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公开(公告)号：US4910771A
公开(公告)日：1990-03-20
申请号：US383270
申请日：1989-07-19
CPC分类号： H04N7/1713
摘要： A television signal converter includes a CATV tuner having a channel converting function, a gain changing circuit for descrambling the output from the CATV tuner and the like, in order to convert a television signal such as a CATV signal formed by a scrambled video signal into a descrambled television signal of channel 3, for example. The descrambled channel 3 CATV signal outputted from the gain changing circuit includes noise in the reproduced audio signal since the audio carrier is influenced by gain changing. In the present invention, therefore, the audio signal is reproduced from an audio carrier extracted from the front stage of a gain changing circuit. Thus, the reproduced audio signal is released from noise caused by gain changing.
摘要翻译： 电视信号转换器包括具有信道转换功能的CATV调谐器，用于对来自CATV调谐器的输出进行解扰的增益改变电路等，以将诸如由加扰视频信号形成的CATV信号的电视信号转换为 通道3的解扰频电视信号。 由于音频载波受增益变化的影响，从增益改变电路输出的解扰频道3 CATV信号包括再现的音频信号中的噪声。 因此，在本发明中，从从增益改变电路的前级提取的音频载波再现音频信号。 因此，再现的音频信号由增益变化引起的噪声释放。
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公开(公告)号：US5351091A
公开(公告)日：1994-09-27
申请号：US3385
申请日：1993-01-12
申请人： Nobukazu Hosoya , Yoshichika Hirao
发明人： Nobukazu Hosoya , Yoshichika Hirao
CPC分类号： H04N9/893
摘要： A burst phase correcting circuit includes a first all-pass filter which receives a chrominance sign inputted from a terminal. A phase reference signal from an oscillator is applied to a first phase-comparator together with an output signal from the first all-pass filter, after the same is phase-shifted by 90 degrees by a first phase-shifter. A signal according to a phase difference of the both signals is outputted from the first phase-comparator and applied to the first all-pass filter via a first low-pass filter and a capacitor. Therefore, in the first all-pass filter, a delay time is varied in accordance with the phase difference between the chrominance signal and the phase reference signal. Therefore, a jitter component of the chrominance signal can be removed.
摘要翻译： 突发相位校正电路包括接收从终端输入的色度符号的第一全通滤波器。 来自第一个全通滤波器的相位参考信号与来自第一全通滤波器的输出信号一起被施加到第一相位比较器，在第一相位比较器被第一移相器相移90度之后。 根据两个信号的相位差的信号从第一相位比较器输出，经由第一低通滤波器和电容器施加到第一全通滤波器。 因此，在第一全通滤波器中，延迟时间根据色度信号和相位参考信号之间的相位差而变化。 因此，可以去除色度信号的抖动分量。
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3.发明授权Circuit for removing jitter of chrominance signal and television set using the same 失效用于移除使用其的色度信号和电视机的电路
公开(公告)号：US5153714A
公开(公告)日：1992-10-06
申请号：US590830
申请日：1990-10-01
摘要： A frequency of a chrominance signal including a jitter component and separated from a color video signal is converted from a first frequency to a second frequency by first frequency converting device. Then, the chrominance signal which frequency is converted to the second frequency is converted to have the original frequency by second frequency converting device. Each of the first frequency converting device and the second frequency converting device includes a multiplier and a bandpass filter. One multiplier of the first and the second frequency converting devices and receives a frequency signal corresponding to a phase difference between a reference frequency signal and a color burst signal separated from the chrominance signal. As a result, the jitter component is removed from the chrominance signal either in the first or the second frequency converting. In the first and the second frequency converting devices and, the input signal and the output signal so widely differ from each other in frequency that the respective frequency components included in the output signal of the multipliers in the respective frequency converting device expend widely along an axis of a frequency. As a result, the bandpass filter in each frequency converting device is enabled to easily extract only a signal of a desired frequency component.
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4.发明授权Synchronizing signal separating circuit separating synchronizing signal from a composite video signal 失效将同步信号与复合视频信号分离同步信号分离电路
公开(公告)号：US4999707A
公开(公告)日：1991-03-12
申请号：US500981
申请日：1990-03-29
CPC分类号： H04N5/08
摘要： A synchronizing signal separating circuit inverts and amplifies, in an inverter 12, a composite video signal received from a video amplifying circuit 100 through a coupling condenser 1. An output node B of the inverter 12 is connected to an input node A of the inverter 12 through a switch 14 and a bias resistor 10. A bias resistor 11 is connected between the input node A and a ground potential. An output of the inverter 12 is further inverted and amplified by an inverter 13 and outputted as a composite synchronizing signal and also supplied to a control input of the switch 14. As a result, the switch 14 is turned on in a synchronizing signal period, so that the coupling condenser 1 is charged with the output of the inverter 12 and also the electric charges of the coupling condenser 1 are discharged through the bias resistor 11 in other period than the synchronizing signal period. Therefore, irrespective of a APL of an inputted composite video signal, it is possible to maintain a level difference between a top level of the synchronizing signal and a separation level to be constant to correctly perform separation of the synchronization.
