Directional Audio Coding (DirAC) is a spatial-sound processing technique, where the arrival direction and diffuseness of sound are analyzed in frequency-bands from microphone signals, transmitted with one or multiple audio channels, and utilized for various purposes in synthesis. Among other applications, DirAC has been used in low bit-rate teleconferencing to provide spatial separation of remote talkers corresponding to reality. Here, the use of different microphone configurations, consisting of omnidirectional or directional microphones, is discussed in DirAC teleconferencing. The audio quality with different microphone techniques for DirAC teleconferencing is evaluated by the subjective listening tests, and the results are presented in this paper.

Author: Ahonen, Jukka
Affiliation: Aalto University School of Science and Technology, Aalto, Finland
AES Conference: 40th International Conference: Spatial Audio: Sense the Sound of Space (October 2010)
Paper Number: P-5
Publication Date: October 8, 2010
Subject: Spatial Audio

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