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公开(公告)号：US4812783A
公开(公告)日：1989-03-14
申请号：US88218
申请日：1987-08-24
申请人： Masahiro Honjo , Akihiro Takeuchi , Atsuo Ochi , Shinichi Aki , Yukio Nakagawa , Masaaki Kobayashi
发明人： Masahiro Honjo , Akihiro Takeuchi , Atsuo Ochi , Shinichi Aki , Yukio Nakagawa , Masaaki Kobayashi
摘要： A PLL circuit for a phase comparator, a low-pass filter (LPF), a voltage-controlled oscillator (VCO) and a frequency divider. A first control circuit is responsive to a discontinuous phase change of a reference signal of the PLL circuit for inhibiting the operation of the phase comparator or disconnecting the LPF from the phase comparator during a predetermined period so that the discontinuous phase change information is not transmitted through the LPF to the VCO. At the same time, a second control circuit resets the frequency divider by a pulse of the reference signal after the discontinuous phase change or applies a voltage corresponding to the discontinuous phase change to the VCO so that the output signal of the frequency divider is locked in phase to the reference signal after the discontinuous phase change. With the cooperation of the first and second control circuits, the PLL circuit quickly recovers its stable state after the discontinuous phase change of the reference signal.
摘要翻译： 用于相位比较器的PLL电路，低通滤波器（LPF），压控振荡器（VCO）和分频器。 第一控制电路响应于PLL电路的参考信号的不连续相位变化，用于在预定时段期间禁止相位比较器的操作或者从相位比较器断开LPF，使得不连续相位变化信息不通过 LPF到VCO。 同时，第二控制电路在不连续相变之后通过参考信号的脉冲复位分频器，或将与不连续相位相对应的电压施加到VCO，使得分频器的输出信号被锁定 在不连续相变之后与参考信号相位。 通过第一和第二控制电路的协调，PLL电路在参考信号的不连续相变之后快速恢复其稳定状态。
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公开(公告)号：US4864424A
公开(公告)日：1989-09-05
申请号：US947414
申请日：1986-12-24
摘要： In a video signal recording/reproducing apparatus for recording and reproducing two-channel component signals, input two-channel component signals are processed separately from each other by two recording signal processing circuits to be recordable two-channel component signals. The recordable two-channel component signals are exchanged at predetermined intervals by a first switching circuit to be two combined signal each containing the recordable two-channel component signals which appear at periods corresponding to the exchanging invervals. The two combined signals are recorded on a recording medium via recording heads and reproduced from the recording medium via reproducing heads. The reproduced two combined signals are exchanged at the predetermined intervals by a second switching circuit to be the recordable two-channel component signals, which are thereafter processed separately from each other by two reproduced signal processing circuit to be the original two-channel component signals.
摘要翻译： 在用于记录和再现双通道分量信号的视频信号记录/再现装置中，通过两个记录信号处理电路将输入的双通道分量信号彼此分开处理，以便可记录双通道分量信号。 可记录的双通道分量信号由预定的间隔由第一切换电路交换为两个组合信号，每个组合信号包含出现在对应于交换反相器的周期的可记录的双通道分量信号。 两个组合的信号通过记录头记录在记录介质上，并通过再现头从记录介质再现。 再现的两个组合信号由第二切换电路以预定的间隔交换成可记录的双通道分量信号，然后由两个再现信号处理电路彼此分离成为原始双通道分量信号。
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3.发明授权Video tape recorder with particular format chrominance and luminance information 失效具有特定格式色度和亮度信息的录像机
公开(公告)号：US4761690A
公开(公告)日：1988-08-02
申请号：US902957
申请日：1986-09-02
IPC分类号： H04N5/7826 , H04N9/81 , H04N9/86 , H04N9/79 , H04N9/84
CPC分类号： H04N5/78263 , H04N9/81 , H04N9/86
摘要： A video tape recorder which records video signals on a magnetic tape in such a manner that a first signal having luminance information and a second signal having chrominance information are recorded alternately on each track and the first signal recorded on each track is adjacent to the first signal recorded on an adjacent track and the second signal recorded on each track is adjacent to the second signal recorded on the adjacent track. The first signal and the second signal are exchanged every predetermined period L to obtain two combined signals each composed of the first and second signals which occur alternately at intervals of the predetermined period L.
