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公开(公告)号：US4223339A
公开(公告)日：1980-09-16
申请号：US38202
申请日：1979-05-11
申请人： William A. Lagoni , Jack S. Fuhrer
发明人： William A. Lagoni , Jack S. Fuhrer
CPC分类号： H04N9/646
摘要： In a color television receiver including a comb filter for separating luminance and chrominance components of a color television signal, a network is included for selectively restoring and enhancing vertical image detail to preserve and enhance vertical resolution in the luminance content of a displayed image. The comb filter provides a combed luminance signal output from which vertical detail signal information has been unavoidably deleted, and a combed chrominance signal output including signal frequency components representative of the deleted signal, which are selectively extracted from the combed chrominance signal. Low level detail signals are restored to the combed luminance signal via a first signal processing network with a prescribed restoration gain. The detail signal is also combined with the combed luminance signal via a second signal processing network which cores (removes) low level detail signals including noise, and enhances higher level detail signals through amplification to enhance vertical image definition. A resultant reconstituted luminance component manifests restored low level vertical detail information as well as enhanced higher level vertical detail information, without enhancing unwanted signal components such as noise.
摘要翻译： 在包括用于分离彩色电视信号的亮度和色度分量的梳状滤波器的彩色电视接收机中，包括用于选择性地恢复和增强垂直图像细节的网络，以保持和增强显示图像的亮度内容中的垂直分辨率。 梳状滤波器提供梳状亮度信号输出，从而不可避免地删除垂直细节信号信息，以及包括代表删除信号的信号频率分量的梳状色度信号输出，其从精梳色度信号中选择性地提取。 低电平细节信号通过具有规定恢复增益的第一信号处理网络恢复到精梳亮度信号。 细节信号还通过第二信号处理网络与梳状亮度信号相结合，第二信号处理网络对包含噪声的低级细节信号进行核心（去除），并且通过放大来增强更高级的细节信号以增强垂直图像定义。 所得到的重构亮度分量表现出恢复的低水平垂直细节信息以及增强的较高级垂直细节信息，而不增强诸如噪声的不期望的信号分量。
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公开(公告)号：US4454533A
公开(公告)日：1984-06-12
申请号：US323059
申请日：1981-11-19
申请人： William A. Lagoni
发明人： William A. Lagoni
CPC分类号： H04N9/646
摘要： A coring circuit is provided in a system which includes a gain controlled device. The diodes which produce the coring effect are biased by a signal which is related to the gain control signal coupled to the device. In this way, the coring threshold is made to vary relative to changes in the amplitude of the applied signal so that the percentage of coring remains fixed over a range of applied signal amplitude levels.
摘要翻译： 在包括增益控制装置的系统中提供取芯电路。 产生取芯效应的二极管被与耦合到器件的增益控制信号有关的信号偏置。 以这种方式，使得取芯阈值相对于所施加的信号的幅度的变化而变化，使得取芯百分比在施加的信号幅度水平的范围上保持固定。
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3.发明授权Apparatus for reducing the effect of co-channel interference on synchronizing pulses 失效用于减少同信道干扰对同步脉冲的影响的装置
公开(公告)号：US4343019A
公开(公告)日：1982-08-03
申请号：US225772
申请日：1981-01-16
申请人： William A. Lagoni
发明人： William A. Lagoni
CPC分类号： H04N9/78
摘要： An apparatus for reducing the effect of co-channel interference on horizontal synchronization of a television receiver having a comb filter for separating luminance and chrominance signals from a composite video signal comprises a synchronizing pulse separator, coupled to the comb filter output, for driving horizontal synchronizing pulses from the comb filter luminance signal. The co-channel interference beat frequency signals are reduced in amplitude by the comb filter and hence do not disrupt the operation of the synchronizing pulse separator.
摘要翻译： 一种用于减少同信道干扰对具有用于从复合视频信号分离亮度和色度信号的梳状滤波器的电视接收机的水平同步的影响的装置包括耦合到梳状滤波器输出的用于驱动水平同步的同步脉冲分离器 来自梳状滤波器亮度信号的脉冲。 同频干扰拍频信号通过梳状滤波器减小振幅，因此不会中断同步脉冲分离器的操作。
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公开(公告)号：US4173023A
公开(公告)日：1979-10-30
申请号：US908561
申请日：1978-05-24
申请人： William A. Lagoni , James B. Webb
发明人： William A. Lagoni , James B. Webb
CPC分类号： H04N9/455
摘要： A burst gate pulse generating circuit includes a normally saturated transistor responsive to a pulse representative of a horizontal sync component of a video signal which includes a burst interval. The sync pulse is coupled to a base input of the transistor via an RC differentiating network for causing the transistor to operate between saturated and cut-off states, such that a gate pulse produced at the transistor collector output is delayed relative to the sync pulse and substantially coincides with the burst interval. The circuit is arranged so that the sync pulse as coupled via the differentiating network causes the base-emitter junction of the transistor to break down in the reverse direction. The timing of the output gate pulse is therefore substantially independent of the sync pulse amplitude, which can vary undesirably, thereby promoting accurate pulse timing.
