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1. 发明授权

US4951137A Image track display apparatus 失效
标题翻译：图像轨迹显示装置
公开(公告)号：US4951137A
公开(公告)日：1990-08-21
申请号：US331319
申请日：1989-03-31
申请人： Masaaki Kisou , Kenji Shimoda , Kazumasa Ikeda , Shinji Yoda , Hisaharu Takeuchi
发明人： Masaaki Kisou , Kenji Shimoda , Kazumasa Ikeda , Shinji Yoda , Hisaharu Takeuchi
IPC分类号： H04N5/21
CPC分类号： H04N5/21
摘要： Image track display apparatus including a memory for delaying an image signal by at least one vertical scanning period, a first subtraction circuit for taking a first difference signal between the image signal and its delayed image signal through the memory. The first difference signal includes first and second polarity components, a non-linear processing circuit for multiplying the one polarity component of the first difference signal by K times (0
摘要翻译：图像轨迹显示装置，包括用于将图像信号延迟至少一个垂直扫描周期的存储器，第一减法电路，用于通过存储器获取图像信号和其延迟图像信号之间的第一差分信号。第一差分信号包括第一和第二极性分量，用于将第一差分信号的一个极性分量乘以K倍（0

2. 发明授权

US4928165A Noise reduction circuit for a chrominance signal of a using frame correlation 失效
标题翻译：降噪电路，用于使用帧相关的色度信号
公开(公告)号：US4928165A
公开(公告)日：1990-05-22
申请号：US222609
申请日：1988-07-21
申请人： Masaaki Kisou
发明人： Masaaki Kisou
IPC分类号： H04N9/78 , H04N9/64
CPC分类号： H04N9/646
摘要： A circuit for reducing noises of a chrominance signal in a television receiver. The circuit includes a decoder for decoding first and second color difference signals, each including a noise component from a received chrominance signal, a signal subtraction circuit for generating a first frame difference signal in response to two successive first color difference signals and a second frame difference signal in response to two successive second color difference signals, a signal converting circuit for extracting a first compensation signal from the first frame difference signal and a second compensation signal from the second frame difference signal, a noise reduction circuit for reducing noises from the color difference signals in response to the compensation signals, a discrimination circuit for discriminating whether both the first and second frame difference signals are smaller than a prescribed level or not and for generating a control signal in response thereto, and a signal transmission circuit for transferring the compensation signals from the signal converting circuit to the noise reduction circuit in response to the control signal only when both the frame difference signals are smaller than the prescribed level.

3. 发明授权

US4833537A Noise reduction circuit for video signal having suitable nonlinear processing character 失效
标题翻译：具有适合非线性处理特性的视频信号降噪电路
公开(公告)号：US4833537A
公开(公告)日：1989-05-23
申请号：US136653
申请日：1987-12-22
申请人： Motohiko Takeuchi , Masaaki Kisou
发明人： Motohiko Takeuchi , Masaaki Kisou
IPC分类号： H04N5/21 , H04N5/911
CPC分类号： H04N5/911 , H04N5/21
摘要： A noise reduction circuit stores the video signal of one frame as input through an A/D converter from a VTR main body, into a frame memory via a first subtracting circuit. A second subtracting circuit subtracts the delayed video signal delayed one frame, which is derived from said frame memory, from the video signal. The same outputs the subtraction result as a difference signal. The amplitude level of the video signal is detected by the detecting circuit. The nonlinear characteristic appropriate to the difference signal output from the subtracting circuit is selected by the level signal output from the detecting circuit. Subtracting circuit subtracts the noise component selected and extracted by the nonlinear processing circuit from the video signal, thereby to remove the noise component. The video signal with no noise component is applied through a D/A converter from the subtracting circuit, to a CRT display where it is visualized.
摘要翻译：降噪电路通过A / D转换器将一帧的视频信号从VTR主体存储到帧存储器中，经由第一减法电路。第二减法电路从视频信号中减去从所述帧存储器导出的延迟的一帧的延迟视频信号。相同的输出结果作为差分信号。视频信号的幅度电平由检测电路检测。通过从检测电路输出的电平信号选择适合于从减法电路输出的差分信号的非线性特性。减法电路从视频信号中减去由非线性处理电路选择和提取的噪声分量，从而消除噪声分量。没有噪声分量的视频信号通过D / A转换器从减法电路施加到可视化的CRT显示器。

4. 发明授权

US4807034A Noise reduction circuit for video signal having field memory 失效
标题翻译：具有现场存储器的视频信号降噪电路
公开(公告)号：US4807034A
公开(公告)日：1989-02-21
申请号：US163605
申请日：1988-03-03
申请人： Motohiko Takeuchi , Masaaki Kisou
发明人： Motohiko Takeuchi , Masaaki Kisou
IPC分类号： H04N5/21 , H04N5/911 , H04N5/93 , H04N7/18
CPC分类号： H04N5/911 , H04N5/21
摘要： A noise reduction circuit allows a field memory to store 1-field data of a video signal through a subtracting circuit. The video signal is supplied from a VTR through an A/D converter. The noise reduction circuit causes a subtracting circuit to subtract a delayed video signal, which is supplied from the field memory with a 1-field time delay, from the video signal and allows the resultant signal to be output as a field difference signal. A noise component included in the video signal is extracted by a noise extracting circuit in accordance with the field difference signal, and is output to the subtracting circuit. In a comparing circuit, the noise component is compared with a predetermined reference value so as to determine whether the video signal represents a motion or motionless picture. In accordance with this determination result, memory control circuit controls whether to write the video signal supplied from the subtracting circuit in the field memory. In addition, a video signal from which the noise component is removed is supplied from the subtracting circuit and monitored on a CRT display through a D/A converter or the like.
摘要翻译：降噪电路允许场存储器通过减法电路存储视频信号的1场数据。视频信号通过A / D转换器从VTR提供。减噪电路使减法电路从视频信号中减去从场存储器提供的延迟视频信号，并将其作为场差信号输出。包含在视频信号中的噪声分量根据场差信号由噪声提取电路提取，并被输出到减法电路。在比较电路中，将噪声分量与预定参考值进行比较，以便确定视频信号是否表示运动或静止图像。根据该确定结果，存储器控制电路控制是否将从减法电路提供的视频信号写入场存储器。此外，从减法电路提供去除噪声分量的视频信号，并通过D / A转换器等在CRT显示器上进行监视。

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