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1. 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。

2. 发明授权

US06633343B2 Dynamic gamma correction apparatus 失效
标题翻译：动态伽马校正装置
公开(公告)号：US06633343B2
公开(公告)日：2003-10-14
申请号：US09803660
申请日：2001-03-12
申请人： Keiichi Ito , Atsuhisa Kageyama , Nobutaka Okada , Katsuya Ishikawa , Hidetoshi Suzuki , Hisao Kunitani , Yuki Kakuya
发明人： Keiichi Ito , Atsuhisa Kageyama , Nobutaka Okada , Katsuya Ishikawa , Hidetoshi Suzuki , Hisao Kunitani , Yuki Kakuya
IPC分类号： H04N5202
CPC分类号： H04N5/202
摘要： An appropriate correction quantity is obtained for a video luminance signal on an individual video basis with a characteristic value, like the maximum or average value, of the luminance signal taken into account, thereby performing gray scale correction more effectively. A dynamic gamma correction apparatus for performing a correction on a video luminance signal includes: a correction start point control section for obtaining a correction start point, which is a lower limit of a given correction range, in accordance with a characteristic value of the luminance signal; a gamma correction quantity calculating section for obtaining a provisional correction quantity for the luminance signal to be corrected using the correction start point and the luminance signal; a gamma correction gain control section for obtaining a gain for the provisional correction quantity in accordance with the characteristic value of the luminance signal; a multiplier for obtaining a product of the provisional correction quantity and the gain as a gamma correction quantity; and an adder for obtaining a sum of the luminance signal and the gamma correction quantity and outputting the sum. The correction start point and the gain for the provisional correction quantity are controllable in accordance with the characteristic value of the luminance signal. Thus, an appropriate gamma correction quantity can be obtained as a final correction quantity.
摘要翻译：通过考虑到亮度信号的特性值（如最大值或平均值），在单个视频基础上获得适当的校正量，从而更有效地执行灰度校正。用于对视频亮度信号执行校正的动态伽马校正装置包括：校正开始点控制部分，用于根据亮度信号的特征值获得作为给定校正范围的下限的校正开始点 ; 伽马校正量计算部分，用于使用校正开始点和亮度信号获得要校正的亮度信号的临时校正量; 伽马校正增益控制部分，用于根据亮度信号的特征值获得临时校正量的增益; 用于获得临时校正量和增益的乘积作为伽马校正量的乘法器; 以及用于获得亮度信号和伽马校正量之和并输出该和的加法器。校正开始点和临时校正量的增益根据亮度信号的特征值是可控的。因此，可以获得适当的伽马校正量作为最终校正量

3. 发明授权

US07113227B1 Gradation correcting apparatus gradation correcting method and video display apparatus 有权
标题翻译：梯度校正装置灰度校正方法和视频显示装置
公开(公告)号：US07113227B1
公开(公告)日：2006-09-26
申请号：US10129541
申请日：2000-11-24
申请人： Yuki Kakuya , Atsuhisa Kageyama , Katsuya Ishikawa , Hidetoshi Suzuki
发明人： Yuki Kakuya , Atsuhisa Kageyama , Katsuya Ishikawa , Hidetoshi Suzuki
IPC分类号： H04N5/14 , H04N5/20 , H04N5/52 , H04N9/64 , H04N9/69 , H04N9/77 , G06K9/00 , G03F3/08
CPC分类号： H04N5/20 , G09G5/10
摘要： The present invention has an object to provide a gradation correcting apparatus for correcting the gradation of the white side of a video luminance signal.The gradation correcting apparatus is provided with a maximum value detector 101 for detecting a maximum value of a luminance signal S101, a white comparator 102 for comparing the luminance signal S101, a maximum luminance value S111 detected by the maximum value detector 101, and a first white threshold value S103, a white linear converter 103 for performing linear conversion on the luminance signal S101 on the basis of the maximum luminance value S111, the first white threshold value S103, and a second white threshold value S104, and a white controller 104 for correcting the luminance signal S101 on the basis of the result of the comparison in the white comparator 102, the output of the white linear converter 103, and the second white threshold value S104.
摘要翻译：本发明的目的是提供一种用于校正视频亮度信号的白色侧的灰度的灰度校正装置。灰度校正装置设置有用于检测亮度信号S 101的最大值的最大值检测器101，用于比较亮度信号S 101的白色比较器102，由最大值检测器101检测的最大亮度值S111，和第一白色阈值S103，用于基于最大亮度值S 111，第一白色阈值S 103和第二白色阈值S，对亮度信号S 101进行线性转换的白色线性转换器103 以及白色控制器104，用于根据白色比较器102中的比较结果，白色线性转换器103的输出和第二白色阈值S 104来校正亮度信号S 101。

