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    • 12. 发明授权
    • AV delay measurement and correction via signature curves
    • 通过签名曲线进行AV延迟测量和校正
    • US08436939B2
    • 2013-05-07
    • US12892836
    • 2010-09-28
    • Daniel G. Baker
    • Daniel G. Baker
    • H04N9/475
    • H04N17/004
    • Embodiments of the present invention provide systems and methods for non-invasive, “in-service” AV delay detection and correction. These systems and methods do not modify the audio signal or the video signal, nor do they rely on any metadata to be carried with the audio signal or the video signal via the distribution path. Instead, agents located at various points along the distribution path generate very small signature curves for the audio signal and the video signal and distribute them to a manager via a separate data path other than the distribution path. The manager calculates a measured AV delay caused by the distribution path based on these signature curves, and then optionally corrects the measured AV delay by adjusting an in-line delay in the distribution path.
    • 本发明的实施例提供了用于非侵入式“在役”AV延迟检测和校正的系统和方法。 这些系统和方法不修改音频信号或视频信号,也不依赖于通过分配路径与音频信号或视频信号携带的任何元数据。 相反,位于沿着分布路径的各个点处的代理产生用于音频信号和视频信号的非常小的签名曲线,并且经由分配路径以外的单独的数据路径将它们分发给管理者。 管理者基于这些签名曲线计算由分配路径引起的测量的AV延迟,然后通过调整分配路径中的在线延迟来可选地校正测量的AV延迟。
    • 13. 发明申请
    • AV DELAY MEASUREMENT AND CORRECTION VIA SIGNATURE CURVES
    • AV延迟测量和校正通过签名曲线
    • US20110096173A1
    • 2011-04-28
    • US12892836
    • 2010-09-28
    • DANIEL G. BAKER
    • DANIEL G. BAKER
    • H04N17/00
    • H04N17/004
    • Embodiments of the present invention provide systems and methods for non-invasive, “in-service” AV delay detection and correction. These systems and methods do not modify the audio signal or the video signal, nor do they rely on any metadata to be carried with the audio signal or the video signal via the distribution path. Instead, agents located at various points along the distribution path generate very small signature curves for the audio signal and the video signal and distribute them to a manager via a separate data path other than the distribution path. The manager calculates a measured AV delay caused by the distribution path based on these signature curves, and then optionally corrects the measured AV delay by adjusting an in-line delay in the distribution path.
    • 本发明的实施例提供了用于非侵入式“在役”AV延迟检测和校正的系统和方法。 这些系统和方法不修改音频信号或视频信号,也不依赖于通过分配路径与音频信号或视频信号携带的任何元数据。 相反,位于沿着分布路径的各个点处的代理产生用于音频信号和视频信号的非常小的签名曲线,并且经由分配路径以外的单独的数据路径将它们分发给管理者。 管理者基于这些签名曲线计算由分配路径引起的测量的AV延迟,然后通过调整分配路径中的在线延迟来可选地校正测量的AV延迟。
    • 14. 发明授权
    • Wander gamut display
    • 漫游色域显示
    • US07610161B2
    • 2009-10-27
    • US10428361
    • 2003-05-01
    • Daniel G. Baker
    • Daniel G. Baker
    • G01R13/00
    • H04N17/00
    • A wander gamut display for perturbation analysis is created by determining from a periodic input data signal and a reference clock a frequency offset and frequency drift rate for the input signal. The frequency offset and frequency drift rate are input to respective orthogonal axes of a Cartesian display together with a wander limit bounding box that defines the wander gamut. Values that fall outside the bounding box on the display indicate wander that may result in data errors.
