Linux Audio Conference 2013
Multi-Channel Noise/Echo Reduction in PulseAudio on Embedded Linux
Karl Freiberger, Stefan Huber, Peter Meerwald
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Ambient noise and acoustic echo reduction are indispensable signal processing steps in a hands-free audio communication system. Taking the signals from multiple microphones into account can help to more effectively reduce disturbing noise and echo. This paper outlines the design and implementation of a multi-channel noise reduction and echo cancellation module integrated in the PulseAudio sound system. We discuss requirements, trade-offs and results obtained from an embedded Linux platform.

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