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1. 发明授权

US5177600A Noise reduction circuit 失效
标题翻译：降噪电路
公开(公告)号：US5177600A
公开(公告)日：1993-01-05
申请号：US697396
申请日：1991-05-09
申请人： Hiroki Monta , Kiyoshi Imai , Atsuhisa Kageyama
发明人： Hiroki Monta , Kiyoshi Imai , Atsuhisa Kageyama
IPC分类号： H04N5/21 , H03H15/00 , H04B1/10 , H04N9/64 , H04N9/78
CPC分类号： H04N9/646
摘要： Disclosed is a noise reduction circuit in which a YC-separated luminance signal and a YC-separated chromaticity signal are separately processed for noise reduction. In the noise reduction circuit, delay elements incorporated in a YC separation circuit are also used as delay elements in a contour correction circuit so as to attain the desired purpose of noise reduction in both the luminance signal and the chromaticity signal and also the desired purpose of contour correction. Thus, both the noise reduction and the contour correction can be achieved by the noise reduction circuit which is simple in structure and inexpensive.
摘要翻译：公开了一种噪声降低电路，其中分离出YC分离的亮度信号和YC分离的色度信号以进行降噪。在噪声降低电路中，包含在YC分离电路中的延迟元件也用作轮廓校正电路中的延迟元件，以达到在亮度信号和色度信号两者中降低噪声的期望目的，轮廓校正。因此，噪声降低和轮廓校正可以通过结构简单且价格便宜的降噪电路来实现。

2. 发明授权

US5289282A Video signal gradation corrector 失效
标题翻译：视频信号灰度校正器
公开(公告)号：US5289282A
公开(公告)日：1994-02-22
申请号：US886801
申请日：1992-05-22
申请人： Toshiaki Tsuji , Atsuhisa Kageyama , Kiyoshi Imai
发明人： Toshiaki Tsuji , Atsuhisa Kageyama , Kiyoshi Imai
IPC分类号： G06T5/40 , H04N5/20 , H04N5/14
CPC分类号： G06T5/009 , G06T5/40 , H04N5/20
摘要： A video signal gradation corrector used in a television receiver or the like for preventing the destruction of the gradation of the black side and the floating of the luminance level of the black side and/or an excessive increase of the luminance level of the white side. The corrector can be realized with a small circuit scale. A histogram operating circuit includes an average luminance level detecting circuit. A constant is subtracted from an output signal of the average luminance level detecting circuit by a subtracter. The result of subtraction is multiplied by a constant by a constant-multiplication circuit. A lower-limit limiter circuit limits an output signal of the constant-multiplication circuit to a signal having a value not smaller than 0. An output signal of the lower-limit limiter circuit is provided as an accumulation start luminance level, thereby enabling a gradation correction in which the floating of the luminance level of the black side and the destruction of the gradation of the black side are prevented.
摘要翻译：在电视接收机等中使用的视频信号灰度校正器，用于防止黑色侧的灰度的破坏和黑色的亮度级的漂移和/或白色的亮度级的过度增加。校正器可以用小电路规模实现。直方图运算电路包括平均亮度电平检测电路。通过减法器从平均亮度电平检测电路的输出信号中减去常数。减法的结果乘以恒常乘法电路的常数。下限限制器电路将恒倍数电路的输出信号限制为不小于0的信号。下限限制器电路的输出信号被提供为累积开始亮度电平，从而使得能够进行等级防止了黑色的亮度水平的浮动和黑色的灰度的破坏的校正。

