公开(公告)号：US4568986A

公开(公告)日：1986-02-04

申请号：US518688

申请日：1983-07-29

申请人： Takashi Furuhata ,  Kenji Satoh ,  Yoshiyuki Azuma ,  Yasuhide Mogi

发明人： Takashi Furuhata ,  Kenji Satoh ,  Yoshiyuki Azuma ,  Yasuhide Mogi

IPC分类号： H04N5/783 ,  G11B15/467 ,  H04N5/782 ,  G11B5/00 ,  G11B27/00

CPC分类号： G11B15/4678

摘要： A magnetic tape transport controller for a magnetic recording and reproducing apparatus in which a pilot signal for tracking control having four different frequencies is recorded on a magnetic tape by a rotary magnetic head and the magnetic tape is transported in a playback mode at a different tape speed than that in a recording mode. The tape transport controller has means for detecting an amplitude change of a specific one of signals derived by frequency-converting a reproduced pilot signal and controlling the tape speed such that the frequency of the amplitude change is maintained at a predetermined frequency. It also has a phase control loop to control the tape speed such that a phase of the specific signal coincides with a phase of a reference signal. In the playback mode in which the tape is transported at the different speed than that in the recording mode, frequencies of a local pilot signal used to frequency-convert the reproduced pilot signal are switched in the opposite order to that of the switching of the frequencies in the recording mode. A detection circuit which detects a difference between two frequency converted signals of different frequencies and amplifies the difference inverts a polarity of an output signal for each track switching in a standard speed playback mode and does not invert the polarity in a variable speed playback mode.

摘要翻译： 一种用于磁记录和再现装置的磁带传送控制器，其中用于具有四个不同频率的跟踪控制的导频信号通过旋转磁头记录在磁带上，并且磁带以不同的磁带速度以播放模式传送 比在录音模式。 磁带传送控制器具有用于检测通过对再现的导频信号进行频率转换而导出的特定信号的振幅变化的装置，并且控制磁带速度使得振幅变化的频率保持在预定频率。 它还具有相位控制回路以控制磁带速度，使得特定信号的相位与参考信号的相位一致。 在以与记录模式不同的速度传输磁带的重放模式中，用于频率转换再现的导频信号的本地导频信号的频率以与频率的切换相反的顺序被切换 在录音模式下。 检测不同频率的两个频率转换信号之间的差异并放大差异的检测电路在标准速度重放模式中对每个轨道切换的输出信号的极性反转，并且在变速重放模式中不反转极性。

公开(公告)号：US4954902A

公开(公告)日：1990-09-04

申请号：US336620

申请日：1989-04-10

申请人： Takashi Furuhata ,  Kenji Satoh

发明人： Takashi Furuhata ,  Kenji Satoh

IPC分类号： G11B5/592 ,  G11B15/467 ,  H04N5/7826 ,  H04N5/783 ,  H04N5/92 ,  H04N5/937

CPC分类号： G11B5/592 ,  G11B15/4675 ,  H04N5/783 ,  H04N5/937

摘要： A tracking control device for use in a rotary magnetic head type magnetic recording/reproducing apparatus, having a device for generating synchronizing signals in synchronism with the rotation of rotary magnetic heads, at a recording mode, records on a magnetic tape original information signals time-base converted so that the synchronizing information included in the information signals is in a predetermined synchronizing relation with said synchronizing signals, together with said synchronizing information; and at a reproduction mode of the recorded information, time-base converts the information signals and synchronizing information to restore the original information and controls the relative speed between the magnetic tape and rotary magnetic heads so that the time of the phase difference between the synchronizing signals and the reproduced synchronizing information is a predetermined value.

