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

TL;DR
This paper introduces a perceptually motivated method combining a SCAL filter and psychoacoustically masked noise to effectively reduce stereo channel correlation, improving acoustic echo cancellation in high-quality audio systems.
Contribution
The paper presents a novel decorrelation technique that significantly outperforms existing methods without compromising audio quality.
Findings
Significantly improved channel decorrelation performance
Effective reduction of stereo channel correlation
Maintains high audio quality during decorrelation
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.
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Taxonomy
TopicsSpeech and Audio Processing · Advanced Adaptive Filtering Techniques · Hearing Loss and Rehabilitation
