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41. 发明授权

US06492921B1 Device for clamping multiple signals 有权
标题翻译：用于钳位多个信号的装置
公开(公告)号：US06492921B1
公开(公告)日：2002-12-10
申请号：US09856874
申请日：2001-05-29
申请人： Hisao Kunitani , Atsuhisa Kageyama
发明人： Hisao Kunitani , Atsuhisa Kageyama
IPC分类号： H03M110
CPC分类号： H03M1/1295 , H03M1/1225 , H04N5/18 , H04N5/185
摘要： A large number of analog signals (Aa, Ba . . . Na) are time-division-multiplexed by an analog switch (12) into a single analog signal (c). The multiplexed analog signal (c) is converted by an A/D conversion circuit (8) into a digital signal (d). The digital signal (d) is separated by a signal separation circuit (14) into a large number of digital signals (e) respectively corresponding to the analog signals (Aa, Ba . . . Na). Each digital signal (e) is compared by a comparison circuit (9) with a digital reference value (f) having a predetermined value. A current source control circuit (10) generates a digital control signal (g) according to the amount of shift in the digital signal (e) with respect to the digital reference value (f), and the current source (11) is controlled by the control signal (g). Therefore, the clamp level of an analog signal is adjusted to a predetermined level with a high precision, thereby effectively suppressing the level shift thereof.
摘要翻译：大量模拟信号（Aa，Ba ... Na）被模拟开关（12）进行时分复用为单个模拟信号（c）。复用的模拟信号（c）由A / D转换电路（8）转换成数字信号（d）。数字信号（d）被信号分离电路（14）分离成分别对应于模拟信号（Aa，Ba，...，Na）的大量数字信号（e）。每个数字信号（e）通过比较电路（9）与具有预定值的数字参考值（f）进行比较。电流源控制电路（10）根据数字信号（e）相对于数字参考值（f）的偏移量产生数字控制信号（g），并且电流源（11）由控制信号（g）。因此，模拟信号的钳位电平以高精度被调整到预定电平，从而有效地抑制了模拟信号的电平偏移。

42. 发明授权

US06215529B1 Gamma compensation apparatus 失效
标题翻译：伽玛补偿装置
公开(公告)号：US06215529B1
公开(公告)日：2001-04-10
申请号：US09035695
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： H04N5202
CPC分类号： H04N9/68 , H04N9/69
摘要： Aiming to improve color reproducibility of a red part having high color saturation, a gamma compensation apparatus of the present invention is composed of a bending point setting block 100a and a gamma compensation block 101a and bending point setting block 100a is composed of a high APL detection circuit 1a inputting an average picture level of an input luminance signal and for detecting and taking out a signal component higher than a designated level; a gain controller 2a for gain controlling the detected signal at the high APL picture detection circuit; and an adder 3a for adding a designated offset to the output of gain controller 2a, and gamma compensation block 101a is composed of a slice circuit 4a inputting a color difference signal (R-Y) and the output of bending point setting block 100a and taking out a color difference signal component higher than the output signal level of bending point setting block 100a; a gain controller 5a for adjusting the output level of slice circuit 4a; and a subtracter 6a for subtracting the output of gain controller 5a from the input color difference signal (R-Y) and outputting a gamma compensated color difference signal (R-Y)′.
摘要翻译：为了提高具有高色饱和度的红色部分的色彩再现性，本发明的伽马补偿装置由弯曲点设定块100a和伽马补偿块101a构成，弯曲点设定块100a由高APL检测电路1a输入输入亮度信号的平均图像电平，并且用于检测和取出高于指定电平的信号分量; 增益控制器2a，用于对高APL画面检测电路的检测信号进行增益控制; 以及加法器3a，用于将指定的偏移量与增益控制器2a的输出相加，伽马补偿块101a由输入色差信号（RY）的切片电路4a和弯曲点设定块100a的输出构成，色差信号分量高于弯曲点设定块100a的输出信号电平; 用于调节切片电路4a的输出电平的增益控制器5a; 以及用于从输入色差信号（R-Y）中减去增益控制器5a的输出并输出伽马补偿色差信号（R-Y）'的减法器6a。

