Method and apparatus for design of a vector quantizer
    2.
    发明授权
    Method and apparatus for design of a vector quantizer 失效
    用于设计矢量量化器的方法和装置

    公开(公告)号:US5255346A

    公开(公告)日:1993-10-19

    申请号:US458158

    申请日:1989-12-28

    摘要: A method and apparatus for the design of a robust vector quantizer is disclosed. The initial output vector set is equal to the centroid of a training sequence of input vectors. A neural-network simulation and neighborhood functions are utilized for splitting and optimizing the output vectors. In this manner, the entire output vector set is sensitive to each input vector and therefore optimal output vector locations with respect to specified distortion criteria are obtained. The resulting vector quantizer is robust for the class of signals represented by the training sequence.

    摘要翻译: 公开了一种用于设计鲁棒矢量量化器的方法和装置。 初始输出向量集合等于输入向量的训练序列的质心。 神经网络模拟和邻域函数用于分割和优化输出向量。 以这种方式,整个输出向量集合对每个输入向量敏感,因此获得关于指定的失真准则的最佳输出向量位置。 所得到的矢量量化器对于由训练序列表示的信号类是鲁棒的。

    Telephone network apparatus and method using echo delay and attenuation
    3.
    发明授权
    Telephone network apparatus and method using echo delay and attenuation 失效
    电话网络设备和方法采用回波延迟和衰减

    公开(公告)号:US5999901A

    公开(公告)日:1999-12-07

    申请号:US990045

    申请日:1997-12-12

    摘要: The present invention provides a telephone network apparatus for performing speech recognition services in a telephone system in substantially real time. The apparatus uses a telephone channel signal to determine the echo delay of a telephone channel and then uses this delay to configure an echo cancellation filter for use in performing speech recognition. Use of echo delay in configuring the filter allows the echo cancellation function to be done using much less computational time than would be needed without its use, thereby granting a speech recognition unit greater access to a resident microprocessor to perform its function in substantially real time.

    摘要翻译: 本发明提供一种实质上实时地在电话系统中执行语音识别服务的电话网络装置。 该装置使用电话信道信号来确定电话信道的回波延迟,然后使用该延迟来配置用于执行语音识别的回声消除滤波器。 在配置滤波器中使用回波延迟允许使用比不需要使用的更少的计算时间来完成回波消除功能,从而授予语音识别单元更大的访问驻留微处理器以基本上实时地执行其功能。