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A Method for Estimating Interaural Time Difference for Binaural Synthesis

Submitted by juhan on Wed, 05/12/2010 - 2:30pm
TitleA Method for Estimating Interaural Time Difference for Binaural Synthesis
Publication TypeConference Paper
Year of Publication2008
AuthorsNam, J., J. S. Abel, and J. O. Smith III
Conference Namethe 125th Audio Engineering Society Convention
Date Published10/2008
PublisherAES
Conference LocationSan Francisco, CA, USA
Keywordsacoustic signal processing, HRTF, ITD
Abstract A method for estimating interaural time difference (ITD) from measured head-related transfer functions (HRTFs) is presented. The method forms ITD as the difference in left-ear and right-ear arrival times, estimated as the times of maximum cross-correlation between measured HRTFs and their minimum-phase counterparts. This arrival time estimate is related to a nonlinear least-squares fit to the measured excess phase, emphasizing those frequencies having large HRTF magnitude and deweighting large phase delay errors. As HRTFs are nearly minimum-phase, this method is robust compared to the conventional approach of cross-correlating left-ear and right-ear HRTFs, which can be very different. The method also performs slightly better than techniques averaging phase delay over a limited frequency range.
URLhttp://www.aes.org/e-lib/browse.cfm?elib=14763
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