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公开(公告)号：US08754988B2
公开(公告)日：2014-06-17
申请号：US12976729
申请日：2010-12-22
申请人： Daniel G. Baker
发明人： Daniel G. Baker
CPC分类号： H04N5/21 , G06T7/0002 , G06T7/13 , G06T2207/30168 , H04N5/14 , H04N17/004
摘要： A single-ended blur detection probe and method with a local sharpness map for analyzing a video image sequence uses two sets of edge filters, one for “fast edges” and the other for “slow edges.” Each set of edge filters includes a horizontal bandpass filter, a vertical bandpass filter and a pair of orthogonal diagonal filters where the frequency response of the fast edge filters overlap the frequency response of the slow edge filters. The video image sequence is input to each filter of each set, and the output absolute values are combined with weighting factors to produce a slow edge weighted sum array and a fast edge weighted sum arra. The respective weighted sum arrays are then decimated to produce a slow edge decimated array and a fast edge decimated array. The ratio of the maximum difference value between the decimated arrays and the maximum value from the fast edge decimated array, weighted by an appropriate factor, produces a localized maximum sharpness value, the log of which produces a dimensionless blur value.
摘要翻译： 具有用于分析视频图像序列的局部锐度图的单端模糊检测探针和方法使用两组边缘滤波器，一组用于“快速边缘”，另一组用于“慢边缘”。每组边缘滤波器包括水平 带通滤波器，垂直带通滤波器和一对正交对角线滤波器，其中快速边缘滤波器的频率响应与慢边滤波器的频率响应重叠。 将视频图像序列输入到每一组的每个滤波器，并且将输出绝对值与加权因子组合以产生慢边加权和阵列和快速边缘加权和arra。 然后将相应的加权和阵列抽取以产生慢边抽取阵列和快速边缘抽取阵列。 抽取的阵列之间的最大差值与由快速边缘抽取阵列的最大值的比值由适当的因子加权，产生局部最大锐度值，其日志产生无量纲的模糊值。
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公开(公告)号：US20120218391A1
公开(公告)日：2012-08-30
申请号：US13208583
申请日：2011-08-12
申请人： DANIEL G. BAKER
发明人： DANIEL G. BAKER
IPC分类号： H04N13/04
CPC分类号： H04N13/246 , H04N13/122
摘要： A method of generating a stereoscopic image registration and color balance evaluation display enables a user to align two cameras used to produce a stereoscopic video signal or to analyze a received stereoscopic video signal. Left and right images from the cameras are converted into desired video signal components. Corresponding pixels from the left and right images are compared for each of the video signal components, and plotted as x and y inputs to a Cartesian plot to produce respective two-dimensional (2D) histograms. The multiple 2D histograms are presented as a Quad Diamond display so a user may align the two cameras or analyze the received stereoscopic video signal.
摘要翻译： 产生立体图像配准和颜色平衡评估显示的方法使得用户能够对准用于产生立体视频信号的两个摄像机或分析所接收的立体视频信号。 来自摄像机的左和右图像被转换成所需的视频信号分量。 对于每个视频信号分量对来自左图像和右图像的相应像素进行比较，并将其作为x和y输入绘制到笛卡尔图，以产生相应的二维（2D）直方图。 多个2D直方图呈现为四钻石显示器，因此用户可以对准两个相机或分析所接收的立体视频信号。
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公开(公告)号：US08184747B2
公开(公告)日：2012-05-22
申请号：US11274687
申请日：2005-11-14
申请人： Daniel G. Baker , Barry A. McKibben , Michael D. Nakamura , Evan Albright , Scott E. Zink , Michael S. Overton
发明人： Daniel G. Baker , Barry A. McKibben , Michael D. Nakamura , Evan Albright , Scott E. Zink , Michael S. Overton
CPC分类号： H04L1/205 , G01R13/0254 , G01R31/31711 , G01R31/31725 , G01R31/31727
摘要： A flexible timebase for eye diagrams uses a stable free running oscillator as a sample clock for equivalent time sampling of an input serial digital signal and of a reference signal derived from a subdivided recovered clock of the input serial digital signal. The reference signal samples are provided to a digital phase-locked loop that provides the flexible timebase to an eye pattern generator. The eye pattern generator accumulates the input serial digital signal samples at times corresponding to the reference signal samples to produce the eye diagram. A linear phase detector in the digital phase locked loop converts the reference signal samples to a complex signal using a Hilbert transform and then to a linear ramp of phase values using a CORDIC algorithm with arctangent lookup table. The digital phase-locked loop feedback is subtracted from the linear ramp to provide the input to the loop filter.
