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Late Reverberation Synthesis: From Radiance Transfer to Feedback Delay Networks

Hequn Bai 1, 2 Laurent Daudet Gael Richard 1, 2 
1 S2A - Signal, Statistique et Apprentissage
LTCI - Laboratoire Traitement et Communication de l'Information
Abstract : In room acoustic modeling, feedback delay networks (FDN) are known to efficiently model late reverberation due to their capacity to generate exponentially decaying dense impulses. However, this method relies on a careful tuning of the different synthesis parameters, either estimated from a pre-recorded impulse response from the real acoustic scene, or set manually from experience. In this paper, we present a new method, which still inherits the efficiency of the FDN structure, but aims at linking the parameters of the FDN directly to the geometry setting. This relation is achieved by studying the sound energy exchange between each delay line using the acoustic radiance transfer method (RTM). Experimental results show that the late reverberation modeled by this method is in good agreement with the virtual geometry setting.
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Submitted on : Friday, September 13, 2019 - 4:43:00 PM
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Hequn Bai, Laurent Daudet, Gael Richard. Late Reverberation Synthesis: From Radiance Transfer to Feedback Delay Networks. IEEE/ACM Transactions on Audio, Speech and Language Processing, Institute of Electrical and Electronics Engineers, 2015, 23 (12), pp.2260 - 2271. ⟨10.1109/TASLP.2015.2478116⟩. ⟨hal-02287205⟩



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