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。

公开(公告)号：US20050286785A1

公开(公告)日：2005-12-29

申请号：US10882006

申请日：2004-06-29

申请人： Scott Zink ,  Kevin Ferguson

发明人： Scott Zink ,  Kevin Ferguson

IPC分类号： G06K9/36 ,  H04N7/26 ,  H04N7/30

CPC分类号： H04N19/146 ,  H04N19/172 ,  H04N19/176 ,  H04N19/60 ,  H04N19/61 ,  H04N19/70

摘要： An area mapped compressed bit budget monitor receives a compressed video signal that represents frames of a video signal broken down into blocks of pixels with each block being represented by a bit sequence. The bits in each bit sequence are counted to produce bit counts that are translated into color and intensity values. The color and intensity values are used to present an area mapped display, with each block of a displayed frame being outlined according to the associated color and intensity value, or the outline being alternatively filled by the associated color and intensity value. The area mapped display may also include a cursor in the form of a filled block together with an associated coefficient array for the block indicated by the cursor.

摘要翻译： 区域映射的压缩位预算监视器接收压缩视频信号，该压缩视频信号表示分解为像素块的视频信号的帧，每个块由比特序列表示。 对每个位序列中的位进行计数，以产生转换为颜色和强度值的位数。 颜色和强度值用于呈现区域映射显示，其中显示的帧的每个块根据相关联的颜色和强度值被轮廓化，或轮廓被相关联的颜色和强度值替代地填充。 区域映射显示还可以包括填充块的形式的光标以及由光标指示的块的相关系数阵列。

公开(公告)号：US6151076A

公开(公告)日：2000-11-21

申请号：US21699

申请日：1998-02-10

申请人： Gilbert A. Hoffman ,  Scott Zink

发明人： Gilbert A. Hoffman ,  Scott Zink

IPC分类号： G11B20/14 ,  H03L7/08 ,  H03L7/093 ,  H03L7/183 ,  H04N5/60 ,  H04N5/12 ,  H04N5/05 ,  H04N7/12

CPC分类号： H03L7/093 ,  H03L7/183 ,  H04N21/4305 ,  H04N21/8106 ,  H04N5/602

摘要： A system for phase-locking a clock to a digital audio signal embedded within a digital video signal uses an audio extractor, frequency dividers, and an adjusted bandwidth loop filter to prevent phase jitter associated with the digital audio signal preventing the functionality of the phase-lock loop or having unacceptable effects on the generated audio sample frequency signal. Extracted audio samples are divided down and input to a phase detector. The signal is then filtered using a series of loop filters, one of which has an adjusted bandwidth to reject phase jitter. A clock then outputs the generated synthesized audio sample frequency using the output from the series of loop filters, and the synthesized frequency signal is looped back through a second frequency divider to the phase detector.

摘要翻译： 用于将嵌入在数字视频信号中的数字音频信号相位锁定时钟的系统使用音频提取器，分频器和调整后的带宽环路滤波器来防止与数字音频信号相关联的相位抖动， 锁定环路或对所生成的音频采样频率信号具有不可接受的影响。 提取的音频样本被分频并输入到相位检测器。 然后使用一系列环路滤波器对信号进行滤波，其中一个具有调整带宽以抑制相位抖动。 然后，时钟使用来自一系列环路滤波器的输出输出所生成的合成音频采样频率，并且合成频率信号通过第二分频器回送到相位检测器。