Echo eliminating device without reference loop and method thereof

Abstract

The present disclosure provides an echo cancellation apparatus without a reference loop, which includes a fixed beamforming module configured to fix a multi-channel signal acquired by a speech acquisition unit into a plurality of first beams, superimpose the plurality of first beams and output a target signal; a blocking matrix module configured to input the multi-channel signal acquired by the speech acquisition unit into a blocking matrix for preprocessing to output a non-target signal; a cancellation module configured to perform cancellation between the target signal and the non-target signal and output a multi-beam first signal; a multi-channel dereverberation module configured to perform dereverberation on the multi-channel signal acquired by the speech acquisition unit and output a multi-channel second signal; a blind source separation module configured to perform blind source separation on the multi-channel second signal to output a multi-channel third signal, perform signal-to-noise ratio calculation on each channel of the multi-channel third signal in the frequency domain, and determine a weight of each channel of the multi-channel third signal; and a mapping module configured to map the weights to the multi-beam first signal and output a mapped multi-channel frequency-domain fourth signal.

Dependencies are inferred from the claim text.