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    Echo canceller having a series arrangement of adaptive filters with individual update control strategy
    1.
    发明申请
    Echo canceller having a series arrangement of adaptive filters with individual update control strategy 审中-公开
    回波消除器具有具有单独更新控制策略的自适应滤波器的串联布置

    公开(公告)号：US20070116255A1

    公开(公告)日：2007-05-24

    申请号：US10596319

    申请日：2004-11-25

    申请人： Rene Derkx ,  Ivo Merks ,  Cornelis Janse

    发明人： Rene Derkx ,  Ivo Merks ,  Cornelis Janse

    IPC分类号： H04M9/08

    CPC分类号： H04B3/237 ,  H04B3/231

    摘要： Disclosed is an echo canceller comprising two or more adaptive filters for calculating echo estimates, whereby the adaptive filters each have adaptation control mechanisms for applying individual update control criteria. The adaptive filters are arranged in series. Each of the adaptation control mechanisms of the adaptive filters may apply individual update control criteria for both direct echo and diffuse echo. Several step-size reduction strategies are presented.

    摘要翻译： 公开了一种回波消除器，其包括用于计算回波估计的两个或更多个自适应滤波器，由此自适应滤波器各自具有用于应用各个更新控制标准的适配控制机制。 自适应滤波器串联布置。 自适应滤波器的每个自适应控制机制可以针对直接回波和弥散回波应用各自的更新控制标准。 提出了几个步骤缩小策略。

    Echo canceller with model mismatch compensation
    2.
    发明申请
    Echo canceller with model mismatch compensation 审中-公开
    具有模型不匹配补偿的回波消除器

    公开(公告)号：US20050175129A1

    公开(公告)日：2005-08-11

    申请号：US10520870

    申请日：2003-06-23

    申请人： David Antoine Roovers ,  Rene Derkx ,  Cornelis Janse

    发明人： David Antoine Roovers ,  Rene Derkx ,  Cornelis Janse

    IPC分类号： H04M1/60 ,  H04B3/23 ,  H04M9/08 ,  H04B1/10

    CPC分类号： H04M9/082

    摘要： An interference canceller is described, comprising an adaptive filter for modeling an interference, such as an echo or noise, and a spectral processor for processing the modeled interference together with near end speech and the interference. The interference canceller further comprises an interference model mismatch compensator coupled to the adaptive filter for providing a mismatch signal to the spectral processor, said mismatch signal showing a speech independent decay. With the model mismatch signal of the interference canceller the interference power spectrum can be estimated very accurately leading to a significant convergence improvement of the acoustic canceller. Especially in the initial convergence phase at the start of a communication session a high quality operation of the acoustic canceller is achieved, which is important as this determines the first quality impression of the user.

    摘要翻译： 描述了一种干扰消除器，其包括用于对干扰进行建模的自适应滤波器，例如回波或噪声，以及用于处理建模的干扰以及近端语音和干扰的频谱处理器。 所述干扰消除器还包括耦合到所述自适应滤波器的干扰模型不匹配补偿器，用于向所述频谱处理器提供失配信号，所述失配信号表示语音独立衰减。 利用干扰消除器的模型不匹配信号，可以非常精确地估计干扰功率谱，导致声消除器的显着收敛改善。 特别是在通信会话开始时的初始收敛阶段，实现了声消除器的高质量操作，这是重要的，因为这确定了用户的第一质量印象。