A versatile echo-and-noise control suite for adverse environments with a user-control capability
Akihiko K. Sugiyama, Osamu Hoshuyama, Osamu Shimada, Toshiyuki Nomura, Masanori Kato, Masahiro Serizawa · 2009
This paper presents a versatile echo-and-noise control suite with a user-control capability, which is effective for nonlinear echo and impact noise. The suite consists of an acoustic echo canceller (AEC) and downlink/uplink noise suppressors (NSs). The AEC cancels both linear and nonlinear echoes based on an estimated ratio of the linear echo to the nonlinear echo with a smaller number of computations. The NSs simultaneously achieve low distortion and high suppression with accurate noise estimation. Impact noise is detected by its typical characteristics and selectively applied suppression and/or estimation depending on the speech presence probability. The downlink NS is equipped with a user-control capability to meet the user preference in the distortion-suppression trade-off. Subjective evaluation results demonstrate that this capability is useful for user-preference diversity.