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Conference Paper

Speech Intelligibility in Teleconference Application of Directional Audio Coding

Authors: Ahonen, Jukka; Pulkki, Ville

AES Conference: 40th International Conference: Spatial Audio: Sense the Sound of Space · Paper 4-3 · October 2010

Abstract

Directional Audio Coding (DirAC), which is a method to parametrize the directional sound field, can be applied to a low bit-rate teleconferencing. The direction and diffuseness of the sound field are analyzed from microphone signals within frequency-bands in one end, transmitted to the other end as a metadata in a single channel with an audio signal, and used to reproduce spatial sound. In this paper, one- and two-dimensional arrays of omnidirectional microphones to provide input signals for DirAC teleconferencing are reviewed. A listening test to measure speech intelligibility in DirAC teleconferencing was conducted, when both one- and two-dimensional microphone arrays were utilized. The results for the test are presented in this paper.

Details

Published in
AES Conference: 40th International Conference: Spatial Audio: Sense the Sound of Space
Paper number
4-3
Publication date
October 6, 2010
Session subject
Perception and Evaluation of Spatial Audio
Affiliation
Aalto University School of Science and Technology, Aalto, Finland (See document for exact affiliation information.)
Type
Conference Paper