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1. 发明授权

US07355655B2 Systems and methods for separating luma and chroma information in a composite video signal 有权
标题翻译：用于在复合视频信号中分离亮度和色度信息的系统和方法
公开(公告)号：US07355655B2
公开(公告)日：2008-04-08
申请号：US11135758
申请日：2005-05-24
申请人： Weider Peter Chang , Karl Renner , Ramesh M. Chandrasekaran , Steven Clynes , Jason Meiners
发明人： Weider Peter Chang , Karl Renner , Ramesh M. Chandrasekaran , Steven Clynes , Jason Meiners
IPC分类号： H04N9/66
CPC分类号： H04N9/78
摘要： Systems and method are provided for luma-chroma separation. A demodulator system demodulates a composite video signal to produce at least two baseband chroma signals. A given baseband chroma signal contains chroma information for one of a plurality of video frames comprising the composite signal. A three-dimensional (3-D) comb filter removes luma information from a given baseband chroma signal by combining sets of at least two baseband chroma signals to form a 3-D filtered baseband signal.
摘要翻译：提供了用于亮度色度分离的系统和方法。解调器系统解调复合视频信号以产生至少两个基带色度信号。给定的基带色度信号包含包含复合信号的多个视频帧之一的色度信息。三维（3-D）梳状滤波器通过组合至少两个基带色度信号的组合来从给定的基带色度信号中去除亮度信息，以形成3-D滤波的基带信号。

2. 发明授权

US07443454B2 Method for treating inter-frame motion in a composite video signal 有权
标题翻译：在复合视频信号中处理帧间运动的方法
公开(公告)号：US07443454B2
公开(公告)日：2008-10-28
申请号：US11240718
申请日：2005-10-01
申请人： Ramesh M. Chandrasekaran , Weider Peter Chang , Karl Renner
发明人： Ramesh M. Chandrasekaran , Weider Peter Chang , Karl Renner
IPC分类号： H04N9/78 , H04N5/21
CPC分类号： H04N5/144
摘要： A method for treating inter-frame motion in a series of consecutive signal frames of a composite video signal includes the steps of, for an evaluation pixel position in each frame of a test frame-set including three successive signal frames: (a) determining whether there is at least a predetermined difference in chroma component or in luma component signals at the evaluation pixel; (b) if in step (a) there is not a predetermined difference in chroma component signals or in luma component signals, determining whether a first and third frame of the test frame-set are substantially identical; (c) determining whether at least a first predetermined number of the luma or chroma component signals in the test frame-set present at least one false color; and (d) determining whether at least a second predetermined number of high frequency luma component signals exist in the test frame-set.
摘要翻译：一种用于处理复合视频信号的一系列连续信号帧中的帧间运动的方法包括以下步骤：对于包括三个连续信号帧的测试帧集合的每个帧中的评估像素位置：（a）确定是否评估像素处的色度分量或亮度分量信号中至少存在预定的差异; （b）如果在步骤（a）中色度分量信号或亮度分量信号中没有预定的差异，则确定测试帧组的第一和第三帧是否基本相同; （c）确定测试帧组中至少第一预定数量的亮度或色度分量信号是否存在至少一种假色; 和（d）确定在测试帧组中是否存在至少第二预定数量的高频亮度分量信号。

3. 发明授权

US07453525B2 Motion detector for a video display system 有权
标题翻译：用于视频显示系统的运动检测器
公开(公告)号：US07453525B2
公开(公告)日：2008-11-18
申请号：US11135799
申请日：2005-05-24
申请人： Karl Renner , Weider Peter Chang , Ramesh M. Chandrasekaran
发明人： Karl Renner , Weider Peter Chang , Ramesh M. Chandrasekaran
IPC分类号： H04N9/78 , H04N5/14
CPC分类号： H04N11/146 , H04N5/145 , H04N9/66 , H04N9/77 , H04N9/78 , H04N11/165
摘要： Systems and methods are provided for detecting motion within a composite video signal. A first chroma difference element compares an in-phase chroma component of the composite video signal to a delayed representation of the in-phase chroma component to produce a first chroma difference value for a given pixel. A second chroma difference element compares a quadrature chroma component of the composite video signal to a delayed representation of the quadrature chroma component to produce a second chroma difference value for the pixel. A parameter mapping component maps the first and second difference values to respective first and second motion parameters that indicates the degree of change in the chroma properties of the pixel. A parameter selector determines a composite motion parameter for the pixel from the first and second motion parameters.
摘要翻译：提供用于检测复合视频信号内的运动的系统和方法。第一色差元件将复合视频信号的同相色度分量与同相色度分量的延迟表示进行比较，以产生给定像素的第一色度差值。第二色差元件将复合视频信号的正交色度分量与正交色度分量的延迟表示进行比较，以产生像素的第二色度差值。参数映射组件将第一和第二差分值映射到指示像素的色度特性的变化程度的相应的第一和第二运动参数。参数选择器从第一和第二运动参数确定像素的复合运动参数。

