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1. 发明授权

US5170155A System for applying brightness signals to a display device and comparator therefore 失效
标题翻译：用于将亮度信号应用于显示设备的系统以及由此产生的比较器
公开(公告)号：US5170155A
公开(公告)日：1992-12-08
申请号：US600046
申请日：1990-10-19
申请人： Dora Plus , Leopold A. Harwood
发明人： Dora Plus , Leopold A. Harwood
IPC分类号： G02F1/133 , G09G3/20 , G09G3/36
CPC分类号： G09G3/2011 , G09G3/3688 , G09G2310/0259 , G09G2310/027
摘要： A system for applying brightness signals to the pixels of a display device includes a transmission gate for each column of pixels. The control electrodes of the transmission gates are precharged to the threshold voltage of the gates to substantially increase the speed of the system. Comparators compare brightness voltages to a reference ramp voltage to enhance the speed and accuracy of the system.
摘要翻译：用于将亮度信号施加到显示装置的像素的系统包括用于每列像素的传输门。传输门的控制电极被预充电到门的阈值电压，以显着提高系统的速度。比较器将亮度电压与参考斜坡电压进行比较，以提高系统的速度和精度。

2. 发明授权

US4700217A Chrominance signal phase locked loop system for use in a digital television receiver having a line-locked clock signal 失效
标题翻译：色度信号锁相环系统，用于具有线锁时钟信号的数字电视接收机
公开(公告)号：US4700217A
公开(公告)日：1987-10-13
申请号：US893185
申请日：1986-08-05
申请人： Alvin R. Balaban , Walter H. Demmer , Leopold A. Harwood , Chandrakant B. Patel
发明人： Alvin R. Balaban , Walter H. Demmer , Leopold A. Harwood , Chandrakant B. Patel
IPC分类号： H04N9/45 , H04N9/66
CPC分类号： H04N9/45 , H04N9/66
摘要： A digital television receiver which uses a line-locked clock signal employs chrominance signal demodulation circuitry which produces a digital oscillatory signal that is locked in phase to the color reference burst signal component of the incoming video signals. An analog voltage controlled oscillator generates an oscillatory signal having a frequency of approximately twice the color subcarrier frequency. This signal is combined with the composite video signals and the combined signal is digitized by an analog to digital converter. The digitized oscillatory signal is separated from the combined digital signal and is used to synchronize a digital phase locked loop. The digital phase locked loop generates two quadrature phase related signals having frequencies that are one-half the frequency of the analog oscillatory signal. These two signals are used to synchronously demodulate the chrominance signal components of the incoming video signals to obtain two quadrature phase related color difference signals. The control signal for the voltage controlled oscillator is generated by subtracting the burst phase of the demodulated color difference signals from a reference phase and integrating the difference.
摘要翻译：使用线锁时钟信号的数字电视接收机采用色度信号解调电路，其生成与输入视频信号的颜色参考突发信号分量锁相的数字振荡信号。模拟压控振荡器产生具有大约是彩色副载波频率的两倍的频率的振荡信号。该信号与复合视频信号组合，组合信号由模数转换器数字化。数字振荡信号与组合数字信号分离，用于同步数字锁相环。数字锁相环产生频率为模拟振荡信号频率的一半的两个正交相位相关信号。这两个信号用于同步解调输入视频信号的色度信号分量，以获得两个正交相位相关的色差信号。压控振荡器的控制信号通过从参考相位减去解调色差信号的脉冲串相位而积分该差而产生。

3. 发明授权

US4686561A Vertical detail information restoration circuit 失效
标题翻译：垂直细节信息恢复电路
公开(公告)号：US4686561A
公开(公告)日：1987-08-11
申请号：US760910
申请日：1985-07-31
申请人： Leopold A. Harwood , Robert A. Wargo , Chandrakant B. Patel
发明人： Leopold A. Harwood , Robert A. Wargo , Chandrakant B. Patel
IPC分类号： H04N9/78 , H04N5/208 , H04N9/64 , H04N9/77 , H04N5/21
CPC分类号： H04N9/646
摘要： In a composite color video signal, a portion of the signal spectrum is shared by high frequency vertical detail information, and high frequency modulated color difference (I) information. A circuit is described which determines whether the information in the shared frequency band is vertical detail information or color difference information without degradation in the presence of a step input signal, as, for example, in the presence of lettering in the image. A composite video signal is comb filtered to generate comb filtered chrominance and luminance signals. A baseband color difference signal is produced from the comb filtered chrominance signal and the presence of high frequency information in the baseband color difference signal is detected. The bandwidth of the low frequency portion of the comb filtered chrominance signal (i.e. the vertical detail information) which is restored to the comb filtered luminance signal is varied in response to the control signal.
摘要翻译：在复合彩色视频信号中，信号频谱的一部分由高频垂直细节信息和高频调制色差（I）信息共享。描述了一种电路，其确定在共享频带中的信息是垂直细节信息还是色差信息，而不存在步进输入信号的劣化，例如在图像中存在刻字。梳状滤波复合视频信号以产生梳状滤波色度和亮度信号。从梳状滤波色度信号产生基带色差信号，并检测基带色差信号中是否存在高频信息。梳状滤波色度信号的低频部分的带宽（即垂直细节信息）被恢复到梳状滤波的亮度信号，响应于控制信号而变化。

