Scattering in Feedback Delay Networks
Schlecht SJ, Habets E (2020)
Publication Type: Journal article
Publication year: 2020
Journal
Book Volume: 28
Pages Range: 1915-1924
Article Number: 9113451
DOI: 10.1109/TASLP.2020.3001395
Abstract
Feedback delay networks (FDNs) are recursive filters, which are widely used for artificial reverberation and decorrelation. One central challenge in the design of FDNs is the generation of sufficient echo density in the impulse response without compromising the computational efficiency. In a previous contribution, we have demonstrated that the echo density of an FDN can be increased by introducing so-called delay feedback matrices where each matrix entry is a scalar gain and a delay. In this contribution, we generalize the feedback matrix to arbitrary lossless filter feedback matrices (FFMs). As a special case, we propose the velvet feedback matrix, which can create dense impulse responses at a minimal computational cost. Further, FFMs can be used to emulate the scattering effects of non-specular reflections. We demonstrate the effectiveness of FFMs in terms of echo density and modal distribution.
Authors with CRIS profile
Emanuël Habets
Professur für wahrnehmungsbasierte räumliche Audiosignalverarbeitung (AudioLabs) (Stiftungsprofessur)
Involved external institutions
Finland (FI)How to cite
APA:
Schlecht, S.J., & Habets, E. (2020). Scattering in Feedback Delay Networks. IEEE/ACM Transactions on Audio, Speech and Language Processing, 28, 1915-1924. https://dx.doi.org/10.1109/TASLP.2020.3001395
MLA:
Schlecht, Sebastian J., and Emanuël Habets. "Scattering in Feedback Delay Networks." IEEE/ACM Transactions on Audio, Speech and Language Processing 28 (2020): 1915-1924.
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