TY - GEN
T1 - Equalization strategies for binaural room impulse response rendering using spherical arrays
AU - Sheaffer, Jonathan
AU - Rafaely, Boaz
N1 - Publisher Copyright:
© Copyright 2015 IEEE All rights reserved.
PY - 2014/1/1
Y1 - 2014/1/1
N2 - Reconstruction of binaural room impulse responses (BRIRs) from spherical microphone array measurements in a room and a given head-related transfer function set, is beneficial for binaural reproduction with listener individualization, and for applying head rotations without needing to make numerous measurements of the sound field. Such algorithms often entail the truncation of BRIRs at low spherical harmonic orders, producing reduced reconstruction accuracy at high frequencies and accordingly affecting the perceived timbre. With the aim of restoring high-frequency energy and spatial cues, recent studies have proposed the use of an efficient equalization filter based on a spherical head model, or by direct numerical integration in the space domain. This paper extends the equalization approach by introducing a filter that takes into account the full geometric features of the human head. The proposed filter, as well as previously suggested algorithms, are reviewed and then subjectively evaluated in both measured and simulated environments. A MUSHRA listening experiment is employed to investigate the perceptual effects of equalizing order-truncated BRIRs. Results indicate a clear improvement in timbre, and a positive impact on spatial localization in low order cases.
AB - Reconstruction of binaural room impulse responses (BRIRs) from spherical microphone array measurements in a room and a given head-related transfer function set, is beneficial for binaural reproduction with listener individualization, and for applying head rotations without needing to make numerous measurements of the sound field. Such algorithms often entail the truncation of BRIRs at low spherical harmonic orders, producing reduced reconstruction accuracy at high frequencies and accordingly affecting the perceived timbre. With the aim of restoring high-frequency energy and spatial cues, recent studies have proposed the use of an efficient equalization filter based on a spherical head model, or by direct numerical integration in the space domain. This paper extends the equalization approach by introducing a filter that takes into account the full geometric features of the human head. The proposed filter, as well as previously suggested algorithms, are reviewed and then subjectively evaluated in both measured and simulated environments. A MUSHRA listening experiment is employed to investigate the perceptual effects of equalizing order-truncated BRIRs. Results indicate a clear improvement in timbre, and a positive impact on spatial localization in low order cases.
UR - http://www.scopus.com/inward/record.url?scp=84941242871&partnerID=8YFLogxK
U2 - 10.1109/EEEI.2014.7005804
DO - 10.1109/EEEI.2014.7005804
M3 - Conference contribution
AN - SCOPUS:84941242871
T3 - 2014 IEEE 28th Convention of Electrical and Electronics Engineers in Israel, IEEEI 2014
BT - 2014 IEEE 28th Convention of Electrical and Electronics Engineers in Israel, IEEEI 2014
PB - Institute of Electrical and Electronics Engineers
T2 - 2014 28th IEEE Convention of Electrical and Electronics Engineers in Israel, IEEEI 2014
Y2 - 3 December 2014 through 5 December 2014
ER -