The echo canceller includes an adaptive finite impulse response filter that generates an adaptive filter weight vector.此迴音消除系统由一适应性有限脉冲响应滤波器所组成，它能产生一组适应性滤波器权值向量。
The first adaptive filter is used as a preconditioning stage so that its output signal has the requisite correlation pro第一级自适应滤波器作为预处理级，使信号获得较好的相关性和信噪比，确保第二级自适应滤波器获得更优的性能。