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111. 发明授权

US4841366A Cyclic noise reducing apparatus 失效
标题翻译：循环降噪装置
公开(公告)号：US4841366A
公开(公告)日：1989-06-20
申请号：US32828
申请日：1987-03-31
申请人： Toshiyuki Katagiri , Kazuhisa Marukado
发明人： Toshiyuki Katagiri , Kazuhisa Marukado
IPC分类号： H04N5/21 , H04N5/911
CPC分类号： H04N5/21 , H04N5/911
摘要： A cyclic noise reducing apparatus for reducing noise in video signals by positively feeding back an output video signal which has been delayed through a field memory circuit for storing and selectively delaying video signals by a field (n lines) or by a field plus one line (n+1 lines) and cyclically adding the output video signal to an input video signal. The delay time is selected using a delay time switch for switching during a vertical scanning period the delay time of the signal positively fed back alternately between n and n+1 line periods. Also, the video signal may be alternately delayed by n or n+1 lines by suspending the writing and reading of data to and from the field memory circuit for one line period during the vertical blanking period of each frame.
摘要翻译：一种循环降噪装置，用于通过对通过场存储器电路进行延迟的输出视频信号进行正反馈来减少视频信号中的噪声，以便通过场（n行）或场加一行（n行）来存储和选择性地延迟视频信号 n + 1行），并将输出视频信号循环添加到输入视频信号。使用延迟时间开关来选择延迟时间，以在垂直扫描周期期间交替地在n和n + 1个行周期之间反馈的信号的延迟时间进行切换。此外，视频信号可以在每帧的垂直消隐期间暂停对场存储器电路的数据写入和读取一行周期的交替延迟n或n + 1行。

112. 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。

113. 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。

114. 发明授权

US4709269A Noise reduction circuit for video signal 失效
标题翻译：视频信号降噪电路
公开(公告)号：US4709269A
公开(公告)日：1987-11-24
申请号：US15042
申请日：1987-02-17
申请人： Hidetoshi Ozaki
发明人： Hidetoshi Ozaki
IPC分类号： H04N5/21 , H04N5/911 , H04N5/213
CPC分类号： H04N5/911 , H04N5/21
摘要： A noise reduction circuit for video signal comprises first through third circuits each for obtaining from an input video signal a high frequency component including a noise component and for limiting large amplitude parts thereof, where a filter part of the second circuit has an impulse response characteristic wherein an amplitude increases or decays with time and is complementary to that of a filter part of the first circuit and a filter part of the third circuit has an impulse response characteristic which is essentially a combination of the two impulse response characteristics, and a fourth circuit for carrying out a subtraction between the input video signal and an output signal of the first circuit so as to obtain a first signal which is substantially eliminated of the noise component except for a noise component and distortion remaining at parts in vicinities of rises and falls in the video signal caused by the amplitude limitation carried out in the first circuit, carrying out a subtraction between output signals of the second and third circuits so as to obtain a second signal which includes the noise component and the waveform distortion of the first signal with an inverted phase, and for adding the first and second signals so as to produce an output video signal which has been substantially eliminated of all the noise component.
摘要翻译：用于视频信号的降噪电路包括第一至第三电路，每个电路用于从输入视频信号获得包括噪声分量的高频分量并用于限制其大幅度部分，其中第二电路的滤波器部分具有脉冲响应特性，其中振幅随时间增加或衰减，并且与第一电路的滤波器部分的幅度互补，并且第三电路的滤波器部分具有基本上是两个脉冲响应特性的组合的脉冲响应特性，以及用于在输入视频信号和第一电路的输出信号之间进行减法，以获得除了噪声分量以外的噪声分量基本上消除的第一信号，以及在第视频信号由第一电路中执行的幅度限制引起，执行a 在第二和第三电路的输出信号之间进行减法，以获得包括具有反相的第一信号的噪声分量和波形失真的第二信号，并且用于相加第一和第二信号以产生输出视频已经基本上消除了所有噪声分量的信号。

