STEREOPHONIC ACOUSTIC ECHO CANCELLER WITH PRE-PROCESSING — SECOND-ORDER PRE-PROCESSING FILTER AND ITS CONVERGENCE —
Akihiro Hirano, Kenji Nakayama, Kazue Takebe · 2003
This paper proposes a stereophonic acoustic echo canceller with randomly time-varying second-order pre-processing filters. A quantitative approach for the convergence speed assessment by using time-averaged correlation matrix is also introduced. Simulation results show that the convergence speed of the proposed algorithm is more than twice as fast as that of a conventional pre-processor. The quantitative approach provides us with a good overview for the convergence speed assessments. Room A G1 x ( n) x1 ( n) F1,k e1 ( n) e2 ( n) echo canceller ( n) ( n) w1,2 ( n)