Systems and methods for fault detection and exclusion in navigational systems

    公开(公告)号:US06944541B2

    公开(公告)日:2005-09-13

    申请号:US10985858

    申请日:2004-11-10

    CPC分类号: G01S19/20 G01S19/15

    摘要: The Fault Detection and Exclusion (FDE) system for use in navigational systems that rely upon multiple ranging signals, such as GPS satellites, uses an FDE algorithm to detect, as soon as possible, whether a fault exists in a signal associated with one or more of the GPS satellites. The system makes this determination by comparing a computed residual error with a first fault detection threshold. After determining that the computed residual error has exceeded the first, relatively low, fault detection threshold, the system transmits a signal to one or more external systems indicating that one or more signals associated with the various GPS satellites may be faulty. The system then monitors horizontal estimated position error (HUL) until this value has met or exceeded a relatively high fault isolation threshold value. The system then attempts to isolate and exclude the faulty satellite from the current navigational solution.

    Method and system for distributed video compression in personal computer architecture

    公开(公告)号:US06411651B1

    公开(公告)日:2002-06-25

    申请号:US09105059

    申请日:1998-06-26

    IPC分类号: H04N712

    摘要: A method and system for compressing video data in a computer has video processing that is distributed between preprocessing hardware in a video capture/controller card and a central processing unit of the computer. Frames of video data are passed to a motion estimation unit of the preprocessing hardware. This unit generates motion information describing inter-frame changes in the video data. Next, motion-compensated temporal filtering is performed on the frames of video data using the motion information. A video frame processing unit of the controller card, used for processing video data to the monitor, is reused for the temporal filtering of the input video data. Finally, the temporally-filtered video data is passed to the central processing unit, which performs inter-frame and/or intra-frame compression with reference to the motion information. In this way, motion-compensated temporal filtering is performed, thus removing the associated noise without adding to the CPU's processing burden, but the costs associated with dedicated compression hardware are avoided by relying on the video capture capabilities in the video controller card.

    Method for choosing rate control parameters in motion-compensated transform-based picture coding scheme using non-parametric technique
    4.
    发明授权
    Method for choosing rate control parameters in motion-compensated transform-based picture coding scheme using non-parametric technique 失效
    使用非参数化技术在基于运动补偿变换的图像编码方案中选择速率控制参数的方法

    公开(公告)号:US06292589B1

    公开(公告)日:2001-09-18

    申请号:US08668153

    申请日:1996-06-21

    IPC分类号: G06K938

    摘要: A method of assigning quantization values for use during the compression of images is disclosed. The method includes constructing a non-parametric model during a training phase based on relationships between image characteristics, quantization values, and required bit resources to encode images. The model is built by considering a wide sample of images. The consideration includes determining the temporal and spatial characteristics of the images, compressing the images over a range of quantization values, and recording the resultant required bit resource on a per characterization/quantization level basis. Once built, the model may be used during real time compression by determining the characteristics of the input image and using the allocated resource to find a corresponding match in the non-parametric model. The associated quantization value is then assigned to the input image.

    摘要翻译: 公开了在压缩图像期间分配使用量化值的方法。 该方法包括基于图像特征,量化值和所需的位资源之间的关系在训练阶段中构建非参数模型以对图像进行编码。 该模型是通过考虑广泛的图像样本来构建的。 考虑包括确定图像的时间和空间特性,在一定范围的量化值上压缩图像,以及基于每个表征/量化级别记录所得到的所需位资源。 一旦构建,可以在实时压缩期间通过确定输入图像的特性并使用分配的资源在非参数模型中找到对应的匹配来使用该模型。 然后将相关联的量化值分配给输入图像。

