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公开(公告)号：US4506289A
公开(公告)日：1985-03-19
申请号：US435293
申请日：1982-10-19
申请人： Toshiaki Shirakami
发明人： Toshiaki Shirakami
CPC分类号： H04N9/75
摘要： A chroma-key signal generator is provided which may be utilized to effect an electronic insertion of a picture into another picture, by utilizing a color television signal. The generator includes a first color selection/clip circuit which selects any desired hue signal from three primary color signals and clips it at a given level to provide a first key signal, a second color selection/clip circuit which selects a hue signal of a different hue from the first mentioned hue signal, from the three primary color signals, and clips it at a given level to provide a second key signal, and a logical and arithmetic circuit which logically operates on the first and the second key signal to provide an output signal which is utilized as a key signal.
摘要翻译： 提供了色键信号发生器，其可以通过利用彩色电视信号来利用图像电子插入到另一图像中。 发生器包括第一颜色选择/剪辑电路，其从三原色信号中选择任何期望的色调信号，并将其以给定的水平进行剪辑以提供第一键信号;第二颜色选择/剪辑电路，其选择不同的色调信号 来自第一提到的色相信号的色调，来自三原色信号，并将其剪辑在给定的水平以提供第二键信号，以及逻辑和运算电路，其在第一和第二键信号上逻辑地操作以提供输出 信号被用作关键信号。
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公开(公告)号：US4209801A
公开(公告)日：1980-06-24
申请号：US901822
申请日：1978-05-01
CPC分类号： H04N9/646
摘要： The system herein for use in a television camera system normally generates contour correction signals from the green video signals but when the green video signal level falls below a predetermined level, the contour correction signals are also generated from the red video signal. The system allows for normal misregistration of the camera by extending the green video signal beyond the normal time period and by delaying the red video signal approximately one-half the amount the green video signal is extended to center the red signal with respect to the extended green video signal. The extended green video signal and delayed red video signals are compared and when the delayed red video signal amplitude exceeds the green video signal amplitude by a predetermined amount the difference signal contributes to the generation of the contour correction signals.
摘要翻译： 这里用于电视摄像机系统的系统通常从绿色视频信号产生轮廓校正信号，但是当绿色视频信号电平低于预定水平时，轮廓校正信号也从红色视频信号产生。 该系统通过将绿色视频信号延伸超过正常时间周期并允许将红色视频信号延迟大约为绿色视频信号延长的一半，使红色信号相对于扩展绿色居中，从而允许摄像机的正常对准 视频信号。 比较扩展绿色视频信号和延迟红色视频信号，并且当延迟的红色视频信号幅度超过绿色视频信号幅度预定量时，差信号有助于生成轮廓校正信号。
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公开(公告)号：US4527191A
公开(公告)日：1985-07-02
申请号：US465053
申请日：1983-02-09
申请人： Fumio Nagumo , Takashi Asaida
发明人： Fumio Nagumo , Takashi Asaida
CPC分类号： G06F7/505 , H04N11/04 , H04N9/09 , H04N9/67 , G06F2207/388
摘要： A digital signal processing circuit, for example, a digital signal adder circuit suitable for use in a digital color encoder for generating a digital composite color video signal from three digital primary color signals. At least two input digital signals are respectively supplied to a signal delay circuit which generates the digital signal in the form of skew bits wherein the higher bit is given a larger delay. The output signals of the signal delay circuit are supplied to an adder circuit in which the small number of bits of the digital signals are added during one clock interval. And, the output signal of the adder circuit is supplied to a further delay circuit which generates a digital signal in the form of linear bits wherein any bit in originally the same clock interval is given the same delay.
摘要翻译： 数字信号处理电路，例如适用于数字彩色编码器的数字信号加法器电路，用于从三个数字原色信号产生数字复合彩色视频信号。 至少两个输入数字信号被分别提供给信号延迟电路，该信号延迟电路以偏斜位的形式生成数字信号，其中较高的位被给予更大的延迟。 信号延迟电路的输出信号被提供给加法器电路，其中在一个时钟间隔期间相加数字信号的位数较少。 并且，加法器电路的输出信号被提供给另一个延迟电路，该延迟电路产生线性位形式的数字信号，其中原始相同时钟间隔中的任何位被给予相同的延迟。
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公开(公告)号：US4003078A
公开(公告)日：1977-01-11
申请号：US583385
申请日：1975-06-03
申请人： David Peter Owen
发明人： David Peter Owen
CPC分类号： H04N9/76
摘要： A sub carrier phase shifting circuit for use in digital television equipment comprising at least two monostable multivibrators connected in cascade. The sub carrier signal is applied to the first multivibrator. Adjusting means are connected to the control inputs of each multivibrator for adjusting the monostable period of the multivibrators. On receipt of an edge of a sub carrier wave the first multivibrator is driven from a first state to a second state whereby the first multivibrator effects a change of state at its output. The first multivibrator resets to its first state after the monostable period determined by the adjusting means to give an output delayed in relation to the edge of the sub carrier wave. The delayed output causes the second multivibrator to be driven from one state to its other whereby the second multivibrator effects a change of state at its output. The second multivibrator resets to its first state after the monostable period of the second multivibrator has elapsed, to give an output further delayed in relation to the edge of the sub carrier wave.
摘要翻译： 一种用于数字电视设备的副载波相移电路，包括至少两个串联连接的单稳态多谐振荡器。 副载波信号被施加到第一多谐振荡器。 调节装置连接到每个多谐振荡器的控制输入端，用于调整多谐振荡器的单稳态周期。 在接收到副载波的边缘时，第一多谐振荡器从第一状态驱动到第二状态，由此第一多谐振荡器在其输出处影响状态的改变。 在由调整装置确定的单稳态周期之后，第一多谐振荡器复位到其第一状态，以给出相对于副载波的边缘延迟的输出。 延迟输出使得第二多谐振荡器从一个状态驱动到另一个状态，由此第二多谐振荡器在其输出端实现状态的改变。 第二多谐振荡器在经过第二多谐振荡器的单稳态周期之后复位到其第一状态，给出相对于副载波的边缘进一步延迟的输出。
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