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Updated: May 27, 2025
08:04
Measuring Sensitivity to Viewpoint Change with and without Stereoscopic Cues
Published on: December 4, 2013
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Binaural rendering using higher-order stereophony.
Jacob Hollebon1, Filippo Maria Fazi1
1Institute of Sound and Vibration Research (ISVR), University of Southampton, Southampton SO17 1BJ, United Kingdom.
The Journal of the Acoustical Society of America
|February 18, 2025
Summary
Higher-order stereophony offers efficient spatial audio reproduction by focusing on specific soundfield coefficients. This method performs comparably to higher-order ambisonics but requires fewer coefficients for accurate binaural signal reproduction.
Area of Science:
- Spatial audio reproduction
- Acoustics
- Signal processing
Background:
- Classic stereophony is limited to two channels.
- Higher-order stereophony extends spatial audio to higher orders and multi-channel arrays.
- Accurate soundfield reproduction over a line is achieved by reproducing specific spherical harmonic coefficients.
Purpose of the Study:
- To extend higher-order stereophony to binaural reproduction.
- To compare higher-order stereophony with higher-order ambisonics.
- To evaluate the efficiency and performance of higher-order stereophony.
Main Methods:
- Extension of higher-order stereophony to binaural reproduction.
- Reproduction of degree m=0 spherical harmonic soundfield coefficients.
- Comparison with higher-order ambisonics using simulations and listening tests.
Main Results:
- Exact binaural signal reproduction with a rigid sphere head-related transfer function model.
- Reordering of generalized head-related transfer functions into low-degree spherical harmonic coefficients.
- Similar performance to higher-order ambisonics with fewer required coefficients.
Conclusions:
- Higher-order stereophony provides an efficient alternative for spatial audio reproduction.
- The technique is effective for binaural reproduction, especially with simplified head-related transfer function models.
- Performance limitations exist for higher virtual source elevations compared to higher-order ambisonics.
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