The Reassigned Bandwidth-Enhanced Method of Additive Synthesis
Fitz, Kelly Raymond
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https://hdl.handle.net/2142/81307
Description
Title
The Reassigned Bandwidth-Enhanced Method of Additive Synthesis
Author(s)
Fitz, Kelly Raymond
Issue Date
1999
Doctoral Committee Chair(s)
Haken, Lippold
Department of Study
Electrical Engineering
Discipline
Electrical Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Physics, Acoustics
Language
eng
Abstract
We introduce a highly manipulable, high fidelity additive sound model capable of representing transient sounds and sounds having significant nonsinusoidal energy. We represent sounds as a collection of bandwidth-enhanced partials having sinusoidal and noise-like characteristics. Partials are defined by a trio of synchronized breakpoint envelopes specifying the time-varying amplitude, center frequency, and noise content. Breakpoints for the partial envelopes are obtained by following ridges on a time-frequency surface computed by the method of reassignment. The Reassigned Bandwidth-Enhanced Model yields greater resolution in time and frequency than conventional additive techniques, and preserves noise-like and transient signals, even in modified reconstruction.
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