Measuring the acoustic echo cancellation capability of varying loudspeaker-microphone configurations
* Presenting author
Abstract:
Acoustic Echo Cancellation (AEC) plays a crucial role in speech communication devices to ensure full-duplex telephony performance. While AEC algorithms have been studied extensively in the literature, device-specific details like microphone or loudspeaker configurations are often neglected, despite their contribution to the AEC performance of the whole system.In this work, we propose a method to compare different loudspeaker-microphone configurations concerning their contribution to the overall AEC performance. We consider a generic AEC system consisting of an adaptive filter and an omniscient Wiener post-filter to allow a fair comparison between different setups. Besides the echo return loss (ERL) and the echo return loss enhancement (ERLE), we use the nearend-to-residual-echo ratio (NRER) as a quality indicator for full-duplex AEC performance, since it directly relates to the influence of the post-filter on the near-end speech signal. Experimental results regarding the AEC potential of different loudspeaker-microphone setups and beamformer configurations are discussed.