Channel Decorrelation For Stereo Acoustic Echo Cancellation In High-Quality Audio Communication

Abstract

In this paper, we address an important problem in high-quality audio communication systems. Acoustic echo cancellation with stereo signals is generally an under-determined problem because of the generally important correlation that exists between the left and right channels. In this paper, we present a novel method of significantly reducing that correlation without affecting the audio quality. This method is perceptually motivated and combines a shaped comb-allpass (SCAL) filter with the injection of psychoacoustically masked noise. We show that the proposed method performs significantly better than other known methods for channel decorrelation.

arXiv comment6 pages in Proceedings of Workshop on the Internet, Telecommunications and Signal Processing (WITSP), 2006. arXiv admin note: substantial text overlap with arXiv:1602.08633