摘要翻译： 眼图的灵活时基使用稳定的自由运行振荡器作为采样时钟，用于输入串行数字信号的等效时间采样和从输入串行数字信号的细分恢复时钟导出的参考信号。 将参考信号样本提供给数字锁相环，其向眼图发生器提供灵活的时基。 眼图发生器在对应于参考信号样本的时间累积输入的串行数字信号样本以产生眼图。 数字锁相环中的线性相位检测器使用希尔伯特变换将参考信号样本转换为复信号，然后使用具有反正切查找表的CORDIC算法将其转换为相位值的线性斜坡。 从线性斜坡中减去数字锁相环反馈，为环路滤波器提供输入。
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4.发明申请公开(公告)号：US20090219395A1
公开(公告)日：2009-09-03
申请号：US12065243
申请日：2006-08-28
申请人： Daniel G. Baker , Barry A. McKibben
发明人： Daniel G. Baker , Barry A. McKibben
IPC分类号： H04N17/00
CPC分类号： H04N17/00 , G01R31/31709
摘要： A system and method are provided to generate a histogram of jitter peak values within histogram hardware. The histogram is then transferred to a jitter analyzer, which is implemented in either dedicated hardware or software running on a general purpose processor. The jitter analyzer calculates a cumulative distribution function (CDF) array and a complementary cumulative distribution function (CCDF) array based upon the histogram, and determines the peak jitter values based upon a probability value.
摘要翻译： 提供了一种系统和方法来生成直方图硬件中抖动峰值的直方图。 然后将直方图传输到抖动分析器，抖动分析器以通用处理器上运行的专用硬件或软件实现。 抖动分析器基于直方图计算累积分布函数（CDF）阵列和互补累积分布函数（CCDF）阵列，并且基于概率值确定峰值抖动值。
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公开(公告)号：US07071965B2
公开(公告)日：2006-07-04
申请号：US10428883
申请日：2003-05-01
申请人： Daniel G. Baker
发明人： Daniel G. Baker
IPC分类号： H04N17/02
CPC分类号： H04N17/02
摘要： An artistic color gamut display is generated by obtaining maximum and minimum values for an RGB signal. The maximum and minimum values are used as X and Y values for an XY plot. A triangular graticule, or Spearhead display, is generated for the XY plot having a first side representing Lightness, a second side representing saturation and a third side representing Value. The area within the Spearhead display represents valid color gamut. The Spearhead display may be combined with more traditional displays, such as Vector or Arrowhead displays, to provide a completely three-dimensional analysis of the RGB signal in terms of the artistic parameters of Hue, Saturation and Value or Lightness.
摘要翻译： 通过获得RGB信号的最大值和最小值来产生艺术色域显示。 最大值和最小值用作XY图的X和Y值。 对于具有表示亮度的第一面，表示饱和的第二面和表示值的第三面的XY图生成三角形刻度或矛头显示。 “矛头”显示中的区域表示有效的色域。 矛头显示器可以与更传统的显示器（例如矢量或箭头显示器）相结合，以根据色相，饱和度和值或亮度的艺术参数提供对RGB信号的完全三维分析。
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公开(公告)号：US06650719B1
公开(公告)日：2003-11-18
申请号：US09619243
申请日：2000-07-19
申请人： Daniel G. Baker
发明人： Daniel G. Baker
IPC分类号： H04L2500
CPC分类号： H04N17/004
摘要： A method of measuring MPEG PCR jitter, frequency offset and drift rate uses a selectable, constant measurement bandwidth over non-uniform PCR arrival times and a variable PCR rate. The selectable, constant measurement bandwidth is fixed at a frequency that demarcates between jitter and wander. For each received PCR value a PCR interval is determined from the arrival time of the current PCR value and the arrival time of the preceding arrival time. The PCR values, intervals and the fixed bandwidth are input to a set of difference equations, derived either from a hybrid digital-analog PLL model where the frequency offset, drift rate and jitter are extracted from various points in the PLL feedback control system or from a linear filtering approximation to a least mean square (LMS) frequency offset and an LMS drift rate estimator of a simple second order time equation for the PCR values.
摘要翻译： 测量MPEG PCR抖动，频率偏移和漂移率的方法使用在不均匀PCR到达时间和可变PCR速率上的可选择的恒定测量带宽。 可选择的恒定测量带宽以限制抖动和漂移之间的频率固定。 对于每个接收的PCR值，从当前PCR值的到达时间和先前到达时间的到达时间确定PCR间隔。 将PCR值，间隔和固定带宽输入到一组差分方程，该混合数字模拟PLL模型从PLL反馈控制系统中的各个点提取频偏，漂移率和抖动， 针对PCR值的简单二阶时间方程的最小均方（LMS）频率偏移的线性滤波近似和LMS漂移率估计器。
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公开(公告)号：US5488310A
公开(公告)日：1996-01-30
申请号：US294274
申请日：1994-08-22
申请人： Daniel G. Baker , Robert W. Parish , Scott E. Zink
发明人： Daniel G. Baker , Robert W. Parish , Scott E. Zink
摘要： A return-loss detector for a serial digital signal source uses a return-loss bridge circuit to exploit the broadband spectral characteristics of a serial digital signal from the signal source to monitor the termination conditions of a system being driven. A differential pair of serial digital signals from the source are input to the bridge circuit having a reference termination in one leg and the system termination in the other. A broadband detector is used at the output of the bridge circuit to generate an error signal, which is measured by a detector or metering circuit. The measured signal may be displayed as a value in dB or may be input to a comparator to provide an alarm or warning signal to an operator.
