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1. 发明申请

US20110274153A1 FLEXIBLE TIMEBASE FOR EYE DIAGRAM 有权
标题翻译：用于眼图的灵活时基
公开(公告)号：US20110274153A1
公开(公告)日：2011-11-10
申请号：US13178803
申请日：2011-07-08
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
IPC分类号： H04B17/00
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, 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.
摘要翻译：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。

2. 发明授权

US07038711B2 Audio processing using a video rasterizer 有权
标题翻译：使用视频光栅化器进行音频处理
公开(公告)号：US07038711B2
公开(公告)日：2006-05-02
申请号：US10359866
申请日：2003-02-07
申请人： Evan Albright
发明人： Evan Albright
IPC分类号： H04N17/00
CPC分类号： H04N17/00 , H04N5/60
摘要： Audio processing using a video rasterizer allows simultaneous display of both audio and video data on the same raster display. Audio samples are clocked into a buffer memory, such as a first-in, first-out (FIFO) buffer, by an audio clock and clocked out of the buffer memory by a rasterizer (system) clock to allow the audio data to cross over from the audio clock domain to the video clock domain. The audio data is then upsampled by a sample ratio converter/interpolator before being processed by a video display engine. The video display engine includes a polyphase filter for upsampling display data for input to a rasterizer from which the data is read for display.
摘要翻译：使用视频光栅化器的音频处理允许在同一光栅显示器上同时显示音频和视频数据。音频采样通过音频时钟输入到诸如先进先出（FIFO）缓冲器的缓冲存储器中，并通过光栅器（系统）时钟从缓冲存储器输出，以允许音频数据跨越从音频时钟域到视频时钟域。然后在由视频显示引擎处理之前，通过采样率转换器/内插器对音频数据进行上采样。视频显示引擎包括用于对显示数据进行上采样的多相滤波器，用于输入到光栅器，数据从该扫描器读取以便显示。

3. 发明授权

US08355469B2 Flexible timebase for eye diagram 有权
标题翻译：眼图的灵活时基
公开(公告)号：US08355469B2
公开(公告)日：2013-01-15
申请号：US13178803
申请日：2011-07-08
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
IPC分类号： H04L27/00 , H03K9/00
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. A subtractor then subtracts the digital phase-locked loop feedback 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和从输入串行数字信号的细分恢复时钟导出的参考信号的等效时间采样。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。减法器然后从线性斜坡减去数字锁相环反馈，以将输入提供给环路滤波器。

4. 发明授权

US08184747B2 Flexible timebase for EYE diagram 有权
标题翻译： EYE图灵活时基
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
IPC分类号： H04L27/00 , H04B3/46
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。

5. 发明授权

US07268783B2 Image alias rejection using shaped statistical filtering 有权
标题翻译：使用形状统计滤波的图像别名排除
公开(公告)号：US07268783B2
公开(公告)日：2007-09-11
申请号：US09992060
申请日：2001-11-21
申请人： Robert W. Parish , Scott E. Zink , Evan Albright
发明人： Robert W. Parish , Scott E. Zink , Evan Albright
IPC分类号： G06T11/20
CPC分类号： G09G5/20 , G06T5/002 , G06T5/20 , G06T2200/12
摘要： Image alias rejection when converting a high resolution rasterized waveform to a lower resolution rasterized waveform for display uses a statistical filter. The statistical filter provides a shaped probability density function either by combining the outputs of multiple random number generators, such as linear feedback shift registers, or by using a corresponding look-up table to produce a dither signal. The statistical filter may be applied to one or both of the dimensional values for each data point of the high resolution rasterized waveform by combining the dimensional values with the dither signal. The resulting filtered dimensional values may then be subsampled, such as by truncation, to produce values for a lower resolution rasterized waveform display.
摘要翻译：将高分辨率光栅波形转换为较低分辨率的光栅波形以进行显示时，图像别名拒绝使用统计滤波器。统计滤波器通过组合多个随机数发生器的输出（诸如线性反馈移位寄存器）或通过使用相应的查找表来产生抖动信号来提供成形的概率密度函数。统计滤波器可以通过将尺寸值与抖动信号组合来应用于高分辨率光栅化波形的每个数据点的一个或两个维度值。然后可以例如通过截断对所得滤波的维数值进行二次采样，以产生较低分辨率光栅化波形显示的值。