    • 通过从周期性输入数据信号和参考时钟确定输入信号的频率偏移和频率漂移率来创建用于扰动分析的漂移色域显示。 频率偏移和频率漂移率与定义漫游色域的漂移极限边界框一起输入到笛卡尔显示器的各个正交轴。 落在显示屏上的边框外的值指示可能导致数据错误的漂移。
    • 15. 发明申请
    • Two-way authentication with non-disclosing password entry
    • 双向认证与非公开密码输入
    • US20090144554A1
    • 2009-06-04
    • US12215938
    • 2008-07-01
    • Daniel G. Baker
    • Daniel G. Baker
    • H04L9/32
    • G06F21/445G06F21/31G06F21/36G06F2221/2119G07C9/00142G07F7/10G07F7/1041H04L63/083H04L63/0869
    • A method of two-way authentication between a user and a known host using a non-disclosing password entry system generates a matrix of characters having a random characteristic with random characteristics being selected from a set of custom symbols, pictures or patterns (rather than alpha-numeric characters) that only the user recognizes. When the user sets up an account with the known host, a subset of these characteristics is predetermined for use specifically by the user. One or more of these may additionally be used in the user's PIN or password for easy memorization, allowing the user to first authenticate the log-in screen before the user enters the PIN for user authentication to the known host. Alternatively, randomized alpha-numeric characters may be used, but with a predefined grouping or subset of the characters in a predefined position on the initial character matrix presentation. If the user doesn't see the predefined special characters or figures in the character matrix, or the particular alpha-numeric subset in the character matrix, then the log-in screen is recognized as a fake.
    • 使用非公开密码输入系统的用户和已知主机之间的双向认证的方法生成具有随机特征的字符矩阵,其随机特征是从一组自定义符号,图片或图案中选择(而不是α - 数字字符),只有用户识别。 当用户使用已知主机建立帐户时,这些特征的子集是预先确定的,以供用户专门使用。 这些中的一个或多个可以额外地用于用户的PIN或密码中以便于记忆,允许用户在用户输入用于认证主机的用户身份验证的PIN之前首先验证登录屏幕。 或者,可以使用随机的字母数字字符,但是在初始字符矩阵呈现中的预定位置中的字符的预定义分组或子集。 如果用户没有看到字符矩阵中的预定义的特殊字符或图形,或字符矩阵中的特定字母数字子集,则登录屏幕被识别为假。
    • 17. 发明授权
    • Stereoscopic video temporal frame offset measurement
    • 立体视频时间帧偏移测量
    • US09479762B2
    • 2016-10-25
    • US13310972
    • 2011-12-05
    • Daniel G. Baker
    • Daniel G. Baker
    • H04N13/00H04N13/02
    • H04N13/296H04N13/167H04N2013/0096
    • A stereoscopic video temporal frame offset measurement system uses an improved signature curve generator to generate a robust signature curve for each of the left and right image sequences of a stereo video signal. The resulting signature curves are cross-correlated over a specified correlation range to generate cross-correlation coefficients. The cross-correlation coefficients are compared to a high threshold, and a temporal frame offset is generated and displayed for each cross-correlation coefficient that exceeds the high threshold. Each new temporal frame offset result is highlighted when displayed, otherwise the last result is displayed in a background fashion.
    • 立体视频时间帧偏移测量系统使用改进的特征曲线发生器来产生用于立体视频信号的左和右图像序列中的每一个的鲁棒特征曲线。 所得到的签名曲线在指定的相关范围内是交叉相关的,以产生互相关系数。 将互相关系数与高阈值进行比较,并且对于超过高阈值的每个互相关系数,生成并显示时间帧偏移。 每个新的时间帧偏移结果在显示时突出显示,否则最后一个结果以后台方式显示。
    • 18. 发明授权
    • Stereoscopic extinction ratio test pattern
    • 立体消光比测试图案
    • US08687050B2
    • 2014-04-01
    • US12958530
    • 2010-12-02
    • Daniel G. Baker
    • Daniel G. Baker
    • H04N13/04H04N9/47
    • H04N13/327
    • A test pattern for evaluating L/R crosstalk extinction ratio in a stereoscopic 3D system has a strip of one characteristic—polarization, white, color—associated with a plurality of calibrated chips in a left eye image and a strip of a contrasting characteristic—orthogonal polarization, white, contrasting color—associated with a plurality of calibrated chips in a right eye image such that, when the two images are superimposed, the strip of one image overlays the calibrated chips of the other image. By alternately occluding one eye while observing the superimposed image with the other eye, a portion of the strip of the occluded eye image appears across the chips of the viewing eye image when there is crosstalk. The extinction ratio value associated with the chip of the viewing eye image that most closely matches the portion of the strip from the occluded eye image is an estimate of the L/R crosstalk.
