A VAD-Based Variable Order Affine Projection Algorithm for Acoustic Echo Cancellation

This paper proposes a new variable order affine projection algorithm for acoustic echo cancellation. By exploiting an efficient voice activity detection technique, the proposed algorithm can distinguish the significant and insignificant input data periods. It can thus switch between the higher and lower algorithm orders in these two situations, respectively. Hence, input data reusing can enhance convergence with more input excitation and the computation cost can be saved when the input is relatively weak. Simulations results verify the effectiveness of the proposed algorithm.