43. 发明授权

US5969771A 2-line YC separation device 失效
标题翻译： 2线YC分离装置
公开(公告)号：US5969771A
公开(公告)日：1999-10-19
申请号：US961611
申请日：1997-10-31
申请人： Hiroko Sugimoto , Atsuhisa Kageyama
发明人： Hiroko Sugimoto , Atsuhisa Kageyama
IPC分类号： H04N9/78 , H04N9/77
CPC分类号： H04N9/78
摘要： A 2-line YC separation device comprising a delay circuit for delaying a composite input video signal for a horizontal scanning period; a first band-pass filter which receives the composite input video signal; a second band-pass filter which receives the output signal of the delay circuit; a Y-correlation detector which receives the output signal of the band-pass filter; a C-correlation detector which receives the output signal of the band-pass filter; a difference detector for detecting a Y signal differential value; a YL-correlation detector for detecting a Y signal correlation; and an AND circuit for logically ANDing the output signals of the YL-correlation detector and the Y-correlation detector.
摘要翻译： 2行YC分离装置，包括用于在水平扫描期间延迟复合输入视频信号的延迟电路; 接收复合输入视频信号的第一带通滤波器; 接收延迟电路的输出信号的第二带通滤波器; Y相关检测器，其接收带通滤波器的输出信号; 接收带通滤波器的输出信号的C相关检测器; 用于检测Y信号差分值的差分检测器; 用于检测Y信号相关的YL相关检测器; 以及AND电路，用于对YL相关检测器和Y相关检测器的输出信号进行逻辑与运算。

44. 发明授权

US5416533A Apparatus for correcting a black level of a video signal 失效
标题翻译：用于校正视频信号的黑电平的装置
公开(公告)号：US5416533A
公开(公告)日：1995-05-16
申请号：US898366
申请日：1992-06-15
申请人： Atsuhisa Kageyama
发明人： Atsuhisa Kageyama
IPC分类号： H04N5/20 , H04N5/57 , H04N9/68 , H04N9/72 , H04N5/16
CPC分类号： H04N9/72 , H04N9/68
摘要： A pedestal clamping device clamps a pedestal level of an input video signal in response to a predetermined pedestal voltage, and converts the input video signal into a clamped video signal. A black-level expanding device expands a tone of a black portion of the clamped video signal, and converts the clamped video signal into a black-level expanded video signal. A color greatest detecting device detects a greatest of color signals of the input video signal. A adding device adds an output signal from the color greatest detecting device and the pedestal voltage. A black-level comparing device detects a blackest portion of the black-level expanded video signal; compares the detected blackest portion of the black-level expanded video signal with the output signal from the adding device; and controls a degree of expanding the black tone by the black-level expanding device in response to a difference between the detected blackest portion of the black-level expanded video signal and the output signal from the adding device.
摘要翻译：基座夹紧装置响应于预定的基座电压来钳位输入视频信号的基座电平，并将输入的视频信号转换为钳位的视频信号。黑电平扩展装置扩展被钳位的视频信号的黑色部分的色调，并将钳位的视频信号转换成黑电平扩展的视频信号。色彩最大的检测装置检测输入视频信号的最大颜色信号。添加装置添加来自最色彩检测装置的输出信号和基座电压。黑电平比较装置检测黑电平扩展视频信号的最黑色部分; 将黑电平扩展视频信号的检测到的最黑色部分与来自加法装置的输出信号进行比较; 并且响应于所检测到的黑电平扩展视频信号的最黑色部分与来自加法装置的输出信号之间的差异，控制由黑电平扩展装置扩展黑色音调的程度。

45. 发明授权

US5294986A Video signal gradation corrector which prevents excessive extension of the dynamic range 失效
标题翻译：视频信号灰度校正器防止动态范围的过度扩展
公开(公告)号：US5294986A
公开(公告)日：1994-03-15
申请号：US886927
申请日：1992-05-22
申请人： Toshiaki Tsuji , Atsuhisa Kageyama
发明人： Toshiaki Tsuji , Atsuhisa Kageyama
IPC分类号： G06T5/40 , H04N1/407 , H04N5/20 , H04N5/14
CPC分类号： G06F17/18 , G06T5/009 , G06T5/40 , H04N1/4074 , H04N5/20
摘要： A gradation corrector for use in a television receiver which can subject a signal at any luminance level to non-linear correction to provide optimum image quality. Memory stores therein luminance histogram of an input signal. On the basis of the data, a circuit detects a total frequency, a circuit detects luminance distribution, and a circuit detects the expanse of the luminance distribution. A circuit calculates a fixed value to be added. Further, a circuit detects a minimum luminance level, and a circuit detects an average luminance level. A circuit calculates an accumulation starting point and a circuit calculates an accumulation stopping point. An adder adds the calculated fixed value to the data in the memory. A circuit accumulates the results in the range from the accumulation starting point to the accumulation stopping point. The accumulation result is stored in memory. A circuit detects the maximum cumulative value, and a circuit normalizes all the data stored in the memory by use of this maximum value. The normalized data are stored in a memory. Thus, the input signal is subjected to optimum normalization by use of the normalized data.
摘要翻译：一种用于电视接收机中的灰度校正器，其能够将任何亮度级的信号进行非线性校正，以提供最佳图像质量。存储器存储输入信号的亮度直方图。基于数据，电路检测总频率，电路检测亮度分布，并且电路检测亮度分布的扩展。电路计算要添加的固定值。此外，电路检测最小亮度电平，电路检测平均亮度电平。电路计算累积起点，电路计算累积停止点。加法器将计算的固定值与存储器中的数据相加。电路将结果积聚在从累积起点到累积停止点的范围内。累积结果存储在内存中。电路检测最大累计值，并且电路通过使用该最大值来规范存储在存储器中的所有数据。归一化数据存储在存储器中。因此，通过使用归一化数据对输入信号进行最佳归一化。

