A master thesis from Aalborg University
Own-Voice Retrieval for Hearing Assistive Devices: A Combined DNN-Beamforming Approach
Author(s)
Term
4. semester
Education
Publication year
2019
Submitted on
2019-06-07
Abstract
In this thesis, we propose a speech enhancement system for own-voice retrieval the presence of additive background. The system is designed with embedded devices in mind, specifically hearing assistive devices. The work focuses on discriminating noise-dominated time-frequency units from own-voice-dominated units, for which we employ a convolutional neural network to perform classification. Using only the classified time-frequency units, we show that a MVDR and a MWF beamformer can be constructed. Our results show that considerable improvements can be made in terms of perceived quality and intelligibility using the MVDR beamformer for selected noise types, whereas speech-shaped noise and babble-noise remains a challenge.
Documents
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