公开(公告)号：US4394701A

公开(公告)日：1983-07-19

申请号：US208476

申请日：1980-11-19

申请人： Kouichi Igata ,  Masaaki Kobayashi

发明人： Kouichi Igata ,  Masaaki Kobayashi

IPC分类号： G11B33/10 ,  G11B15/52

CPC分类号： G11B33/10

摘要： A recording time mode detector for automatically detecting the recording time mode of reproducing video tape. This detector is constructed of a counter which counts the number of rotations of the capstan which drives the reproducing video tape and is reset by a reproduced control signal. The recording time mode is detected by the count stored in the counter.

摘要翻译： 一种记录时间模式检测器，用于自动检测再现磁带的记录时间模式。 该检测器由计数器，该计数器对驱动再现录像带的绞盘的转数进行计数，并由再生的控制信号复位。 通过存储在计数器中的计数来检测记录时间模式。

公开(公告)号：US4600952A

公开(公告)日：1986-07-15

申请号：US697894

申请日：1985-02-01

申请人： Kouichi Igata ,  Yoshihiro Deguchi ,  Masaaki Kobayashi

发明人： Kouichi Igata ,  Yoshihiro Deguchi ,  Masaaki Kobayashi

IPC分类号： G11B5/008 ,  G11B5/53 ,  G11B15/14 ,  G11B15/18 ,  H04N5/783

CPC分类号： H04N5/783 ,  G11B15/14 ,  G11B15/1875 ,  G11B5/0086 ,  G11B5/00878 ,  G11B5/534

摘要： In a video tape recorder of the helical scan type, two auxiliary magnetic heads having different azimuth angles are provided in the vicinity of two main magnetic heads. The main and auxiliary magnetic heads have their tracks aligned so as to compensate for the reduced period of the reproduction signal of the main magnetic heads during high speed reproduction by using the reproduction signals of the auxiliary magnetic heads. Thus, blur free high speed reproduction pictures may be realized, and, at the same time, a dancing picture correction during still reproduction may be facilitated.

摘要翻译： 在螺旋扫描型的磁带录像机中，在两个主磁头附近设置两个具有不同方位角的辅助磁头。 主磁头和辅助磁头的轨道对齐，以便通过使用辅助磁头的再现信号来补偿在高速再现期间主磁头的再现信号的减少的周期。 因此，可以实现无模糊的高速再现图像，并且同时，可以促进静态再现期间的跳舞图像校正。

公开(公告)号：US4611252A

公开(公告)日：1986-09-09

申请号：US504513

申请日：1983-06-15

申请人： Kouichi Igata ,  Masaaki Kobayashi

发明人： Kouichi Igata ,  Masaaki Kobayashi

IPC分类号： H04N5/91 ,  G11B15/087 ,  G11B15/18 ,  G11B15/467 ,  G11B27/00 ,  H04N5/783 ,  H04N5/93 ,  G11B15/46

CPC分类号： G11B27/005 ,  G11B15/1875

摘要： A video tape recorder has a simple helical-scan construction capable of variable-speed reproduction free from noise bars on reproduced images at desired speeds ranging from a normal speed in reverse reproduction to threefold normal speed in forward reproduction. The video tape recorder comprises a magnetic tape drive mechanism including a capstan motor and a pinch roller for driving a magnetic tape, a control circuit for moving the magnetic tape at constant speeds including a normal speed, a twofold speed, a threefold speed in forward reproduction and a normal speed in reverse reproduction, and for keeping the magnetic tape stationary, a speed setting circuit for setting any one of the foregoing speeds as a tape running speed, a control signal reproducing circuit for reproducing control signals recorded on the magnetic tape at one-frame intervals, a control signal selection circuit for selecting a control signal dependent on a speed setting from the reproduced control signals, a time setting circuit for varying a time setting starting from a control signal selected by the control signal selection means, and a speed changing circuit for changing the normal speed in reverse reproduction, the stationary, the normal speed, the twofold normal speed, and the threefold normal speed in a time interval of a few frames.

摘要翻译： 磁带录像机具有简单的螺旋扫描结构，能够以从反向再现的正常速度到正向再现中的三倍的正常速度所需的速度，在再生图像上无噪声条的可变速再现。 磁带录像机包括一个磁带驱动机构，它包括一个主导轴马达和一个用于驱动磁带的夹送辊;一个控制电路，用于以一定速度移动磁带，包括正常速度，双倍速度，正向重放三倍速度 和反向再现中的正常速度，并且为了保持磁带静止，设置用于将上述速度中的任何一个设置为磁带运行速度的速度设置电路，用于再现记录在磁带上的控制信号的控制信号再现电路 帧间隔，控制信号选择电路，用于根据再现的控制信号选择取决于速度设定的控制信号;时间设定电路，用于从由控制信号选择装置选择的控制信号开始改变时间设定;以及速度 改变反向再现正常速度的电路，静止，正常速度，双倍正常速度 ，并且在几帧的时间间隔内的三倍的正常速度。

