A system for sound analysis/transformation/synthesis based on a deterministic plus stochastic decomposition
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- dc.contributor.author Serra, Xavierca
- dc.date.accessioned 2018-03-08T10:12:56Z
- dc.date.available 2018-03-08T10:12:56Z
- dc.date.issued 1989
- dc.description.abstract This dissertation introduces a new analysis/synthesis method. It is designed to obtain musically useful intermediate representations for sound transformations. The method’s underlying model assumes that a sound is composed of a deterministic component plus a stochastic one. The deterministic component is represented by a series of sinusoids that are described by amplitude and frequency functions. The stochastic component is represented by a series of magnitude-spectrum envelopes that function as a time-varying filter excited by white noise. Together these representations make it possible for a synthesized sound to attain all the perceptual characteristics of the original sound. At the same time the representation is easily modified to create a wide variety of new sounds. This analysis/synthesis technique is based on the short-time Fourier transform (STFT). From the set of spectra returned by the STFT, the relevant peaks of each spectrum are detected and used as breakpoints in a set of frequency trajectories. The deterministic signal is obtained by synthesizing a sinusoid from each trajectory. Then, in order to obtain the stochastic component, a set of spectra of the deterministic component is computed, and these spectra are subtracted from the spectra of the original sound. The resulting spectral residuals are approximated by a series of envelopes, from which the stochastic signal is generated by performing an inverse-STFT. The result is a method that is appropriate for the manipulation of sounds. The intermediate representation is very flexible and musically useful in that it offers unlimited possibilities for transformation.
- dc.format.mimetype application/pdf
- dc.identifier.citation Serra X. A system for sound analysis/transformation/synthesis based on a deterministic plus stochastic decomposition [dissertation]. [Stanford]: Stanford University; 1989. 166 p.
- dc.identifier.uri http://hdl.handle.net/10230/34072
- dc.language.iso eng
- dc.publisher Stanford University
- dc.rights Aquest document està subjecte a una llicència Creative Commons
- dc.rights.accessRights info:eu-repo/semantics/openAccess
- dc.rights.uri https://creativecommons.org/licenses/by-nc/3.0/es/
- dc.subject.other So -- Enregistrament i reproducció -- Tècniques digitals
- dc.title A system for sound analysis/transformation/synthesis based on a deterministic plus stochastic decompositionca
- dc.type info:eu-repo/semantics/doctoralThesis
- dc.type.version info:eu-repo/semantics/publishedVersion