46. 发明授权

US5223927A Image signal average picture level detecting apparatus 失效
标题翻译：图像信号平均图像检测装置
公开(公告)号：US5223927A
公开(公告)日：1993-06-29
申请号：US728245
申请日：1991-07-10
申请人： Atsuhisa Kageyama , Hideaki Sadamatsu
发明人： Atsuhisa Kageyama , Hideaki Sadamatsu
IPC分类号： H04N5/14
CPC分类号： H04N5/14
摘要： The average picture level (APL) of a video luminance signal is detected, wherein the output of a first current mirror circuit used as the load of a differential amplifying circuit is fed into a smoothing circuit via a second current mirror circuit. The direct current voltage of the output and the detection voltage amplitude may be optionally set without causing an offset voltage in the output average picture level voltage, with the current flowing through the second current mirror circuit being made zero at the time of APL=0%.

47. 发明授权

US5212545A Apparatus for correcting a black level of a video signal 失效
标题翻译：用于校正视频信号的黑色电平的装置
公开(公告)号：US5212545A
公开(公告)日：1993-05-18
申请号：US708141
申请日：1991-05-30
申请人： Atsuhisa Kageyama
发明人： Atsuhisa Kageyama
IPC分类号： H04N5/20 , H04N5/57 , H04N9/68 , H04N9/72
CPC分类号： H04N9/72 , H04N9/68
摘要： A pedestal clamping device clamps a pedestal level of an input video signal in response to a predetermined pedestal voltage, and converts the input video signal into a clamped video signal. A black-level expanding device expands a tone of a black portion of the clamped video signal, and converts the clamped video signal into a black-level expanded video signal. A color greatest detecting device detects a greatest of color signals of the input video signal. A adding device adds an output signal from the color greatest detecting device and the pedestal voltage. A black-level comparing device detects a blackest portion of the black-level expanded video signal; compares the detected blackest portion of the black-level expanded video signal with the output signal from the adding device; and controls a degree of expanding the black tone by the black-level expanding device in response to a difference between the detected blackest portion of the black-level expanded video signal and the output signal from the adding device.
摘要翻译：基座夹紧装置响应于预定的基座电压来钳位输入视频信号的基座电平，并将输入的视频信号转换为钳位的视频信号。黑电平扩展装置扩展被钳位的视频信号的黑色部分的色调，并将钳位的视频信号转换成黑电平扩展的视频信号。色彩最大的检测装置检测输入视频信号的最大颜色信号。添加装置添加来自最色彩检测装置的输出信号和基座电压。黑电平比较装置检测黑电平扩展视频信号的最黑色部分; 将黑电平扩展视频信号的检测到的最黑色部分与来自加法装置的输出信号进行比较; 并且响应于所检测到的黑电平扩展视频信号的最黑色部分与来自加法装置的输出信号之间的差异，控制由黑电平扩展装置扩展黑色音调的程度。

48. 发明授权

US5196937A Contrast correction device for correcting video signal contrast by varying luminance signal 失效
标题翻译：通过改变发光信号校正视频信号对比度的对比度校正装置
公开(公告)号：US5196937A
公开(公告)日：1993-03-23
申请号：US707003
申请日：1991-05-29
申请人： Atsuhisa Kageyama
发明人： Atsuhisa Kageyama
IPC分类号： H04N5/202 , H04N5/20 , H04N5/57
CPC分类号： H04N5/20 , H04N5/57
摘要： A contrast correction device for correcting a contrast of an image formed by video signals includes a brightness/darkness detecting circuit for detecting a tone level of the image and for producing a bright signal when the tone level is greater than a predetermined brightness, and a dark signal when the tone level is less than a predetermined darkness. A correction circuit is provided for correcting a luminance signal by a negative gamma correction in response to the bright signal, and a positive gamma correction in response to the dark signal. Thus, the contrast of bright areas in the image are enhanced when the bright signal is produced, and the contrast of bright areas in the image are suppressed when the dark signal is produced.

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