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    DEVICE AND METHOD FOR TESTING OF DIGITAL-TO-ANALOG CONVERTER
    1.
    发明申请
    DEVICE AND METHOD FOR TESTING OF DIGITAL-TO-ANALOG CONVERTER 有权
    用于测试数字到模拟转换器的设备和方法

    公开(公告)号：US20090261999A1

    公开(公告)日：2009-10-22

    申请号：US12107502

    申请日：2008-04-22

    申请人： Ravi Ramaswami ,  Michael A. Bourland ,  Feng Zhao

    发明人： Ravi Ramaswami ,  Michael A. Bourland ,  Feng Zhao

    IPC分类号： H03M1/10

    CPC分类号： H03M1/1095 ,  H03M1/742

    摘要： A current-steering digital-to-analog converter (DAC) is tested using a test component having a relaxation oscillator with an oscillation frequency based on the output current of the DAC. A series of test values is provided in sequence to the DAC for conversion to an output current with a magnitude that varies with the test values. The test component counts the number of oscillations (“the oscillation count”) of the relaxation oscillator over a fixed duration that is substantially equal for each test value. As the number of oscillations over the fixed duration depends on the oscillation frequency of the relaxation oscillator, which in turn is based on the magnitude of the output current, the oscillation count can be used as a relative measure of the magnitude of the output current for the corresponding test value. Accordingly, the oscillation counts for the test values can be used to determine operational characteristics of the DAC.

    摘要翻译： 使用具有基于DAC的输出电流的振荡频率的张弛振荡器的测试部件来测试电流导向数模转换器（DAC）。 一系列测试值依次提供给DAC，用于转换为具有随测试值变化的幅度的输出电流。 测试组件对固定持续时间计数弛豫振荡器的振荡次数（“振荡计数”），其对于每个测试值基本相等。 由于在固定持续时间内的振荡次数取决于张弛振荡器的振荡频率，而振荡器的振荡频率又依赖于输出电流的大小，所以振荡计数可以用作输出电流幅值的相对量度 相应的测试值。 因此，可以使用测试值的振荡计数来确定DAC的工作特性。

    Device and method for testing of digital-to-analog converter
    2.
    发明授权
    Device and method for testing of digital-to-analog converter 有权
    数模转换器测试装置及方法

    公开(公告)号：US07609190B1

    公开(公告)日：2009-10-27

    申请号：US12107502

    申请日：2008-04-22

    申请人： Ravi Ramaswami ,  Michael A. Bourland ,  Feng Zhao

    发明人： Ravi Ramaswami ,  Michael A. Bourland ,  Feng Zhao

    IPC分类号： H03M1/66

    CPC分类号： H03M1/1095 ,  H03M1/742

    摘要： A current-steering digital-to-analog converter (DAC) is tested using a test component having a relaxation oscillator with an oscillation frequency based on the output current of the DAC. A series of test values is provided in sequence to the DAC for conversion to an output current with a magnitude that varies with the test values. The test component counts the number of oscillations (“the oscillation count”) of the relaxation oscillator over a fixed duration that is substantially equal for each test value. As the number of oscillations over the fixed duration depends on the oscillation frequency of the relaxation oscillator, which in turn is based on the magnitude of the output current, the oscillation count can be used as a relative measure of the magnitude of the output current for the corresponding test value. Accordingly, the oscillation counts for the test values can be used to determine operational characteristics of the DAC.

    摘要翻译： 使用具有基于DAC的输出电流的振荡频率的张弛振荡器的测试部件来测试电流导向数模转换器（DAC）。 一系列测试值依次提供给DAC，用于转换为具有随测试值变化的幅度的输出电流。 测试组件对固定持续时间计数弛豫振荡器的振荡次数（“振荡计数”），其对于每个测试值基本相等。 由于在固定持续时间内的振荡次数取决于张弛振荡器的振荡频率，而振荡器的振荡频率又依赖于输出电流的大小，所以振荡计数可以用作输出电流幅值的相对量度 相应的测试值。 因此，可以使用测试值的振荡计数来确定DAC的工作特性。

    Distance measurements between computing devices
    3.
    发明授权
    Distance measurements between computing devices 有权
    计算设备之间的距离测量

    公开(公告)号：US09170325B2

    公开(公告)日：2015-10-27

    申请号：US13599823

    申请日：2012-08-30

    申请人： Zengbin Zhang ,  David Chiyuan Chu ,  Thomas Moscibroda ,  Xiaomeng Chen ,  Feng Zhao

