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E. Hoffbauer, and M. Frank, "Four-Directional Ambisonic Spatial Decomposition Method With Reduced Temporal Artifacts," J. Audio Eng. Soc., vol. 70, no. 12, pp. 1002-1014, (2022 December.). doi: https://doi.org/10.17743/jaes.2022.0039 E. Hoffbauer, and M. Frank, "Four-Directional Ambisonic Spatial Decomposition Method With Reduced Temporal Artifacts," J. Audio Eng. Soc., vol. 70 Issue 12 pp. 1002-1014, (2022 December.). doi: https://doi.org/10.17743/jaes.2022.0039
Abstract: For the creation of convincing virtual acoustics of existing rooms and spaces, it is useful to apply measured Ambisonic room impulse responses (ARIRs) as a convolution reverb. Typically, tetrahedral arrays offering only first-order resolution are the preferred practical choice for measurements, because they are easily available and processed. In contrast, higher order is preferred in playback because it is superior in terms of localization accuracy and spatial clarity. There are a number of algorithms that enhance the spatial resolution of firstorder ARIRs. However, these algorithms may introduce coloration and artifacts. This paper presents an improvement of the Ambisonic Spatial Decomposition Method by using four directions simultaneously. The additional signals increase the echo density and thereby better preserve the diffuse sound field components during the process of enhancing measured firstorder ARIRs to higher orders. An instrumental validation and a series of listening experiments compare the proposed Four-Directional Ambisonic Spatial Decomposition Method to other existing algorithms and prove its similarity to the best algorithm in terms of enhanced spatial clarity and coloration while producing the least artifacts.

@article{hoffbauer2022four-directional,
author={hoffbauer, elias and frank, matthias},
journal={journal of the audio engineering society},
title={four-directional ambisonic spatial decomposition method with reduced temporal artifacts},
year={2022},
volume={70},
number={12},
pages={1002-1014},
doi={https://doi.org/10.17743/jaes.2022.0039},
month={december},} @article{hoffbauer2022four-directional,
author={hoffbauer, elias and frank, matthias},
journal={journal of the audio engineering society},
title={four-directional ambisonic spatial decomposition method with reduced temporal artifacts},
year={2022},
volume={70},
number={12},
pages={1002-1014},
doi={https://doi.org/10.17743/jaes.2022.0039},
month={december},
abstract={for the creation of convincing virtual acoustics of existing rooms and spaces, it is useful to apply measured ambisonic room impulse responses (arirs) as a convolution reverb. typically, tetrahedral arrays offering only first-order resolution are the preferred practical choice for measurements, because they are easily available and processed. in contrast, higher order is preferred in playback because it is superior in terms of localization accuracy and spatial clarity. there are a number of algorithms that enhance the spatial resolution of firstorder arirs. however, these algorithms may introduce coloration and artifacts. this paper presents an improvement of the ambisonic spatial decomposition method by using four directions simultaneously. the additional signals increase the echo density and thereby better preserve the diffuse sound field components during the process of enhancing measured firstorder arirs to higher orders. an instrumental validation and a series of listening experiments compare the proposed four-directional ambisonic spatial decomposition method to other existing algorithms and prove its similarity to the best algorithm in terms of enhanced spatial clarity and coloration while producing the least artifacts.},}

TY - paper
TI - Four-Directional Ambisonic Spatial Decomposition Method With Reduced Temporal Artifacts
SP - 1002 EP - 1014
AU - Hoffbauer, Elias
AU - Frank, Matthias
PY - 2022
JO - Journal of the Audio Engineering Society
IS - 12
VO - 70
VL - 70
Y1 - December 2022 TY - paper
TI - Four-Directional Ambisonic Spatial Decomposition Method With Reduced Temporal Artifacts
SP - 1002 EP - 1014
AU - Hoffbauer, Elias
AU - Frank, Matthias
PY - 2022
JO - Journal of the Audio Engineering Society
IS - 12
VO - 70
VL - 70
Y1 - December 2022
AB - For the creation of convincing virtual acoustics of existing rooms and spaces, it is useful to apply measured Ambisonic room impulse responses (ARIRs) as a convolution reverb. Typically, tetrahedral arrays offering only first-order resolution are the preferred practical choice for measurements, because they are easily available and processed. In contrast, higher order is preferred in playback because it is superior in terms of localization accuracy and spatial clarity. There are a number of algorithms that enhance the spatial resolution of firstorder ARIRs. However, these algorithms may introduce coloration and artifacts. This paper presents an improvement of the Ambisonic Spatial Decomposition Method by using four directions simultaneously. The additional signals increase the echo density and thereby better preserve the diffuse sound field components during the process of enhancing measured firstorder ARIRs to higher orders. An instrumental validation and a series of listening experiments compare the proposed Four-Directional Ambisonic Spatial Decomposition Method to other existing algorithms and prove its similarity to the best algorithm in terms of enhanced spatial clarity and coloration while producing the least artifacts.