A Method for Estimating Interaural Time Difference for Binaural Synthesis
| Title | A Method for Estimating Interaural Time Difference for Binaural Synthesis |
| Publication Type | Conference Paper |
| Year of Publication | 2008 |
| Authors | Nam, J., J. S. Abel, and J. O. Smith III |
| Conference Name | the 125th Audio Engineering Society Convention |
| Date Published | 10/2008 |
| Publisher | AES |
| Conference Location | San Francisco, CA, USA |
| Keywords | acoustic 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. |
| URL | http://www.aes.org/e-lib/browse.cfm?elib=14763 |
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