摘要翻译： 用于串行数字信号源的回波损耗检测器使用回波损耗桥接电路来利用来自信号源的串行数字信号的宽带频谱特性来监视被驱动的系统的终止条件。 来自源的差分对的串行数字信号被输入到具有一条支路中的参考端接和另一条中的系统端接的桥式电路。 在桥接电路的输出端使用宽带检测器来产生由检测器或计量电路测量的误差信号。 测量的信号可以以dB表示，或者可以输入到比较器，以向操作者提供警报或警告信号。
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公开(公告)号：US5282032A
公开(公告)日：1994-01-25
申请号：US941492
申请日：1992-09-08
申请人： Daniel G. Baker
发明人： Daniel G. Baker
IPC分类号： H04N5/92 , G11B20/18 , H04N5/945 , H04N7/24 , H04N17/00 , H04N19/89 , H04N21/2383 , H04N21/438 , H04N5/14
CPC分类号： H04N21/2383 , H04N17/004 , H04N19/89 , H04N21/4382 , H04N5/945
摘要： A method of detecting bit errors in serial digital video uses a digital demodulator to process a parallel video data signal derived from the serial digital video. The output of the demodulator is converted to analog, lowpass filtered, squared and compared with a threshold value. The result of the comparison produces an error signal when bit errors occur. The bit errors may be counted over a predetermined time period, may be used to switch a data filter into the video data output path to conceal the bit errors, and may be used to map the bit errors to a display for visualization of the location of the errors within a video image represented by the serial digital video.
摘要翻译： 一种在串行数字视频中检测比特错误的方法使用数字解调器来处理从串行数字视频得到的并行视频数据信号。 解调器的输出转换为模拟，低通滤波，平方，并与阈值进行比较。 当比特错误发生时，比较结果产生错误信号。 比特误差可以在预定时间段内计数，可以用于将数据滤波器切换到视频数据输出路径中以隐藏比特错误，并且可以用于将比特误差映射到显示器，用于可视化的位置 由串行数字视频表示的视频图像内的错误。
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公开(公告)号：US5172229A
公开(公告)日：1992-12-15
申请号：US618128
申请日：1990-11-26
申请人： Daniel G. Baker
发明人： Daniel G. Baker
CPC分类号： H04N17/02
摘要： A sync vector generator for a composite vectorscope generates a gate from the horizontal sync pulses of a video input signal as a function of a reference signal selected from either the video input signal or an external reference signal. The gate width is equal to an integer multiple of cycles of the subcarrier frequency for the video input signal. A high-Q resonant tank circuit tuned to the subcarrier frequency is activated by the gate to produce a burst signal having a frequency equal to the subcarrier frequency and having a number of cycles equal to the integer multiple. The burst signal is input together with quadrature subcarrier frequency components to the demodulators of a conventional vectorscope to produce an output display that is a measure of horizontal sync jitter and instantaneous SC/H phase.
摘要翻译： 用于复合矢量示波器的同步矢量生成器根据从视频输入信号或外部参考信号中选择的参考信号的函数从视频输入信号的水平同步脉冲产生门。 栅极宽度等于视频输入信号的子载波频率的周期的整数倍。 调谐到子载波频率的高Q谐振回路由门激活，以产生具有等于子载波频率的频率并且具有等于整数倍的周期数的突发信号。 突发信号与正交子载波频率分量一起输入到常规矢量示波器的解调器，以产生作为水平同步抖动和瞬时SC / H相的测量的输出显示。
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公开(公告)号：US4890158A
公开(公告)日：1989-12-26
申请号：US244876
申请日：1988-09-15
摘要： A recursive noise reduction filter for video components reduces the noise bandwidth of a signal without degrading the signal spectrum. Demodulated chrominance or peak detected chrominance from a video signal output by a video system in reponse to a video test signal is input to the recursive noise reduction filter which acts as a comb filter to suppress noise significantly at frequencies other than harmonics of the horizontal line rate. The signal is scaled by a first attenuator having a scaling factor of (1-a), where (a) is less than one, and input to a summing circuit. Also input to the summing circuit is a delayed signal from a prior horizontal line scaled by the scaling factor (a). The output of the summing circuit is a filtered output signal. The signal is sampled only during horizontal lines that have the video test signal and is stored for subsequent accumulation with other horizontal lines also having the video test signal. The fitler serves to add the vertically correlated part of the signal corresponding to the video test signal while averaging out the noise, thus improving the overall signal to noise ratio without degrading the signal spectrum and, hence, enhancing differential gain and phase measurements.
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