公开(公告)号：US08576970B2

公开(公告)日：2013-11-05

申请号：US13063286

申请日：2009-09-09

申请人： Graham R. Leach ,  Gordon A. Wilson ,  Rolf Sundblad

发明人： Graham R. Leach ,  Gordon A. Wilson ,  Rolf Sundblad

IPC分类号： H03D3/24

CPC分类号： H03L7/18 ,  H03L7/0891 ,  H03L7/099

摘要： A PLL circuit (1a, 1b) for generating a pixel-clock signal based on a hsync signal. The PLL circuit comprises a phase-frequency detector arranged to receive the hsync signal and a frequency divided pixel-clock signal, and generate up and down signals based on the hsync signal and the frequency-divided pixel-clock signal. A charge pump (20) is arranged to generate an output signal based on the up and down signals and a loop filter (30) is arranged to generate a frequency-control signal based on the output signal of the charge pump (20). Furthermore, a VCO (40a, 40b) is arranged to generate an oscillating signal and adjust the frequency of the oscillating signal in response to the frequency-control signal. The VCO (40a, 40b) is adapted to have a tuning range with a center frequency which is larger than or equal to 4 GHz. A programmable first frequency divider (50) is arranged to generate the pixel-clock signal by frequency division of the oscillating signal, and a programmable second frequency divider (60) is arranged to generate the frequency divided pixel-clock signal by frequency division of the pixel-clock signal.

摘要翻译： 一种用于基于hsync信号产生像素时钟信号的PLL电路（1a，1b）。 PLL电路包括相位频率检测器，被配置为接收hsync信号和分频像素时钟信号，并且基于hsync信号和分频像素时钟信号产生上下信号。 电荷泵（20）被布置成基于上下信号产生输出信号，并且环路滤波器（30）被布置成基于电荷泵（20）的输出信号产生频率控制信号。 此外，VCO（40a，40b）被布置成响应于频率控制信号产生振荡信号并调整振荡信号的频率。 VCO（40a，40b）适于具有大于或等于4GHz的中心频率的调谐范围。 可编程第一分频器（50）被布置成通过振荡信号的分频产生像素时钟信号，并且可编程第二分频器（60）被布置成通过频率分频产生分频像素时钟信号 像素时钟信号。

公开(公告)号：US08571506B2

公开(公告)日：2013-10-29

申请号：US11926474

申请日：2007-10-29

申请人： Steven G. Gronemeyer

发明人： Steven G. Gronemeyer

IPC分类号： H04B7/00 ,  H04B1/06

CPC分类号： H03L1/02 ,  G01S19/13 ,  G01S19/35 ,  H03J3/04

摘要： Systems and methods for sharing an oscillator between receivers are disclosed. A representative method (among others) of responding to a change in frequency of a voltage-controlled temperature-compensated oscillator (VCTCXO), includes: determining a new value for VCTCXO frequency; determining a time at which the new value will be applied to the VCTCXO; transmitting the time and the new value to a subsystem that uses a second receiver which shares the VCTCXO with a first receiver; and in the subsystem, updating channel context data to use the time of the change in frequency and the new value.

摘要翻译： 公开了在接收机之间共享振荡器的系统和方法。 响应于压控温度补偿振荡器（VCTCXO）频率变化的代表性方法（包括）包括：确定VCTCXO频率的新值; 确定新值将应用于VCTCXO的时间; 将时间和新值发送到使用与第一接收机共享VCTCXO的第二接收机的子系统; 并且在子系统中，更新频道上下文数据以使用频率变化的时间和新值。

公开(公告)号：US20130260799A1

公开(公告)日：2013-10-03

申请号：US13436795

申请日：2012-03-30

申请人： Ben Tarlow ,  Murray Jarvis

发明人： Ben Tarlow ,  Murray Jarvis

IPC分类号： H04W24/00 ,  H04W4/02

CPC分类号： H04W64/003 ,  G01S5/0252 ,  G01S19/42

摘要： According to certain aspects, the invention provides a method of achieving near-fingerprinting accuracy without fingerprinting database costs, via parametric representation of training data. In embodiments, this is achieved by using a parametric representation for the training data and limiting the region of applicability of the parametric model in order to mimic fingerprinting. According to certain additional aspects, an algorithm according to principles of the invention includes two separate parts, training and positioning. Training encompasses the derivation of the parametric model and region of applicability. This comprises access point position, propagation model and the window of applicability. Positioning covers the use of the derived model along with a set of fresh observations to generate a position estimate.