摘要翻译： 一种将磁带上的视频信号以具有亮度信息的第一信号和具有色度信息的第二信号的方式记录在每个磁道上并且记录在每个磁道上的第一信号与第一信号相邻的磁带录像机 记录在相邻轨道上并且记录在每个轨道上的第二信号与记录在相邻轨道上的第二信号相邻。 第一信号和第二信号在每个预定周期L进行交换以获得两个组合信号，每个组合信号由预定周期L间隔交替出现的第一和第二信号组成。
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4.发明授权Encoded data stream recording and reproducing apparatus with tape speed, channel number, and cylinder speed control in accordance with bit rate 失效根据比特率，具有磁带速度，通道号和气缸速度控制的编码数据流记录和再现设备
公开(公告)号：US5841941A
公开(公告)日：1998-11-24
申请号：US513485
申请日：1995-08-10
申请人： Kenji Morimoto , Tadashi Kunihira , Akihiro Takeuchi , Yasuo Hamamoto , Masazumi Yamada , Mutsuyuki Okayama , Atsuo Ochi , Masaaki Kobayashi , Akira Iketani
发明人： Kenji Morimoto , Tadashi Kunihira , Akihiro Takeuchi , Yasuo Hamamoto , Masazumi Yamada , Mutsuyuki Okayama , Atsuo Ochi , Masaaki Kobayashi , Akira Iketani
IPC分类号： G11B15/18 , G11B15/467 , G11B20/10 , G11B20/18 , G11B27/00 , H04N5/7826 , H04N5/783 , H04N9/79 , H04N9/797 , H04N9/804 , H04N9/82 , H04N5/765
CPC分类号： G11B15/4671 , G11B15/1875 , G11B15/4673 , G11B20/10 , G11B27/005 , H04N9/8042 , G11B20/1876 , H04N5/78263 , H04N5/783 , H04N9/7921 , H04N9/7973 , H04N9/8227
摘要： A recording and reproducing apparatus for an input encoded data stream having two different bit rates N.sub.1 and N.sub.2, where N.sub.1
摘要翻译： 一种用于具有两个不同比特率N1和N2的输入编码数据流的记录和再现装置，其中N1
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5.发明授权Signal processing apparatus for changing the frequency characteristics of an input signal 失效用于改变输入信号的频率特性的信号处理装置
公开(公告)号：US5299003A
公开(公告)日：1994-03-29
申请号：US849332
申请日：1992-03-10
申请人： Atsuo Ochi , Masayuki Yoneyama , Yasuo Hamamoto , Akihiro Takeuchi , Masaaki Kobayashi , Haruo Ohta
发明人： Atsuo Ochi , Masayuki Yoneyama , Yasuo Hamamoto , Akihiro Takeuchi , Masaaki Kobayashi , Haruo Ohta
CPC分类号： H04N7/24 , H03F1/3241 , H03G5/005 , H04N5/923 , H04N5/9315
摘要： A signal processing apparatus for changing the frequency characteristics of an input signal, e.g.--a video or audio signal, allows a signal to pass through a transmission circuit in a positive time sequence and then, allows the signal to be transmitted through another transmission circuit having the same transmission characteristics in a reverse time sequence with respect to the positive time sequence. Also, while the transmission circuit is arranged to have a zero-phase characteristic, each segment of a continuous signal is processed throughout a period which is equal to at least two times a duration of an impulse response direction of the transmission circuit. Accordingly, unwanted wave errors appearing at discontinuous regions of the signals are eliminated.
