公开(公告)号：US4402022A

公开(公告)日：1983-08-30

申请号：US225006

申请日：1981-01-14

申请人： Akira Hirota ,  Seisuke Hiraguri

发明人： Akira Hirota ,  Seisuke Hiraguri

IPC分类号： G05D3/12 ,  G11B5/588 ,  G11B15/60 ,  G11B21/10

CPC分类号： G11B15/602 ,  G11B5/588

摘要： A tracking control system is used in a magnetic reproducing apparatus which comprises a rotary magnetic head for successively reproducing recorded signals from parallel tracks existing obliquely with respect to the longitudinal direction of a magnetic tape. The tracking system comprises a head swinging mechanism for varying the height position of the rotary magnetic head, and swinging the tracing position of the rotary magnetic head with respect to the track of the magnetic tape in the width direction of the track, a head swinging voltage generating circuit for generating a head swinging voltage, one or a plurality of memories for sampling and memorizing a voltage which is to be supplied to the head swinging means, at a point in time corresponding to when the rotary magnetic head passes one or a plurality of predetermined relative tracing positions respective of the magnetic tape, a level detecting circuit for detecting the level of a signal reproduced by the rotary magnetic head at a point in time identical to that of the above, a maximum level detecting circuit for detecting whether the level detected by the level detecting circuit has reached a maximum, a control circuit for enabling the reading-out of the voltage memorized in the memory upon detection of the maximum level by the maximum level detecting circuit, and an adding circuit for adding the voltage read out from the memory and the head swinging voltage supplied from the head swinging voltage generating circuit, and supplying the added voltage to the head swinging mechanism.

摘要翻译： 在磁性重放装置中使用跟踪控制系统，其包括用于从相对于磁带的纵向倾斜地存在的平行轨迹连续地再现记录信号的旋转磁头。 跟踪系统包括头摆动机构，用于改变旋转磁头的高度位置，并使旋转磁头的跟踪位置相对于磁带在轨道的宽度方向上的轨道摆动，磁头摆动电压 用于产生磁头摆动电压的发生电路，一个或多个存储器，用于在与旋转磁头通过一个或多个磁头的情况相对应的时间点对要提供给磁头摆动装置的电压进行采样和存储 用于检测在与上述相同的时间点由旋转磁头再现的信号的电平的电平检测电路，用于检测是否检测到电平的最大电平检测电路 通过电平检测电路达到最大值的控制电路，用于使能读出备忘录中存储的电压 通过最大电平检测电路检测到最大电平，并且添加电路，用于将从存储器读出的电压和从磁头摆动电压产生电路提供的磁头摆动电压相加，并将加上的电压提供给磁头摆动 机制。

公开(公告)号：US4158857A

公开(公告)日：1979-06-19

申请号：US880387

申请日：1978-02-23

申请人： Seisuke Hiraguri

发明人： Seisuke Hiraguri

IPC分类号： H04N5/95 ,  G11B5/027 ,  G11B15/46 ,  H04N17/06 ,  H04N9/62

CPC分类号： H04N17/06

摘要： A jitter measuring apparatus forms a circuit for detecting the jitter component found in an input signal. A jitter indicating line signal is generated in response to the detected jitter component. At least one reference line signal is generated at a time point which deviates from the jitter indicating line signal. The jitter indicating line signal is supplied to a television receiver which displays it as a line which extends vertically and sways horizontally on the picture screen. The reference line signal is supplied to the television receiver where it is displayed as a reference line extending vertically at a reference position, for the jitter indicating line on the picture screen.

