公开(公告)号：US4688081A

公开(公告)日：1987-08-18

申请号：US821444

申请日：1986-01-22

申请人： Takashi Furuhata ,  Hitoaki Owashi

发明人： Takashi Furuhata ,  Hitoaki Owashi

IPC分类号： H04N5/932 ,  H04N9/896 ,  H04N9/89

CPC分类号： H04N5/932 ,  H04N9/896

摘要： In order to correct a time base error of a video signal reproduced from a video signal recording/reproducing apparatus such as a VTR or the like, when the reproduced video signal is sequentially written into or read out from a memory, a signal which is obtained by frequency multiplying an output of an oscillator for generating a signal of a constant frequency whose phase is momentarily synchronized by a burst signal extracted from the reproduced video signal is used as a write clock. The signal based on the output of the oscillator and the signal based on the output of a reference signal generator for generating a read clock for the memory are phase compared for the vertical blanking period of the reproduced video signal, and a phase difference signal is generated. The oscillating frequency of the oscillator is controlled in a negative feedback manner using this phase difference signal, thereby assuring the stable oscillating frequency which does not cause any frequency deviation. To prevent that erroneous horizontal sync information is used when the burst signal is extracted, the write clock whose phase is synchronized with the reproduced video signal is counted until a predetermined count value and only the normal horizontal sync signal is separated, and also the dropout horizontal sync signal is corrected.

摘要翻译： 为了校正从诸如VTR等的视频信号记录/再现装置再现的视频信号的时基误差，当再现的视频信号被顺序地写入存储器或从存储器读出时，获得的信号 通过将用于产生其相位被从再现的视频信号提取的突发信号暂时同步的恒定频率的信号的振荡器的输出用作写入时钟。 基于振荡器的输出的信号和基于用于产生存储器的读取时钟的参考信号发生器的输出的信号被相位比较，用于再现的视频信号的垂直消隐周期，并且产生相位差信号 。 使用该相位差信号以负反馈方式控制振荡器的振荡频率，从而确保不引起任何频率偏差的稳定的振荡频率。 为了防止在提取脉冲串信号时使用错误的水平同步信息，将相位与再现的视频信号同步的写时钟计数直到预定的计数值，并且只有正常的水平同步信号被分离，并且还将丢弃水平 同步信号被校正。

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：US6104865A

公开(公告)日：2000-08-15

申请号：US881753

申请日：1992-05-06

申请人： Masakazu Hamaguchi ,  Takashi Furuhata ,  Hiroaki Takahashi

发明人： Masakazu Hamaguchi ,  Takashi Furuhata ,  Hiroaki Takahashi

IPC分类号： H04N5/91 ,  H04N9/79 ,  H04N9/80 ,  H04N5/92 ,  H04N5/921

CPC分类号： H04N9/7904 ,  H04N9/7925

摘要： A video signal recording and/or reproducing apparatus which is capable of recording and/or reproducing both high definition and standard television signals is disclosed. Accordingly, video signals of two systems such as the high definition and standard television signals can be recorded and/or reproduced by a single apparatus. The standard television signal is reproduced as a video signal having a high picture quality in a format similar to that of the high definition television signal. Even if the video signal to be recorded is the standard television signal, a reproduced picture having a higher picture quality than that of the standard television signal and having no distortion due to a difference in aspect ratios between the high definition and standard television signals can be provided.

摘要翻译： 公开了能够记录和/或再现高分辨率和标准电视信号的视频信号记录和/或再现装置。 因此，可以通过单个装置来记录和/或再现诸如高分辨率和标准电视信号的两个系统的视频信号。 标准电视信号被再现为具有与高分辨率电视信号类似的格式的具有高图像质量的视频信号。 即使要记录的视频信号是标准电视信号，具有比标准电视信号更高的图像质量并且由于高分辨率和标准电视信号之间的纵横比的差异而没有失真的再现图像可以是 提供。

公开(公告)号：US5699471A

公开(公告)日：1997-12-16

申请号：US192290

申请日：1994-02-04

申请人： Takashi Furuhata ,  Manabu Katsuki ,  Hiroki Mizosoe

发明人： Takashi Furuhata ,  Manabu Katsuki ,  Hiroki Mizosoe

IPC分类号： G11B5/008 ,  H04N5/7826 ,  H04N9/79 ,  H04N9/81

CPC分类号： G11B5/00878 ,  H04N5/78266 ,  H04N9/7925 ,  H04N9/81

摘要： An apparatus for recording and reproducing a video signal records all of effective line information required for transmission of respective picture images and voice information together with identification information in mutually resembling track patterns by setting the number of sampled picture elements per line (or block) and the number of lines (or the number of blocks) to be recorded in each track in accordance with a band ratio m of a first record video signal to a second record video signal. With this, it is possible to record and reproduce a plural types of video signals having mutually different bands and also different number of effective scanning lines and signal formats by one apparatus efficiently while checking enlargement of a circuit scale and with almost uniform picture quality performance in accordance with the difference of the bands.

