Abstract
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 proto col 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 decom position, suited to reconstruct the hidden funda mental drive and to confirm its topo logical equivalence to a glottal master oscillator. The filter-stable part-tone decomposition opens the option of a phase modulation trans mission protocol of voiced speech. Aiming at communi cation 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.
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Drepper, F.R. (2007). Non-stationary Self-consistent Acoustic Objects as Atoms of Voiced Speech. In: Chetouani, M., Hussain, A., Gas, B., Milgram, M., Zarader, JL. (eds) Advances in Nonlinear Speech Processing. NOLISP 2007. Lecture Notes in Computer Science(), vol 4885. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-77347-4_16
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DOI: https://doi.org/10.1007/978-3-540-77347-4_16
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