摘要翻译： 根据某些方面，本发明提供了一种通过训练数据的参数表示来实现近指纹精度而不指纹数据库成本的方法。 在实施例中，这通过使用训练数据的参数表示并且限制参数模型的适用范围以便模拟指纹来实现。 根据某些附加方面，根据本发明的原理的算法包括两个单独的部分，训练和定位。 培训包括推导参数模型和适用范围。 这包括接入点位置，传播模型和适用性窗口。 定位涵盖派生模型的使用以及一组新的观察结果以产生位置估计。

公开(公告)号：US08542313B2

公开(公告)日：2013-09-24

申请号：US12857343

申请日：2010-08-16

申请人： Guy Rapaport ,  Meir Tzur ,  Artemy Baxansky

发明人： Guy Rapaport ,  Meir Tzur ,  Artemy Baxansky

IPC分类号： H04N5/232 ,  H04N5/228 ,  H04N5/225

CPC分类号： H04N5/23212 ,  H04N5/2356

摘要： A device and methods are provided for calculating depth estimation for a digital imaging device are disclosed and claimed. In one embodiment, a method includes detecting a first image associated with a first focus parameter, detecting a second image associated with a second focus parameter, calculating a statistical representation of a region of interest in the first and second images, and determining a ratio for the region of interest based on the statistical representation. The method may further include determining one or more focus characteristics using a memory table based on the determined ratio for the region of interest, and calculating a focus depth for capture of image data based on the determined one or more focus characteristics associated with the memory table.

摘要翻译： 提供了一种用于计算数字成像装置的深度估计的装置和方法。 在一个实施例中，一种方法包括检测与第一焦点参数相关联的第一图像，检测与第二焦点参数相关联的第二图像，计算第一和第二图像中感兴趣区域的统计表示，以及确定 基于统计表示的兴趣区域。 该方法还可以包括：基于所确定的感兴趣区域的比例，使用存储表确定一个或多个焦点特征，以及基于所确定的与存储表相关联的一个或多个聚焦特性来计算用于捕获图像数据的聚焦深度 。

公开(公告)号：US08525900B2

公开(公告)日：2013-09-03

申请号：US13090985

申请日：2011-04-20

申请人： Haim Garten

发明人： Haim Garten

IPC分类号： H04N5/235 ,  H04N5/238 ,  G06K9/40

CPC分类号： G06F3/1454 ,  G09G5/06 ,  G09G5/14 ,  G09G2320/02 ,  G09G2320/0285 ,  G09G2340/0414 ,  G09G2340/0421 ,  G09G2340/06 ,  G09G2340/10 ,  H04N5/232 ,  H04N5/23248 ,  H04N5/2355

摘要： Techniques for creating a High Dynamic Range (HDR) image within a consumer grade digital camera from a series of images of a scene captured at different exposure levels, and displaying the HDR image on the camera's built-in display are provided. The approach employs mixing images of the series to incorporate both scene shadow and highlight details, and the removing of “ghost” image artifacts appearing in the mixed HDR image resulting from movement in the scene over the time the series images are captured. The low computational resource utilization of the image mixing and ghost removal processing operations, along with the ability to commence image mixing and ghost removal prior to the acquisition of all series images, can significantly reduce the time required to generate and display a tone mapped HDR image.

摘要翻译： 提供了在消费级数字照相机中从在不同曝光级别捕获的场景的一系列图像中创建高动态范围（HDR）图像以及在相机的内置显示器上显示HDR图像的技术。 该方法使用该系列的混合图像来并入场景阴影和高光细节，以及去除在捕获串行图像时在场景中的运动产生的混合HD​​R图像中出现的“鬼影像”图像伪影。 图像混合和重影去除处理操作的低计算资源利用以及在获取所有系列图像之前开始图像混合和重影去除的能力可以显着减少生成和显示色调映射HDR图像所需的时间 。

公开(公告)号：US08503814B2

公开(公告)日：2013-08-06

申请号：US12637526

申请日：2009-12-14

申请人： Oscar Ayzenberg ,  Vlad Fruchter

发明人： Oscar Ayzenberg ,  Vlad Fruchter

IPC分类号： G06K9/40

CPC分类号： G06T5/003 ,  G06T2207/10016 ,  G06T2207/20012

摘要： An apparatus and methods are provided for determining control parameters for image enhancement. In one embodiment a method for determining control parameters includes receiving image data for a first frame and calculating an adaptive threshold value based on the image data. The method includes determining a pixel slope distribution for a pixel window of the image data, wherein the pixel window is selected based on the adaptive threshold value and determining a spectrum estimation coefficient based on the pixel distribution, wherein the spectrum estimation coefficient is determined based on the spectral components of the image data. The method may then include determining one or more control parameters for enhancement of the image data based on the spectrum estimation coefficient, wherein the one or more control parameters relate to filtering parameters for adaptive enhancement of image data.

