参考文献:

[1] WEIGHTED RECURSIVE LEAST SQUARE FILTER AND NEURAL NETWORKBASED RESIDUAL ECHO SUPPRESSION FOR THE AEC-CHALLENGE

[2] NN3A: NEURAL NETWORK SUPPORTED ACOUSTIC ECHO CANCELLATION, NOISE SUPPRESSION AND AUTOMATIC GAIN CONTROL FOR REAL-TIME COMMUNICATIONS

参考视频:https://www.bilibili.com/video/BV1dE421K74P/?spm_id_from=333.999.0.0&vd_source=77c874a500ef21df351103560dada737

FSMN类似于FIR滤波器, 即输出由当前输入和历史的输入加权求和

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