摘要翻译： 抖动测量装置形成用于检测在输入信号中发现的抖动分量的电路。 响应于检测到的抖动分量产生抖动指示线信号。 在偏离抖动指示线信号的时间点产生至少一个参考线信号。 抖动指示线信号被提供给电视接收机，其将其显示为在图像屏幕上垂直延伸并水平摇摆的线。 参考线信号被提供给电视接收机，其中它被显示为在参考位置垂直延伸的参考线，用于图像屏幕上的抖动指示线。

公开(公告)号：US4528605A

公开(公告)日：1985-07-09

申请号：US465466

申请日：1983-02-10

申请人： Seisuke Hiraguri

发明人： Seisuke Hiraguri

IPC分类号： G11B5/592 ,  G11B5/58

CPC分类号： G11B5/5922

摘要： A rotary magnetic head scanning control system in a magnetic recording and reproducing apparatus comprising a plurality of rotary magnetic heads and a head height position control mechanism, comprises a pilot signal generating circuit for generating a pilot signal during a recording mode, a circuit for controlling interruption of application of the pilot signal and a recording signal to each of the rotary magnetic heads, so that the pilot signal is supplied to one of the rotary magnetic heads together with the recording signal for a predetermined interval to record the pilot signal and the recording signal and thereafter interrupt application of the recording signal to the one rotary magnetic head to put the one rotary magnetic head into a reproducing state, and application of a recording signal to another rotary magnetic head is interrupted during a predetermined interval in which the other rotary magnetic head scans over a track part adjacent to a track part recorded with the pilot signal of a recorded track formed by the one rotary magnetic head to put the other rotary magnetic head in a reproducing state and thereafter supply the pilot signal to the other rotary magnetic head together with the recording signal for a predetermined interval to record the pilot signal and the recording signal, and a circuit for obtaining a control signal to be applied to the head height position control mechanism from the pilot signal reproduced as crosstalk from a track part adjacent to a scanning track, to apply the control signal thus obtained to the head height position control means and control the height positions of each of the rotary magnetic heads to become the same.

摘要翻译： 一种包括多个旋转磁头和磁头高度位置控制机构的磁记录和再现装置中的旋转磁头扫描控制系统，包括用于在记录模式期间产生导频信号的导频信号产生电路，用于控制中断的电路 将导频信号和记录信号施加到每个旋转磁头，使得导频信号与记录信号一起提供给一个旋转磁头一定的间隔，以记录导频信号和记录信号 然后将记录信号中断到一个旋转磁头，将一个旋转磁头放入再现状态，并且在另一个旋转磁头的预定间隔内将记录信号施加到另一旋转磁头被中断 扫描与跟飞行员记录的轨道部分相邻的轨道部分 点燃由一个旋转磁头形成的记录轨道，以将另一个旋转磁头放置在再现状态，然后将该导频信号与记录信号一起以预定间隔提供给另一个旋转磁头，以记录导频信号， 记录信号和用于从与扫描轨道相邻的轨道部分作为串扰再现的导频信号获得要施加到磁头高度位置控制机构的控制信号的电路，以将由此获得的控制信号应用于磁头高度 位置控制装置并且控制每个旋转磁头的高度位置变得相同。

公开(公告)号：US4412259A

公开(公告)日：1983-10-25

申请号：US234791

申请日：1981-02-17

申请人： Seisuke Hiraguri

发明人： Seisuke Hiraguri

IPC分类号： H04N5/7826 ,  G05D3/12 ,  G11B5/588 ,  G11B21/10 ,  G11B5/52

CPC分类号： G11B5/588

摘要： A magnetic recording and/or reproducing apparatus has a tracking control device for performing tracking control by varying the height position of a rotary head which rotates to record and/or reproduce signals in an oblique track on a magnetic tape, according to a control signal applied to the tracking control device. The magnetic recording and/or reproducing apparatus comprises a detecting device for detecting the height position of the rotary head at a predetermined position within an angular range of the rotary head, where the rotary head does not make contact with the magnetic tape, and a control signal forming circuit for forming a control signal according to the output of the detecting device and supplying the control signal to the tracking control device to control the height position of the rotary head so that the height position becomes constant.