摘要翻译： 一种用于旋转磁头型磁记录/再现装置的跟踪控制装置，具有用于在记录模式下与旋转磁头的旋转同步地产生同步信号的装置，在磁带上记录原始信息信号， 基站转换，使得包含在信息信号中的同步信息与所述同步信号一起与所述同步信号预定的同步关系; 并且在记录信息的再现模式下，时基转换信息信号和同步信息以恢复原始信息并控制磁带和旋转磁头之间的相对速度，使得同步信号之间的相位差的时间 并且再现的同步信息是预定值。

公开(公告)号：US4507690A

公开(公告)日：1985-03-26

申请号：US382104

申请日：1982-05-26

申请人： Nobuo Azuma ,  Kenji Satoh ,  Katsuo Mohri ,  Takashi Furuhata

发明人： Nobuo Azuma ,  Kenji Satoh ,  Katsuo Mohri ,  Takashi Furuhata

IPC分类号： H04N5/7826 ,  G11B15/02 ,  G11B27/024 ,  G11B27/028 ,  H04N5/765 ,  H04N5/77 ,  H04N5/78

CPC分类号： G11B15/02 ,  G11B27/028 ,  H04N5/77 ,  G11B2220/90 ,  G11B27/024 ,  Y10S358/906

摘要： A device for controlling consecutive recording of video information containing signals, on a magnetic recording medium in a magnetic recording and reproducing apparatus, fed from a video camera with variable time spacing. The device comprises a control switch rendered non-conductive or conductive when a pause switch in the magnetic recording and reproducing apparatus is actuated or released, and a member for initializing a sync signal generator in the video camera with a signal produced in synchronism with the rotation of a head carrying disc driving motor of the magnetic recording and reproducing apparatus, whereby energy consumption is lowered and synchronization between successive video information signals is attained rapidly during the consecutive recording of video information signals from the video camera.

摘要翻译： 一种用于控制在具有可变时间间隔的摄像机馈送的磁记录和再现装置中的磁记录介质上连续记录包含信号的视频信息的装置。 该装置包括当磁记录和再现装置中的暂停开关被致动或释放时呈现非导通或导通的控制开关，以及用于利用与旋转同步产生的信号来初始化摄像机中的同步信号发生器的构件 的磁记录和再现装置的磁头驱动电动机，由此能量消耗降低，并且在从摄像机连续记录视频信息信号期间快速获得连续的视频信息信号之间的同步。

公开(公告)号：US4599569A

公开(公告)日：1986-07-08

申请号：US579593

申请日：1984-02-13

申请人： Takashi Furuhata ,  Taihei Nakama ,  Yuuhei Abe ,  Kenji Satoh

发明人： Takashi Furuhata ,  Taihei Nakama ,  Yuuhei Abe ,  Kenji Satoh

IPC分类号： H03K11/00 ,  H02P23/00 ,  H03K5/26 ,  H03L7/085

CPC分类号： H02P23/186

摘要： A detector circuit for detecting a phase or frequency error of an input signal. One mode of at least two detection modes is selected according to a phase or a frequency of the input signal with each mode having a reference value of a phase or a frequency of the input signal and reference values of the detection modes being different from each other. A pulse signal having a phase corresponding to a difference between an actual phase or frequency of the input signal and the reference value of the phase or the frequency is generated, and a predetermined carrier signal is pulse width modulated with a predetermined modulation factor in response to the pulse signal, the modulation factor being different for each detection mode.

摘要翻译： 用于检测输入信号的相位或频率误差的检测器电路。 根据输入信号的相位或频率来选择至少两个检测模式的一个模式，每个模式具有输入信号的相位或频率的参考值，并且检测模式的参考值彼此不同 。 产生具有对应于输入信号的实际相位或频率与相位或频率的参考值之间的差的相位的脉冲信号，并且响应于预定的调制因子而对预定载波信号进行脉冲宽度调制 脉冲信号，每个检测模式的调制因数不同。