摘要翻译： 突发脉冲门脉冲发生电路包括响应于表示包括突发间隔的视频信号的水平同步分量的脉冲的正常饱和晶体管。 同步脉冲经由RC微分网络耦合到晶体管的基极输入端，用于使晶体管在饱和和截止状态之间工作，使得在晶体管集电极输出处产生的栅极脉冲相对于同步脉冲延迟， 基本上与突发间隔一致。 电路被布置成使得经由微分网络耦合的同步脉冲导致晶体管的基极 - 发射极结反向分解。 因此，输出门脉冲的定时基本上与同步脉冲振幅无关，这可能会不期望地变化，从而促进了准确的脉冲定时。
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5.发明授权Multi-input television receiver with combined clamping and synchronizing signal separation circuit 失效具有组合钳位和同步信号分离电路的多输入电视接收机
公开(公告)号：US5436667A
公开(公告)日：1995-07-25
申请号：US306807
申请日：1994-09-14
摘要： A television receiver embodying the invention includes a plurality of luminance signal sources, each capacitively coupled to an input of a luminance signal selection switch and each capacitor being coupled to a respective clamp circuit with each clamp circuit having a reference voltage input coupled to a common reference voltage source. A sync separator is provided having a first input coupled to receive the output of luminance signal selection switch and a second input coupled to a source of reference potential derived from said reference voltage source. Advantageously, the overall number of clamp circuits is minimized by merging the sync separator circuit with the input signal selection clamping circuit.
摘要翻译： 实施本发明的电视接收机包括多个亮度信号源，每个亮度信号源电容耦合到亮度信号选择开关的输入，并且每个电容器耦合到相应的钳位电路，每个钳位电路具有耦合到公共参考的参考电压输入 电压源。 提供同步分离器，其具有耦合以接收亮度信号选择开关的输出的第一输入和耦合到从所述参考电压源导出的参考电位源的第二输入。 有利地，通过将同步分离器电路与输入信号选择钳位电路合并，使钳位电路的总数最小化。
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6.发明授权Non-linear contrast control apparatus with pixel distribution measurement for video display system 失效用于视频显示系统的具有像素分布测量的非线性对比度控制装置
公开(公告)号：US5422680A
公开(公告)日：1995-06-06
申请号：US296074
申请日：1994-08-24
CPC分类号： H04N5/20
摘要： A video signal to be processed is applied to a non-linear processor having an adjustable gain responsive to a control signal over at least one portion of the amplitude range of the video input signal. A sampling circuit, responsive to the video signal, generates video samples related to the video signal. A control circuit, responsive to the video samples, generates the control signal in accordance with the number of samples in at least a given amplitude range thereby controlling the percentage of samples of a given range in displayed images. Plural control and sampling circuits may be included provide control for white stretch processing, black stretch processing and video mid-point processing for enhancing contrast through out the entire video signal range.
摘要翻译： 要处理的视频信号被应用于响应于视频输入信号的幅度范围的至少一部分上的控制信号的具有可调增益的非线性处理器。 响应于视频信号的采样电路产生与视频信号相关的视频采样。 响应于视频样本的控制电路根据至少给定幅度范围内的样本数生成控制信号，从而控制显示图像中给定范围的样本的百分比。 可以包括多个控制和采样电路，用于白拉伸处理，黑拉伸处理和视频中点处理的控制，以在整个视频信号范围内增强对比度。
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7.发明授权Beam current limiting arrangement for a television system with picture-in-picture provisions 失效具有画中画规定的电视系统的光束电流限制装置
公开(公告)号：US5204748A
公开(公告)日：1993-04-20
申请号：US805486
申请日：1991-12-11
申请人： William A. Lagoni
发明人： William A. Lagoni
CPC分类号： H04N5/59 , H04N21/4316 , H04N21/4854 , H04N5/45
摘要： In a color television system having picture-in-picture (PIP) capability, apparatus is provided for automatically modifying the operation of a beam current limiting (BCL) section while the small picture is being displayed to prevent the visibility of the small picture from being adversely affected. In the preferred embodiment, a contrast BCL control signal is decoupled from the contrast section, and a substitute control signal, at least approximating the user responsive contrast control signal, is substituted for it in response to a switching signal which causes the small picture to be inserted within the big picture. However, the BCL section continues to be responsive to the beam current during the time interval in which the small picture is displayed so that the BCL contrast signal accurately represents the contents of the entire image. In addition, the operation of an automatic contrast reduction section which is responsive to a peak-white representative video signal is also disabled during the time interval in which the small picture is displayed. In an alternate embodiment only the operation of the contrast BCL section is disabled, but the operation of the automatic contrast control is maintained. If desired, a brightness BCL control signal may also be decoupled from the brightness section.
