Optimizations of the Spatial Decomposition Method for Binaural Reproduction

Garí, Sebastià V. Amengual; Arend, Johannes M.; Calamia, Paul; Robinson, Philip W.

doi:10.17743/jaes.2020.0063

Cited by 23 publications

(8 citation statements)

References 25 publications

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“…The direct sound and selected reflections are then assigned the DOAs listed according to the TOAs in the passed DOA vector. In the best case the DOA vector is post-processed, i.e., smoothed and with stabilized direct sound [26], to improve the perceptual quality of binaural renderings.…”

Section: Precomputed Doasmentioning

confidence: 99%

“…Next the (processed) RIR chunks are convolved with HRTFs according to the DOAs for the respective head orientation, resulting in a specific directional pattern for each point of the spatial sampling grid. To calculate the DOAs first estimated for frontal head orientation at the measurement or extrapolated position, a rotation matrix according to the head orientation is applied (see, e.g., [26]). As with the directivity measurements, the HRTF set is stored as SH coefficients at N ≥ 35, allowing HRTFs to be obtained for any direction.…”

Section: Directional Componentsmentioning

confidence: 99%

See 1 more Smart Citation

Six-Degrees-of-Freedom Parametric Spatial Audio Based on One Monaural Room Impulse Response

Arend¹,

Garí²,

Schissler³

et al. 2021

J. Audio Eng. Soc.

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Section: Precomputed Doasmentioning

confidence: 99%

Section: Directional Componentsmentioning

confidence: 99%

Six-Degrees-of-Freedom Parametric Spatial Audio Based on One Monaural Room Impulse Response

Arend¹,

Garí²,

Schissler³

et al. 2021

J. Audio Eng. Soc.

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“…For example, Neidhardt et al [22,23] evaluated the plausibility of position-dynamic virtual acoustic realities in which listeners move towards a virtual sound source using either a continuous or ordinal plausibility rating scale. Amengual Garí et al [24] evaluated the plausibility of 3-DoF parametric binaural rendering using a two-alternative forced-choice (2AFC) procedure. Either both stimuli were virtual, or one of them was a real loudspeaker, and participants had to rate which of the two stimuli they perceived as more plausible.…”

Section: Introductionmentioning

confidence: 99%

Do near-field cues enhance the plausibility of non-individual binaural rendering in a dynamic multimodal virtual acoustic scene?

et al. 2021

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It is commonly believed that near-field head-related transfer functions (HRTFs) provide perceptual benefits over far-field HRTFs that enhance the plausibility of binaural rendering of nearby sound sources. However, to the best of our knowledge, no study has systematically investigated whether using near-field HRTFs actually provides a perceptually more plausible virtual acoustic environment. To assess this question, we conducted two experiments in a six-degrees-of-freedom multimodal augmented reality experience where participants had to compare non-individual anechoic binaural renderings based on either synthesized near-field HRTFs or intensity-scaled far-field HRTFs and judge which of the two rendering methods led to a more plausible representation. Participants controlled the virtual sound source position by moving a small handheld loudspeaker along a prescribed trajectory laterally and frontally near the head, which provided visual and proprioceptive cues in addition to the auditory cues. The results of both experiments show no evidence that near-field cues enhance the plausibility of non-individual binaural rendering of nearby anechoic sound sources in a dynamic multimodal virtual acoustic scene as examined in this study. These findings suggest that, at least in terms of plausibility, the additional effort of including near-field cues in binaural rendering may not always be worthwhile for virtual or augmented reality applications.

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“…The first challenge can be overcome by employing an array that captures room impulse responses (RIRs) with multiple microphones to characterize the directional properties of the acoustic environment. Using array processing techniques, the array RIRs are transformed into BRIRs for any given head rotation by combining them with an anechoically measured set of generic HRIRs [4], [5]. Perceptually plausible rendering from array RIRs, i.e., convincing rendering when no explicit external reference is provided, has been achieved with such a method [4].…”

Section: Introductionmentioning

confidence: 99%

“…Using array processing techniques, the array RIRs are transformed into BRIRs for any given head rotation by combining them with an anechoically measured set of generic HRIRs [4], [5]. Perceptually plausible rendering from array RIRs, i.e., convincing rendering when no explicit external reference is provided, has been achieved with such a method [4].…”

Section: Introductionmentioning

confidence: 99%

Spatial Subtraction of Reflections from Room Impulse Responses Measured with a Spherical Microphone Array

Deppisch¹,

Ahrens

Garí

et al. 2021

2021 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics (WASPAA)

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We propose a method for the decomposition of measured directional room impulse responses (DRIRs) into prominent reflections and a residual. The method comprises obtaining a fingerprint of the timefrequency signal that a given reflection carries, imposing this timefrequency fingerprint on a plane-wave prototype that exhibits the same propagation direction as the reflection, and finally subtracting this plane-wave prototype from the DRIR. Our main contributions are the formulation of the problem as a spatial subtraction as well as the incorporation of order truncation, spatial aliasing and regularization of the radial filters into the definition of the underlying beamforming problem. We demonstrate, based on simulated as well as measured array impulse responses, that our method increases the accuracy of the model of the reflection under test and consequently decreases the energy of the residual that remains in a measured DRIR after the spatial subtraction.

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Optimizations of the Spatial Decomposition Method for Binaural Reproduction

Cited by 23 publications

References 25 publications

Six-Degrees-of-Freedom Parametric Spatial Audio Based on One Monaural Room Impulse Response

Six-Degrees-of-Freedom Parametric Spatial Audio Based on One Monaural Room Impulse Response

Do near-field cues enhance the plausibility of non-individual binaural rendering in a dynamic multimodal virtual acoustic scene?

Spatial Subtraction of Reflections from Room Impulse Responses Measured with a Spherical Microphone Array

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