Sound Field Translation Methods for Binaural Reproduction

Birnie, Lachlan; Abhayapala, Thushara D.; Samarasinghe, Prasanga N.; Tourbabin, Vladimir

doi:10.1109/waspaa.2019.8937274

Cited by 14 publications

(16 citation statements)

References 17 publications

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“…Another possibility is to estimate the Bilateral Ambisonics signals from standard recordings at the center of the head, e.g. by sound-field translation [59][60][61][62]. The incorporation of the sound-field estimation and head-tracking processing algorithms in Bilateral Ambisonics reproduction is suggested for future work.…”

Section: B Application Of the Proposed Methodsmentioning

confidence: 99%

Binaural Reproduction Based on Bilateral Ambisonics and Ear-Aligned HRTFs

Ben-Hur

Alon

Mehra

et al. 2021

IEEE/ACM Trans. Audio Speech Lang. Process.

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Reproduction of high quality spatial sound has gained considerable importance with the recent technology developments in the fields of virtual and augmented reality. Recently, the reproduction of binaural signals in the Spherical-Harmonics (SH) domain has been proposed. This is performed by using SH representations of the sound-field and the Head-Related Transfer Function (HRTF). These processes offer the flexibility to control the reproduced binaural signals, by manipulating the sound-field or the HRTFs using algorithms that operate directly in the SH domain. However, in most practical cases, the binaural reproduction is order-limited, which introduces truncation error that has a detrimental effect on the perception of the reproduced signals, mainly due to the truncation of the HRTF. A recent study showed that pre-processing of the HRTF by ear-alignment reduces its effective SH order, which may be beneficial for alleviating the above effect. In this paper, a method to incorporate the pre-processed ear-aligned HRTF into the binaural reproduction process is presented. The method uses Ambisonics representation of the sound-field formulated at the two ears, and is denoted here as Bilateral Ambisonics. The proposed method leads to a significant reduction in errors due to the limited-order reproduction, which yields a substantial improvement in perceived binaural reproduction quality even with SH as low as first order.

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Section: B Application Of the Proposed Methodsmentioning

confidence: 99%

Binaural Reproduction Based on Bilateral Ambisonics and Ear-Aligned HRTFs

Ben-Hur

Alon

Mehra

et al. 2021

IEEE/ACM Trans. Audio Speech Lang. Process.

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show abstract

“…The binaural signals should be reproduced with adaptation to the listener's head movement. In the planewave-decomposition-based methods, the binaural signals are adapted to the listening position by the phase shift of plane wave weights 21,22 . When the expansion center is moved from the origin to r ′ , Eq.…”

Section: Adaptation To Rotation and Translation Of Listener's Headmentioning

confidence: 99%

“…A typical microphone array used in the soundfield recording is a spherical microphone array mounted on an acoustically rigid object 15 since the spherical harmonic analysis of a soundfield is effective for binaural rendering [21][22][23][24][25] . The number of microphones and array size limit the reproducible frequency range and size of the reproducing region.…”

Section: Introductionmentioning

confidence: 99%

Binaural rendering from microphone array signals of arbitrary geometry

Iijima¹,

Koyama²,

Saruwatari³

2021

Preprint

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“…Kentgens et al [9] apply alternative multi-directional decomposition, e.g., the subspace methods SORTE/MUSIC for extraction and shifted re-encoding of direct components, complemented by a noise and diffuseness subspace that preserves ambient sounds. Birnie et al [10] introduce a sound field translation method for 6DoF binaural rendering based on sparse plane-wave expansion for near and far sources arranged on two rings around the higher-order recording perspective. Altogether, the single-perspective extrapolation approaches require either parametric time-frequency processing or higher order microphone arrays to achieve *Corresponding author: matthias.blochberger@posteo.at directional definition, and their extrapolation range depends on how successful distance information is guessed or estimated.…”

Section: Introductionmentioning

confidence: 99%

Particle-filter tracking of sounds for frequency-independent 3D audio rendering from distributed B-format recordings

Blochberger

Zotter

2021

Acta Acust.

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Six-Degree-of-Freedom (6DoF) audio rendering interactively synthesizes spatial audio signals for a variable listener perspective based on surround recordings taken at multiple perspectives distributed across the listening area in the acoustic scene. Methods that rely on recording-implicit directional information and interpolate the listener perspective without the attempt of localizing and extracting sounds often yield high audio quality, but are limited in spatial definition. Methods that perform sound localization, extraction, and rendering typically operate in the time-frequency domain and risk introducing artifacts such as musical noise. We propose to take advantage of the rich spatial information recorded in the broadband time-domain signals of the multitude of distributed first-order (B-format) recording perspectives. Broadband time-variant signal extraction retrieving direct signals and leaving residuals to approximate diffuse and spacious sounds is less of a quality risk, and likewise is the broadband re-encoding to enhance spatial definition of both signal types. To detect and track direct sound objects in this process, we combine the directional data recorded at the single perspectives into a volumetric multi-perspective activity map for particle-filter tracking. Our technical and perceptual evaluation confirms that this kind of processing enhances the otherwise limited spatial definition of direct-sound objects of other broadband but signal-independent virtual loudspeaker object (VLO) or Vector-Based Intensity Panning (VBIP) interpolation approaches.

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Sound Field Translation Methods for Binaural Reproduction

Cited by 14 publications

References 17 publications

Binaural Reproduction Based on Bilateral Ambisonics and Ear-Aligned HRTFs

Binaural Reproduction Based on Bilateral Ambisonics and Ear-Aligned HRTFs

Binaural rendering from microphone array signals of arbitrary geometry

Particle-filter tracking of sounds for frequency-independent 3D audio rendering from distributed B-format recordings

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