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公开(公告)号：US4980756A
公开(公告)日：1990-12-25
申请号：US398849
申请日：1989-08-25
申请人： William A. Lagoni
发明人： William A. Lagoni
摘要： In a color television system, the color signals produced by a luma-chroma IC are summed to produce a signal representative of processed luminance information not otherwise readily available. Pulses of the summed signal corresponding to retrace blanking pulses contained in the color signals, are stripped away in order to reduce errors when attributes of the summed signal are determined, e.g., by an average detector. The detector provides a control signal for modification of a luminance signal, such as by "white stretch".
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9.发明授权
公开(公告)号：US4365266A
公开(公告)日：1982-12-21
申请号：US255375
申请日：1981-04-20
申请人： William A. Lagoni
发明人： William A. Lagoni
CPC分类号： H04N5/208
摘要： A system for processing the luminance component of a composite video signal in a television receiver is disclosed. The receiver includes a comb filter responsive to the video signal for providing first and second combed output signals from which luminance and chrominance components are respectively derived. A restored luminance signal, comprising signals from the first comb filter output and vertical detail information derived from the second comb filter output, is linearly processed by a network including a horizontal signal peaking circuit. A vertical detail component derived from the second comb filter output is non-linearly processed by a network which generates a vertical detail peaking component. The vertical peaking component is low-pass filtered and then combined with horizontally peaked luminance signals to produce a horizontally and vertically peaked luminance signal, which is afterwards applied to further luminance signal processing circuits of the receiver.
摘要翻译： 公开了一种用于处理电视接收机中的复合视频信号的亮度分量的系统。 接收机包括响应于视频信号的梳状滤波器，用于提供分别导出亮度和色度分量的第一和第二梳状输出信号。 包括来自第一梳状滤波器输出的信号和从第二梳状滤波器输出导出的垂直细节信息的恢复的亮度信号由包括水平信号峰化电路的网络线性处理。 从第二梳状滤波器输出导出的垂直细节分量由生成垂直细节峰值分量的网络进行非线性处理。 垂直峰值分量被低通滤波，然后与水平峰值亮度信号组合，产生一个水平和垂直峰值的亮度信号，后者被施加到接收机的其他亮度信号处理电路。
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10.发明授权Video processing circuit with IF AGC loop, auxiliary video clamp and shared reference voltage source formed on common integrated circuit 失效具有IF AGC环路，辅助视频钳位和共用参考电压源的视频处理电路形成在公共集成电路上
公开(公告)号：US5343255A
公开(公告)日：1994-08-30
申请号：US948206
申请日：1992-09-17
申请人： William A. Lagoni
发明人： William A. Lagoni
摘要： A clamp system for use in a television receiver having tuner and auxiliary video sources, comprises an IF AGC and video detector circuit having an AGC reference voltage input and an auxiliary video input signal clamp circuit having a reference voltage input. The detector circuit and the clamp circuit are each formed on a common integrated circuit along with a video switch for selecting video signals provided by said detector and clamp circuits. The integrated circuit further includes a reference voltage source and a bias generator for deriving the AGC reference voltage and the auxiliary input signal clamp voltage from the common source.
摘要翻译： 一种用于具有调谐器和辅助视频源的电视接收机的钳位系统，包括具有AGC参考电压输入的IF AGC和视频检测器电路以及具有参考电压输入的辅助视频输入信号钳位电路。 检测器电路和钳位电路分别与用于选择由所述检测器和钳位电路提供的视频信号的视频开关一起形成在公共集成电路上。 集成电路还包括参考电压源和用于从公共源导出AGC参考电压和辅助输入信号钳位电压的偏置发生器。
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