A practical method for HRTF phase pre-processing

• Pre-processing of HRTF phase has proved useful to improve binaural rendering of order-limited spherical harmonics (SH) signals. The adjustment is typically applied at high frequencies and allows to reduce magnitude errors for directional sound field components. This article proposes a practical method for HRTF phase pre-processing using linear phase above a cutoff frequency, and a direction-dependent phase offset to maintain correct diffuse-field interaural coherence. Two applications are discussed - filter design for binaural rendering of microphone array or SH-signals, and reduced coloration in virtual source panning on virtual speaker setups. Factors influencing the perceptual transparency of the phase modification are evaluated subjectively and objectively.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Annan teknik -- Mediateknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Other Engineering and Technologies -- Media Engineering (hsv//eng)

Nyckelord

Auralization

Ambisonics decoding

HRTF interpolation

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