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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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公开(公告)号：US4760449A
公开(公告)日：1988-07-26
申请号：US846819
申请日：1986-04-01
摘要： A video signal processing apparatus incorporates a 1H or 2H delay circuit, wherein H is a horizontal synchronization period. The output of the delay circuit is fed back to the input thereof so as to average the noise, thus raising the signal S/N ratio. The feedback line includes a nonlinear processing circuit which has a small gain when the signal input has a low vertical correlation, whereby the signal S/N ratio is improved without causing the delay of the color signal in the vertical direction nor the deteriorated resolution of the luminance signal.
摘要翻译： 视频信号处理装置包括1H或2H延迟电路，其中H是水平同步周期。 延迟电路的输出反馈到其输入端，以平均噪声，从而提高信号S / N比。 反馈线包括当信号输入具有低垂直相关性时具有小增益的非线性处理电路，从而改善信号S / N比，而不会导致颜色信号在垂直方向上的延迟，也不会导致劣化的分辨率 亮度信号。
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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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4.发明授权Control of auto-tracking in tracking-error correcting system of video recording/reproducing apparatus 失效视频记录/再现装置的跟踪误差校正系统中的自动跟踪控制
公开(公告)号：US4590523A
公开(公告)日：1986-05-20
申请号：US439712
申请日：1982-11-04
申请人： Masahiro Honjo , Masao Tomita , Masaaki Kobayashi
发明人： Masahiro Honjo , Masao Tomita , Masaaki Kobayashi
CPC分类号： G11B21/103 , G11B5/592
摘要： A tracking-error correcting system in a rotary head magnetic recording and reproducing apparatus in which reproducing magnetic heads are mounted on a respective bimorph leaf having piezoelectric elements so as to be movable in the direction of the axis of rotation. The piezoelectric elements are controlled by a control voltage which is produced by adding a signal from an auto-tracking circuit and a signal from a triangular wave generating circuit. In a reproducing mode at a tape speed which is different from a tape speed in recording mode, this system activates the auto-tracking circuit when the control voltage level is within a limited range which is detected by a control voltage detector. Also, this system stops the auto-tracking circuit during a transition period when the reproduction mode changes.
摘要翻译： 一种旋转磁头磁记录和再现装置中的跟踪误差校正系统，其中再现磁头安装在具有压电元件的相应的双压电晶片叶片上，以便能够在旋转轴线的方向上移动。 压电元件由通过添加来自自动跟踪电路的信号和来自三角波产生电路的信号产生的控制电压来控制。 在以与记录模式下的磁带速度不同的磁带速度的再现模式下，当控制电压电平处于由控制电压检测器检测到的限制范围内时，该系统激活自动跟踪电路。 此外，该系统在再现模式改变的过渡期间停止自动跟踪电路。
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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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6.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：US06731859B1
公开(公告)日：2004-05-04
申请号：US09206845
申请日：1998-12-07
申请人： Masahiro Honjo
发明人： Masahiro Honjo
IPC分类号： H04N593
CPC分类号： H04N5/783 , H04N5/85 , H04N9/8042 , H04N9/8063
摘要： In the skip reproduction from a frame X in a first access unit (XGOP) to a frame Y in a second access unit (YGOP), a reproduction method stores a front data and the data onward YGOP while display of frame X is maintained. Then, a front frame (I-picture) and onward is decoded and displayed in YGOP. Another reproduction method decodes the front frame (I-picture) to the frame Y in YGOP, and keeps on displaying the frame X instead of displaying the decoded frames until the frame Y is decoded. At the time when the frame Y is decoded, display of the coded frames starts. A further reproduction method does not decode the bi-directionally predictive coded frames between the front frame and the frame Y in YGOP. These respective methods can improve accuracy of a reproduced motion in the skip reproduction and reduce a freezing time of displaying a picture from which the skip starts.
摘要翻译： 在从第一访问单元（XGOP）中的帧X到第二访问单元（YGOP）中的帧Y的跳过再现中，再现方法在保持帧X的显示的同时存储前端数据和数据YGOP。 然后，前面的帧（I图像）和向前被解码并显示在YGOP中。 另一种再现方法将YGOP中的帧Y的前帧（I图像）解码，并且继续显示帧X而不是显示解码帧直到帧Y被解码。 当帧Y被解码时，编码帧的显示开始。 进一步的再现方法不解码YGOP中的前帧和帧Y之间的双向预测编码帧。 这些各自的方法可以提高跳过再现中的再现运动的精度，并且减少显示跳过开始的图像的冻结时间。
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公开(公告)号：US4931858A
公开(公告)日：1990-06-05
申请号：US298980
申请日：1989-01-19
申请人： Masahiro Honjo
发明人： Masahiro Honjo
IPC分类号： H04N5/14
CPC分类号： H04N5/142
摘要： A waveform improving apparatus improves the contour of a waveform of a first signal which has a reduced frequency band by using a control signal generated from a second signal which has a correlation to the first signal. A waveform adjusting circuit increases the level of the first signal waveform at the rising slope portion thereof and decreases the level of the first signal waveform at the falling slope portion thereof to obtain a waveform-adjusted first signal. A control pulse generating circuit differentiates the second signal twice to obtain a control pulse having a predetermined duration and terminating at the center of a slope portion of the first signal waveform. A sample/hold circuit is responsive to the control pulse for sampling a level of the waveform-adjusted first signal and holding the sampled level during the duration of the control pulse thereby obtaining a waveform improved first signal.
