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Deep Learning for Synthesis of Head-Related Transfer Functions

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Ipsilateral and contralateral head-related transfer functions (HRTF) are used for creating the perception of a virtual sound source at a virtual location. Publicly available databases use a subset of a full-grid of angular directions due to time and complexity to acquire and deconvolve responses. In this paper we compare and contrast subspace-based techniques for reconstructing HRTFs at arbitrary directions for a sparse dataset (e.g., IRCAM-Listen HRTF database) using (i) hybrid-based (combined linear and nonlinear) principal component analysis (PCA)+fully-connected neural network (FCNN), and (ii) a fully nonlinear (viz., deep learning based) Autoencoder (AE) approach. The results from the AE-based approach show improvement over the hybrid approach, in both objective and subjective tests, and we validate the AE-based approach on the MIT dataset.

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AES - Audio Engineering Society