4. 发明申请

US20120008834A1 Motion Detection in Video with Large Areas of Detail 有权
标题翻译：具有大面积细节的视频中的运动检测
公开(公告)号：US20120008834A1
公开(公告)日：2012-01-12
申请号：US13180500
申请日：2011-07-11
申请人： Ramesh M. Chandrasekaran , Fan Zhai , Weider Peter Chang
发明人： Ramesh M. Chandrasekaran , Fan Zhai , Weider Peter Chang
IPC分类号： G06K9/00
CPC分类号： H04N5/144
摘要： A method for motion detection is provided that includes determining a first motion measure for a pixel based on differences between first neighboring pixels of the pixel, determining a detail measure for the pixel, wherein the detail measure is indicative of an amount of detail in second neighboring pixels of the pixel, adapting a first coring threshold and a first gain of a first transfer function based on the detail measure, and using the adapted first transfer function to map the first motion measure to a first motion parameter.
摘要翻译：提供了一种用于运动检测的方法，其包括基于所述像素的第一相邻像素之间的差异来确定像素的第一运动度量，确定所述像素的细节度量，其中所述细节度量指示第二相邻的细节量像素的像素，基于细节度量来适配第一取芯阈值和第一传递函数的第一增益，以及使用适配的第一传递函数将第一运动测量映射到第一运动参数。

5. 发明授权

US07349033B2 Systems and methods for correcting color phase error in video systems 有权
标题翻译：用于校正视频系统中彩色相位误差的系统和方法
公开(公告)号：US07349033B2
公开(公告)日：2008-03-25
申请号：US11134985
申请日：2005-05-23
申请人： Weider Peter Chang , Ramesh M. Chandrasekaran
发明人： Weider Peter Chang , Ramesh M. Chandrasekaran
IPC分类号： H04N9/66 , H04N9/78
CPC分类号： H04N9/66 , H04N5/145 , H04N9/77 , H04N9/78 , H04N11/146 , H04N11/165
摘要： Systems and methods are provided for correcting color phase error in a video decoder system. A demodulator system demodulates the composite input signal and the at least one delayed signal to produce sets of baseband chroma components based on a phase correction value. Color phase correction logic determines the phase correction value for the demodulator system based upon characteristics of the baseband chroma components associated with a series of at least two consecutive frames.
摘要翻译：提供了用于校正视频解码器系统中的彩色相位误差的系统和方法。解调器系统基于相位校正值来解调复合输入信号和至少一个延迟信号以产生基带色度分量集合。彩色相位校正逻辑基于与一系列至少两个连续帧相关联的基带色度分量的特性来确定解调器系统的相位校正值。

6. 发明授权

US06970038B2 Switching scheme to improve linearity and noise in switched capacitor stage with switched feedback capacitor 有权
标题翻译：开关电容器开关电容器级提高线性度和噪声的开关方案
公开(公告)号：US06970038B2
公开(公告)日：2005-11-29
申请号：US10742183
申请日：2003-12-19
申请人： Ramesh M. Chandrasekaran
发明人： Ramesh M. Chandrasekaran
IPC分类号： H03F1/02 , H03F1/14 , H03F3/00
CPC分类号： H03F3/005
摘要： A switch capacitor amplifier using a “bottom plate sampling” type arrangement in the feedback network to mitigate the reduction in linearity due to feedback switch charge injection. The switch (18A) connecting the feedback capacitor (Cf) to the opamp (15) input is opened prior to the switch (19A) connecting the feedback capacitor (Cf) to the output such that the charge injected into the opamp input nodes come from the switch connected to the opamp input, and is independent of the signal value to the first order as the switches are at the opamp input common mode voltage.
摘要翻译：在反馈网络中使用“底板采样”型布置的开关电容放大器，以减轻由于反馈开关电荷注入引起的线性的减小。在将反馈电容器（Cf）连接到输出端的开关（19A）之前，将反馈电容器（Cf）连接到运算放大器（15）输入端的开关（18A）被打开，使得注入到运算放大器输入节点来自连接到运算放大器输入的开关，并且与开关处于运算放大器输入共模电压时的信号值无关。

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