title: A local representation of the head-related transfer function.
abstract: Spatial descriptions of the head-related transfer function (HRTF) using spherical harmonics, which is commonly used for the purpose, consider all directions simultaneously. However, in perceptual studies, it is necessary to model HRTFs with different angular resolutions at different directions. To this end, an alternative spatial representation of the HRTF, based on local analysis functions, is introduced. The proposal is shown to have the potential to describe the local features of the HRTF. This is verified by comparing the reconstruction error achieved by the proposal to that of the spherical harmonic decomposition when reconstructing the HRTF inside a spherical cap.
authors.affiliation: Research Institute of Electrical Communication and Graduate School of Information Sciences, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-0813, Japan shichao@ais.riec.tohoku.ac.jp, jorge@ais.riec.tohoku.ac.jp, salvador@ais.riec.tohoku.ac.jp, saka@ais.riec.tohoku.ac.jp.
authors.forename: Shichao
authors.initials: S
authors.lastname: Hu
authors.affiliation: Research Institute of Electrical Communication and Graduate School of Information Sciences, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-0813, Japan shichao@ais.riec.tohoku.ac.jp, jorge@ais.riec.tohoku.ac.jp, salvador@ais.riec.tohoku.ac.jp, saka@ais.riec.tohoku.ac.jp.
authors.forename: Jorge
authors.initials: J
authors.lastname: Trevino
authors.affiliation: Research Institute of Electrical Communication and Graduate School of Information Sciences, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-0813, Japan shichao@ais.riec.tohoku.ac.jp, jorge@ais.riec.tohoku.ac.jp, salvador@ais.riec.tohoku.ac.jp, saka@ais.riec.tohoku.ac.jp.
authors.forename: Cesar
authors.initials: C
authors.lastname: Salvador
authors.affiliation: Research Institute of Electrical Communication and Graduate School of Information Sciences, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-0813, Japan shichao@ais.riec.tohoku.ac.jp, jorge@ais.riec.tohoku.ac.jp, salvador@ais.riec.tohoku.ac.jp, saka@ais.riec.tohoku.ac.jp.
authors.forename: Shuichi
authors.initials: S
authors.lastname: Sakamoto
authors.affiliation: Institute of Acoustics, Chinese Academy of Sciences, Beijing, 100190, China junfeng.li.1979@gmail.com.
authors.forename: Junfeng
authors.initials: J
authors.lastname: Li
authors.affiliation: Research Institute of Electrical Communication and Graduate School of Information Sciences, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-0813, Japan yoh@riec.tohoku.ac.jp.
authors.forename: Yôiti
authors.initials: Y
authors.lastname: Suzuki