3. 发明授权

US07209182B2 False contour correcting apparatus and method 有权
标题翻译：假轮廓修正装置及方法
公开(公告)号：US07209182B2
公开(公告)日：2007-04-24
申请号：US10616990
申请日：2003-07-11
申请人： Minoru Kawabata , Atsuhisa Kageyama , Masahiro Takeshima
发明人： Minoru Kawabata , Atsuhisa Kageyama , Masahiro Takeshima
IPC分类号： H04N5/57
CPC分类号： H04N5/142 , H04N5/208 , H04N5/21 , H04N5/44 , H04N21/4318
摘要： A false contour correcting apparatus is capable of removing a false contour in an image based on a digital image signal while avoiding such a side effect caused by false contour correction where noises negatively effecting the display occur on a screen. Therefore, in the false contour correcting apparatus according, a double bit change detection circuit detects as a double bit change a signal value change which is twice a minimum quantization unit in a digital image signal, and outputs a double bit change detection signal representing the position of the double bit change. A signal correction circuit corrects the double bit change in the digital image signal into two one-bit changes on the basis of the double bit change detection signal. Consequently, a false contour corresponding to a portion where the double bit change exists is removed.
摘要翻译：假轮廓校正装置能够基于数字图像信号去除图像中的假轮廓，同时避免由于其中在屏幕上发生负面影响的噪声而导致的错误轮廓校正引起的这种副作用。因此，在根据双位变化检测电路的双位改变检测电路中，将数字图像信号中的最小量化单位的两倍的信号值变化检测为双位变化检测电路，并输出表示位置的双位变化检测信号的双位变化。信号校正电路基于双位变化检测信号将数字图像信号中的双位变化校正为两个1位变化。因此，与存在双位变化的部分对应的假轮廓被去除。

4. 发明申请

US20060146891A1 Semiconductor device 失效
标题翻译：半导体器件
公开(公告)号：US20060146891A1
公开(公告)日：2006-07-06
申请号：US10541678
申请日：2004-11-19
申请人： Hisao Kunitani , Satoru Tanigawa , Hiroshi Sonobe , Atsuhisa Kageyama
发明人： Hisao Kunitani , Satoru Tanigawa , Hiroshi Sonobe , Atsuhisa Kageyama
IPC分类号： H04J3/06
CPC分类号： H03L7/07 , H03K5/13 , H03K5/1565 , H03L7/0814 , H04N5/126
摘要： In a semiconductor device of the present invention, a clock is not changed instantaneously but it is changed over maximum N+1/M clocks (N: integer not less than 2) by shifting delay cells stepwisely to make the phase state of a previous reference signal and the phase state of a present reference signal coincide with each other, whereby the clock is synchronized with the reference signal with accuracy, and the duty of the output clock is kept constant. According to the semiconductor device of the present invention, it is possible to prevent the duty of the clock from being discontinuous when a signal whose reference signal does not coincide with the clock is inputted and reset is made to a rising edge of this reference signal.
摘要翻译：在本发明的半导体器件中，时钟不瞬时变化，但是通过逐步移动延迟单元，使其在最大N + 1 / M个时钟（N：不小于2的整数）上改变，以使之前的参考的相位状态信号和本参考信号的相位状态彼此一致，从而精确地将时钟与参考信号同步，并且输出时钟的占空比保持恒定。根据本发明的半导体器件，当输入参考信号与时钟不一致的信号时，可以防止时钟的占空比不连续，并且复位到该参考信号的上升沿。