公开(公告)号：US4916553A

公开(公告)日：1990-04-10

申请号：US170119

申请日：1988-03-15

申请人： Atsushi Yoshioka ,  Takashi Furuhata ,  Hitoaki Owashi ,  Katsuo Mouri

发明人： Atsushi Yoshioka ,  Takashi Furuhata ,  Hitoaki Owashi ,  Katsuo Mouri

IPC分类号： H04N5/7826 ,  H04N5/92 ,  H04N9/896

CPC分类号： H04N9/896 ,  H04N5/78266 ,  H04N5/92

摘要： In a rotary magnetic head helical scan type video tape recorder using a segment recording system, a video signal of one vertical scanning period is divided into n video signal blocks, where n is an integer equal to or larger than 2, and a redundant period having a selected length is inserted into the video signal blocks in a recording mode. Each of the video signal blocks has a number of horizontal scanning lines equal or smaller than N/n, where N is the number of the horizontal scanning lines in a field of the video signal. In a reproducing mode, a time axis error of reproduced series of the video signal blocks is corrected at least during the redunant periods. Then, the corrected blocks are converted into the original video signal.

摘要翻译： 在使用分段记录系统的旋转磁头螺旋扫描型磁带录像机中，将一个垂直扫描周期的视频信号分成n个视频信号块，其中n是等于或大于2的整数，并且具有 在记录模式下将选定的长度插入到视频信号块中。 每个视频信号块具有等于或小于N / n的多条水平扫描线，其中N是视频信号的场中的水平扫描线的数量。 在再现模式中，至少在冗余期间校正视频信号块的再现系列的时间轴误差。 然后，校正的块被转换成原始视频信号。

公开(公告)号：US4761523A

公开(公告)日：1988-08-02

申请号：US64043

申请日：1987-06-18

申请人： Kunio Mitsukuchi ,  Hiromitsu Ito ,  Isamu Eguchi ,  Bunji Hirasato ,  Takashi Furuhata

发明人： Kunio Mitsukuchi ,  Hiromitsu Ito ,  Isamu Eguchi ,  Bunji Hirasato ,  Takashi Furuhata

IPC分类号： H01H33/56 ,  H01H33/54

CPC分类号： H01H33/56 ,  H01H2033/568

摘要： Herein disclosed is a gas switch comprising: a body casing having an arc-extinguishing gas such as the SF6 gas and the like confined therein; bushings having their inner end portions inserted into said body casing; a rod-shaped stationary electrode and a hollow stationary electrode attached to the inner end portions of the bushings movable electrodes contacting with the rod-shaped stationary electrode at all times and made movable into and out of contact with said hollow stationary electrode; insulated bearing sleeves bearing the movable electrodes, respectively; a plurality of rocking arms for rocking in association with the turn of a drive shaft so that the movable electrodes are linearly moved through the insulated bearing sleeves by the rocking motions of the rocking arms to open and close the gas switch; and a connecting mechanism for connecting the rocking arms to the insulated bearing sleeves, respectively. The connecting mechanism includes: engaging grooves formed in the outer sides of the insulated bearing sleeves and opened at their sides facing the drive shaft; and engaging projections so formed in portions of the rocking arms as to directly engage with the engaging grooves and allowing in their engaging states the rocking arms to rock in the engaging grooves.

摘要翻译： 这里公开了一种气体开关，其包括：具有封闭在其中的诸如SF 6气体等的灭弧气体的主体壳体; 衬套的内端部插入到所述主体壳体中; 杆状固定电极和中空固定电极，其一直连接到与杆状固定电极接触的衬套可动电极的内端部，并且可移动地与所述中空固定电极接触和脱离接触; 分别承载可动电极的绝缘轴承套筒; 多个摇臂与驱动轴的转动相关地摇摆，使得可动电极通过摇臂的摇摆运动线性地移动通过绝缘的轴承套，以打开和关闭气体开关; 以及用于将摇臂分别连接到绝缘轴承套筒的连接机构。 连接机构包括：形成在绝缘轴承套的外侧并且在其面向驱动轴的侧面开口的接合槽; 以及如此形成在所述摇臂的部分中的接合突起，以与所述接合槽直接接合并且允许所述摇臂在所述接合状态下在所述接合槽中摇动。