摘要翻译： 波形改善装置通过使用从与第一信号相关的第二信号产生的控制信号来提高具有降低的频带的第一信号的波形的轮廓。 波形调整电路在其上升斜坡部分增加第一信号波形的电平，并降低其下降斜率部分处的第一信号波形的电平，以获得经波形调整的第一信号。 控制脉冲发生电路对第二信号进行两次区分以获得具有预定持续时间并终止于第一信号波形的斜率部分的中心的控制脉冲。 采样/保持电路响应于控制脉冲，用于对波形调整的第一信号的电平进行采样，并且在控制脉冲期间保持采样电平，从而获得波形改善的第一信号。
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公开(公告)号：US4703343A
公开(公告)日：1987-10-27
申请号：US810689
申请日：1985-12-18
申请人： Masahiro Honjo
发明人： Masahiro Honjo
摘要： A comb filter which shows a comb filter characteristic when a vertical correlation of an input signal is large and allows the input signal to pass as is when the vertical correlation is small includes a delay circuit for delaying the input signal by a predetermined time to obtain a delayed signal, a vertical correlation detecting circuit for detecting the vertical correlation of the input signal from the input signal and the delayed signal and for outputting a vertical correlation signal corresponding to the vertical correlation when the vertical correlation is large but not outputting any signal when the vertical correlation is small, and an operational circuit for operating upon the input signal and an output signal of the vertical correlation detecting circuit to obtain an output signal of the comb filter. Another operational circuit for operating upon the input signal and a predetermined feedback signal obtained from the vertical correlation detecting circuit and for supplying the result to the delay circuit may be provided before the delay circuit to construct a feedback type comb filter. Furthermore, the input signal may be passed through another delay circuit before being supplied to the operational circuit for outputting the output signal so that an undesired time delay produced within the filter can be compensated for.
摘要翻译： 当垂直相关较小时，当输入信号的垂直相关性大并允许输入信号通过时，梳状滤波器具有梳状滤波器特性，该延迟电路用于将输入信号延迟预定时间以获得 延迟信号;垂直相关检测电路，用于检测来自输入信号的输入信号和延迟信号的垂直相关性，并且当垂直相关大时不输出任何信号，并输出垂直相关信号。 垂直相关性小，以及用于对输入信号进行操作的操作电路和垂直相关检测电路的输出信号，以获得梳状滤波器的输出信号。 可以在构成反馈型梳状滤波器的延迟电路之前提供用于对输入信号进行操作的另一个操作电路和从垂直相关检测电路获得的预定反馈信号并将结果提供给延迟电路。 此外，输入信号可以在被提供给操作电路之前通过另一个延迟电路，以输出输出信号，从而可以补偿在滤波器内产生的不期望的时间延迟。
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公开(公告)号：US06885775B2
公开(公告)日：2005-04-26
申请号：US09764381
申请日：2001-01-19
摘要： An image processing apparatus comprises a noise detection means for performing noise detection on an input image; a noise removal means for removing noise from a predetermined region of the input image, on the basis of the result of the noise detection; a counting means for obtaining the ratio of an area targeted for noise removal to the predetermined region of the input image; a statistics calculation means for obtaining the statistics on the ratios obtained by the counting means over a predetermined period of time; an image generation means for generating an image indicating the statistics; and an image composition means for superimposing the image generated by the image generation means on the image outputted from the noise removal means to generate a composite image for display. Therefore, the viewer can easily know how much noise is removed from the predetermined region of the input image, for every predetermined period of time.
摘要翻译： 图像处理装置包括噪声检测装置，用于对输入图像执行噪声检测; 噪声去除装置，用于根据噪声检测的结果从输入图像的预定区域去除噪声; 计数装置，用于获得针对噪声去除的区域与输入图像的预定区域的比率; 统计计算装置，用于在预定时间段内获得由计数装置获得的比率的统计; 用于产生指示统计数据的图像的图像产生装置; 以及图像合成装置，用于将由图像生成装置生成的图像叠加在从噪声去除装置输出的图像上，以生成用于显示的合成图像。 因此，观看者可以在每个预定时间段内容易地知道从输入图像的预定区域去除多少噪声。
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