Efficient HRTF Interpolation in 3D Moving Sound

This paper addresses efficient interpolation of Head-Related Transfer Functions (HRTFs) for binaural generation of moving sound. Aiming at computational complexity reduction, the authors have recently proposed a new method for HRTF interpolation based on auxiliary Inter-positional Transfer Functions (IPTFs). The present paper reviews this IPTF-based method and focuses on IPTF design, which employs tools such as balanced model reduction and spectral smoothing to compute a complete set of reduced-order IPTFs. The interpolation scheme based on these reduced-order IPTFs is computationally more efficient and yields results perceptually comparable to those attainable by the bilinear method, which uses the HRTFs directly. Therefore, the proposed method is promising for real-time generation of spatial sound.

[1]  I. Kale,et al.  Low-order modeling of head-related transfer functions using balanced model truncation , 1997, IEEE Signal Processing Letters.

[2]  Ville Pulkki,et al.  Virtual Sound Source Positioning Using Vector Base Amplitude Panning , 1997 .

[3]  Jyri Huopaniemi,et al.  Efficient HRTF synthesis using an interaural transfer function model , 2000, 2000 10th European Signal Processing Conference.

[4]  J Chen,et al.  External ear transfer function modeling: a beamforming approach. , 1992, The Journal of the Acoustical Society of America.

[5]  H. Colburn,et al.  On the minimum-phase approximation of head-related transfer functions , 1995, Proceedings of 1995 Workshop on Applications of Signal Processing to Audio and Accoustics.

[6]  Tapio Lokki,et al.  Creating Interactive Virtual Acoustic Environments , 1999 .

[7]  John Mourjopoulos,et al.  Addendum to 'Generalized Fractional-Octave Smoothing of Audio and Acoustic Responses' , 2000 .

[8]  Luiz W. P. Biscainho,et al.  Using inter-positional Transfer Functions in 3D-sound , 2002, 2002 IEEE International Conference on Acoustics, Speech, and Signal Processing.

[9]  Matti Karjalainen,et al.  Objective and Subjective Evaluation of Head-Related Transfer Function Filter Design , 1999 .

[10]  Jean-Marc Jot,et al.  Study and Comparison of Efficient Methods for 3-D Audio Spatialization Based on Linear Decomposition of HRTF Data , 2000 .

[11]  Gregory H. Wakefield,et al.  Introduction to Head-Related Transfer Functions (HRTFs): Representations of HRTFs in Time, Frequency, and Space , 2001 .

[12]  Durand R. Begault,et al.  3-D Sound for Virtual Reality and Multimedia Cambridge , 1994 .

[13]  Jean-Marc Jot,et al.  Digital Signal Processing Issues in the Context of Binaural and Transaural Stereophony , 1995 .

[14]  Vesa Välimäki,et al.  Suppression of transients in time-varying recursive filters for audio signals , 1998, Proceedings of the 1998 IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP '98 (Cat. No.98CH36181).

[15]  R. Duda,et al.  Modeling the Contralateral HRTF , 1999 .

[16]  G.D. Cain,et al.  Approximation of FIR by IIR digital filters: an algorithm based on balanced model reduction , 1992, IEEE Trans. Signal Process..

[17]  Bill Gardner,et al.  HRTF Measurements of a KEMAR Dummy-Head Microphone , 1994 .