公开(公告)号：US4600953A

公开(公告)日：1986-07-15

申请号：US579595

申请日：1984-02-13

申请人： Takashi Furuhata ,  Taihei Nakama ,  Yoshinori Masuda

发明人： Takashi Furuhata ,  Taihei Nakama ,  Yoshinori Masuda

IPC分类号： G11B15/14 ,  H04N5/783

CPC分类号： G11B15/14

摘要： In a helical scanning type video tape recorder provided with two rotary video heads for recording and reproducing a video signal supplied to the heads in the oblique direction of a magnetic tape by alternately switching the two rotary video heads, there is generated a switching signal for the heads which is stable in standard and high speed reproducing modes and thereby stable reproduction always can be obtained. For this purpose, there are provided a circuit for detecting the rotary phase of any one of the two rotary heads, a clock signal generator circuit for generating a clock signal, a counter apparatus for counting the clock signal on the basis of the output of the rotary phase detecting circuit, and a circuit for generating a switching signal for alternately switching the two heads on the basis of the counted value of the counter apparatus.

摘要翻译： 在具有两个旋转视频头的螺旋扫描型磁带录像机中，通过交替切换两个旋转视频磁头来记录和再现沿磁带的倾斜方向提供给磁头的视频信号，产生用于 在标准和高速再现模式下稳定的头部，从而可以总是获得稳定的再现。 为此，提供了一种用于检测两个旋转磁头中任何一个旋转磁头的旋转相位的电路，用于产生时钟信号的时钟信号发生器电路，用于根据该时钟信号的输出对时钟信号进行计数的计数器装置 旋转相位检测电路，以及用于根据计数器装置的计数值产生用于交替切换两个头的切换信号的电路。

公开(公告)号：US4210927A

公开(公告)日：1980-07-01

申请号：US903609

申请日：1978-05-08

申请人： Yasufumi Yumde ,  Takashi Furuhata

发明人： Yasufumi Yumde ,  Takashi Furuhata

IPC分类号： H04N11/02 ,  H04N11/04 ,  H04N9/32

CPC分类号： H04N11/042

摘要： A method for transmitting a color video signal on a narrow-band transmission line such as a telephone line or an audio tape recorder is disclosed. The carrier frequency is so reduced that no clock signal of high frequency is used. The carrier chrominance signal and the brightness or luminance signal are transmitted separately in time-division multiplication thereby to eliminate color distortion. The write clock signal frequency for the carrier chrominance signal is rendered inversely proportional to the product of a given number determined by the number of samples required for faithful transmission of the carrier chrominance signal and a multiple enabling the carrier frequency to be minimized. The read clock signal frequency for the carrier chrominance signal is reduced to one over an integer of the luminance signal, so that the carrier chrominance signal is read at intervals of the integer in order of storage in a memory. At the time of writing the color chrominance signal in the memory, the write clock frequency therefor is rendered equal to the write clock frequency for the luminance signal. Thus the capacity of the memory for the carrier chrominance signal is one over an integer of that for the luminance signal.

摘要翻译： 公开了一种在诸如电话线或音频磁带记录器的窄带传输线上发送彩色视频信号的方法。 载波频率减小，不使用高频时钟信号。 载波色度信号和亮度或亮度信号以时分乘法分开发送，从而消除颜色失真。 载波色度信号的写时钟信号频率与由载波色度信号的忠实传输所需的采样数确定的给定数乘以与允许载波频率最小化的倍数的乘积成反比。 用于载波色度信号的读取时钟信号频率减少到亮度信号的整数之一，使得载波色度信号以整数的间隔以存储在存储器中的顺序被读取。 在存储器中写入彩色色度信号时，其写入时钟频率等于亮度信号的写入时钟频率。 因此，用于载波色度信号的存储器的容量是用于亮度信号的容量的一个整数。

