Connections Between Parallel and Serial Combinations of Comb Filters and Feedback Delay Networks

Konferenz: IWAENC 2012 - International Workshop on Acoustic Signal Enhancement
04.09.2012-06.09.2012 in Aachen, Germany

Tagungsband: IWAENC 2012

Seiten: 4Sprache: EnglischTyp: PDF

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Schlecht, Sebastian J.; Habets, Emanuël A.P. (International Audio Laboratories Erlangen, University of Erlangen-Nuremberg and Fraunhofer IIS, Germany)

Comb filters composed in a parallel or a serial way are a popular part of delay-line based artificial reverberators. Because the analysis of a complex comb filter structure can be tedious, there is a need for transforming such a structure into a compact and general representation. For this a transformation into the feedback delay network (FDN) filter structure is proposed as it is a general and well established framework to investigate the acoustic properties of the filter and therefore allows to compare different approaches. Index Terms — comb filter, feedback delay network, artificial reverberation