arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2307.04460eess.AScs.SDeess.SP
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利用外部麦克风进行双耳RTF向量基的多说话人方向估计

Exploiting an External Microphone for Binaural RTF-Vector-Based Direction of Arrival Estimation for Multiple Speakers

Daniel Fejgin, Simon Doclo

AI总结:

本文提出一种利用外部麦克风降低计算复杂度的双耳RTF向量基多说话人方向估计方法,通过空间相干性假设提升性能。

摘要:

在助听器应用中,一个重要目标是准确估计嘈杂和回声环境中的多个说话人的方向到达(DOA)。最近,我们提出了一种双耳DOA估计方法,其中通过选择Hermitian角度谱在估计的相对传输函数(RTF)向量和原型消音RTF向量数据库之间最大化的方向来估计说话人的DOA。RTF向量通过协方差白化(CW)方法进行估计,该方法需要计算复杂的一般特征值分解。空间谱仅考虑那些可能一个说话人主导其他说话人、噪声和回声的频率。在本贡献中,我们利用可用的外部麦克风,该麦克风在空间上与助听器麦克风分离,并考虑了一种低复杂度的RTF向量估计方法,该方法假设外部麦克风中的不利成分与助听器麦克风之间的空间相干性较低。使用两个说话人和类似弥散的babble噪声在具有轻微回声和低信噪比的声学环境中的录音,仿真结果表明,所提出的方法在计算复杂度较低的情况下,DOA估计性能与CW方法相当。

英文摘要:

In hearing aid applications, an important objective is to accurately estimate the direction of arrival (DOA) of multiple speakers in noisy and reverberant environments. Recently, we proposed a binaural DOA estimation method, where the DOAs of the speakers are estimated by selecting the directions for which the so-called Hermitian angle spectrum between the estimated relative transfer function (RTF) vector and a database of prototype anechoic RTF vectors is maximized. The RTF vector is estimated using the covariance whitening (CW) method, which requires a computationally complex generalized eigenvalue decomposition. The spatial spectrum is obtained by only considering frequencies where it is likely that one speaker dominates over the other speakers, noise and reverberation. In this contribution, we exploit the availability of an external microphone that is spatially separated from the hearing aid microphones and consider a low-complexity RTF vector estimation method that assumes a low spatial coherence between the undesired components in the external microphone and the hearing aid microphones. Using recordings of two speakers and diffuse-like babble noise in acoustic environments with mild reverberation and low signal-to-noise ratio, simulation results show that the proposed method yields a comparable DOA estimation performance as the CW method at a lower computational complexity.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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