4. 发明授权

US4661853A Interfield image motion detector for video signals 失效
标题翻译：用于视频信号的场间图像运动检测器
公开(公告)号：US4661853A
公开(公告)日：1987-04-28
申请号：US794222
申请日：1985-11-01
申请人： Barbara J. Roeder , Leopold A. Harwood , Hermann J. Weckenbrock
发明人： Barbara J. Roeder , Leopold A. Harwood , Hermann J. Weckenbrock
IPC分类号： H04N7/32 , H04N5/14 , H04N5/21 , H04N9/77 , H04N9/78 , H04N11/04 , H04N7/18 , H04N5/213
CPC分类号： H04N5/21 , H04N5/144
摘要： A motion detector for determining image motion in a video signal develops an array of signals representing the difference between pixels from adjacent frames. The array of signals are grouped into subarrays, each of which include the signal corresponding to the pixel under examination for motion. Each of the subarrays are independently examined to determine if the magnitude of all of the pixel differences represented in a particular subarray exceed a predetermined threshold and/or the pixel differences have like polarity. If these conditions are met in any one of the subarrays, a motion signal is produced.
摘要翻译：用于确定视频信号中的图像运动的运动检测器产生表示来自相邻帧的像素之间的差异的信号阵列。信号阵列被分组成子阵列，每个子阵列包括对应于正在检查的运动像素的信号。独立地检查每个子阵列以确定在特定子阵列中表示的所有像素差异的大小是否超过预定阈值和/或像素差异具有相似的极性。如果在任何一个子阵列中满足这些条件，则产生运动信号。

5. 发明授权

US4562460A Manual hue control as for a digital TV 失效
标题翻译：数字电视的手动色调控制
公开(公告)号：US4562460A
公开(公告)日：1985-12-31
申请号：US487082
申请日：1983-04-21
申请人： Leopold A. Harwood
发明人： Leopold A. Harwood
IPC分类号： H04N9/64
CPC分类号： H04N9/643
摘要： A TV receiver arranged to process video signals in PCM binary format includes a manual hue control circuit which operates on the PCM color mixture signals to effectively rotate the vector sum of the color mixture signals while maintaining the magnitude of the sum substantially constant. The magnitude of the received vector sum is calculated and the angle between the sum and one of the color mixture signal components is determined. Circuitry under user control increments or decrements the angle to rotate the vector sum. Corrected color mixture signals are then generated by multiplying the magnitude of the calculated vector sum by the sine and cosine of the incremented angle.
摘要翻译：以PCM二进制格式处理视频信号的电视接收机包括手动色调控制电路，其操作PCM混色信号以有效地旋转混色信号的矢量和，同时保持总和的大小基本恒定。计算接收矢量和的大小，并确定和与混合信号分量之一之间的角度。用户控制下的电路增量或减小角度以旋转向量和。然后通过将计算的矢量和的大小乘以递增角度的正弦和余弦来产生校正的混合色彩信号。

6. 发明授权

US4464633A Amplifier incorporating gain distribution control for cascaded amplifying stages 失效
标题翻译：用于级联放大级的放大器并入增益分布控制
公开(公告)号：US4464633A
公开(公告)日：1984-08-07
申请号：US363869
申请日：1982-03-31
申请人： Leopold A. Harwood , Robert L. Shanley, II
发明人： Leopold A. Harwood , Robert L. Shanley, II
IPC分类号： H03G3/10 , H03G1/00 , H03G3/30
CPC分类号： H03G1/0023
摘要： A pair of differential amplifier stages are connected in cascade to form a multistage amplifier for signal amplification purposes. The base-emitter paths of current source transistors which establish the operating currents for the respective stages are connected in series across a common source of forward bias voltage. The collector-emitter path of an additional transistor is shunted across the base-emitter path of one of the current source transistors. As biasing of the additional transistor is varied, the distribution of gain between the respective cascaded stages is altered substantially without disturbance of the overall gain of the multistage amplifier.
摘要翻译：一对差分放大器级级联连接形成用于信号放大的多级放大器。建立各个级的工作电流的电流源晶体管的基极 - 发射极路径串联连接在共同的正向偏置电压源上。附加晶体管的集电极 - 发射极路径跨过电流源晶体管之一的基极 - 发射极路径分流。随着附加晶体管的偏置改变，各级联级之间的增益分布基本上改变，而不影响多级放大器的总体增益。