    发明人： Zengbin Zhang ,  David Chiyuan Chu ,  Thomas Moscibroda ,  Xiaomeng Chen ,  Feng Zhao

    IPC分类号： G01S3/80 ,  G01S11/14

    CPC分类号： G01S11/14

    摘要： Some implementations provide techniques and arrangements for distance measurements between computing devices. Some examples determine a distance between devices based at least in part on a propagation time of audio tones between the devices. Further, some examples determine the arrival time of the audio tones by performing autocorrelation on streaming data corresponding to recorded sound to determine a timing of an autocorrelation peak indicative of a detection of an audio tone in the streaming data. In some cases, cross correlation may be performed on the streaming data in a search window to determine a timing of a cross correlation peak indicative of the detection of the audio tone in the streaming data. The location of the search window in time may be determined based at least in part on the timing of the detected autocorrelation peak.

    摘要翻译： 一些实现提供了用于计算设备之间的距离测量的技术和布置。 一些示例至少部分地基于设备之间的音频音调的传播时间来确定设备之间的距离。 此外，一些示例通过对与记录的声音相对应的流数据执行自相关来确定音频音调的到达时间，以确定指示流数据中的音频音调的检测的自相关峰值的定时。 在一些情况下，可以在搜索窗口中对流数据执行互相关，以确定指示流数据中的音频音调的检测的互相关峰值的定时。 可以至少部分地基于检测到的自相关峰值的定时来确定搜索窗口在时间上的位置。

    Step detection and step length estimation
    4.
    发明授权
    Step detection and step length estimation 有权
    步长检测和步长估计

    公开(公告)号：US08831909B2

    公开(公告)日：2014-09-09

    申请号：US13240743

    申请日：2011-09-22

    申请人： Fan Li ,  Chunshui Zhao ,  Feng Zhao

    发明人： Fan Li ,  Chunshui Zhao ,  Feng Zhao

    IPC分类号： G01C22/00 ,  G01R23/00 ,  G01C21/16 ,  G06F19/00

    CPC分类号： G01C22/006 ,  G01C21/165 ,  G06F19/00

    摘要： Step detection and step length estimation techniques include detecting salient points in sensor data of one or more sensors. A step frequency is estimated based on a time interval between the detected salient points. A step length of the step may then be computed based on a nonlinear combination of the estimated step frequency and a function of the sensor data, and/or a step model. Alternatively, the step length of the step may be computed based on a combination of a nonlinear function of the estimated step frequency and a (linear or nonlinear) function of the sensor data, and/or a step model.

    摘要翻译： 步骤检测和步长估计技术包括检测一个或多个传感器的传感器数据中的突出点。 基于检测到的突出点之间的时间间隔来估计步进频率。 然后可以基于估计的步进频率和传感器数据的函数的非线性组合和/或步骤模型来计算步长的步长。 或者，可以基于估计的步进频率的非线性函数和传感器数据的（线性或非线性）函数和/或步骤模型的组合来计算步长的步长。

    Methods and apparatuses for facilitating content-based image retrieval
    6.
    发明授权
    Methods and apparatuses for facilitating content-based image retrieval 有权
    用于促进基于内容的图像检索的方法和装置

    公开(公告)号：US08571358B2

    公开(公告)日：2013-10-29

    申请号：US12982698

    申请日：2010-12-30

    申请人： Feng Zhao ,  Hao Wang

    发明人： Feng Zhao ,  Hao Wang

    IPC分类号： G06K9/54 ,  G06F7/00

    CPC分类号： G06F17/30256

    摘要： Methods and apparatuses are provided for facilitating content-based image retrieval. A method may include determining a selected target image. The method may further include generating a candidate region of interest set including one or more regions of interest within the target image. The method may additionally include determining a recommended region of interest set including one or more recommended regions of interest selected from the candidate region of interest set based at least in part upon evaluation criteria. The evaluation criteria may be determined based at least in part upon analysis of maintained region of interest-based searching history. The method may also include providing the recommended region of interest set for user selection of one or more target regions of interest from the recommended region of interest set as query criteria for searching an image library for one or more result images. Corresponding apparatuses are also provided.

