Patent ID: 7764799

Claim:
A system for suppressing audio distortion, comprising: a circuit arrangement of: echo cancelling means coupled between an audio output and a distorted desired audio sensing microphone array; and a filter arrangement coupled to at least one selected from the group consisting of (a) the echo cancelling means and (b) the microphone array, the filter arrangement including filter coefficients representing at least a part of the audio distortion, the system further comprising: an at least partly mirrored circuit arrangement having components that are at least partly mirrored relative to the (i) echo cancelling means and (ii) filter arrangement of the circuit arrangement, the at least partly mirrored circuit arrangement being configured to create and to copy simulated audio distortion representative filter coefficient values into the filter coefficients of said filter arrangement, wherein the simulated audio distortion representative filter coefficient values represent correlation properties of reverberant tail parts of reverberation type audio distortion of a given sound field, further for use by the filter arrangement in suppressing reverberation type audio distortion in the given sound field.