Kavli Affiliate: Huawei Zhang
| First 5 Authors: Huawei Zhang, Jihui, Zhang, Huiyuan, Sun
| Summary:
Spatial audio signal enhancement aims to reduce interfering source
contributions while preserving the desired sound field with its spatial cues
intact. Existing methods generally rely on impractical assumptions (e.g. no
reverberation or accurate estimations of impractical information) or have
limited applicability. This paper presents a spherical harmonic (SH)-domain
minimum variance distortionless response (MVDR)-based spatial signal enhancer
using Relative Harmonic Coefficients (ReHCs) to extract clean SH coefficients
from noisy ones in reverberant environments. A simulation study shows the
proposed method achieves lower estimation error, higher speech-distortion-ratio
(SDR), and comparable noise reduction (NR) within the sweet area in a
reverberant environment, compared to a beamforming-and-projection method as the
baseline.
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