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Distant Speech Beamforming Improving Multi-User ASR

In this paper an algorithm that improves side speaker attenuation for super directive beamformer like MVDR (Minimum Variance Distortionless Response) is presented. This technique can be utilized in a scenario where there are multiple people in a room intending to interact with an ASR- (automatic speech recognition) enabled device, e.g., smart speaker. The experiments show that the proposed solution gives a reduction of WER (word error rate) up to 23.93% calculated for command uttered by one user when a second user was treated as the side speaker.

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