提出一种球谐域多输出MVDR方法，提升混响环境下的语音空间保真度。
Spatial Audio Signal Enhancement: A Multi-output MVDR Method in The Spherical Harmonic-domain
- 用相对球谐系数提取纯净球谐系数，实现空间音频增强
- 在混响环境下估计误差更低，语音保真度更高，噪声抑制相当
- 适合需要保留声场空间信息的语音增强场景
空间音频增强旨在降低干扰声源影响的同时保留期望声场及其空间线索。现有方法通常依赖不切实际的假设（如精确估计不现实的信息），或适用范围有限。本文提出一种基于球谐（SH）域最小方差无失真响应（MVDR）的空间信号增强方法，利用相对球谐系数（ReHCs）从混响环境中的噪声录音中提取干净的球谐系数。仿真研究表明，与作为基线的波束成形-投影方法相比，该方法在混响环境中实现了更低的估计误差、更高的语音失真比（SDR），且噪声抑制（NR）性能相当，特别是在甜区范围内。
原文摘要 · Abstract (English)
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.
Thank you to arXiv for use of its open access interoperability. PaperDance 不是 arXiv 官方产品；中文卡片由大模型生成，请以原文为准。