利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

7 条记录 (耗时 0.015 秒)

    Uniform discrete fourier transform filter parameter encoder
    4.
    发明授权
    Uniform discrete fourier transform filter parameter encoder 失效
    均匀离散傅里叶变换滤波器参数编码器

    公开(公告)号：US5870436A

    公开(公告)日：1999-02-09

    申请号：US778054

    申请日：1997-01-02

    申请人： James C. Kolanek ,  Thomas A. Bryan

    发明人： James C. Kolanek ,  Thomas A. Bryan

    IPC分类号： G01S7/292 ,  G01S7/02 ,  H04B1/10 ,  H04B1/16 ,  H03K9/00 ,  H04L29/06

    CPC分类号： G01S7/021

    摘要： The invention is embodied in a parameter encoder for identifying selected parameters of a digitally sampled incoming signal lying within a receiver bandwidth, wherein the receiver bandwidth is divided into plural contiguous frequency channels, each channel having a channel bandwidth, whereby the incoming signal is divided into plural channelized signals lying in respective ones of the plural frequency channels, the parameter encoder includes plural channel processors connected to receive respective ones of the channelized signals, each of the channel processors including Fourier transform apparatus for producing a frequency value and an amplitude value for each sample of the respective channelized signal. The parameter encoder embodying the invention further includes a channel arbitrator including comparator apparatus for comparing the amplitude value with a predetermined threshold, comparing the amplitude value with the corresponding amplitude values of adjacent ones of the channels and comparing the frequency value with corresponding frequency values of adjacent ones of the channels, and processor apparatus for sensing whether a detected signal lies in the respective channel based upon at least one of: (a) determination of a corresponding amplitudes values of the respective channel and its adjacent neighbor channels relative to the predetermined threshold, (b) determination of predominance of the frequency value over corresponding frequency values of adjacent neighbor channels, (c) determination of a difference between the frequency value and that of an adjacent neighbor channel exceeding a predetermined frequency threshold.

    摘要翻译： 本发明体现在用于识别位于接收机带宽内的数字采样输入信号的选定参数的参数编码器中，其中接收机带宽被划分成多个连续的频道，每个信道具有信道带宽，从而将输入信号分成 多个信道化信号位于多个频道中的相应信号中，参数编码器包括连接以接收相应信道化信号的多个信道处理器，每个信道处理器包括用于产生频率值的傅立叶变换装置和每个 各个信道化信号的采样。 实施本发明的参数编码器还包括信道仲裁器，其包括用于将振幅值与预定阈值进行比较的比较器装置，将振幅值与相邻频道的对应振幅值进行比较，并将频率值与相邻频率值相对应的频率值进行比较 信道中的一个以及用于基于以下各项中的至少一个来感测检测信号是否位于相应信道中的处理器装置：（a）相对于预定阈值确定相应信道及其邻近相邻信道的对应幅度值， （b）确定频率值相对于邻近相邻信道的相应频率值的优势，（c）确定频率值与超过预定频率阈值的邻近相邻信道的频率值之间的差异。

    High-resolution three, dimensional ultrasound imaging device
    5.
    发明授权
    High-resolution three, dimensional ultrasound imaging device 失效
    高分辨率三维超声成像装置

    公开(公告)号：US5673697A

    公开(公告)日：1997-10-07

    申请号：US637162

    申请日：1996-04-24

    申请人： Thomas A. Bryan ,  Brian E. Holtz ,  Gilbert F. Perleberg ,  Francis P. Diani ,  George S. Hardie ,  James C. Robertson

    发明人： Thomas A. Bryan ,  Brian E. Holtz ,  Gilbert F. Perleberg ,  Francis P. Diani ,  George S. Hardie ,  James C. Robertson

    IPC分类号： A61B8/14 ,  G01S15/89 ,  A61B8/00

    CPC分类号： A61B8/483 ,  A61B8/14 ,  G01S15/8993 ,  Y10S128/916

    摘要： An acoustic imaging device for providing an image of a body in a medium, includes a plurality of acoustic transmit elements and a plurality of acoustic receive elements, an apparatus for activating one of the transmit elements to generate an ultrasonic signal, an apparatus to selectively receive and record from each of the receive elements a set of data representing a phase, amplitude and transit time of the ultrasonic signal, a first computing apparatus for calculating a velocity map of propagation velocity values in each of a plurality of volume elements including the body and the medium using the data set, and a second computing apparatus for calculating a reflectance map, including a coherent sum of reflectance values at selected points in the plurality of volume elements using the data set.

    摘要翻译： 一种用于在介质中提供身体的图像的声学成像装置，包括多个声发射元件和多个声接收元件，用于激活所述发射元件之一以产生超声波信号的装置，用于选择性地接收 并且从每个接收元件记录表示超声波信号的相位，幅度和渡越时间的一组数据，第一计算装置，用于计算包括身体的多个体积元素中的每一个中的传播速度值的速度图，以及 使用该数据组的介质，以及第二计算装置，用于计算反射率图，该反射率图包括使用该数据集在多个体积元素中的选定点处的反射率的相干和。