摘要翻译： 磁记录和/或再现装置具有跟踪控制装置，用于通过改变旋转磁头的高度位置来执行跟踪控制，旋转磁头的旋转位置根据应用的控制信号在磁带上的倾斜磁道中记录和/或再现信号 到跟踪控制装置。 磁记录和/或再现装置包括检测装置，用于检测旋转头在旋转头的角度范围内的预定位置处的高度位置，其中旋转头不与磁带接触，并且控制 信号形成电路，用于根据检测装置的输出形成控制信号，并将控制信号提供给跟踪控制装置，以控制旋转头的高度位置，使得高度位置变得恒定。

公开(公告)号：US4402023A

公开(公告)日：1983-08-30

申请号：US239541

申请日：1981-03-02

申请人： Seisuke Hiraguri

发明人： Seisuke Hiraguri

IPC分类号： H04N5/7826 ,  G05D3/12 ,  G11B5/588 ,  G11B15/18 ,  G11B15/467 ,  G11B21/10

CPC分类号： G11B15/1808 ,  G11B5/588

摘要： A tracking control system is applied to a magnetic recording and/or reproducing apparatus in which magnetic heads (having gaps of mutually different azimuth angles) relatively scan a magnetic recording medium to record and/or reproduce an information signal thereon and/or therefrom. The tracking control system comprises a tracking reference signal supplying circuit for supplying a tracking reference signal to the magnetic heads so that the magnetic heads are positioned at a position where the recorded position of a tracking reference signal on both sides of the tracks adjacent to a certain track, is positioned successively shifted respectively along the track longitudinal direction with respect to the tracking reference signal recorded position at the above certain track. The magnetic head record the information signal together with the tracking reference signal. The tracking control system further comprises a discriminating circuit for discriminating the relative phase of a tracking reference signal reproduced from a reverse track which is adjacent to a normal track and recorded by a magnetic head having an azimuth angle different from that of a reproducing magnetic head, according to a tracking reference signal reproduced from the normal track which is recorded by a magnetic head having an azimuth angle identical to that of the reproducing magnetic head, tracking error signal deriving circuit for deriving a tracking error signal from the output signal of the discriminating circuit, and controlling circuit for controlling the relative scanning phase of the magnetic heads with respect to the track of the magnetic recording medium in response to the tracking error signal obtained by the tracking error signal deriving circuit. The frequency of the tracking reference signal supplied by the tracking reference signal supplying circuit is selected so that the level of the tracking reference signal reproduced from the normal track is always higher than that of the tracking reference signal reproduced from the reverse track.

公开(公告)号：US4145642A

公开(公告)日：1979-03-20

申请号：US825440

申请日：1977-08-17

申请人： Yoshiteru Kosaka ,  Seisuke Hiraguri

发明人： Yoshiteru Kosaka ,  Seisuke Hiraguri

IPC分类号： H02P7/288 ,  H02P5/16

CPC分类号： H02P7/2885 ,  Y10S388/901 ,  Y10S388/91 ,  Y10S388/912 ,  Y10S388/915

摘要： A system for controlling the rotation of a direct current motor has an armature resistance control circuit. An operational amplifier has one input terminal connected to the direct current motor and another input terminal connected to form a differential amplifier. A first resistor is connected between an output terminal of the operational amplifier and one of the input terminals. A second resistor is connected between the other input terminal of the operational amplifier and a terminal for applying a control signal voltage thereto. A third resistor is connected between the output terminal of the operational amplifier and the other input terminal. The rotational phase of a structure rotated by the direct current motor produces a phase detection signal. A phase comparing means compares the phase detection signal with a reference signal and applies the resulting output, phase comparison error signal as a control signal voltage. The armature resistance and the first, second, and third resistors are connected as a bridge circuit.

摘要翻译： 用于控制直流电动机旋转的系统具有电枢电阻控制电路。 运算放大器具有连接到直流电动机的一个输入端子和连接形成差分放大器的另一个输入端子。 第一电阻器连接在运算放大器的输出端和输入端之一之间。 第二电阻器连接在运算放大器的另一输入端和用于施加控制信号电压的端子之间。 第三电阻连接在运算放大器的输出端和另一输入端之间。 由直流电动机旋转的结构的旋转相位产生相位检测信号。 相位比较装置将相位检测信号与参考信号进行比较，并将所得到的输出相位比较误差信号作为控制信号电压。 电枢电阻和第一，第二和第三电阻器作为桥接电路连接。

