TY - CONF
T1 - Plane-wave decomposition with aliasing cancellation for binaural sound reproduction
AU - Alon, David L.
AU - Sheaffer, Jonathan
AU - Rafaely, Boaz
N1 - Funding Information:
ACKNOWLEDGMENTS The authors would like to acknowledge the support for this research: (1) This work was supported by the Israel Science Foundation (ISF) under Grant 146/13, (2) The research leading to these results has received funding from the European Union's Seventh Framework Programme (FP7/2007-2013) under grant agreement no. 609465 as part of the Embodied Audition for RobotS (EARS) project, and (3) The research was partially supported by the Helmsley Charitable Trust through the Agricultural, Biological and Cognitive Robotics Center of Ben-Gurion University of the Negev.
PY - 2015/1/1
Y1 - 2015/1/1
N2 - Spherical microphone arrays are used for capturing three-dimensional sound fields, from which binaural signals can be obtained. Plane-wave decomposition of the sound field is typically employed in the first stage of the processing. However, with practical arrays the upper operating frequency is limited by spatial aliasing. In this paper, a measure of plane-wave decomposition error is formulated to highlight the problem of spatial aliasing. A novel method for plane-wave decomposition at frequencies that are typically considered above the maximal operating frequency is then presented, based on the minimization of aliasing error. The mathematical analysis is complemented by a simulation study and by a preliminary listening experiment. Results show a clear perceptual improvement when aliasing-cancellation is applied to aliased binaural signals, indicating that the proposed method can be used to extend the bandwidth of binaural signals rendered from microphone array recordings.
AB - Spherical microphone arrays are used for capturing three-dimensional sound fields, from which binaural signals can be obtained. Plane-wave decomposition of the sound field is typically employed in the first stage of the processing. However, with practical arrays the upper operating frequency is limited by spatial aliasing. In this paper, a measure of plane-wave decomposition error is formulated to highlight the problem of spatial aliasing. A novel method for plane-wave decomposition at frequencies that are typically considered above the maximal operating frequency is then presented, based on the minimization of aliasing error. The mathematical analysis is complemented by a simulation study and by a preliminary listening experiment. Results show a clear perceptual improvement when aliasing-cancellation is applied to aliased binaural signals, indicating that the proposed method can be used to extend the bandwidth of binaural signals rendered from microphone array recordings.
UR - http://www.scopus.com/inward/record.url?scp=84983158153&partnerID=8YFLogxK
M3 - Paper
T2 - 139th Audio Engineering Society International Convention, AES 2015
Y2 - 29 October 2015 through 1 November 2015
ER -