5. 发明授权

US06295095B1 Video signal character converting device and method of the same 失效
标题翻译：视频信号字符转换装置及其方法相同
公开(公告)号：US06295095B1
公开(公告)日：2001-09-25
申请号：US09359597
申请日：1999-07-23
申请人： Minoru Kawabata , Atsuhisa Kageyama
发明人： Minoru Kawabata , Atsuhisa Kageyama
IPC分类号： H04N514
CPC分类号： H04N5/57 , H04N5/44 , H04N21/4318
摘要： In a video signal character converting device, a sampling window signal generator generates a signal for sampling an input video signal “a”. A video scene amplitude discrimination circuit samples the video signal in response to the sampling signal, detects a change in image level either field by field or frame by frame based on an integrated value for every duration of vertical scanning, and outputs a resetting pulse when the change in picture level exceeds a predetermined level. A video scene periodicity discrimination circuit measures a time interval between two successive resetting pulses, and outputs a control signal if the time interval is shorter than a predetermined period. A video scene conversion circuit converts a video scene in response to the control signal. The video signal character detecting device of the present invention determines as to whether or not the input video signal has video images that present an adverse effect mentally and physically to viewers, by observing an image level and periodicity of the video signal in this manner. The device is thus able to output video images by converting them into a harmless level with a process of reducing contrast or blanking, if it determines the video images harmful.
摘要翻译：在视频信号字符转换装置中，采样窗口信号发生器产生用于对输入视频信号“a”进行采样的信号。视频场景振幅鉴别电路响应于采样信号对视频信号进行采样，根据垂直扫描的每个持续时间的积分值逐场或逐帧地检测图像电平的变化，并且当图像水平的变化超过预定水平。视频场景周期性判别电路测量两个连续复位脉冲之间的时间间隔，并且如果时间间隔短于预定周期，则输出控制信号。视频场景转换电路响应于控制信号转换视频场景。本发明的视频信号字符检测装置通过以这种方式观察视频信号的图像级和周期性来确定输入视频信号是否具有对观看者的精神和物理上的不良影响的视频图像。因此，如果确定视频图像有害，则该设备能够通过将它们转换成无害水平，并通过减少对比度或消隐的过程来输出视频图像。

6. 发明授权

US6064447A Pure red color detection circuit and color compensation circuit using the same 失效
标题翻译：纯红色检测电路和色彩补偿电路采用相同
公开(公告)号：US6064447A
公开(公告)日：2000-05-16
申请号：US35684
申请日：1998-03-05
申请人： Hiroko Sugimoto , Atsuhisa Kageyama , Masahiro Takeshima , Minoru Kawabata
发明人： Hiroko Sugimoto , Atsuhisa Kageyama , Masahiro Takeshima , Minoru Kawabata
IPC分类号： H04N9/64 , G09G1/28 , G09G5/02 , H04N9/68
CPC分类号： H04N9/68
摘要： Red color saturation is increased and red color with higher purity can be reproduced by composing: a red color detection circuit 1 for detecting a red color signal having higher purity by inputting color differential signals (R-Y) and (B-Y) modulated by color subcarrier, subtracting the absolute value of the (B-Y) signal from the positive polarity component of the (R-Y) signal and removing the negative part of the subtracted signal; Y signal compensation block including: first gain controller 50b for controlling the output signal amplitude of red color detection circuit 1 and a subtracter 50a for subtracting the output signal of first gain controller 50b from a luminance signal Y; an (R-Y) signal compensation block including: second gain controller 51b for controlling the output signal amplitude of red color detection circuit 1 and an adder 51a for adding the output signal of second gain controller 51b and the input (R-Y) signal; and a (B-Y) signal compensation block including: third gain controller 52b for controlling the output signal amplitude of red color detection circuit 1, a polarity inverter 52c for inverting the output signal polarity of third gain controller 52b, a switch circuit 52d for selecting either input signal or output signal of polarity inverter 52c, a polarity discriminater 52e for discriminating the polarity of the input (B-Y) signal and controlling switch circuit 52d and an adder 52e for adding the output signal of switch circuit 52d and the input (B-Y) signal.
摘要翻译：增加红色饱和度，通过构成红色检测电路1，红色检测电路1，通过输入由彩色副载波调制的色差信号（RY）和（BY）来检测具有较高纯度的红色信号，减去红色，来自（RY）信号的正极性分量的（BY）信号的绝对值，并去除相减信号的负部分; Y信号补偿块包括：用于控制红色检测电路1的输出信号幅度的第一增益控制器50b和用于从亮度信号Y减去第一增益控制器50b的输出信号的减法器50a; （R-Y）信号补偿块，包括：用于控制红色检测电路1的输出信号幅度的第二增益控制器51b和用于将第二增益控制器51b的输出信号和输入（R-Y）信号相加的加法器51a; 和（BY）信号补偿块，包括：用于控制红色检测电路1的输出信号幅度的第三增益控制器52b，用于反转第三增益控制器52b的输出信号极性的极性反相器52c，极性反相器52c的输入信号或输出信号，用于识别输入（BY）信号的极性和控制开关电路52d的极性鉴别器52e和用于将开关电路52d的输出信号和输入（BY）信号相加的加法器52e 。

