Intel Corporation

Alejandro Cohen

Shmuel Markovich Golan

Shmuel Markovich-Golan

Techniques are provided for reduction of noise and nonlinear-echo. A methodology implementing the techniques according to an embodiment includes estimating transfer functions (TFs) of echo paths of audio signals received through a microphone array. The audio signals include speech signal, additive noise, and echo, the TF estimation based on the reference signal. The method also includes cancellation of linear components of the echo, based on the echo path TFs. The method further includes estimating an inverse square root of a covariance matrix of the additive noise, whitening the echo cancelled signals, and estimating a speech path RTF associated with the speech signal, based on the whitened echo cancelled signals. The method further includes performing beamforming on the whitened signals (such as weighted MVDR beamforming), based on the echo path TFs, the speech path RTF, and the estimated inverse square root additive noise covariance matrix.

Joint beamforming and echo cancellation for reduction of noise and non-linear echo

A system, article, and method of acoustic dereverberation factoring the actual non-ideal acoustic environment.

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Gan Yavne, Israel

Alejandro Cohen