摘要翻译： 用于改变例如视频或音频信号的输入信号的频率特性的信号处理装置允许信号以正时序顺序通过传输电路，然后允许信号通过具有 相对于正时序的反向时间序列具有相同的传输特性。 此外，当发送电路被布置为具有零相位特性时，连续信号的每个段在等于发送电路的脉冲响应方向的持续时间的至少两倍的周期内被处理。 因此，消除了在信号的不连续区域出现的不期望的波形误差。
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公开(公告)号：US4807050A
公开(公告)日：1989-02-21
申请号：US948143
申请日：1986-12-29
CPC分类号： H04N9/825
摘要： A video signal recording/reproducing apparatus has, in a recording signal processing section, a first switching circuit for exchanging 2-channel component signals at intervals of nH (n: any integer, H: horizontal scanning period) to obtain two combined signals each containing the 2-channel component signals which appear alternately at periods of nH, and a first delay circuit for delaying one of the two combined signals by nH so that the same kind of signals appear at same timings in the two combined signals. The two combined signals one of which is delayed by nH will not be interfered with each other by crosstalks therebetween which will occur in the subsequent circuits including recording and reproducing heads. A reproduced signal processing section has a second delay circuit for delaying by nH a reproduced combined signal which corresponds to the combined signal which has not been delayed in the recording signal processing section so as to recover the original timing relation between reproduced two combined signals, and a second switching circuit for exchanging the reproduced two combined signals one of which is delayed by nH by the second delay circuit at intervals of nH to obtain the original 2-channel component signals.
摘要翻译： 视频信号记录/再现装置在记录信号处理部分中具有用于以nH（n：任意整数，H：水平扫描周期）的间隔交换2声道分量信号的第一切换电路，以获得两个组合信号，每个组合信号包含 在nH周期交替出现的2信道分量信号和用于将两个组合信号之一延迟nH的第一延迟电路，使得在两个组合信号中以相同的定时出现相同种类的信号。 其中一个被延迟了nH的两个组合信号将不会由于在包括记录和再现磁头的后续电路中将发生的串扰而彼此干扰。 再现信号处理部分具有第二延迟电路，用于通过nH延迟对应于在记录信号处理部分中未被延迟的组合信号的再现组合信号，以恢复再现的两个组合信号之间的原始定时关系，以及 第二切换电路，用于交换重放的两个组合信号，其中一个由第二延迟电路以nH的间隔延迟nH以获得原始的2信道分量信号。
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7.发明授权Magnetic recording and reproducing apparatus for recording upper-sidebond-eliminated FM signal 失效磁记录和重放装置，用于记录上侧消除的FM信号
公开(公告)号：US4979046A
公开(公告)日：1990-12-18
申请号：US253218
申请日：1988-10-03
摘要： A magnetic recording and reproducing apparatus which converts a video signal to an FM signal and records the FM signal on a magnetic recording medium has a filter which eliminates an upper sideband component of the FM signal before recording so as to thereby enhance an increase of the levels of the lower sideband components of the reproduced and thereby improve its S/N ratio FM signal.
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8.发明授权
公开(公告)号：US4489352A
公开(公告)日：1984-12-18
申请号：US367976
申请日：1982-04-13
CPC分类号： G11B27/005 , G11B5/592
摘要： A video signal recording/reproducing apparatus includes a first set of rotary heads mounted on a rotary disk and a second set of rotary heads mounted on head actuators which are also mounted on the rotary disk. The apparatus has two reproduction modes. A magnetic tape in the first reproduction mode is driven at a speed equal to the speed used in a recording mode. The magnetic tape in the second reproduction mode is driven at a speed which is different from the speed used in the recording mode. The apparatus has a negative feedback loop which detects the reproduced signal level of the second set of rotary heads and drives the head actuators in order to increase the reproduced signal level of the second set of rotary heads. In the first reproduction mode, the negative feedback loop is intermittently closed. At the period of time when the negative feedback loop is open, the negative feedback loop holds the value of its output signal to that of the last time period when the negative feedback loop was closed, and, in addition, the head actuator is not driven when the feedback loop is open. At a transitional period when the apparatus switches from the first reproduction mode to the second reproduction mode, a holding signal from the negative feedback loop is supplied to the head actuator.