摘要翻译： 同步信号分离电路在逆变器12中通过耦合电容器1将从视频放大电路100接收的复合视频信号进行反相放大。反相器12的输出节点B连接到逆变器12的输入节点A 通过开关14和偏置电阻器10.偏置电阻器11连接在输入节点A和地电位之间。 逆变器12的输出进一步由反相器13反相并放大，并作为复合同步信号输出，并提供给开关14的控制输入。结果，开关14在同步信号周期中导通， 使得耦合电容器1对逆变器12的输出进行充电，并且耦合电容器1的电荷在同步信号周期的其他周期内通过偏置电阻器11放电。 因此，无论输入的复合视频信号的APL如何，都可以将同步信号的顶层与分离级别之间的电平差保持为恒定，以正确地执行同步的分离。
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5.发明授权Phase synchronizing circuit in video signal receiver and method of establishing phase synchronization 失效视频信号接收机中的相位同步电路和建立相位同步的方法
公开(公告)号：US4996596A
公开(公告)日：1991-02-26
申请号：US401691
申请日：1989-09-01
申请人： Yoshichika Hirao , Nobukazu Hosoya
发明人： Yoshichika Hirao , Nobukazu Hosoya
摘要： A circuit for providing a signal phase locked to a horizontal synchronization signal included in a received video signal includes a first PLL loop (16, 44, 46; 16, 46', 204) and a second PLL or AFC loop (26, 44, 46; 26, 44, 46', 204). The first PPL loop has a plurality of lock ranges. The second PLL or AFC loop, which has an output characteristic with a single S curve, has one lock range large in width. The second PLL or AFC loop is supplied with a horizontal synchronization signal separated in a synchronization separating circuit via a bandpass filter. The first PLL loop is directly supplied with a horizontal synchronization signal extracted in the synchronization separating circuit. The first PLL loop shares a voltage controlled oscillator (46; 46') and a frequency divider (46; 204) with the second PLL loop or AFC loop. This phase synchronizing circuit further includes a circuit (48) for detecting synchronization/non-synchronization of an output of the frequency divider circuit with the horizontal synchronization signal separated/extracted in the synchronization separating circuit, and a switching circuit (42) for activating one of the first PLL loop and the second PLL or AFC loop in response to an output of this synchronization detector circuit.
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公开(公告)号：US4942314A
公开(公告)日：1990-07-17
申请号：US245179
申请日：1988-09-16
CPC分类号： H04N9/68 , G11C27/026 , H04N9/72
摘要： A peak holding circuit comprises a capacitor for holding signal charges corresponding to a peak level of an input signal, and a current amplifier circuit comprising transistors connected in a triple darlington manner for supplying an output current corresponding to the held charges. An emitter of a transistor in the first stage out of the transistors connected in a darlington manner is connected to a collector of another transistor through which a collector cut-off current flows which is approximately equal to a collector cut-off current flowing through the transistor in the first stage. The other transistor has its emitter connected to ground. Therefore, the collector cut-off current flowing through the transistor in the first stage is cancelled, so that fluctuations in output current can be prevented even if a large reactive current is not allowed to flow through a transistor in the final stage out of the transistors connected in a darlington manner.
摘要翻译： 峰值保持电路包括用于保持与输入信号的峰值电平对应的信号电荷的电容器，以及包括以三重达赖顿方式连接的晶体管的电流放大器电路，用于提供与所保持的电荷相对应的输出电流。 在达赖顿方式连接的晶体管中的第一级晶体管的发射极连接到集电极截止电流流过的另一晶体管的集电极，其大约等于流过晶体管的集电极截止电流 在第一阶段 另一个晶体管的发射极连接到地。 因此，在第一级中流过晶体管的集电极截止电流被消除，从而即使无法大的无功电流不能通过最终级的晶体管流出晶体管，也可以防止输出电流的波动 以达林顿方式连接。
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7.发明申请Projection type video display and method of adjusting the same at factory shipping 失效投影式视频显示及其在工厂出货时的调整方法公开(公告)号：US20050030488A1
公开(公告)日：2005-02-10
申请号：US10891497
申请日：2004-07-15
申请人： Yoshichika Hirao , Naoki Kaise , Kenji Hyakutake
发明人： Yoshichika Hirao , Naoki Kaise , Kenji Hyakutake
CPC分类号： H04N9/3185 , G03B21/14 , H04N5/74 , H04N5/7441 , H04N9/3194 , H04N17/04
摘要： A microcomputer performs image drawing processing of a projection video for adjustment by an OSD (On-Screen Display) circuit when it detects the press of an adjustment command key. The projection video for adjustment is an image having a black-and-white area high in contrast formed therein. The projection video for adjustment is picked up by a CCD line sensor in a sensor. A microcomputer has its input an image pick-up signal from the CCD line sensor, to make focusing adjustment and trapezoidal distortion correction on the basis of the image pick-up signal.
