公开(公告)号：US4754322A

公开(公告)日：1988-06-28

申请号：US908669

申请日：1986-09-17

申请人： Akihide Okuda ,  Isao Nakagawa ,  Masato Sugiyama ,  Kenji Katsumata

发明人： Akihide Okuda ,  Isao Nakagawa ,  Masato Sugiyama ,  Kenji Katsumata

IPC分类号： H04N5/14 ,  H04N9/78

CPC分类号： H04N5/144 ,  H04N9/78

摘要： The present invention is for separating luminance signal Y and color difference signal C from the composite color television signal and includes a frame memory for storing the composite color television signal, a motion detector for detecting motion of a picture image on the basis of the signal read out from the frame memory, a correlation detector for detecting the magnitude of vertical correlation of pictures on the basis of the signal read out from the frame memory, a vertical-axis filter for performing YC-signal separation through a filtering operation in the vertical-axis direction, a time-axis filter for performing a filtering operation in the time-axis direction, a two-dimensional filter for performing YC-signal separation through a filtering operation in both the horizontal and vertical directions, and a mixer for mixing the outputs of the three filters in accordance with the magnitude of motion and the magnitude of vertical correlation.

摘要翻译： 本发明用于从复合彩色电视信号中分离亮度信号Y和色差信号C，并且包括用于存储复合彩色电视信号的帧存储器，用于基于读取信号检测图像的运动的运动检测器 从帧存储器出来的相关检测器，用于基于从帧存储器读出的信号来检测图像的垂直相关幅度的相关检测器，用于通过垂直方向上的滤波操作执行YC信号分离的垂直轴滤波器， 用于在时间轴方向上执行滤波操作的时间轴滤波器，用于通过水平和垂直方向上的滤波操作来执行YC信号分离的二维滤波器和用于混合输出的混频器 的三个滤波器根据运动的幅度和垂直相关的幅度。

公开(公告)号：US4733300A

公开(公告)日：1988-03-22

申请号：US938962

申请日：1986-12-08

申请人： Masato Sugiyama ,  Isao Nakagawa ,  Shigeru Hirahata ,  Kenji Katsumata ,  Sunao Suzuki

发明人： Masato Sugiyama ,  Isao Nakagawa ,  Shigeru Hirahata ,  Kenji Katsumata ,  Sunao Suzuki

IPC分类号： H04N5/21 ,  H04N5/14 ,  H04N5/208 ,  H04N5/28 ,  H04N7/01 ,  H04N5/44

CPC分类号： H04N5/142 ,  H04N7/012

摘要： In combination, a signal processing circuit for television signals includes a contour signal correction circuit for use in a television receiver and a scanning line interpolation circuit for converting a television signal of a signal structure for interlaced scanning into a television signal for sequential scanning.

摘要翻译： 综合起来，用于电视信号的信号处理电路包括用于电视接收机的轮廓信号校正电路和用于将用于隔行扫描的信号结构的电视信号转换成用于顺序扫描的电视信号的扫描线内插电路。

公开(公告)号：US4733297A

公开(公告)日：1988-03-22

申请号：US36431

申请日：1987-04-09

申请人： Kenji Katsumata ,  Masato Sugiyama ,  Akihide Okuda ,  Shigeru Hirahata ,  Isao Nakagawa ,  Sunao Suzuki

发明人： Kenji Katsumata ,  Masato Sugiyama ,  Akihide Okuda ,  Shigeru Hirahata ,  Isao Nakagawa ,  Sunao Suzuki

IPC分类号： H04N11/20 ,  H04N5/14 ,  H04N7/01 ,  H04N9/78

CPC分类号： H04N5/144 ,  H04N7/012 ,  H04N9/78

摘要： A video signal processing circuit of motion adaptive type includes a circuit for identifying motion of a picture in a video signal on the basis of a difference signal between at least a line signal appearing in an M-th field and a corresponding line signal appearing in an (M-1)th field so that, when a scanning line produced on the basis of the video signal is interpolated between scanning lines of the video signal to improve the picture quality, a signal for interpolating said scanning line is produced in a different manner depending on whether a portion of the video signal to the displayed is a still picture or a moving picture. The motion identifying circuit comprises a horizontal filter spreading the difference signal in the horizontal direction, a circuit delaying the output signal of the horizontal filter by one field after attenuation, a line memory delaying the output signal of the attenuating and delaying circuit by one line, and an output circuit generating a signal identifying the motion of the picture on the basis of the output signals of the horizontal filter, attenuating and delaying circuit and line memory.

