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公开(公告)号：US5745001A
公开(公告)日：1998-04-28
申请号：US807000
申请日：1997-02-26
CPC分类号： H03H11/1291
摘要： An active filter apparatus makes it possible for a filter adjusting circuit to require a small number of elements when the filter adjusting circuit is contained in an integrated circuit, to be not easily affected by variations in the characteristics of the elements which form the circuit, and to be capable of easily adjusting the frequency characteristics of the filter to be adjusted. A characteristics conversion device converts, on the basis of an input signal and an output signal of the filter, to a characteristics conversion signal whose amplitude when the adjustment is completed is considerably larger than that of the output signal. As a result, the amplification factor of the characteristics conversion device, necessary to detect a maximum or minimum value of a characteristics conversion signal, is considerably small. Therefore, it is possible to considerably decrease an offset error of the characteristics conversion device.
摘要翻译： 有源滤波器装置使滤波器调节电路在滤波器调节电路被包含在集成电路中时需要少量的元件，不容易受到形成电路的元件的特性变化的影响;以及 能够容易地调节要调节的过滤器的频率特性。 特性转换装置基于滤波器的输入信号和输出信号，将其调整完成时的振幅大大地大于输出信号的特性转换信号。 因此，检测特性转换信号的最大值或最小值所必需的特性转换装置的放大系数相当小。 因此，可以显着地减小特性转换装置的偏移误差。
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2.发明授权Device and method for processing video signals to improve the black contrast 失效用于处理视频信号以提高黑色对比度的装置和方法公开(公告)号：US07502077B2
公开(公告)日：2009-03-10
申请号：US10517583
申请日：2003-06-24
申请人： Satoshi Miura , Takatomo Nagamine , Yumiko Mito , Jun Ueshima
发明人： Satoshi Miura , Takatomo Nagamine , Yumiko Mito , Jun Ueshima
CPC分类号： H04N5/20
摘要： A video signal-processing device that can improve the apparent contrast of the luminance signal at a television receiving set includes a quantity of black expansion computing section for computationally determining the quantity of black expansion when the luminance component of the input video signal is not higher than a first luminance level, a gain controller for regulating the quantity of black expansion as computationally determined by the quantity of black expansion computing section, a quantity of black expansion adding section for generating an output video signal by adding the quantity of black expansion regulated by the gain controller to the luminance component of the input video signal, and a vertical span adding block for integrating the luminance component of the output video signal not higher than a second luminance level for a field. The gain controller regulates the quantity of black expansion according to the luminance component integrated by the vertical span adding block to improve the apparent contrast of the luminance signal at the television receiving set by accurately expanding black.
摘要翻译： 可以提高电视接收装置的亮度信号的视觉对比度的视频信号处理装置包括黑色扩展计算部分，用于当输入视频信号的亮度分量不高于时，用于计算确定黑色扩展量 第一亮度级，由黑色扩展计算部的数量计算的用于调节黑色扩展量的增益控制器，黑色扩展添加部，用于通过将由黑色扩展计算部调整的黑色扩展量相加生成输出视频信号的量; 对于输入视频信号的亮度分量的增益控制器和用于对不高于场的第二亮度水平的输出视频信号的亮度分量进行积分的垂直量程相加块。 增益控制器根据由垂直量程相加块积分的亮度分量来调节黑色扩展量，以通过精确地扩展黑色来改善电视接收机上的亮度信号的视差对比度。
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公开(公告)号：US20050157212A1
公开(公告)日：2005-07-21
申请号：US10517583
申请日：2003-06-24
申请人： Satoshi Miura , Takatomo Nagamine , Yumiko Mito , Jun Ueshima
发明人： Satoshi Miura , Takatomo Nagamine , Yumiko Mito , Jun Ueshima
CPC分类号： H04N5/20
摘要： A video signal-processing device that can improve the apparent contrast of the luminance signal at a television receiving set includes a quantity of black expansion computing section for computationally determining the quantity of black expansion when the luminance component of the input video signal is not higher than a first luminance level, a gain controller for regulating the quantity of black expansion as computationally determined by the quantity of black expansion computing section, a quantity of black expansion adding section for generating an output video signal by adding the quantity of black expansion regulated by the gain controller to the luminance component of the input video signals and a vertical span adding block for integrating the luminance component of the output video signal not higher than a second luminance level for a field. The gain controller regulates the quantity of black expansion according to the luminance component integrated by the vertical span adding block to improve the apparent contrast of the luminance signal at the television receiving set by accurately expanding black.