公开(公告)号：US4414586A

公开(公告)日：1983-11-08

申请号：US308666

申请日：1981-10-05

申请人： Akira Hirota ,  Seisuke Hiraguri ,  Takashi Uchimi

发明人： Akira Hirota ,  Seisuke Hiraguri ,  Takashi Uchimi

IPC分类号： G11B5/588 ,  G11B15/18 ,  G11B21/10 ,  G11B21/04 ,  G11B21/02

CPC分类号： G11B15/1808 ,  G11B21/103 ,  G11B5/588

摘要： A pilot signal recording and reproducing system comprises a frequency generating circuit for successively generating a first frequency, a third frequency, a second frequency, and a fourth frequency in this order or in a reverse order for every recording unit of one track, where the first and second frequencies are mutually separated frequencies, selected from a first frequency group, and the third and fourth frequencies respectively are frequencies approximately equal to the first and second frequencies, selected from a second frequency group, a recording device for recording a frequency obtained from the frequency generating circuit as a pilot signal together with an information signal onto a recording medium, a comb filter for frequency-selecting pilot signals recorded on both sides of a track which is to be reproduced, where these pilot signals have mutually different frequencies and are included as crosstalk within a reproduced signal reproduced from the recording medium, a control circuit for controlling a delay time of a delay circuit within said comb filter and first and second filter circuits for respectively discriminating and separating pilot signals having mutually different frequencies obtained from the comb filter.

摘要翻译： 导频信号记录和再现系统包括频率产生电路，用于按照一个轨道的每个记录单元依次产生第一频率，第三频率，第二频率和第四频率，或者以相反的顺序产生第一频率，第三频率，第二频率和第四频率， 并且第二频率是从第一频率组中选择的相互分离的频率，并且第三和第四频率分别是从第二频率组中选出的大致等于第一和第二频率的频率，记录装置，用于记录从 频率发生电路作为导频信号与信息信号一起发送到记录介质上，梳状滤波器用于频率选择记录在待再现的磁道的两侧的导频信号，这些导频信号具有相互不同的频率并被包括 作为从记录介质再现的再现信号中的串扰，控制 用于控制所述梳状滤波器和第一和第二滤波器电路中的延迟电路的延迟时间的电路，用于分别鉴别和分离从梳状滤波器获得的具有相互不同频率的导频信号。

公开(公告)号：US4370524A

公开(公告)日：1983-01-25

申请号：US195639

申请日：1980-10-09

申请人： Seisuke Hiraguri

发明人： Seisuke Hiraguri

IPC分类号： G10L21/00 ,  G10L21/04 ,  G11B20/02 ,  G10L1/00

CPC分类号： G10L21/04

摘要： A time compression or expansion circuit for audio signals comprises an analog to digital converter (12), a random access memory (17), a latch circuit (18), a digital to analog converter (19), a clock pulse generator (13), a counter circuit (14), a data selector (16), and a timing controller (13). The timing controller (15) is supplied with a clock pulse from the clock pulse generator (13) and a timing signal from the counter circuit (18), and produces a series of writing-in pulses and a series of strobe pulses which exist alternately and have a common frequency regardless of the mode of compression or expansion or rate thereof. The analog to digital converter (12) converts an input audio signal (11) to a digital signal in response to a writing-in and reading-out switching pulse from the counter circuit (18). The random access memory (17) writes the signal from the analog to digital converter (12) in response to the writing-in pulse fed from the timing controller (15), into an address thereof designated by an address datum for writing-in, and reading a signal out of an address thereof designated by an address datum for reading-out in response to the strobe pulse of the common frequency in such a way that the written address of the memory is read multiple times or skipped being read according to the mode and rate. The latch circuit (18) holds the signal read out from the random access memory (17) in response to the strobe pulse from the timing controller (15).

摘要翻译： 用于音频信号的时间压缩或扩展电路包括模数转换器（12），随机存取存储器（17），锁存电路（18），数模转换器（19），时钟脉冲发生器（13） ，计数器电路（14），数据选择器（16）和定时控制器（13）。 定时控制器（15）被提供有来自时钟脉冲发生器（13）的时钟脉冲和来自计数器电路（18）的定时信号，并且产生一系列写入脉冲和一系列选通脉冲，其交替存在 并且具有共同的频率，而不管压缩或膨胀或其速率的模式如何。 响应于来自计数器电路（18）的写入和读出切换脉冲，模数转换器（12）将输入音频信号（11）转换成数字信号。 随机存取存储器（17）响应于从定时控制器（15）馈送的写入脉冲将来自模数转换器（12）的信号写入由用于写入的地址数据指定的地址， 以及响应于公共频率的选通脉冲，读取由地址数据指定的地址的信号，使得根据存储器的写入地址被读取多次或被跳过被读取 模式和速率。 锁存电路（18）响应于来自定时控制器（15）的选通脉冲，保持从随机存取存储器（17）读出的信号。