6. 发明申请

US20070121714A1 Flexible timebase for EYE diagram 有权
标题翻译： EYE图灵活时基
公开(公告)号：US20070121714A1
公开(公告)日：2007-05-31
申请号：US11274687
申请日：2005-11-14
申请人： Daniel Baker , Barry McKibben , Michael Nakamura , Evan Albright , Scott Zink , Michael Overton
发明人： Daniel Baker , Barry McKibben , Michael Nakamura , Evan Albright , Scott Zink , Michael Overton
IPC分类号： H04B17/00 , H04B3/46 , H04Q1/20
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, 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.
摘要翻译：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。

7. 发明申请

US20050259183A1 Video field rate persistence 有权
标题翻译：视频场速率持续
公开(公告)号：US20050259183A1
公开(公告)日：2005-11-24
申请号：US10772727
申请日：2004-02-04
申请人： Kevin Ivers , Evan Albright
发明人： Kevin Ivers , Evan Albright
IPC分类号： G01R13/00 , H04N5/213 , H04N5/44
CPC分类号： H04N7/0132 , H04N5/4448
摘要： A video field rate persistence is provided for a video waveform display where multiple video components are displayed simultaneously, one component being updated per field interval. A persistence count is assigned to each pixel in a circular field buffer which is divided equally into a number of sub-buffers representing a portion of a display raster, one for each component. The persistence count is updated for each update of the circular field buffer with the pixel values being maintained until the persistence count equals a maximum value, at which point the pixel values for that component are updated with new pixel values. In this manner the display pixels for each component are updated every X video fields and are maintained at their prior values between updates to provide a flicker free display without temporal separation.
摘要翻译：为视频波形显示提供视频场速率持久性，其中同时显示多个视频分量，每个场间隔更新一个分量。将持久性计数分配给圆形场缓冲器中的每个像素，其平均分配成表示显示栅格的一部分的多个子缓冲器，每个子缓冲器对于每个组件一个。针对像素值被维持的循环字段缓冲器的每个更新更新持久性计数，直到持久性计数等于最大值，此时该组件的像素值被更新为新的像素值。以这种方式，每个X视频场更新每个组件的显示像素，并且在更新之间保持其先前的值，以提供无闪烁的显示而不需要时间间隔。

8. 发明授权

US07154532B2 Video field rate persistence 有权
标题翻译：视频场速率持续
公开(公告)号：US07154532B2
公开(公告)日：2006-12-26
申请号：US10772727
申请日：2004-02-04
申请人： Kevin T. Ivers , Evan Albright
发明人： Kevin T. Ivers , Evan Albright
IPC分类号： H04N17/02 , G01R13/02 , G06T11/20
CPC分类号： H04N7/0132 , H04N5/4448
摘要： A video field rate persistence is provided for a video waveform display where multiple video components are displayed simultaneously, one component being updated per field interval. A persistence count is assigned to each pixel in a circular field buffer which is divided equally into a number of sub-buffers representing a portion of a display raster, one for each component. The persistence count is updated for each update of the circular field buffer with the pixel values being maintained until the persistence count equals a maximum value, at which point the pixel values for that component are updated with new pixel values. In this manner the display pixels for each component are updated every X video fields and are maintained at their prior values between updates to provide a flicker free display without temporal separation.
摘要翻译：为视频波形显示提供视频场速率持久性，其中同时显示多个视频分量，每个场间隔更新一个分量。将持久性计数分配给圆形场缓冲器中的每个像素，其平均分配成表示显示栅格的一部分的多个子缓冲器，每个子缓冲器对于每个组件一个。针对像素值被维持的循环字段缓冲器的每个更新更新持久性计数，直到持久性计数等于最大值，此时该组件的像素值被更新为新的像素值。以这种方式，每个X视频场更新每个组件的显示像素，并且在更新之间保持其先前的值，以提供无闪烁的显示而不需要时间间隔。

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