摘要翻译： 微型计算机在检测到调整指令键的按下时，通过OSD（屏幕显示）电路进行用于调整的投影图像的图像绘制处理。 用于调整的投影视频是其中形成的对比度的黑白区域高的图像。 用于调整的投影视频由传感器中的CCD线传感器拾取。 微型计算机从CCD线传感器输入摄像信号，根据摄像信号进行聚焦调整和梯形失真校正。
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公开(公告)号：US06587139B1
公开(公告)日：2003-07-01
申请号：US09707934
申请日：2000-11-08
申请人： Yoshichika Hirao
发明人： Yoshichika Hirao
IPC分类号： H04N1702
摘要： Disclosed is a period measuring device comprising a clamping circuit to which a synchronizing signal in an input image signal is inputted, a comparator for removing noise in the synchronizing signal outputted from the clamping circuit, period measuring circuit for measuring the period of the synchronizing signal on the basis of the synchronizing signal obtained by the comparator, judging circuit for judging whether or not the period of the synchronizing signal which has been measured by the period measuring circuit is stable, and a control circuit for controlling, when the judging circuit judges that the period of the synchronizing signal is not stable, a threshold voltage of the comparator such that the period of the synchronizing signal is stabilized.
摘要翻译： 公开了一种周期测量装置，包括：输入图像信号中的同步信号被输入的钳位电路，用于去除从钳位电路输出的同步信号中的噪声的比较器，用于测量同步信号的周期的周期测量电路 由比较器获得的同步信号的基础，判断电路，用于判断由周期测量电路测量的同步信号的周期是否稳定;以及控制电路，用于当判断电路判断为 同步信号的周期不稳定，比较器的阈值电压使得同步信号的周期稳定。
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公开(公告)号：US07370980B2
公开(公告)日：2008-05-13
申请号：US10890988
申请日：2004-07-15
申请人： Yoshichika Hirao , Naoki Kaise
发明人： Yoshichika Hirao , Naoki Kaise
CPC分类号： H04N9/317 , G03B3/10 , G03B21/142 , H04N9/3185 , H04N9/3194
摘要： At the time of manual adjustment, a motor driving signal corresponding to a user's key operation is fed to a focusing motor from a microcomputer through a switch. At the time of automatic adjustment, the switch selects a motor driving signal from a sensor and feeds the selected motor driving signal to the focusing motor. The sensor contains a dedicated microcomputer. The dedicated microcomputer samples an image pick-up signal of a CCD line sensor in the sensor to generate contrast data, and automatically drives the focusing motor, to automatically make focusing adjustment.
摘要翻译： 在手动调节时，通过开关从微型计算机将对应于用户的键操作的电动机驱动信号馈送到聚焦电动机。 在自动调节时，开关选择传感器的电机驱动信号，并将所选择的电机驱动信号馈送到聚焦电机。 传感器包含专用微型计算机。 专用微型计算机对传感器中CCD线传感器的摄像信号进行采样，生成对比度数据，并自动驱动聚焦电机，自动进行聚焦调整。
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10.发明授权Projection type video display and method of adjusting the same at factory shipping 失效投影式视频显示及其在工厂出货时的调整方法公开(公告)号：US07156524B2
公开(公告)日：2007-01-02
申请号：US10891497
申请日：2004-07-15
申请人： Yoshichika Hirao , Naoki Kaise , Kenji Hyakutake
发明人： Yoshichika Hirao , Naoki Kaise , Kenji Hyakutake
CPC分类号： H04N9/3185 , G03B21/14 , H04N5/74 , H04N5/7441 , H04N9/3194 , H04N17/04
摘要： A microcomputer performs image drawing processing of a projection video for adjustment by an OSD (On-Screen Display) circuit when it detects the press of an adjustment command key. The projection video for adjustment is an image having a black-and-white area high in contrast formed therein. The projection video for adjustment is picked up by a CCD line sensor in a sensor. A microcomputer has its input an image pick-up signal from the CCD line sensor, to make focusing adjustment and trapezoidal distortion correction on the basis of the image pick-up signal.
摘要翻译： 微型计算机在检测到调整指令键的按下时，通过OSD（屏幕显示）电路进行用于调整的投影图像的图像绘制处理。 用于调整的投影视频是其中形成的对比度的黑白区域高的图像。 用于调整的投影视频由传感器中的CCD线传感器拾取。 微型计算机从CCD线传感器输入摄像信号，根据摄像信号进行聚焦调整和梯形失真校正。
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