TY - CONF T1 - Efficient Conversion of X.Y Surround Sound Content to Binaural Head-Tracked Form for HRTF-Enabled Playback T2 - IEEE International Conference on Acoustics, Speech and Signal Processing, 2007. ICASSP 2007 Y1 - 2007 A1 - Zotkin,Dmitry N A1 - Duraiswami, Ramani A1 - Gumerov, Nail A. KW - Acoustic fields KW - Acoustic scattering KW - acoustic signal processing KW - audio acoustics KW - Audio systems KW - binaural head-tracked KW - binaural presentation KW - Computational efficiency KW - Costs KW - Ear KW - head-related transfer function KW - Headphones KW - HRTF-enabled playback KW - Loudspeakers KW - Music KW - reverberation KW - sound field KW - spatio-temporal representation KW - surround sound KW - surround sound content KW - Transfer functions KW - virtual audio principles AB - Binaural presentation of X.Y sound is usually performed using virtual audio principles - that is, by attempting to virtually reproduce the setup of the X+Y loudspeakers in the reference room configuration. The computational cost of such playback is linear in the number of channels in the X.Y setup. We present a novel scheme that computes, offline, a spatio-temporal representation of the sound field in the listening area and store it as a multipole expansion. During head-tracked playback, the binaural signal is obtained by evaluating the multipole expansion at the ear position corresponding to the current user pose, resulting in a fixed playback cost. The representation is further extended to incorporate individualized HRTFs at no additional cost. Simulation results are presented. JA - IEEE International Conference on Acoustics, Speech and Signal Processing, 2007. ICASSP 2007 PB - IEEE VL - 1 SN - 1-4244-0727-3 M3 - 10.1109/ICASSP.2007.366606 ER -