摘要翻译： 可以提高电视接收装置的亮度信号的视觉对比度的视频信号处理装置包括黑色扩展计算部分，用于当输入视频信号的亮度分量不高于时，用于计算确定黑色扩展量 第一亮度级，由黑色扩展计算部的数量计算的用于调节黑色扩展量的增益控制器，黑色扩展添加部，用于通过将由黑色扩展计算部调整的黑色扩展量相加生成输出视频信号的量; 对于输入视频信号的亮度分量的增益控制器和用于对不高于场的第二亮度水平的输出视频信号的亮度分量进行积分的垂直量程相加块。 增益控制器根据由垂直量程相加块积分的亮度分量来调节黑色扩展量，以通过精确地扩展黑色来改善电视接收机上的亮度信号的视差对比度。
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公开(公告)号：US07355653B2
公开(公告)日：2008-04-08
申请号：US10511733
申请日：2004-02-09
申请人： Takatomo Nagamine , Takahiko Tamura , Jun Ueshima
发明人： Takatomo Nagamine , Takahiko Tamura , Jun Ueshima
IPC分类号： H03L7/00
摘要： When an A/D-converted composite video signal is directly outputted while a system clock frequency is switched so as to execute the determination of a signal system, a digital chroma demodulation system prevents the images displayed by the composite video signals from being distorted in accordance with a switching of the frequency of a system clock. The frequency m (=fsc×n) of the system clock is synchronized with a color burst signal and is set to fall in a predetermined range by changing a coefficient n in accordance with the system color burst signal freguency. Thus, since a composite video signal is A/D-converted in accordance with a substantially constant sampling frequency, the sampling condition such as a sampling frequency and a sampling point is not greatly changed.
摘要翻译： 当在切换系统时钟频率的同时直接输出A / D转换的复合视频信号以便执行信号系统的确定时，数字色度解调系统防止由复合视频信号显示的图像根据 随着系统时钟频率的切换。 系统时钟的频率m（= fscxn）与色同步信号同步，并且通过根据系统色同步信号频率改变系数n而被设置为落在预定范围内。 因此，由于复合视频信号根据基本恒定的采样频率进行A / D转换，所以采样频率和采样点等采样条件不会发生很大变化。
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公开(公告)号：US5909258A
公开(公告)日：1999-06-01
申请号：US654206
申请日：1996-05-28
申请人： Akira Shirahama , Takahiko Tamura , Jun Ueshima
发明人： Akira Shirahama , Takahiko Tamura , Jun Ueshima
CPC分类号： H04N3/2335
摘要： In a CRT display and a television set having the same, horizontal/vertical synchronizing signals are separated from a video synchronizing signal in a synchronizing separation circuit, and position information S of a vertical frame is generated on the basis of the horizontal/vertical synchronizing signals in a count-down processor and then converted to corrected vertical frame information W in a function circuit to output a vertical deflection waveform signal and a horizontal deflection correcting waveform signal. Further, the corrected vertical frame information W is compared with predetermined voltages in comparators to detect an effective frame range in the vertical direction.
摘要翻译： 在具有相同的CRT显示器和电视机中，水平/垂直同步信号与同步分离电路中的视频同步信号分离，并且基于水平/垂直同步信号产生垂直帧的位置信息S 在倒计数处理器中，然后在功能电路中转换为校正的垂直帧信息W，以输出垂直偏转波形信号和水平偏转校正波形信号。 此外，将校正的垂直帧信息W与比较器中的预定电压进行比较，以检测垂直方向上的有效帧范围。
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公开(公告)号：US5146108A
公开(公告)日：1992-09-08
申请号：US754570
申请日：1991-09-04
申请人： Takahiko Tamura , Jun Ueshima
发明人： Takahiko Tamura , Jun Ueshima
CPC分类号： H03K4/04
摘要： A parabolic wave generator in a color television receiver or the like wherein, when the amplitude level of an input sawtooth wave is higher than the center level thereof, squared currents of mutually reverse polarities obtained by squaring the difference current proportional to the difference voltage between the two levels are added to each other at a predetermined rate, so that one side portion of a nonsymmetrical parabolic wave is produced. Meanwhile, when the amplitude level of the input sawtooth wave is lower than the center level thereof, squared currents of mutually reverse polarities obtained by squaring the difference current proportional to the difference voltage between the two levels are added to each other at another predetermined rate to thereby produce the other portion of the parabolic wave. Consequently it becomes possible to generate the two side portions of mutually different waveforms. And a desired nonsymmetrical parabolic wave can be achieved by combining such two side portions with each other through addition of the currents thereof without raising any problem in regard of the discontinuity or level difference that may otherwise be caused in the vicinity of the peak of the parabolic wave.
摘要翻译： 在彩色电视接收机等中的抛物线波发生器，其中当输入锯齿波的振幅电平高于其中心电平时，通过将与差值电压成正比的差分电流平方得到的相反极性的平方电流 以预定的速率相互添加两个电平，从而产生非对称抛物线波的一个侧面部分。 同时，当输入锯齿波的振幅电平低于其中心电平时，通过将与两个电平之间的差分电压成比例的差分电流平方获得的相反极性的平方电流以另一预定速率彼此相加，以 从而产生抛物线波的另一部分。 因此，可以产生相互不同波形的两个侧面部分。 并且可以通过将这两个侧面部分彼此组合来实现期望的非对称抛物线波，而不会在抛物线的峰值附近引起的不连续性或电平差异引起任何问题 波。
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