Non-stationary Self-consistent Acoustic Objects as Atoms of Voiced Speech

Autor:	Friedhelm R. Drepper
Rok vydání:	2007
Předmět:	Nonlinear system Signal processing Computer Science::Sound Computer science Speech recognition Feature vector Primary response Self consistent Invariant (mathematics) Speaker recognition Phase modulation
Zdroj:	Advances in Nonlinear Speech Processing ISBN: 9783540773467 NOLISP
DOI:	10.1007/978-3-540-77347-4_16
Popis:	To account for the strong non-stationarity of voiced speech and its nonlinear aero-acoustic origin, the classical source-filter model is extended to a cascaded drive-response model with a conventional linear secondary response, a synchronized and/or synchronously modulated primary response and a non-stationary fundamental drive which plays the role of the long time-scale part of the basic time-scale separation of acoustic perception. The transmission protocol of voiced speech is assumed to be based on non-stationary acoustic objects which can be synthesized as the described secondary response and which are analysed by introducing a self-consistent (filter stable) part-tone decomposition, suited to reconstruct the hidden fundamental drive and to confirm its topological equivalence to a glottal master oscillator. The filter-stable part-tone decomposition opens the option of a phase modulation transmission protocol of voiced speech. Aiming at communication channel invariant acoustic features of voiced speech, the phase modulation cues are expected to be particularly suited to extend and/or replace the classical feature vectors of phoneme and speaker recognition.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c79f8115038abf989ec7294e0eda1bd0 https://doi.org/10.1007/978-3-540-77347-4_16 Zobrazit plný text záznamu