摘要翻译： 用于记录和再现视频信号的装置通过设置每行（或块）的采样图像元素的数量，将相应图像和语音信息所需的有效行信息与识别信息一起记录在相似的轨迹图案中， 根据第一记录视频信号与第二记录视频信号的频带比m记录在每个磁道中的行数（或块数）。 由此，可以在检查电路规模的放大和几乎均匀的图像质量性能的同时，通过一个装置有效地记录和再现具有相互不同的频带和不同数量的有效扫描线和信号格式的多种类型的视频信号 根据乐队的差异。

公开(公告)号：US5499145A

公开(公告)日：1996-03-12

申请号：US151790

申请日：1993-11-15

申请人： Nobuo Azuma ,  Takashi Furuhata ,  Katsumi Takeda ,  Hiroaki Takahashi

发明人： Nobuo Azuma ,  Takashi Furuhata ,  Katsumi Takeda ,  Hiroaki Takahashi

IPC分类号： H04N5/7826 ,  G11B15/07 ,  G11B15/087 ,  G11B20/02 ,  G11B33/10 ,  H04N7/015 ,  H04N9/79 ,  H04N5/78

CPC分类号： H04N9/7921 ,  G11B15/07 ,  G11B15/087 ,  G11B33/10

摘要： A magnetic recording apparatus of the rotary head helical scan type which can selectively record input information signals of a plurality of signal formats includes an input signal kind discriminating circuit, a controller for generating control output signals to set each section of the magnetic recording apparatus into a predetermined mode on the basis of a recording mode command, a recording signal processing circuit which is respectively switched to a predetermined mode in accordance with an output signal of the controller, and a servo control circuit, wherein there is an effect such that one magnetic recording apparatus can automatically record the input signals of a plurality of formats such as an NTSC signal, an HD signal, and the like in the optimum mode by a simple and easy to use method.

摘要翻译： 可以选择性地记录多种信号格式的输入信息信号的旋转磁头螺旋扫描型的磁记录装置包括输入信号种类识别电路，用于产生控制输出信号的控制器，用于将磁记录装置的每个部分设置为 基于记录模式命令的预定模式，根据控制器的输出信号分别切换到预定模式的记录信号处理电路和伺服控制电路，其中存在一个磁记录 装置可以通过简单易用的方法在最佳模式下自动记录诸如NTSC信号，HD信号等多种格式的输入信号。

公开(公告)号：US5323273A

公开(公告)日：1994-06-21

申请号：US738470

申请日：1991-07-31

申请人： Nobuo Azuma ,  Takashi Furuhata ,  Yoshizumi Watatani ,  Hiroaki Takahashi ,  Katsumi Takeda

发明人： Nobuo Azuma ,  Takashi Furuhata ,  Yoshizumi Watatani ,  Hiroaki Takahashi ,  Katsumi Takeda

IPC分类号： G11B5/027 ,  G11B5/02 ,  G11B27/032 ,  G11B27/036 ,  H04N5/775 ,  H04N5/91 ,  H04N5/92 ,  H04N5/928

CPC分类号： G11B27/036 ,  H04N5/775 ,  H04N5/9202 ,  H04N5/928 ,  G11B2220/90 ,  G11B27/032

摘要： An audio signal recording and playback apparatus of a magnetic recording and playback apparatus operates to record and play back multiple audio signals together with a video signal in first and second recording areas formed in correspondence to audio signals of first and second sets each consisting of two channels. Among input stereo audio signals in four channels at most, two-channel signals corresponding to left and right side information are recorded as main audio signals in the first recording area and remaining two-channel signals are recorded selectively as ancillary audio signals in the second record area.

摘要翻译： 磁记录和重放装置的音频信号记录和重放装置用于在第一和第二记录区域中记录和再现多个音频信号以及视频信号，所述第一和第二记录区域对应于由两个通道组成的第一和第二组的音频信号形成 。 在最多四个通道的输入立体声音频信号中，对应于左侧和右侧信息的双声道信号作为主音频信号被记录在第一记录区域中，并且剩余的双声道信号被选择性地记录在第二记录中作为辅助音频信号 区。

公开(公告)号：US4972335A

公开(公告)日：1990-11-20

申请号：US298898

申请日：1989-01-19

申请人： Takashi Furuhata ,  Hiroaki Takahashi

发明人： Takashi Furuhata ,  Hiroaki Takahashi

IPC分类号： H04N5/92 ,  G11B20/02 ,  H04N5/7826 ,  H04N9/81

CPC分类号： H04N5/78266 ,  H04N9/81

摘要： Video signals within one vertical scanning period are divided into a plurality of line block signals. These line block signals are shifted on time base, and a redundant interval (.tau..sub.H) is formed between two line block signals. Further, a plurality of segment signals, each of which includes a plurality of line block signals, are formed. A redundant interval (.tau..sub.S) is formed between two segment signals. The interval of the vertical blanking signal is shortened. Recorded video signals comprise the redundant intervals (.tau..sub.S) and the segment signals including the redundant intervals (.tau..sub.H) and the line block signals. A horizontal synchronizing signal of negative polarity, for example, is added in the redundant interval (.tau..sub.H). Magnetic heads are switched in the redundant interval (.tau..sub.S).