7. 发明授权

US5262862A Black level compensation circuit for a luminance signal 失效
标题翻译：用于亮度信号的黑电平补偿电路
公开(公告)号：US5262862A
公开(公告)日：1993-11-16
申请号：US732000
申请日：1991-07-18
申请人： Hideaki Sadamatsu , Atsuhisa Kageyama
发明人： Hideaki Sadamatsu , Atsuhisa Kageyama
IPC分类号： H04N5/20 , H04N5/208 , H04N9/73 , H04N5/57
CPC分类号： H04N5/20
摘要： A black compensation circuit for compensating a luminance signal which is subjected to edge enhancement, comprises: a black-level expanding circuit responsive to a control signal including an edge enhancement component and the luminance signal for performing expansion of a tone of a black portion of the luminance signal and for performing conversion of the luminance signal into a black-level expanded signal in the absence of the control signal; a low-pass filter circuit for low-pass filtering the luminance signal to remove the edge enhancement component; a detection circuit responsive to an output of the low-pass filter circuit for detecting the blackest level for a given interval; and a comparing circuit for comparing the blackest level with a given level to produce the control signal, the black-level expanding circuit stopping the expansion and the conversion in the presence of the control signal. The blackest level does not change with sharpness because after the luminance signal subjected to edge enhancement is passed through the low-pass filter, it is sent to the detection circuit. An input signal of the low-pass filter may be supplied from the black-level expanding circuit.

8. 发明授权

US5239378A Gradation corrector with improved smoothing, signal-to-noise ratio and fast response time 失效
标题翻译：具有改进的平滑度，信号噪声比和快速响应时间的分级校正
公开(公告)号：US5239378A
公开(公告)日：1993-08-24
申请号：US838844
申请日：1992-02-21
申请人： Toshiaki Tsuji , Atsuhisa Kageyama
发明人： Toshiaki Tsuji , Atsuhisa Kageyama
IPC分类号： G06T5/40 , H04N5/14 , H04N5/20 , H04N5/21 , H04N5/66
CPC分类号： G06T5/009 , G06T5/40 , H04N19/142 , H04N19/179 , H04N19/87 , H04N5/147 , H04N5/20
摘要： In a gradation corrector used in a television receiver, a clipping circuit is connected to an output of a histogram memory and a clipping level of the clipping circuit is changed in accordance with an output of an S/N detecting circuit. Thereby, when the minimum value is detected, it is possible to prevent a large variation of the value to be detected which may be caused from noises or the like. Also, a circuit for detecting a change in video scene and a recursive filter circuit composed of an adder and a xK circuit (and a two-input/one-output selector circuit are provided on the output side of a clipping circuit and the coefficient value K of the xK circuit (or the selector circuit is controlled in accordance with an output of the video scene change detecting circuit. Thereby, it is possible to make a smooth gradation correction which is not affected by noises or the like (or to make a gradation correction with rapid response which follows a change in video scene.