公开(公告)号：US4246616A

公开(公告)日：1981-01-20

申请号：US9077

申请日：1979-02-02

申请人： Seisuke Hiraguri ,  Akira Hirota

发明人： Seisuke Hiraguri ,  Akira Hirota

IPC分类号： G11B5/027 ,  G11B15/18 ,  G11B15/467 ,  H04N5/783 ,  H04N5/78 ,  G11B15/06

CPC分类号： G11B15/1808 ,  H04N5/783

摘要： A video signal reproducing system comprises a tape on which video signals are recorded along video tracks, which extend obliquely to the longitudinal direction of the tape with substantially no space therebetween. A control signal is recorded along a control track extending in the longitudinal direction, the video tracks being recorded by a plurality of rotating video heads having gaps of mutually different azimuth angles. The control signal is recorded along the control track interrelatedly with the recording of the video tracks by the video heads. A motor drives the tape in tape travel or stops the tape. A plurality of rotating, reproducing video heads successively trace the video tracks to pick up and reproduce the recorded video signals. The rotating video heads have gaps which have mutually different azimuth angles that are respectively the same as the first mentioned azimuth angles, and which have different height positions above the plane of rotation of the centers of the tracks in the width direction thereof. The control signals are reproduced from the control track of the traveling tape. A circuit delays the reproduced control signal by a specific time to obtain a delayed signal and uses this delayed signal to stop the motor and therefore the tape travel. The tape is stopped at a position relative to the reproducing video heads at which the reproduction is accomplished so that the time instant when the level of the reproduced video signal becomes a minimum is within or in the vicinity of the vertical blanking period.

摘要翻译： 视频信号再现系统包括一个磁带，视频信号沿视频轨道记录，该磁带沿着磁带的纵向方向倾斜延伸，基本上没有间隙。 沿着沿纵向方向延伸的控制轨道记录控制信号，视频轨迹由具有相互不同方位角的间隙的多个旋转视频头记录。 控制信号沿着与视频磁头对视频轨道的记录相关的控制轨迹进行记录。 电机驱动磁带行走磁带或停止磁带。 多个旋转的再现视频头连续地跟踪视频轨道以拾取和再现所记录的视频信号。 旋转视频头具有与第一方位角分别相同的相互不同的方位角的间隙，并且在其宽度方向上具有高于轨道中心的旋转平面的高度位置。 控制信号从行进带的控制轨道再现。 电路将再现的控制信号延迟特定时间以获得延迟的信号，并使用该延迟信号来停止电动机并因此使磁带行进。 磁带被停止在相对于再现的再现视频头的位置，使得当再现的视频信号的电平变得最小时的时刻在垂直消隐期间内或附近。

公开(公告)号：US3959817A

公开(公告)日：1976-05-25

申请号：US518769

申请日：1974-10-29

申请人： Yoshihiko Honjo ,  Seisuke Hiraguri

发明人： Yoshihiko Honjo ,  Seisuke Hiraguri

IPC分类号： G11B15/12 ,  H03F3/72

CPC分类号： G11B15/12 ,  H03F3/72

摘要： A switching circuit connects a magnetic head in a magnetic recording and reproducing apparatus. The magnetic head is used for recording and reproducing signals onto and from a magnetic recording medium. The switching circuit comprises a first electronic switch connected between ground, the output side of a recording amplifier, and one terminal of the magnetic head. The switch becomes nonconductive during the recording mode and becomes conductive during the reproducing mode. A second electronic switch circuit is connected substantially between ground, the other terminal of the magnetic head, and the input side of a reproducing amplifier. The second switch becomes conductive during recording and nonconductive during the reproducing mode.