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WebRtc中的AEC算法

于 2022-01-30 发布 文件大小:1.96 MB
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回声消除本质上就是把输出信号和它产生的回声信号之间建立一个回声数学模型,利用开始的数据训练这个模型的参数。在远端有说话,但近端没有说话的时候,录音应该是静音,即回声完全消除。所以算法就朝着这个方向努力,一旦回声为0,则滤波器收敛。自适应滤波器算法多种多样,但是目前流行的还是最经典的LMS和NLMS,NLMS是LMS的优化 。 判断标准:收敛速度快,运算复杂度低,稳定性好,失调误差小

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