9. 发明申请

US20080158033A1 DRIVING DEVICE FOR IMAGE DISPLAY SYSTEM 审中-公开
标题翻译：用于图像显示系统的驱动装置
公开(公告)号：US20080158033A1
公开(公告)日：2008-07-03
申请号：US11965279
申请日：2007-12-27
申请人： Yasuyuki Doi , Makoto Hattori , Hisao Kunitani , Atsuhisa Kageyama , Tetsuro Oomori , Osamu Sarai , Tooru Suyama , Kurumi Nakayama , Kazuya Matsumoto
发明人： Yasuyuki Doi , Makoto Hattori , Hisao Kunitani , Atsuhisa Kageyama , Tetsuro Oomori , Osamu Sarai , Tooru Suyama , Kurumi Nakayama , Kazuya Matsumoto
IPC分类号： G09G3/36
CPC分类号： G09G3/3685 , G09G3/2059 , G09G3/3696 , G09G2310/027 , G09G2340/0428
摘要： A driving device for driving an image display system, which sequentially receives input image data corresponding to gradation of each pixel of a display image and outputs a driving voltage signal includes: an operation section for obtaining output image data of which a bit number is smaller than a bit number of the input image data based on input image data of a target pixel to be processed and input image data of a pixel in vicinity of the target pixel; a reference voltage generation section for generating a plurality of reference voltages of different levels; and a reference voltage selection section for selecting one of the plurality of reference voltages. The operation section is configured to obtain output image data of the target pixel so that a difference between the input image data and output image data of the target pixel and a difference between the input image data and output image data of the pixel in vicinity of the target pixel cancel out each other.
摘要翻译：一种用于驱动图像显示系统的驱动装置，其顺序地接收与显示图像的每个像素的灰度对应的输入图像数据并输出驱动电压信号，包括：操作部，用于获得位数小于基于要处理的目标像素的输入图像数据的输入图像数据的位数，并输入目标像素附近的像素的图像数据; 用于产生不同电平的多个参考电压的参考电压产生部分; 以及用于选择多个参考电压中的一个的参考电压选择部分。操作部被配置为获得目标像素的输出图像数据，使得输入图像数据和目标像素的输出图像数据之间的差异以及输入图像数据与输入图像数据之间的像素的输出图像数据之间的差异目标像素相互抵消。

10. 发明授权

US06636229B2 Gradation correction circuit, and &ggr; correction apparatus 失效
标题翻译：梯度校正电路和伽马校正装置
公开(公告)号：US06636229B2
公开(公告)日：2003-10-21
申请号：US09801872
申请日：2001-03-09
申请人： Katsuya Ishikawa , Atsuhisa Kageyama , Keiichi Ito
发明人： Katsuya Ishikawa , Atsuhisa Kageyama , Keiichi Ito
IPC分类号： G09G502
CPC分类号： H04N5/202 , G09G3/20 , G09G2320/0673 , G09G2360/16 , H04N9/69
摘要： A gradation correction circuit comprises: an arithmetic means (101˜104, 106, 108˜110) for operating an output value corresponding to each broken point of a broken line in a vertical blanking period; a level detection circuit 107 for identifying a size relation between each broken line point which is an input value corresponding to each broken point and an input video signal, and calculating a difference between the input video signal and each broken line point; and a correction means (101˜102, 104, 107, 109˜111) for selecting a gradient of the broken line on the basis of the result identified by the level detection circuit 107, and performing gradation correction of the input video signal on the basis of the selected gradient of the broken line, the output value calculated by the arithmetic means, and the difference calculated by the level detection circuit, wherein the arithmetic means and the correction means share a number of circuits (102, 109, 110). Therefore, there is provided a gradation correction circuit where video correction with high precision can be realized without using a memory storing a lookup table, or without increasing a circuit scale.
摘要翻译：灰度校正电路包括：用于在垂直消隐期间操作对应于虚线的每个断点的输出值的算术装置（101〜104,106,108〜110）电平检测电路107，用于识别作为与每个断点相对应的输入值的每个虚线点与输入视频信号之间的尺寸关系，并计算输入视频信号和每个虚线点之间的差; 以及用于根据由电平检测电路107识别的结果来选择虚线的梯度的校正装置（101〜102,104,107,109〜111），并对输入视频信号进行灰度校正基于所选择的虚线的斜率，由算术装置计算的输出值以及由电平检测电路计算出的差值，其中算术装置和校正装置共享多个电路（102,109,110）。因此，提供了一种灰度校正电路，其中可以在不使用存储查找表的存储器的情况下实现高精度的视频校正，或者不增加电路规模。

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