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    • 3. 发明申请
    • AUTOMATED TEST INPUT GENERATION FOR WEB APPLICATIONS
    • 自动测试输入生成WEB应用程序
    • US20090125976A1
    • 2009-05-14
    • US12249646
    • 2008-10-10
    • Gary WassermannDachuan YuAjay ChanderDinakar DhurjatiHiroshi Inamura
    • Gary WassermannDachuan YuAjay ChanderDinakar DhurjatiHiroshi Inamura
    • G06F9/44G06F21/00
    • G06F11/3688G06F8/00
    • A method and apparatus is disclosed herein for automated test input generation for web applications. In one embodiment, the method comprises performing a source-to-source transformation of the program; performing interpretation on the program based on a set of test input values; symbolically executing the program; recording a symbolic constraint for each of one or more conditional expressions encountered during execution of the program, including analyzing a string operation in the program to identify one or more possible execution paths, and generating symbolic inputs representing values of variables in each of the conditional expressions as a numeric expression and a string constraint including generating constraints on string values by modeling string operations using finite state transducers (FSTs) and supplying values from the program's execution in place of intractable sub-expressions; and generating new inputs to drive the program during a subsequent iteration based on results of solving the recorded string constraints.
    • 本文公开了用于web应用的自动化测试输入生成的方法和装置。 在一个实施例中,该方法包括执行程序的源到源转换; 基于一组测试输入值对程序执行解释; 象征性地执行程序; 记录在执行程序期间遇到的一个或多个条件表达中的每一个的符号约束,包括分析程序中的字符串操作以识别一个或多个可能的执行路径,以及生成表示每个条件表达式中的变量值的符号输入 作为数字表达式和字符串约束,包括通过使用有限状态转换器(FST)对字符串操作建模并提供来自程序执行的值代替难处理的子表达式来生成字符串值的约束; 并且基于解决记录的字符串约束的结果,生成新的输入以在随后的迭代期间驱动程序。
    • 7. 发明申请
    • Nonlinear, in-the-loop, denoising filter for quantization noise removal for hybrid video compression
    • 用于混合视频压缩的量化噪声去除的非线性,在环,去噪滤波器
    • US20060153301A1
    • 2006-07-13
    • US11331814
    • 2006-01-12
    • Onur Guleryuz
    • Onur Guleryuz
    • H04N11/02H04N7/12H04N11/04H04B1/66
    • H04N19/86H04N19/117H04N19/159H04N19/18H04N19/192H04N19/61H04N19/82
    • A method and apparatus is disclosed herein for using an in-the-loop denoising filter for quantization noise removal for video compression. In one embodiment, the video encoder comprises a transform coder to apply a transform to a residual frame representing a difference between a current frame and a first prediction, the transform coder outputting a coded differential frame as an output of the video encoder; a transform decoder to generate a reconstructed residual frame in response to the coded differential frame; a first adder to create a reconstructed frame by adding the reconstructed residual frame to the first prediction; a non-linear denoising filter to filter the reconstructed frame by deriving expectations and performing denoising operations based on the expectations; and a prediction module to generate predictions, including the first prediction, based on previously decoded frames.
    • 本文公开了一种使用用于视频压缩的量化噪声去除的环路去噪滤波器的方法和装置。 在一个实施例中,视频编码器包括变换编码器,用于将变换应用于表示当前帧和第一预测之间的差的残差帧,变换编码器输出编码差分帧作为视频编码器的输出; 变换解码器,用于响应于编码的差分帧产生重建的残余帧; 第一加法器,用于通过将所述重建的残差帧加到所述第一预测值来创建重构帧; 一个非线性去噪滤波器,通过导出预期并根据预期执行去噪操作来过滤重构帧; 以及预测模块,用于基于先前解码的帧来生成包括第一预测的预测。
    • 9. 发明申请
    • Apparatus and method for estimating a plurality of channels
    • 用于估计多个通道的装置和方法
    • US20050147025A1
    • 2005-07-07
    • US11038674
    • 2005-01-19
    • Gunther Auer
    • Gunther Auer
    • H04J99/00H04B1/707H04J11/00H04L1/06H04L25/02H04L27/26
    • H04L25/0226H04B7/0684H04B2201/70701H04L1/0618H04L25/0204H04L27/2647
    • An apparatus for estimating a plurality of channels from a plurality of distinct transmitting points, wherein an input signal includes a super position of signals based on a first pilot sequence transmittable from a first transmitting point and on a second pilot sequence transmittable from a second transmitting point, the first pilot sequence and the second pilot sequence having a phase shift to each other, comprises a transformer, which is operative to translate phase shifts between the first and the second pilot sequence into a delay, so that a first group of a set of discrete values of the transformed signal includes channel information of a first channel and that a second group of a set of discrete values includes channel information of a second channel, a selector for selecting the first group from the set of discrete values and for selecting the second group from the set of discrete values to obtain selected groups, and means for determining channel information for the plurality of channels based on the selected groups. The selection of groups at the output of the transformer for obtaining channel information for the channel allows the construction of a simplified receiver.
    • 一种用于从多个不同的发送点估计多个信道的装置,其中输入信号包括基于从第一发送点可发送的第一导频序列和可从第二发送点发送的第二导频序列的信号的超位置 具有彼此相移的第一导频序列和第二导频序列包括变换器,其可操作以将第一和第二导频序列之间的相移转换为延迟,使得第一组一组 变换信号的离散值包括第一信道的信道信息,并且一组离散值的第二组包括第二信道的信道信息,选择器,用于从该组离散值中选择第一组,并选择第二信道 组从离散值集合获得所选择的组,以及用于确定多个信道的信道信息的装置 基于选定组的频道。 在变压器的输出处选择用于获得通道的通道信息的组允许构造简化的接收器。