7. 发明授权

US4143398A Automatic brightness control circuit employing a closed control loop stabilized against disruption by large amplitude video signals 失效
标题翻译：自动亮度控制电路采用闭合控制环路，对大型放大器视频信号的破坏进行稳定
公开(公告)号：US4143398A
公开(公告)日：1979-03-06
申请号：US888932
申请日：1978-03-22
申请人： Leopold A. Harwood , Erwin J. Wittmann
发明人： Leopold A. Harwood , Erwin J. Wittmann
IPC分类号： H04N5/57 , H04N5/16 , H04N9/535
CPC分类号： H04N5/57
摘要： Brightness control apparatus in a video system employing a sample and hold circuit including a charge storage capacitor. The sample and hold circuit forms a closed control loop with a signal processing channel, and is keyed during periodic blanking intervals of the video signal to sample the magnitude of a reference voltage and a brightness representative blanking level of the video signal. The sample and hold circuit provides an output control signal indicative of the voltage difference between the reference voltage and the blanking level. The control signal is applied to the signal channel for translating the blanking level in a direction to minimize the voltage difference, so that a desired relationship between the reference voltage and the blanking level is preserved. In a preferred embodiment, a diode coupled between a sampling transistor and the capacitor assures that the capacitor is not charged improperly in the event the normal current conducting mode of the transistor is disrupted in the presence of large amplitude video signals, thereby preventing operation of the closed control loop from being disrupted.

8. 发明授权

US4684989A Signal background noise detector 失效
标题翻译：信号背景噪声检测器
公开(公告)号：US4684989A
公开(公告)日：1987-08-04
申请号：US826998
申请日：1986-02-07
申请人： Barbara J. Roeder , Leopold A. Harwood , Hermann J. Weckenbrock
发明人： Barbara J. Roeder , Leopold A. Harwood , Hermann J. Weckenbrock
IPC分类号： H04N17/04 , H04N5/21 , H04N5/217 , G06G7/12
CPC分类号： H04N5/21
摘要： Apparatus for estimating noise in an electrical signal having substantially redundant recurring intervals includes circuitry for producing difference samples corresponding to signal differences between the recurring redundant intervals. A number of difference samples are averaged, and ones of the difference samples contributing to each average are subtracted from the averages. Magnitude values are extracted from the differences between the averages and the difference samples. A predetermined number of the magnitude values are averaged to produce a noise estimate signal.
摘要翻译：用于估计具有基本上冗余的重复间隔的电信号中的噪声的装置包括用于产生对应于循环冗余间隔之间的信号差的差分样本的电路。将多个差分样本进行平均，并从平均值中减去贡献于每个平均值的差分样本中的一个。从平均值和差分样本之间的差异中提取幅度值。将预定数量的幅度值平均以产生噪声估计信号。

9. 发明授权

US4670665A Digital pulse width detector 失效
标题翻译：数字脉宽检测器
公开(公告)号：US4670665A
公开(公告)日：1987-06-02
申请号：US760911
申请日：1985-07-31
申请人： Leopold A. Harwood , Robert A. Wargo
发明人： Leopold A. Harwood , Robert A. Wargo
IPC分类号： H04N9/68 , G01R23/15 , G01R29/027 , H03K5/00 , H03K5/1252 , H03K5/153 , H03K5/19 , H03K5/22 , H03K5/13
CPC分类号： G01R29/0273 , G01R23/15
摘要： Apparatus for passing digital pulses from a bilevel digital signal source having widths wider than a given minimum and narrower than a given maximum is described. A first duration sensitive signal gate is coupled to the signal source and passes only signals having widths wider than the given minimum duration. A second duration sensitive signal gate is also coupled to the signal source and passes only signals having widths equal to or wider than the given maximum duration. A signal selection means is coupled to the first and second duration sensitive signal gates, and passes pulses which have been passed by the first but not the second duration sensitive signal gate.
摘要翻译：描述了用于从二维数字信号源传递数字脉冲的装置，其宽度大于给定最小值并且比给定最大值更窄的宽度。第一持续时间敏感信号门耦合到信号源，并且仅传递宽度大于给定最小持续时间的宽度的信号。第二持续时间敏感信号门也耦合到信号源，并且仅传递具有等于或大于给定最大持续时间的宽度的信号。信号选择装置耦合到第一和第二持续时间敏感信号门，并且通过已被第一但不是第二持续时间敏感信号门通过的脉冲。

10. 发明授权

US4630102A Digital chroma overload system 失效
标题翻译：数字色度超载系统
公开(公告)号：US4630102A
公开(公告)日：1986-12-16
申请号：US659452
申请日：1984-10-10
申请人： Robert A. Wargo , Leopold A. Harwood
发明人： Robert A. Wargo , Leopold A. Harwood
IPC分类号： H04N9/68 , H04N9/64
CPC分类号： H04N9/68
摘要： A system for detecting overload conditions of a chrominance signal in which the chrominance signal is compared to a predetermined maximum desired amplitude value. Occurrences of the chrominance signal exceeding the predetermined amplitude are considered to be overload conditions only if the duration of the particular occurrence continues for an interval determined by the noise content of the chrominance signal. The average value of the chrominance signal over the internal is calculated to represent the overload signal.
摘要翻译：一种用于检测色度信号的过载条件的系统，其中色度信号与预定的最大期望幅度值进行比较。只有当特定发生的持续时间持续了由色度信号的噪声含量确定的间隔时，才将超过预定幅度的色度信号的出现视为过载状态。计算内部色度信号的平均值，以表示过载信号。

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