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arXiv 2102.09853eess.AS
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基于高阶高保真度立体声信号的卷积递归神经网络带噪语音波达方向估计

Direction of Arrival Estimation of Noisy Speech Using Convolutional Recurrent Neural Networks with Higher-Order Ambisonics Signals

Nils Poschadel, Robert Hupke, Stephan Preihs, Jürgen Peissig

摘要:

在估计语音/声音信号的到达波达方向时,在一阶高保真度立体声响复制信号上训练卷积递归神经网络是众所周知的方法。在这项工作中,我们研究了将高保真度立体声复制的阶数增加到四阶是否会进一步提高卷积递归神经网络的估计性能。虽然我们对基于模拟空间房间脉冲响应的数据的结果表明,使用更高的高保真度立体声响复制阶数确实有可能提供更好的定位结果,但对基于从二阶开始的真实空间房间脉冲响应的数据没有进一步的改进。相反,从原始数据中提取有意义的特征似乎至关重要。从声强矢量得到的一阶特征在几乎所有情况下都优于纯高阶幅度和相位特征。

英文摘要:

Training convolutional recurrent neural networks on first-order Ambisonics signals is a well-known approach when estimating the direction of arrival for speech/sound signals. In this work, we investigate whether increasing the order of Ambisonics up to the fourth order further improves the estimation performance of convolutional recurrent neural networks. While our results on data based on simulated spatial room impulse responses show that the use of higher Ambisonics orders does have the potential to provide better localization results, no further improvement was shown on data based on real spatial room impulse responses from order two onwards. Rather, it seems to be crucial to extract meaningful features from the raw data. First order features derived from the acoustic intensity vector were superior to pure higher-order magnitude and phase features in almost all scenarios.

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