摘要翻译： 提供了一种用于确定用于图像增强的控制参数的装置和方法。 在一个实施例中，用于确定控制参数的方法包括接收第一帧的图像数据并基于图像数据计算自适应阈值。 该方法包括确定图像数据的像素窗口的像素斜率分布，其中基于自适应阈值选择像素窗口，并且基于像素分布来确定频谱估计系数，其中基于 图像数据的光谱分量。 该方法然后可以包括基于频谱估计系数确定用于增强图像数据的一个或多个控制参数，其中一个或多个控制参数涉及用于图像数据的自适应增强的滤波参数。

公开(公告)号：US20130169479A1

公开(公告)日：2013-07-04

申请号：US13341851

申请日：2011-12-30

申请人： Gary Lennen

发明人： Gary Lennen

IPC分类号： G01S19/29 ,  G01S19/30 ,  G01S19/24

CPC分类号： G01S19/24 ,  G01S19/246 ,  G01S19/29 ,  G01S19/30 ,  H04B1/7085 ,  H04B2201/70715

摘要： The present invention is related to location positioning systems, and more particularly, to a method and apparatus for making accuracy improvements to a GPS receiver's navigation calculations. According to a first aspect, the invention includes extreme sensitivity GNSS tracking loops. In embodiments, the tracking loops are self-bandwidth normalizing and the loop bandwidths automatically narrow with reduced CNO.

摘要翻译： 本发明涉及位置定位系统，更具体地，涉及一种用于对GPS接收机的导航计算进行精度改进的方法和装置。 根据第一方面，本发明包括极灵敏度的GNSS跟踪环路。 在实施例中，跟踪环路是自带带宽归一化，并且环路带宽随着减少的CNO而自动缩小。

公开(公告)号：US08422978B2

公开(公告)日：2013-04-16

申请号：US13339560

申请日：2011-12-29

申请人： Carey Ritchey ,  Kim E. Beumer ,  Marius Pop

发明人： Carey Ritchey ,  Kim E. Beumer ,  Marius Pop

IPC分类号： H04B1/26

CPC分类号： H03D7/161 ,  H04B1/0035 ,  H04B1/28

摘要： An agile RF tuner circuit capable of converting a wide portion of RF signal into an IF signal suitable for analog-to-digital conversion. The circuit up converts a received RF signal to a high IF signal and then down converts the high IF signal to a low IF signal. Embodiments of the RF circuit incorporate harmonic reject mixers to suppress harmonics and intermodulations typically associated with the frequency conversion process.

摘要翻译： 能够将大部分RF信号转换成适合于模数转换的IF信号的敏捷RF调谐器电路。 电路将接收的RF信号转换为高IF信号，然后将高IF信号下变频为低IF信号。 RF电路的实施例包括谐波抑制混频器以抑制通常与频率转换过程相关联的谐波和互调。

公开(公告)号：US08374433B2

公开(公告)日：2013-02-12

申请号：US13361868

申请日：2012-01-30

申请人： Yonatan Shlomo Simson ,  Artemy Baxansky

发明人： Yonatan Shlomo Simson ,  Artemy Baxansky

IPC分类号： G06K9/00

CPC分类号： H04N9/045

摘要： A device for color shading correction is provided. Local color matching is performed as follows. For each pixel of the image that is being color matched, the RGB value is treated as a one-by-three matrix, which is multiplied by a three-by-three matrix that is generated during factory calibration. The matrix product is a one-by-three matrix that is used as the RGB value for the pixel in the color matched image.

摘要翻译： 提供了一种用于色彩校正的设备。 本地颜色匹配如下进行。 对于正在进行颜色匹配的图像的每个像素，RGB值被视为一个三位矩阵，它乘以在工厂校准期间生成的三乘三矩阵。 矩阵乘积是一个三分之一的矩阵，用作彩色匹配图像中的像素的RGB值。

公开(公告)号：US08368592B2

公开(公告)日：2013-02-05

申请号：US13009277

申请日：2011-01-19

申请人： Nam Dieu Banh

发明人： Nam Dieu Banh

IPC分类号： G01S19/22 ,  G01S19/30 ,  G01S19/37

CPC分类号： G01S19/24 ,  G01S19/22 ,  G01S19/30 ,  H04B1/709

摘要： A GPS receiver for tracking a GPS signal. The receiver generates a mixed GPS signal by mixing the GPS signal with an oscillator signal, generates a first correlation signal by correlating the mixed GPS signal with a reference signal, and generates a filtered GPS signal from the GPS signal. The receiver also generates a filtered reference signal from the reference signal, generates a second correlation signal by correlating the filtered GPS signal with the filtered reference signal, and a generates a combined correlation signal by combining the first correlation signal with the second correlation signal. The receiver tracks the GPS signal by adjusting the phase of the oscillator signal based on the combined correlation signal.

摘要翻译： GPS接收机，用于跟踪GPS信号。 接收机通过将GPS信号与振荡器信号混合产生混合的GPS信号，通过将混合GPS信号与参考信号相关来产生第一相关信号，并从GPS信号产生滤波后的GPS信号。 接收机还从参考信号产生滤波后的参考信号，通过将滤波后的GPS信号与滤波后的参考信号进行相关，产生第二相关信号，并通过组合第一相关信号和第二相关信号产生组合的相关信号。 接收机通过基于组合的相关信号调整振荡器信号的相位来跟踪GPS信号。