furumiya ,  Yoshinari Takemura ,  Hiromu Kitaura

    IPC分类号： H04N5/08 ,  H03L7/087 ,  H03L7/091 ,  H03L7/199 ,  H04L7/04 ,  H04N5/10 ,  H04N7/015

    CPC分类号： H03L7/199 ,  H03L7/087 ,  H04N5/10 ,  H03L7/091

    摘要： A synchronous signal generator for use with the MUSE signal in the MUSE system which is a high definition television systems. A PLL circuit including a phase comparator and a voltage-controlled oscillator and a counter, is used to generate a system clock synchronized with an external clock. A frame synchronizing signal detected through a frame sychronization detection circuit from an inputted digital MUSE signal frame-resets the counter through a window circuit. The frame synchronization is established at an accuracy of a set range of the window circuit. Also, in this case, if the sychronization deviates on a clock by clock basis, a sampling phase error from a phase error computing circuit is monitored by a comparator circuit so that a deviation in the synchronization can be detected. When the synchronization deviates, by horizonally resetting the counter, the clock synchronization can be established. By effecting the three steps noted above, the synchronous signal generation for the digital MUSE signal can be properly achieved. Also, by combining an arrangement noted above with a conventional synchronous signal for an analog MUSE signal, a synchronous signal generator for both a digital MUSE signal and an analog MUSE signal can be provided.

    摘要翻译： 同步信号发生器，用于MUSE系统中的MUSE信号，该系统是高分辨率电视系统。 包括相位比较器和压控振荡器以及计数器的PLL电路用于产生与外部时钟同步的系统时钟。 通过帧同步检测电路从输入的数字MUSE信号帧检测的帧同步信号通过窗口电路复位计数器。 在窗口电路的设定范围的精度下建立帧同步。 此外，在这种情况下，如果同步在时钟上基于时钟偏移，则由比较器电路监视来自相位误差计算电路的采样相位误差，从而可以检测到同步偏差。 当同步偏离时，通过水平重置计数器，可以建立时钟同步。 通过进行上述三个步骤，可以适当地实现数字MUSE信号的同步信号产生。 此外，通过将上述装置与用于模拟MUSE信号的常规同步信号组合，可以提供用于数字MUSE信号和模拟MUSE信号的同步信号发生器。