115. 发明授权

US4656531A Noise-eliminating apparatus for a video tape recorder 失效
标题翻译：用于录像机的消声装置
公开(公告)号：US4656531A
公开(公告)日：1987-04-07
申请号：US610413
申请日：1984-05-15
申请人： Takashi Ishii
发明人： Takashi Ishii
IPC分类号： G11B20/02 , G11B20/06 , G11B20/22 , H04N5/911 , H04N9/802 , H04N5/782 , H04N5/94
CPC分类号： H04N5/911 , G11B20/06 , G11B20/22 , H04N9/802
摘要： A noise-eliminating apparatus for a video tape recorder wherein the high frequency signals of the first and second channels, reproduced by a helical scan type video tape recorder, an alternately selected by the corresponding first and second switches. The selected high frequency signal is supplied to the main demodulator and auxiliary demodulator. The changeover operations of the first and second switches are carried out at a prescribed internal by the first and second control signals. An output signal from the main demodulator in shut off by a third switch during the period in which the high frequency signals of the first and second channels partly overlap each other. The shut off period is supplemented by an output demodulated signal from the auxiliary demodulator.
摘要翻译：一种用于录像机的噪声消除装置，其中由螺旋扫描型录像机再现的第一和第二声道的高频信号由相应的第一和第二开关交替选择。所选择的高频信号被提供给主解调器和辅助解调器。第一和第二开关的切换操作由第一和第二控制信号在规定的内部执行。在第一和第二通道的高频信号部分彼此重叠的时段期间，来自主解调器的输出信号由第三开关切断。关断周期由辅助解调器的输出解调信号补充。

116. 发明授权

US4291330A Video signal processing circuit for eliminating an interfering signal 失效
标题翻译：用于消除干扰信号的视频信号处理电路
公开(公告)号：US4291330A
公开(公告)日：1981-09-22
申请号：US32926
申请日：1979-04-24
申请人： Jun Hirai
发明人： Jun Hirai
IPC分类号： G11B20/06 , H04N5/911 , H04N5/93 , H04N9/79 , H04N9/84 , H04N9/88 , H04N5/21 , H04N5/785
CPC分类号： H04N5/911 , H04N9/7917 , H04N9/88
摘要： A video signal processing circuit eliminates an interfering signal that is included in a video signal, and is especially effective for eliminating an intefering signal that results from reproducing a video signal that is recorded in successive slant tracks on a recording medium, such as magnetic tape. In the video signal processing circuit, a delay line delays at least the luminance component of the video signal by a predetermined number of horizontal line intervals, a first subtracting circuit combines the delayed luminance component with the undelayed luminance component to produce a first difference signal, a limter limits the first difference signal and presents the limited first difference signal to a second subtracting circuit, where the latter signal is subtractively combined with the delayed luminance signal to produce an output signal free of interfering signals. In order to improve the performance of the processing circuit, a high pass filter and an adder circuit can be included to pass the high frequency portion of the first difference signal around the limiter. Alternatively, a deemphasizing circuit and a preemphasizing circuit can be respectively included in advance of, and following, the limiter.
摘要翻译：视频信号处理电路消除了包括在视频信号中的干扰信号，并且特别有效地消除由再现记录在诸如磁带的记录介质上的连续倾斜磁道中的视频信号所产生的整合信号。在视频信号处理电路中，延迟线至少将视频信号的亮度分量延迟了预定数量的水平行间隔，第一减法电路将延迟亮度分量与未延迟的亮度分量进行组合以产生第一差分信号，限幅器限制第一差分信号并将有限的第一差分信号提供给第二减法电路，其中后一个信号与延迟的亮度信号相减，以产生没有干扰信号的输出信号。为了提高处理电路的性能，可以包括高通滤波器和加法器电路，以使限制器周围的第一差分信号的高频部分通过。或者，可以在限幅器之前和之后分别包括去加重电路和预加重电路。