4. 发明授权

US06580464B1 Color difference signal correction apparatus 有权
标题翻译：色差信号校正装置
公开(公告)号：US06580464B1
公开(公告)日：2003-06-17
申请号：US09721873
申请日：2000-11-27
申请人： Hisao Kunitani , Atsuhisa Kageyama , Katsuya Ishikawa
发明人： Hisao Kunitani , Atsuhisa Kageyama , Katsuya Ishikawa
IPC分类号： H04N973
CPC分类号： H04N9/73
摘要： The present invention provides a color difference signal correction apparatus for correcting color difference of parts having no color, particularly white characters, which can make the correction with high accuracy also for images including lightly colored parts. The color difference signal correction apparatus of the present invention comprises a full-wave rectification circuit 12 for full-wave rectifying an input color difference signal (R−Y)a, a full-wave rectification circuit 13 for full-wave rectifying an input color difference signal (B−Y)b, an addition circuit 14 for adding the outputs of the full-wave rectification circuit 12 and the full-wave rectification circuit 13, an addition circuit 4 for adding a white character slice level signal e and the output of the addition circuit 14, a luminance signal slice circuit 5 for slicing a luminance signal g with the output of the addition circuit 4, and an addition circuit 6 for adding the output of the luminance signal slice circuit 5 and the input color difference signal (B−Y)b and outputting the addition result.
摘要翻译：本发明提供了一种色差信号校正装置，用于校正没有颜色，特别是白色字符的部分的色差，其可以对包括浅色部分的图像进行高精度的校正。本发明的色差信号校正装置包括用于全波整流输入色差信号（RY）a的全波整流电路12，全波整流电路13，用于全波整流输入色差信号（BY）b，用于将全波整流电路12和全波整流电路13的输出相加的加法电路14，用于将白字符限幅电平信号e和加法电路的输出相加的加法电路4 14是用于对加法电路4的输出对亮度信号g进行分片的亮度信号限制电路5，以及用于将亮度信号限幅电路5的输出和输入色差信号（BY）b相加的加法电路6和输出加法结果。

5. 发明授权

US06967692B1 Apparatus for processing luminance signal 失效
标题翻译：用于处理亮度信号的装置
公开(公告)号：US06967692B1
公开(公告)日：2005-11-22
申请号：US10130624
申请日：2000-11-24
申请人： Yuki Kakuya , Atsuhisa Kageyama , Nobutaka Okada , Keiichi Ito
发明人： Yuki Kakuya , Atsuhisa Kageyama , Nobutaka Okada , Keiichi Ito
IPC分类号： G09G5/10 , H04N5/20 , H04N5/46 , H04N5/57 , H04N9/77 , H04N5/14 , H04N9/64
CPC分类号： G09G5/10 , H04N5/20 , H04N5/46 , H04N5/57 , H04N21/44008
摘要： A luminance signal processing apparatus that detects an average luminance level, adaptively to various video signal formats. This luminance signal processing apparatus includes a window pulse generation unit 101 for generating a window pulse signal S110 that indicates a period during which a luminance signal of an input video signal is sampled; a luminance value addition unit 102 for obtaining a total sum of luminance values of the luminance signal in the period indicated by the window pulse signal S110; a number-of-pixel addition unit 103 for obtaining the number of pixels in the period indicated by the window pulse signal S110; a bit shift unit 104 for bit-shifting an output signal of the luminance value addition unit 102 and an output signal of the number-of-pixel addition unit 103, respectively; and a division unit 105 for dividing the bit-shifted output signal of the luminance value addition unit 102 by the bit-shifted output signal of the number-of-pixel addition unit 103, thereby obtaining an average luminance level.
摘要翻译：一种自适应地检测各种视频信号格式的平均亮度级的亮度信号处理装置。该亮度信号处理装置包括窗口脉冲产生单元101，用于产生指示输入视频信号的亮度信号被采样的周期的窗口脉冲信号S110; 亮度值相加单元102，用于获得由窗口脉冲信号S110指示的时段中的亮度信号的亮度值的总和; 用于获得由窗口脉冲信号S110指示的周期中的像素数量的像素数加法单元103; 位移单元104，用于分别对亮度值相加单元102的输出信号和像素数加法单元103的输出信号进行位移位; 以及分割单元105，用于将亮度值相加单元102的位移输出信号除以像素数加法单元103的位移输出信号，从而获得平均亮度级。

6. 发明授权

US07034896B2 Gradation correction apparatus 失效
标题翻译：梯度校正装置
公开(公告)号：US07034896B2
公开(公告)日：2006-04-25
申请号：US10343512
申请日：2002-05-30
申请人： Keiichi Ito , Atsuhisa Kageyama
发明人： Keiichi Ito , Atsuhisa Kageyama
IPC分类号： H04N9/69
CPC分类号： H04N5/202 , G06T5/009 , G09G2320/0276 , H04N5/20
摘要： The present invention provides a gradation correction device which can perform gradation correction using digital feedback processing, and furthermore, can control the digital feedback processing with high accuracy. The gradation correction device is provided with a correction gain adjustable amount generation circuit (103) and a correction gain generation circuit (104), and the correction gain adjustable amount generation circuit (103) obtains a correction gain adjustable amount which is non-linear in relation to a difference S between a reference luminance level Yb1 and a maximum luminance level, and greater gamma correction is carried out as the value of the difference is larger.
摘要翻译：本发明提供了一种可以使用数字反馈处理执行灰度校正的灰度校正装置，并且可以高精度地控制数字反馈处理。灰度校正装置具有校正增益可调量生成电路（103）和校正增益生成电路（104），校正增益可调量生成电路（103）获得非线性的校正增益可调量与基准亮度电平Yb 1和最大亮度电平之间的差S的关系以及较大的伽马校正被执行，因为差值越大。

7. 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。

8. 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。

9. 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。

10. 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 。

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