Parametric Late Reverberation from Broadband Directional Estimates

Loading...
Thumbnail Image
Access rights
openAccess
Journal Title
Journal ISSN
Volume Title
Conference article in proceedings
Date
2021-09-10
Major/Subject
Mcode
Degree programme
Language
en
Pages
10
1-10
Series
2021 Immersive and 3D Audio: from Architecture to Automotive (I3DA)
Abstract
Several parametric spatial room impulse response rendering methods use broadband directional estimates, whereby based on sample-by-sample direction-of-arrival estimation, a single channel room impulse response is distributed to multiple loudspeakers. To this end, it has been unclear how such simple parametric processing behaves in the late part of the response. To assess this question, we use simulations and a measurement to show that the commonly applied estimation methods based on the pseudo intensity vector and time difference of arrival estimation do preserve the directional information in the late response. Also, we show that estimated directional differences can be audible under best case conditions. As broadband rendering can sound ‘rough’ or ‘grainy’ for transient input signals due to insufficient pulse density in individual reproduction channels, we use a method to synthesize smooth sounding spatial reverberation. For this, the broadband estimates are used to calculate directional energy envelopes, which are applied to filtered noise sequences. The findings presented here help assessing and improving spatial room impulse response processing methods.
Description
Keywords
Loudspeakers, Three-dimensional displays, Time difference of arrival, Estimation, Rendering (computer graphics), Time measurement, Broadband communication
Other note
Citation
Meyer-Kahlen, N, Schlecht, S J & Lokki, T 2021, Parametric Late Reverberation from Broadband Directional Estimates . in 2021 Immersive and 3D Audio: from Architecture to Automotive (I3DA) ., 9610928, IEEE, pp. 1-10, International Conference on Immersive and 3D Audio, Bologna, Italy, 08/09/2021 . https://doi.org/10.1109/I3DA48870.2021.9610928