摘要翻译： 运动自适应型视频信号处理电路包括一个电路，用于根据出现在第M场的线路信号和出现在第M场的相应线路信号之间的差分信号识别视频信号中的图像的运动 （M-1）场，使得当基于视频信号产生的扫描线被内插在视频信号的扫描线之间以提高图像质量时，以不同的方式产生用于内插所述扫描线的信号 取决于所显示的视频信号的一部分是静止图像还是运动图像。 运动识别电路包括在水平方向上扩展差分信号的水平滤波器，将衰减后的水平滤波器的输出信号延迟一个场的电路，将存储器的衰减延迟电路的输出信号延迟一行， 以及输出电路，其基于水平滤波器的输出信号，衰减和延迟电路和行存储器来产生识别图像的运动的信号。

公开(公告)号：US4707732A

公开(公告)日：1987-11-17

申请号：US918037

申请日：1986-10-14

申请人： Takaaki Matono ,  Toshinori Murata ,  Toshiyuki Kurita ,  Isao Nakagawa

发明人： Takaaki Matono ,  Toshinori Murata ,  Toshiyuki Kurita ,  Isao Nakagawa

IPC分类号： H04N9/78

CPC分类号： H04N9/78

摘要： A circuit for separating a luminance signal and a chrominance signal having the first, second, third, and fourth 1H delay lines each connected in series, a first comb filter including the first and second 1H delay lines, a second comb filter including the second and third 1H delay lines, a third comb filter including the third and fourth 1H delay lines, a first subtraction circuit for achieving a subtraction on an input signal to the first 1H delay line and an output signal from the second 1H delay line, a second subtraction circuit for achieving a subtraction on an input signal to the second 1H delay line and an output signal from the third 1H delay line, a third subtraction circuit for achieving a subtraction on an input signal to the third 1H delay line and an output signal from the fourth 1H delay line, and a minimum value detecting circuit connected to the first, second, and third subtraction circuits for detecting the minimum value from the subtraction results. This circuit selects by use of a switch an output signal from the comb filter for which the minimum subtraction result is detected by the minimum value detecting circuit and then outputs the selected signal. This circuit can appropriately separate the luminance and chrominance signals even in a case where the video signal includes a contour section.

摘要翻译： 一种用于分离亮度信号和具有串联连接的第一，第二，第三和第四1H延迟线的色度信号的电路，包括第一和第二1H延迟线的第一梳状滤波器，包括第二和第二1H延迟线的第二梳状滤波器， 第三1H延迟线，包括第三和第四1H延迟线的第三梳状滤波器，用于实现对第一1H延迟线的输入信号的减法和来自第二1H延迟线的输出信号的第一减法电路，第二减法线 用于实现对第二1H延迟线的输入信号的减法和来自第三1H延迟线的输出信号的电路，用于实现对第三1H延迟线的输入信号的减法的第三减法电路和来自 第四1H延迟线和连接到第一，第二和第三减法电路的最小值检测电路，用于从减法结果中检测最小值。 该电路通过使用来自梳状滤波器的输出信号通过开关选择最小值检测电路检测到最小相减结果，然后输出所选择的信号。 即使在视频信号包括轮廓部分的情况下，该电路也可适当地分离亮度和色度信号。

公开(公告)号：US4456885A

公开(公告)日：1984-06-26

申请号：US308589

申请日：1981-10-05

申请人： Isao Nakagawa ,  Kazuo Kondo ,  Mitsuru Kudo

发明人： Isao Nakagawa ,  Kazuo Kondo ,  Mitsuru Kudo

IPC分类号： H03H11/12 ,  H03H11/04 ,  H03F1/34 ,  H03G3/10

CPC分类号： H03H11/04

摘要： A time-constant circuit suitable for being fabricated into an integrated circuit comprising a resistive element with its one end connected to a first input terminal, an impedance converting circuit with its input connected to another end of said resistive element and its output connected to an output terminal, a variable gain differential amplifier with its one input connected to the output of said impedance converting circuit and its another input connected to a second input terminal, an adder circuit for adding an output from said amplifier and an input signal appearing on said second input terminal, and a capacitive element connected between the junction of said resistive element and said impedance converting circuit and the output of said adder circuit. A plurality of the time-constant circuits are combined to construct a filter circuit. The gain of the variable gain differential amplifier in each time-constant circuit is controlled by a common DC voltage, whereby the spread of characteristic values of the integrated circuit elements can be compensated.

