Spatial Audio Signal Enhancement: A Multi-output MVDR Method in The Spherical Harmonic-domain
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arXiv
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| Hauptverfasser: | , , , |
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| Format: | Preprint |
| Veröffentlicht: |
2024
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| _version_ | 1866918133129805824 |
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| author | Zhang, Huawei Zhang, Jihui Sun, Huiyuan Samarasinghe, Prasanga |
| author_facet | Zhang, Huawei Zhang, Jihui Sun, Huiyuan Samarasinghe, Prasanga |
| contents | Spatial audio signal enhancement aims to reduce interfering source contributions while preserving the desired sound field with its spatial cues. Existing methods generally rely on impractical assumptions (e.g. 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 recordings 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_03269 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Spatial Audio Signal Enhancement: A Multi-output MVDR Method in The Spherical Harmonic-domain Zhang, Huawei Zhang, Jihui Sun, Huiyuan Samarasinghe, Prasanga Audio and Speech Processing Spatial audio signal enhancement aims to reduce interfering source contributions while preserving the desired sound field with its spatial cues. Existing methods generally rely on impractical assumptions (e.g. 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 recordings 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. |
| title | Spatial Audio Signal Enhancement: A Multi-output MVDR Method in The Spherical Harmonic-domain |
| topic | Audio and Speech Processing |
| url | https://arxiv.org/abs/2409.03269 |