摘要翻译： 在一个垂直扫描周期内的视频信号被分成多个行块信号。 这些线路块信号在时基上移位，并且在两个线路块信号之间形成冗余间隔（τH）。 此外，形成多个段信号，每个段信号包括多个行块信号。 在两个段信号之间形成冗余间隔（τS）。 垂直消隐信号的间隔缩短。 记录的视频信号包括冗余间隔（τS）和包括冗余间隔（tau H）和行块信号的段信号。 例如，在冗余间隔（τH）中添加负极性的水平同步信号。 磁头在冗余间隔（tau S）中切换。

公开(公告)号：US4825299A

公开(公告)日：1989-04-25

申请号：US91452

申请日：1987-08-31

申请人： Yoshinori Okada ,  Shigemitsu Higuchi ,  Hiroaki Takahashi ,  Yasufumi Yunde ,  Takashi Furuhata

发明人： Yoshinori Okada ,  Shigemitsu Higuchi ,  Hiroaki Takahashi ,  Yasufumi Yunde ,  Takashi Furuhata

IPC分类号： H04N9/83 ,  H04N9/89 ,  H04N9/896

CPC分类号： H04N9/896 ,  H04N9/89

摘要： A magnetic video recording/reproducing apparatus of high resolution, which excludes a phase difference introduced to a signal due to difference in characteristics between a low frequency conversion system and a high frequency conversion system by inserting an additonal signal to both systems. The additional signal is recorded together with the video signal and a phase difference is detected. The detected phase difference is utilized for regulating the phase difference in the respective frequency systems.

摘要翻译： 一种高分辨率的磁视频记录/再现装置，其通过向两个系统插入附加信号，排除由于低频转换系统和高频转换系统之间的特性差异而引入信号的相位差。 附加信号与视频信号一起被记录，并且检测到相位差。 所检测的相位差用于调节相应频率系统中的相位差。

公开(公告)号：US4366399A

公开(公告)日：1982-12-28

申请号：US221324

申请日：1980-12-29

申请人： Takashi Furuhata

发明人： Takashi Furuhata

IPC分类号： G05D13/62 ,  G01R23/15 ,  G11B15/467 ,  H02P23/00 ,  H02P29/00 ,  H03K9/06 ,  H03K5/19 ,  G11C27/02 ,  H03K6/00

CPC分类号： G11B15/467 ,  G01R23/15 ,  H02P23/22 ,  Y10S388/901 ,  Y10S388/915

摘要： A frequency discrimination circuit suitable for use in a speed control device is disclosed which comprises a single retriggerable monostable multivibrator for discriminating a period of an input pulse signal corresponding to a speed from a predetermined period, a gate for inhibiting the output of the multivibrator at least for a sampling period, and a trapezoidal wave generator for generating a trapezoidal wave when the output of the gate is absent, and a sample-and-hold circuit for sampling the trapezoidal wave by a sampling pulse synchronized with the input pulse signal and for holding a sampled value to generate a frequency discrimination output on the output side of the circuit. The provision of the retriggerable monostable multivibrator reduces undesirable variations the circuit operation due to the change in the ambient temperature, and prevents the generation of a false lock-in point.

摘要翻译： 公开了一种适用于速度控制装置的频率判别电路，其包括单个可再触发单稳态多谐振荡器，用于鉴别与预定周期相对应的速度的输入脉冲信号的周期，至少抑制多谐振荡器输出的门 以及用于在不存在栅极的输出时产生梯形波的梯形波发生器，以及采样保持电路，用于通过与输入脉冲信号同步的采样脉冲对梯形波进行采样，并用于保持 用于在电路的输出侧产生频率鉴别输出的采样值。 可再触发单稳态多谐振荡器的设置减少了由于环境温度变化引起的电路操作的不期望的变化，并且防止产生假锁定点。

公开(公告)号：US4301395A

公开(公告)日：1981-11-17

申请号：US895065

申请日：1978-04-10

申请人： Takashi Furuhata ,  Yasunori Kobori

发明人： Takashi Furuhata ,  Yasunori Kobori

IPC分类号： G05D13/62 ,  G11B15/48 ,  H02P1/16 ,  H02P23/00 ,  H02P29/00 ,  H02P5/16

CPC分类号： H02P23/186 ,  Y10S388/901 ,  Y10S388/902

摘要： A control device for phase-locking a rotating or traveling member to a reference signal within a short time at its starting stage, in which a phasic error signal produced as a result of comparison of the phases of the reference signal and a signal representative of the phasic position of the member is fed to the driver of the member through a gate which is non-conductive unless the speed of motion of the member reaches a predetermined value.

摘要翻译： 一种用于在其起始阶段在短时间内将旋转或行进构件相位锁定到参考信号的控制装置，其中作为参考信号的相位与表示基准信号的信号的比较而产生的相位误差信号 构件的相位位置通过不导电的浇口供给到构件的驱动器，除非构件的运动速度达到预定值。