117. 发明授权

US4097907A Method and apparatus for the suppression of switching disturbances 失效
标题翻译：用于抑制开关干扰的方法和装置
公开(公告)号：US4097907A
公开(公告)日：1978-06-27
申请号：US763591
申请日：1977-01-28
申请人： Winfried Horstmann
发明人： Winfried Horstmann
IPC分类号： H04N5/911 , H04L7/00
CPC分类号： H04N5/911
摘要： A system for suppressing signal disturbances, which are due to switching from a first television signal to a second television signal, for use during a playback of the television signals on a magnetic tape recorder and in connection with an electronic switch for disconnecting the first television signal and connecting the second television signal to output terminals of the switch includes a delay line coupled between a demodulator and a timing error corrector for receiving and delaying the demodulated signals for a time substantially equal to a line period. Additionally, a switching sub-system is coupled to the demodulator for receiving and demodulated signals and the delayed demodulated signals, and for switching for a period of time substantially equal to the line period to generate another output signal from the demodulated signals; furthermore an amplitude filter is coupled to the switching subsystem, and the timing error corrector for receiving the output signals, and selectively passing synchronous signals, forming a portion of the output signals, to the timing error corrector.
摘要翻译：一种用于抑制由于从第一电视信号切换到第二电视信号的信号干扰的系统，用于在磁带录像机上重放电视信号期间并且与用于断开第一电视信号的电子开关相结合并且将所述第二电视信号连接到所述开关的输出端包括延迟线，所述延迟线耦合在解调器和定时误差校正器之间，用于接收并延迟所述解调信号的时间基本上等于线路周期。此外，切换子系统耦合到解调器，用于接收和解调的信号和延迟的解调信号，并且用于切换基本上等于线路周期的时间段，以从解调的信号产生另一个输出信号; 此外，幅度滤波器耦合到开关子系统，以及用于接收输出信号的定时误差校正器，并且将定时输出信号的一部分选择性地传送到定时误差校正器。

118. 发明授权

US2937241A Noise compensation means in a magnetic recorder 失效
标题翻译：噪声补偿意味着磁记录器
公开(公告)号：US2937241A
公开(公告)日：1960-05-17
申请号：US78139258
申请日：1958-12-18
申请人： WESTGATE LAB INC
发明人： CHARLES COLBERT
IPC分类号： G11B5/02 , G11B23/00 , H04N5/911
CPC分类号： G11B23/0007 , G11B5/02 , H04N5/911

119. 发明申请

US20210329184A1 IMAGING DEVICE AND IMAGING METHOD 有权
公开(公告)号：US20210329184A1
公开(公告)日：2021-10-21
申请号：US17224073
申请日：2021-04-06
申请人： c/o Olympus Corporation
发明人： Yasuto WATANABE , Takeshi KAWAWA , Satoshi MIYAZAKI , Takeshi SUZUKI , Keiji KUNISHIGE
IPC分类号： H04N5/365 , H04N5/911 , H04N5/378 , H04N5/353 , H04N5/361 , H04N5/341
摘要： An imaging device acquires first dark image data in a state where an image sensor has been light shielded, acquires second dark image data in a state where the image sensor has been light shielded, based on completion of exposure, corrects fixed pattern noise of a reference combined image data based on at least one of the first dark image data and the second dark image data, and stores the reference combined image data that has been subjected to correction.

120. 发明授权

US11039102B1 Video feed redundancy 有权
公开(公告)号：US11039102B1
公开(公告)日：2021-06-15
申请号：US15839503
申请日：2017-12-12
申请人： Twitch Interactive, Inc.
发明人： Ivan Marcin , Jonas Bengtson , Tarek Amara , Shawn Hsu , Abhinav Kapoor , Jorge Arturo Villatoro , Eran Ambar
IPC分类号： H04N5/76 , H04N5/92 , H04N21/442 , H04N5/765 , H04N5/38 , H04N5/911 , H04N21/426
摘要： Various techniques for providing video feed redundancy are described herein. Instructions may be provided for switching input to an output video feed between two or more redundant input video feeds. In some examples, the redundant input video feeds may not be duplicates, may not be frame synchronized, may not be transmitted from the same location, may not be transmitted using the same network types or transmission protocols, and/or may not be initiated at the same time. In some examples, the instructions for video feed redundancy may be associated with respective authorization keys for the redundant input video feeds.

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