Interpolation of Combined Head and Room Impulse Response for Audio Spatialization

Sanjeev Mehrotra, Wei-ge Chen, and Zhengyou Zhang

Abstract

Audio spatialization is becoming an important part

of creating realistic experiences needed for immersive video conferencing

and gaming. Using a combined head and room impulse

response (CHRIR) has been recently proposed as an alternative

to using separate head related transfer functions (HRTF) and

room impulse responses (RIR). Accurate measurements of the

CHRIR at various source and listener locations and orientations

are needed to perform good quality audio spatialization. However,

it is infeasible to accurately measure or model the CHRIR for

all possible locations and orientations. Therefore, low-complexity

and accurate interpolation techniques are needed to perform

audio spatialization in real-time. In this paper, we present

a frequency domain interpolation technique which naturally

interpolates the interaural level difference (ILD) and interaural

time difference (ITD) for each frequency component in the

spectrum. The proposed technique allows for an accurate and

low-complexity interpolation of the CHRIR as well as allowing

for a low-complexity audio spatialization technique which can be

used for both headphones as well as loudspeakers.

Details

Publication typeProceedings
Published inProceedings of MMSP
PublisherIEEE
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