In this paper we consider the problem of B-format encoding of live audio scenes captured using practical compact microphone arrays with unconstrained microphone locations. We formulate the problem and provide a mathematical framework for a hybrid adaptive beamformer which combines active beamforming based on frequency-domain spatial analysis and synthesis for estimated directional audio sources and least-squares passive beamforming for residual audio scene components. The necessary calibration measurements are described and algorithmic details for ef?cient implementation are given.

Author: Goodwin, Michael M.
Affiliation: DTS-Xperi, Inc.
AES Conference: 2018 AES International Conference on Audio for Virtual and Augmented Reality (August 2018)
Paper Number: P5-2
Publication Date: August 11, 2018

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