公开(公告)号：US20020060637A1

公开(公告)日：2002-05-23

申请号：US09954111

申请日：2001-09-12

Applicant: Kromos Technology, Inc.

Inventor： John Byrnes ,  Matthew Cushman ,  Aleksandar Ignjatovic

IPC: H03M001/12

CPC classification number: H03M1/207

Abstract: The present invention relates to signal processing and, more particularly, to the use of local signal behavior parameters for the description of signals within sampling windows. Improved accuracy in local signal representation is achievable by using appropriate windowing functions within the local sampling windows where such windowing functions approximately compensate for truncation errors arising in finite representations of the exact signal. Other embodiments include windowing functions approximately compensating for the expected noise values that tend to corrupt the signal. Improved accuracy in local signal representations employing chromatic derivatives are described.

Abstract translation: 本发明涉及信号处理，更具体地，涉及使用本地信号行为参数来描述采样窗口内的信号。 通过在局部采样窗口内使用适当的窗口函数来实现本地信号表示的改进，这些窗口函数近似补偿了精确信号的有限表示中产生的截断误差。 其他实施例包括近似补偿倾向于损坏信号的预期噪声值的窗口功能。 描述使用色差导数的本地信号表示的精度提高。

公开(公告)号：US20020190886A1

公开(公告)日：2002-12-19

申请号：US09905322

申请日：2001-07-13

Applicant: Kromos Technology, Inc.

Inventor： Aleksandar Ignjatovic ,  Nicholas A. Carlin

IPC: H03M001/12

CPC classification number: H03M1/207

Abstract: A method and a system for acquiring local signal behavior parameters (LSBPs) of a band-limited (BL) signa, for representing and processing the signal, wherein the LSBPs encode the signal's local behavior in between Nyquist rate points. Preferably, a section of a BL signal within a sampling window is represented as a truncated series of order n at a sampling moment within the sampling window. The truncated series having nnull1 LSBPs as its coefficients, encoding the signal's local behavior between Nyquist rate points. Compared to the conventional approach that encodes a signal's behavior by signal samples taken at Nyquist rate points, the invention encodes more signal behavior. Discrete signal samples are obtained from the signal. The LSBPs are solved numerically such that the interpolated values of the truncated series provide the least-square fit with the discrete signal samples. The LSBPs are repectively the values of chromatic differential operators of order 0 to order n evaluated at the sampling moment.

Abstract translation: 一种用于获取带限制（BL）信号的本地信号行为参数（LSBP）的方法和系统，用于表示和处理信号，其中LSBP对奈奎斯特速率点之间的信号的局部行为进行编码。 优选地，采样窗口内的BL信号的一部分在采样窗口内的采样时刻被表示为阶数为n的截断系列。 截距序列具有n + 1个LSBP作为其系数，对奈奎斯特速率点之间的信号的局部行为进行编码。 与通过在奈奎斯特速率点拍摄的信号样本对信号行为进行编码的常规方法相比，本发明编码更多的信号行为。 从信号获得离散信号样本。 LSBP被数值求解，使得截断序列的插值提供与离散信号样本的最小二乘拟合。 LSBP分别是在采样时刻评估的阶数为0到阶n的色差算子的值。