Partially Adaptive Multichannel Joint Reduction of Ego-noise and Environmental Noise

• URL: http://arxiv.org/abs/2303.15042v1
• Date: Mon, 27 Mar 2023 09:40:14 GMT
• Title: Partially Adaptive Multichannel Joint Reduction of Ego-noise and Environmental Noise
• Abstract summary: Ego-noise is mainly caused by the internal motors and joints of a robot. We propose a multichannel partially adaptive scheme to jointly model ego-noise and environmental noise.
• Score: 25.51080528855037
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Human-robot interaction relies on a noise-robust audio processing module capable of estimating target speech from audio recordings impacted by environmental noise, as well as self-induced noise, so-called ego-noise. While external ambient noise sources vary from environment to environment, ego-noise is mainly caused by the internal motors and joints of a robot. Ego-noise and environmental noise reduction are often decoupled, i.e., ego-noise reduction is performed without considering environmental noise. Recently, a variational autoencoder (VAE)-based speech model has been combined with a fully adaptive non-negative matrix factorization (NMF) noise model to recover clean speech under different environmental noise disturbances. However, its enhancement performance is limited in adverse acoustic scenarios involving, e.g. ego-noise. In this paper, we propose a multichannel partially adaptive scheme to jointly model ego-noise and environmental noise utilizing the VAE-NMF framework, where we take advantage of spatially and spectrally structured characteristics of ego-noise by pre-training the ego-noise model, while retaining the ability to adapt to unknown environmental noise. Experimental results show that our proposed approach outperforms the methods based on a completely fixed scheme and a fully adaptive scheme when ego-noise and environmental noise are present simultaneously.

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