公开(公告)号：US5239421A

公开(公告)日：1993-08-24

申请号：US688284

申请日：1991-04-22

申请人： Masakazu Hamaguchi ,  Takashi Furuhata ,  Hiroaki Takahashi

发明人： Masakazu Hamaguchi ,  Takashi Furuhata ,  Hiroaki Takahashi

IPC分类号： H04N5/7826 ,  H04N5/94 ,  H04N5/956 ,  H04N9/81 ,  H04N9/88 ,  H04N9/896

CPC分类号： H04N5/956 ,  H04N5/94 ,  H04N5/78266 ,  H04N9/81 ,  H04N9/88 ,  H04N9/896

摘要： A method of reproducing video signals from a magnetic recording medium like a magnetic tape for a VTR to obtain high-quality video pictures even when dropouts occur in the medium, which includes the steps of separating synchronizing information from the video signals reproduced from the magnetic recording medium, detecting a dropout duration from the reproduced video signals, generating complete synchronizing information during a whole period of writing the signals in image information memories by compensating lost synchronizing information during the dropout, generating write address signals on the basis of the generated synchronizing information, writing reproduced video signals the memories on the basis of the generated write address signals while no dropout occurs, and leaving unchanged previously written video signals while a dropout occurs. According to an apparatus implementing the above method, reproduced pictures of high quality are obtained without jitters and skews due to dropouts.

摘要翻译： 一种从VTR用磁带等磁记录介质再现视频信号的方法，即使在介质中出现缺陷时也能获得高质量的视频图像，其中包括从与磁记录重现的视频信号分离同步信息的步骤 介质，从再现的视频信号中检测出一个压差持续时间，在通过在丢失期间补偿丢失的同步信息的整个写入信号在图像信息存储器中的整个周期期间产生完整的同步信息，根据生成的同步信息产生写入地址信号， 在不产生压降的情况下，根据所生成的写入地址信号对再现的视频信号进行写入，并且在出现发生缺陷的同时留下未改变的先前写入的视频信号。 根据实现上述方法的设备，获得高质量的再现图像，而不会由于丢失而产生抖动和偏差。

公开(公告)号：US4967161A

公开(公告)日：1990-10-30

申请号：US393958

申请日：1989-08-15

申请人： Takashi Furuhata ,  Hiroaki Takahashi ,  Manabu Katsuki

发明人： Takashi Furuhata ,  Hiroaki Takahashi ,  Manabu Katsuki

IPC分类号： H04N5/922 ,  G11B20/06 ,  H03G5/28 ,  H03G7/00 ,  H03H7/01 ,  H04N5/923

CPC分类号： H03G5/28 ,  H04N5/923

摘要： A signal processing method or apparatus in which an input signal is converted to a signal of a predetermined frequency characteristic and the resulting signal is reconverted to a signal of the original frequency characteristic, comprising: a first signal processing section for processing the input signal and having the first transfer function exp(-msT)/(1+K.multidot.cos(.omega.T) or a function approximating to the former function; a second signal processing section cascaded with the first signal processing section for processing the input signal and having a second transfer function of (1+K.multidot.cos(.omega.T).multidot.exp(-sT)), the first signal processing section having a linear phase characteristic and including an impedance circuit or an admittance circuit, each circuit including a ladder network of a plurality of inductance elements and capacitance elements.

摘要翻译： 一种信号处理方法或装置，其中输入信号被转换成预定频率特性的信号，并且所得信号被重新转换为原始频率特性的信号，包括：第一信号处理部分，用于处理输入信号并具有 第一传递函数exp（-msT）/（1 + Kxcos（ω-T））或接近前一函数的函数;与第一信号处理部分级联的第二信号处理部分，用于处理输入信号并具有第二传递函数 （1 + Kxcos（ω-T）×exp（-ST）），第一信号处理部分具有线性相位特性并包括阻抗电路或导纳电路，每个电路包括多个电感元件的梯形网络和电容 元素。