摘要翻译： 视频信号记录/再现装置包括安装在旋转盘上的第一组旋转磁头和安装在头部致动器上的第二组旋转磁头，磁头驱动器也安装在转盘上。 该装置具有两种再现模式。 以与记录模式下使用的速度相等的速度驱动第一再现模式中的磁带。 以与记录模式下使用的速度不同的速度驱动第二再现模式中的磁带。 该装置具有负反馈回路，其检测第二组旋转磁头的重放信号电平并驱动磁头致动器，以增加第二组旋转磁头的重放信号电平。 在第一再现模式中，负反馈回路间歇地闭合。 在负反馈回路打开的时间段，负反馈回路将其输出信号的值保持为负反馈回路闭合的最后一个时间段的值，此外，头驱动器不被驱动 当反馈回路打开时。 在设备从第一再现模式切换到第二再现模式的过渡期间，来自负反馈回路的保持信号被提供给磁头致动器。
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公开(公告)号：US4994928A
公开(公告)日：1991-02-19
申请号：US189169
申请日：1988-05-02
申请人： Masahiro Honjo , Masaaki Kobayashi
发明人： Masahiro Honjo , Masaaki Kobayashi
IPC分类号： H03D3/00
CPC分类号： H03D3/00
摘要： A frequency demodulation circuit superposes pulses on an input frequency-modulated (FM) signal at substantially the peaks of the FM signal before demodulating the FM signal so that zero cross points of the FM signal can be correctly restored. A peak detection circuit detects peaks of the FM signal or peaks of the fundamental wave of the FM signal, which substantially correspond to the peaks of the FM signal. A pulse generating circuit generates, from the peak detection result, pulses respectively occurring at the same timings as those of the detected peak occurrance timings. The generated pulses are added to the FM signal to obtain the pulse-superposed FM signal.
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公开(公告)号：US4623940A
公开(公告)日：1986-11-18
申请号：US525567
申请日：1983-08-22
摘要： A magnetic reproducing apparatus which has a pair of main rotatable heads having different azimuth angles and a pair of auxiliary rotatable heads having different azimuth angles. When a magnetic tape is played back while it runs at a speed different from that at which it runs during a recording mode, playback output signals from the main and auxiliary rotatable heads are switched over to replace a reduction in the outputs from the main rotatable heads with the outputs from the auxiliary rotatable heads to produce a combined playback output signal. The combined playback output signal is passed through a variable delay line having a delay time varied by an output from a detector circuit which detects variations in horizontal synchronous signal intervals of the combined playback output signal. This varied delay time of the variable delay line can eliminate any skew distortions which would appear on a displayed image on the screen due to the variations in horizontal synchronous signal intervals of the combined playback output signal.
摘要翻译： 具有一对具有不同方位角的主旋转头和具有不同方位角的一对辅助旋转头的磁再现装置。 当磁带在与记录模式期间运行的速度不同的速度下播放时，来自主旋转磁头和辅助旋转磁头的重放输出信号被切换以替代来自主旋转磁头的输出的减小 与来自辅助可旋转头的输出产生组合的重放输出信号。 组合的重放输出信号通过可变延迟线，该可变延迟线具有由检测器电路的输出变化的延迟时间，该检测器电路检测组合的重放输出信号的水平同步信号间隔的变化。 可变延迟线的这种变化的延迟时间可以消除由于组合的重放输出信号的水平同步信号间隔的变化而在屏幕上显示的图像上出现的任何偏斜失真。
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