公开(公告)号：US4395741A

公开(公告)日：1983-07-26

申请号：US226172

申请日：1981-01-16

申请人： Masaaki Kobayashi ,  Kouichi Igata ,  Akihiro Takeuchi

发明人： Masaaki Kobayashi ,  Kouichi Igata ,  Akihiro Takeuchi

IPC分类号： H04N5/783 ,  G11B5/588 ,  G11B5/592 ,  G11B15/18 ,  G11B21/02 ,  H01L41/09 ,  G11B21/10

CPC分类号： G11B21/02 ,  G11B15/1808 ,  G11B5/588

摘要： A positionable element driving circuit for driving a positionable element compensates the supplied voltage-position characteristics of a bimorph type piezoelectric element which is used in a track following type video tape recorder/reproducer and which displaces the position of a video head. The supplied voltage to the bimorph type piezoelectric element is generated by an operational circuit which detects the track position of the video head. The circuit of the present invention compensates for the non-linearity and maintains the track following when the video tape recorder/reproducer is switched from one mode to another, e.g. from a still motion mode to a quick motion mode.

摘要翻译： 用于驱动可定位元件的可定位元件驱动电路补偿在轨道跟踪型录像机/再现器中使用的双压电晶片型压电元件的提供的电压位置特性，并且移位视频头的位置。 通过检测视频头的轨道位置的操作电路产生对双压电晶片型压电元件的供电电压。 本发明的电路补偿非线性并且当磁带录像机/再现器从一种模式切换到另一种模式时，维持跟踪。 从静止运动模式到快速运动模式。

公开(公告)号：US4748498A

公开(公告)日：1988-05-31

申请号：US931063

申请日：1986-11-17

申请人： Kazuhiro Yamanishi ,  Kouichi Igata

发明人： Kazuhiro Yamanishi ,  Kouichi Igata

IPC分类号： H04N5/21 ,  H04N5/213 ,  H04N5/911

CPC分类号： H04N5/21 ,  H04N5/213 ,  H04N5/911

摘要： A luminance signal processing circuit includes a delay circuit for delaying a signal by one horizontal period, a first adder for adding an input signal and an output signal of the delay circuit, a filter circuit for passing a specified frequency band of an output of the first adder, a first coefficient circuit for multiplying an output of the filter circuit with a specified coefficient, a second adder for adding an output of the first coefficient circuit and the input signal to use the sum output signal as the input signal to the delay circuit, a subtracter for subtracting the output signal of the delay circuit from the input signal of the delay circuit, an amplitude limiter for limiting the amplitude of an output of the subtracter, and a second coefficient circuit for multiplying an output of the amplitude limter with a specified coefficient. An output signal of the second coefficient circuit is substracted from the input signal to reduce noise in the input signal, or added to the input signal to emphasize the input signal. In the presence of vertical correlation, this circuit acts as a comb filter with a varied passing range depending on frequency to effectively reduce visible noise. In the absence of vertical correlation, the output signal is hardly affected and the noise reduction is not effected, so that the vertical resolution is not lowered.

摘要翻译： 亮度信号处理电路包括用于将信号延迟一个水平周期的延迟电路，用于将输入信号和延迟电路的输出信号相加的第一加法器，用于使第一个信号的输出的指定频带通过的滤波器电路 加法器，用于将滤波器电路的输出与指定系数相乘的第一系数电路，用于将第一系数电路的输出和输入信号相加的第二加法器，以将和输出信号用作到延迟电路的输入信号， 减法器，用于从延迟电路的输入信号中减去延迟电路的输出信号;限幅器，用于限制减法器的输出的幅度;以及第二系数电路，用于将幅度限制器的输出与指定的 系数。 第二系数电路的输出信号从输入信号减去，以减少输入信号中的噪声，或者加到输入信号上以强调输入信号。 在存在垂直相关的情况下，该电路用作具有取决于频率的变化的通过范围的梳状滤波器，以有效地减少可见噪声。 在不存在垂直相关的情况下，输出信号几乎不受影响，噪声降低不受影响，因此垂直分辨率不降低。

公开(公告)号：US4635137A

公开(公告)日：1987-01-06

申请号：US538926

申请日：1983-10-04

申请人： Tokikazu Matsumoto ,  Kouichi Igata

发明人： Tokikazu Matsumoto ,  Kouichi Igata

IPC分类号： H04N5/783 ,  G11B15/18 ,  G11B15/467 ,  H04N5/78

CPC分类号： G11B15/1875

摘要： In a tape recorder, when a magnetic tape changes its transportation speed for special reproduction, either one of a phase reference signal and a magnetic tape transportation phase signal representing the transportation phase of the magnetic tape is delayed by a delay circuit so that the signal not passing therethrough is compared with that having passed through the delay circuit, at which time the delay time of delay circuit is changed corresponding to the transportion speed of the magnetic tape so as to carry out phase control, thereby obtaining the optimum tracking in the reverse normal, double, and triple speed reproduction modes.

摘要翻译： 在磁带录音机中，当磁带改变其特殊再现的传输速度时，相位参考信号和代表磁带传输阶段的磁带传输相位信号中的任一个被延迟电路延迟，使得信号不 将其与通过延迟电路的通路进行比较，此时延迟电路的延迟时间根据磁带的传送速度而改变，从而进行相位控制，从而获得相反正常的最佳跟踪 ，双重和三倍速再现模式。