    Self-timed programmable logic array with pre-charge circuit

    公开(公告)号:US4794570A

    公开(公告)日:1988-12-27

    申请号:US165456

    申请日:1988-03-01

    IPC分类号: H03K19/177 G11C13/00

    CPC分类号: H03K19/1772

    摘要: A programmable logic array includes a decoder section and an encoder section connected by a plurality of minterm conductors. The decoder section receives a plurality of input signals and in response selects appropriate ones of the minterm conductors. The selection of the minterm conductors enable the encoder selection to transmit a plurality of output signal on respective output conductors. The decoder and encoder sections include a plurality of stages, each controlling a minterm conductor and output conductor in response to the input signals and the selection of the minterm conductor. The stages include control transistors that are connected between a node, to which the respective minterm and output conductors are connected, and switches which enable and disable the control transistors. The nodes are initially precharged while the switches disable the respective transistors. After precharge, the switches enable the transistors in the decoder and encoder section respectively. A self timing circuit controls the switches to ensure that the switches are correctly timed.

    System and Method of Assessing the State of a Database Product for Installation Consistency
    6.
    发明申请
    System and Method of Assessing the State of a Database Product for Installation Consistency 有权
    评估安装一致性数据库产品状态的系统和方法

    公开(公告)号:US20140122446A1

    公开(公告)日:2014-05-01

    申请号:US13665739

    申请日:2012-10-31

    IPC分类号: G06F17/30

    摘要: A computer-implemented system and method performs an iterative process to assess the installation of an upgrade version of a database product for consistency with a baseline version of the database product. To assess the installation, the baseline version and the upgrade version are reconciled by modifying one or both of the baseline and upgrade versions. The modified baseline and upgrade versions are then analyzed to determine whether any remaining inconsistencies exist. Any remaining inconsistencies are then identified and classified, and reconciled. Thereafter, the process is repeated iteratively until the upgrade version is reconciled with the baseline version.

    摘要翻译: 计算机实现的系统和方法执行迭代过程以评估数据库产品的升级版本的安装,以与数据库产品的基准版本保持一致。 要评估安装,通过修改基准版本和升级版本中的一个或两个来协调基准版本和升级版本。 然后分析修改的基线和升级版本,以确定是否存在任何剩余的不一致。 然后识别和分类任何剩余的不一致,并进行对帐。 此后,迭代重复此过程,直到升级版本与基准版本进行协调。

    Method and system for distributed video compression in personal computer architecture
    10.
    发明授权
    Method and system for distributed video compression in personal computer architecture 失效
    个人电脑架构中分布式视频压缩的方法与系统

    公开(公告)号:US06980595B2

    公开(公告)日:2005-12-27

    申请号:US10179659

    申请日:2002-06-24

    摘要: A method and system for compressing video data in a computer has video processing that is distributed between preprocessing hardware in a video capture/controller card and a central processing unit of the computer. Frames of video data are passed to a motion estimation unit of the preprocessing hardware. This unit generates motion information describing inter-frame changes in the video data. Next, motion-compensated temporal filtering is performed on the frames of video data using the motion information. A video frame processing unit of the controller card, used for processing video data to the monitor, is reused for the temporal filtering of the input video data. Finally, the temporally-filtered video data is passed to the central processing unit, which performs inter-frame and/or intra-frame compression with reference to the motion information. In this way, motion-compensated temporal filtering is performed, thus removing the associated noise without adding to the CPU's processing burden, but the costs associated with dedicated compression hardware are avoided by relying on the video capture capabilities in the video controller card.

    摘要翻译: 用于在计算机中压缩视频数据的方法和系统具有分布在视频捕获/控制器卡中的预处理硬件和计算机的中央处理单元之间的视频处理。 视频数据的帧被传送到预处理硬件的运动估计单元。 该单元生成描述视频数据中帧间变化的运动信息。 接下来,使用运动信息对视频数据的帧执行运动补偿时间滤波。 用于将视频数据处理到监视器的控制器卡的视频帧处理单元被重新用于输入视频数据的时间滤波。 最后,将经过时间滤波的视频数据传送到中央处理单元,该处理单元参照运动信息执行帧间和/或帧内压缩。 以这种方式,执行运动补偿时间滤波,从而消除相关噪声,而不增加CPU的处理负担,但是通过依赖于视频控制器卡中的视频捕获能力来避免与专用压缩硬件相关的成本。