Model-matching Principle Applied to the Design of an Array-based All-neural Binaural Rendering System for Audio Telepresence

Telepresence aims to create an immersive but virtual experience of the far-end audio and visual scene for users at the near-end. In this contribution, we propose an array-based binaural rendering system that converts the array microphone signals into the head-related transfer function (HRTF)-filtered output signals for headphone-rendering. The proposed approach is formulated on the basis of a model-matching principle (MMP) and is capable of delivering more natural immersiveness than the conventional localization-beamforming-HRTF filtering (LBH) approach. The MMP-based rendering system can be realized via multichannel inverse filtering (MIF) and multichannel deep filtering (MDF). In this study, we adopted the MDF approach and used the LBH as well as MIF as the baselines. The all-neural system jointly captures the spatial information (spatial rendering), preserves ambient sound (enhancement), and reduces noise (enhancement), prior to generating binaural outputs. Objective and subjective tests are employed to compare the proposed telepresence system with two baselines.