This paper proposes a novel direct source and first-order reflections localization method by integrating the high order Ambisonics (HOA) algorithm and deep neural network. We use the covariance matrix of HOA signals in the time domain as the input feature of the network, which contains precise spatial information of the sound sources under reverberant scenarios. Besides, we use the deconvolution-based neural network (DCNN) for the spatial pseudo-spectrum (SPS) reconstruction, based on which the spatial relationship between elevation and azimuth can be depicted. Considering that the first-order reflections of the sound source also contain spatial directivity like the direct source, we treat both of them as the sources in the learning process. We have carried out a series of experiments based on simulated and measured data under different reverberant scenarios, which prove the effectiveness and accuracy of the proposed DCNN model.
https://www.aes.org/e-lib/browse.cfm?elib=21673
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