On the Minimum-Phase Nature of Head-Related Transfer Functions

Nam J, Kolar MA, Abel JS. On the Minimum-Phase Nature of Head-Related Transfer Functions. In: AES Convention 125. Audio Engineering Society; 2008. Paper 7546. Available from: https://aes.org/publications/elibrary-page/?id=14698

@inproceedings{Nam2008_14698,
  author = {Nam, Juhan and Kolar, Miriam A. and Abel, Jonathan S.},
  title = {{On the Minimum-Phase Nature of Head-Related Transfer Functions}},
  booktitle = {AES Convention 125},
  note = {Paper 7546},
  year = {2008},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=14698}
}

TY  - CPAPER
TI  - On the Minimum-Phase Nature of Head-Related Transfer Functions
AU  - Nam, Juhan
AU  - Kolar, Miriam A.
AU  - Abel, Jonathan S.
T2  - AES Convention 125
M1  - Paper 7546
PY  - 2008
DA  - 2008/10/06
UR  - https://aes.org/publications/elibrary-page/?id=14698
PB  - Audio Engineering Society
LA  - en
AB  - For binaural synthesis, head-related transfer functions (HRTFs) are commonly implemented as pure delays followed by minimum-phase systems. Here, the minimum-phase nature of HRTFs is studied. The cross-coherence between minimum-phase and unprocessed measured HRTFs was seen to be greater than 0.9 for a vast majority of the HRTFs, and was rarely below 0.8. Non-minimum-phase filter components resulting in reduced cross-coherence appeared in frontal and ipsilateral directions. The excess group delay indicates that these non-minimum-phase components are associated with regions of moderate HRTF energy. Other regions of excess phase correspond to high-frequency spectral nulls, and have little effect on cross-coherence.
ER  -