    • 用于评估立体3D系统中的L / R串扰消光比的测试图案具有与左眼图像中的多个校准芯片和对比特征正交的条带的一个特征极化,白色,颜色相关联的条带 与右眼图像中的多个校准芯片相关联的偏振,白色,对比色,使得当叠加两个图像时,一幅图像的条覆盖另一图像的校准芯片。 通过交替地遮挡一只眼睛同时用另一只眼睛观察叠加的图像,当存在串扰时,遮挡眼图像的条带的一部分出现在观看眼图像的芯片之间。 与截止眼睛图像最接近条纹部分的观看眼图像的芯片相关联的消光比值是L / R串扰的估计。
    • 19. 发明申请
    • STEREOSCOPIC VIDEO TEMPORAL FRAME OFFSET MEASUREMENT
    • 立体视频时间框架偏移测量
    • US20130141528A1
    • 2013-06-06
    • US13310972
    • 2011-12-05
    • DANIEL G. BAKER
    • DANIEL G. BAKER
    • H04N13/00
    • H04N13/296H04N13/167H04N2013/0096
    • A stereoscopic video temporal frame offset measurement system uses an improved signature curve generator to generate a robust signature curve for each of the left and right image sequences of a stereo video signal. The resulting signature curves are cross-correlated over a specified correlation range to generate cross-correlation coefficients. The cross-correlation coefficients are compared to a high threshold, and a temporal frame offset is generated and displayed for each cross-correlation coefficient that exceeds the high threshold. Each new temporal frame offset result is highlighted when displayed, otherwise the last result is displayed in a background fashion.
    • 立体视频时间帧偏移测量系统使用改进的特征曲线发生器来产生用于立体视频信号的左和右图像序列中的每一个的鲁棒特征曲线。 所得到的签名曲线在指定的相关范围内是交叉相关的,以产生互相关系数。 将互相关系数与高阈值进行比较,并且对于超过高阈值的每个互相关系数,生成并显示时间帧偏移。 每个新的时间帧偏移结果在显示时突出显示,否则最后一个结果以后台方式显示。
    • 20. 发明申请
    • FLEXIBLE TIMEBASE FOR EYE DIAGRAM
    • 用于眼图的灵活时基
    • US20110274153A1
    • 2011-11-10
    • US13178803
    • 2011-07-08
    • DANIEL G. BAKERBARRY A. MCKIBBENMICHAEL D. NAKAMURAEVAN ALBRIGHTSCOTT E. ZINKMICHAEL S. OVERTON
    • DANIEL G. BAKERBARRY A. MCKIBBENMICHAEL D. NAKAMURAEVAN ALBRIGHTSCOTT E. ZINKMICHAEL S. OVERTON
    • H04B17/00
    • H04L1/205G01R13/0254G01R31/31711G01R31/31725G01R31/31727
    • 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, such as a sine wave, 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. A subtractor is then used to subtract the digital phase-locked loop feedback from the linear ramp to provide the input to the loop filter.
    • 用于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,用于等效时间采样输入串行数字信号和参考信号,例如从输入串行数字信号的细分恢复时钟导出的正弦波 。 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。 然后使用减法器从线性斜坡减去数字锁相环反馈,以向环路滤波器提供输入。