分段块频域自适应滤波器算法

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PBFDAF，详细介绍WebRTC中自适应滤波器的工作流程以及计算公式Patent Application Publication Aug 8, 2002 Sheet 2 of 13 US 2002/0106016A12022X[kI50%over apF26XK-1[rN]NNXO IKNI3232米3634363634AWIN]WENK2N2a2NY INI(P[N]432N[:N26F∠424NLKNIelkrIK-N+1F|G.2Patent Application Publication Aug 8, 2002 Sheet 3 of 13 US 2002/0106016A1Patent Application Publication Aug 8, 2002 Sheet 4 of 13 US 2002/0106016A1Gradient- constraint702N58Z心NW2[KN0NF|G.4Gracient-constraini56ZAINNIW2[KNIF|G.5342NIKNI505680rectangular L84astralnINI2N(X2)*(KNIFIGPatent Application Publication Aug 8, 2002 Sheet 5 of 13 US 2002/0106016A1s岂子8Patent Application Publication Aug 8, 2002 Sheet 6 of 13 US 2002/0106016A1CorrectCorrect(Linear) CircularCircular Linear) Circularpartapart partoartWZ[NNI1 N 3NF|G.92NW2N1十IKNN3A12N-1N3,2N2NB281xN]B3E2241NN3M12N-1N3,2NNF|G.10B2B1X 2NIKN2N2N[EN0 W2N2NκN]backward2N2NκN]N3,2NNF|G.11Patent Application Publication Aug 8, 2002 Sheet 7 of 13 US 2002/0106016A1B3B22N+IANI2N2NW尤N]12N 2NW[κN]+1i( forward):2N.1WN 2N-11NF|G.12CorrectCircular Linear )Circularpart partpartKw IKNWINIF|G.13Patent Application Publication Aug 8, 2002 Sheet 8 of 13 US 2002/0106016A11001022NWN(:+1N]02NIN]+W2 KN]+2NKNI.[KN +C 2NIrN+11041102NCH IKNIN108110F|G.14F|G.15Patent Application Publication Aug 8, 2002 Sheet 9 of 13 US 2002/0106016A1100102W4IK+1NIF(G 2N 72NT KN +W 2Nkn1082N[κN]C[NJ+C,2N[κcNi+1110c2NκN](6F|G.161:2)」④F|G.17