    摘要翻译： 提供了用于促进基于内容的图像检索的方法和装置。 方法可以包括确定所选择的目标图像。 该方法还可以包括在目标图像内生成包括一个或多个感兴趣区域的关注集合候选区域。 该方法可以另外包括至少部分地基于评估标准来确定包括一个或多个推荐兴趣区域的兴趣区域，所述推荐区域选自所述候选区域集合。 评估标准可以至少部分地基于对维护的基于兴趣的搜索历史的区域的分析来确定。 该方法还可以包括为推荐的感兴趣区域设置用户选择一个或多个感兴趣的目标区域作为用于搜索图像库的一个或多个结果图像的查询准则的建议的兴趣区域。 还提供了相应的装置。

    CREATING INTERACTIVE ZONES
    7.
    发明申请
    CREATING INTERACTIVE ZONES 审中-公开
    创建交互区

    公开(公告)号：US20130073681A1

    公开(公告)日：2013-03-21

    申请号：US13235077

    申请日：2011-09-16

    申请人： Xiaofan Jiang ,  Jie Liu ,  Feng Zhao ,  Jeff Hsu ,  Caiquan Liu ,  Chieh-Jan Mike Liang

    发明人： Xiaofan Jiang ,  Jie Liu ,  Feng Zhao ,  Jeff Hsu ,  Caiquan Liu ,  Chieh-Jan Mike Liang

    IPC分类号： G06F15/16

    CPC分类号： G06N3/006 ,  A63F13/10 ,  A63F2300/5573 ,  A63F2300/609

    摘要： Some implementations disclosed herein provide techniques and arrangements to enable interactive zones. For example, some implementations detect that a user has entered a zone associated with a physical object, where the zone is created via magnetic induction. In response to detecting that the user has entered the zone, some implementations send a virtual object representation of the physical object to a user device (e.g., a wireless phone) associated with the user. The user may interact with the virtual object, including selecting a command associated with the virtual object. Selecting the command may cause the physical object to perform one or more actions. In some implementations, a result of the physical object performing the one or more actions is sent to the user device.

    摘要翻译： 本文公开的一些实施例提供了使交互区域能够实现的技术和布置。 例如，一些实现检测用户已经进入与物理对象相关联的区域，其中通过磁感应创建区域。 响应于检测到用户已经进入该区域，一些实现将物理对象的虚拟对象表示发送到与用户相关联的用户设备（例如，无线电话）。 用户可以与虚拟对象交互，包括选择与虚拟对象相关联的命令。 选择该命令可能导致物理对象执行一个或多个操作。 在一些实现中，执行一个或多个动作的物理对象的结果被发送到用户设备。

    Location Estimation Using Image Analysis
    10.
    发明申请
    Location Estimation Using Image Analysis 有权
    使用图像分析的位置估计

    公开(公告)号：US20120148091A1

    公开(公告)日：2012-06-14

    申请号：US13401582

    申请日：2012-02-21

    申请人： Aman Kansal ,  Feng Zhao

    发明人： Aman Kansal ,  Feng Zhao

    IPC分类号： G06K9/00

    CPC分类号： G06F17/30241 ,  G01C21/20 ,  G01C21/206 ,  G01S5/16 ,  G06F17/30247 ,  G06F17/30265 ,  G06F17/30268 ,  G06K9/4642 ,  G06K9/4652 ,  G06K9/6202

    摘要： An implementation of location estimation using image analysis is described. In this implementation, an image of a place is obtained and matched with previously stored images. The matching may be achieved by employing methods based on key feature extraction algorithm, color histogram analysis, pattern matching or other image comparison techniques. Upon determining a match, the location information associated with the image provides the location. The location information may be in the form of location tags or location keywords and the location information may be used by the user or other applications for the purposes of location determination. The technique allows for the user to enter location information. The location information may be assigned to the previously stored images residing in local and remote databases for users and applications to assign information or keywords to images.

    摘要翻译： 描述使用图像分析的位置估计的实现。 在该实现中，获得位置的图像并与先前存储的图像匹配。 可以通过采用基于关键特征提取算法，颜色直方图分析，模式匹配或其他图像比较技术的方法来实现匹配。 在确定匹配时，与图像相关联的位置信息提供位置。 位置信息可以是位置标签或位置关键字的形式，并且位置信息可以由用户或其他应用用于位置确定的目的。 该技术允许用户输入位置信息。 位置信息可以被分配给驻留在本地和远程数据库中的先前存储的图像，供用户和应用将信息或关键词分配给图像。