摘要翻译： 一种适用于制造成集成电路的时间常数电路，包括其一端连接到第一输入端子的电阻元件，阻抗转换电路，其输入端连接到所述电阻元件的另一端，其输出端连接到输出端 端子，可变增益差分放大器，其一个输入端连接到所述阻抗转换电路的输出端，其另一个输入端连接到第二输入端子;加法器电路，用于将来自所述放大器的输出和输出信号出现在所述第二输入端 端子，以及连接在所述电阻元件和所述阻抗转换电路的结点与所述加法器电路的输出之间的电容元件。 组合多个时间常数电路构成滤波电路。 每个时间常数电路中的可变增益差分放大器的增益由共同的直流电压控制，从而可以补偿集成电路元件的特性值的扩展。

公开(公告)号：US4128848A

公开(公告)日：1978-12-05

申请号：US735029

申请日：1976-10-22

申请人： Isao Nakagawa

发明人： Isao Nakagawa

IPC分类号： H04N5/21 ,  H04N5/14 ,  H03K1/12 ,  H04B1/10

CPC分类号： H04N5/211

摘要： An automatic ghost-suppression system having an adder, a variable delay device, and a polarity and gain control device. The variable delay device is connected with the adder through the polarity and gain control device. A video signal is simultaneously applied to both the adder and the variable delay device, and added in the adder to the video signal which is delayed by the variable delay device and then preferably adjusted in its polarity and amplitude by the polarity and gain control device. On the other hand, a synchronizing signal is separated from the delayed video signal and used for generation of a gate signal for detecting a residual ghost during a vertical blanking period. From the video signal produced at the output of the adder, the residual ghost contained in the vertical blanking period is detected by the gate signal and used as a control signal for controlling the polarity and gain control device thereby to automatically suppress the ghost.

摘要翻译： 一种具有加法器，可变延迟装置以及极性和增益控制装置的自动重影抑制系统。 可变延迟装置通过极性和增益控制装置与加法器连接。 视频信号同时施加到加法器和可变延迟装置，并且在加法器中加到由可变延迟装置延迟的视频信号，然后通过极性和增益控制装置优选地以其极性和幅度进行调整。 另一方面，同步信号与延迟的视频信号分离，并用于在垂直消隐期间产生用于检测残留鬼影的门信号。 从加法器的输出端产生的视频信号中，通过门信号检测包含在垂直消隐期间的残留重影，并用作控制极性和增益控制装置的控制信号，从而自动抑制重影。

公开(公告)号：US3988775A

公开(公告)日：1976-10-26

申请号：US613501

申请日：1975-09-15

申请人： Isao Nakagawa ,  Akira Shibata ,  Toshio Murakami

发明人： Isao Nakagawa ,  Akira Shibata ,  Toshio Murakami

IPC分类号： H04N9/77 ,  H04N5/21 ,  H04B1/10 ,  H04B1/68

CPC分类号： H04N5/211

摘要： A ghost signal suppressing device comprises a circuit for suppressing the luminance signal of a ghost signal and a circuit for suppressing the color signal of the ghost signal. A delayed signal used for suppressing the ghost signal is produced at a single delay circuit and branched off to be used for both the suppressing circuits. The branched signals of the same delay time are individually adjusted in their amplitude and then subtracted from an original signal at the respective suppressing circuits.

摘要翻译： 鬼信号抑制装置包括用于抑制重影信号的亮度信号的电路和用于抑制重影信号的彩色信号的电路。 在单个延迟电路处产生用于抑制重影信号的延迟信号，并分支用于抑制电路。 相同延迟时间的分支信号在其幅度上分别调整，然后从相应的抑制电路的原始信号中减去。