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ITRW on Non-Linear Speech Processing (NOLISP 05)Barcelona, Spain |
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ITRW on Non-Linear Speech Processing (NOLISP 05)Barcelona, Spain |
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An approach to pitch mark determination using Poincaré sections is presented. While speech has been interpreted in terms of nonlinear systems theory for quite some time, not much effort has been made to exploit this knowledge in the problem of pitch mark detection. This algorithm uses nonlinear state space embedding and calculates the Poincaré section at a chosen point in state space. Pitch marks are then found at the crossing of the trajectories with the Poincaré plane in a certain neighborhood of the initial point. The procedure is performed frame-wise to account for the changing dynamics of the speech production system. First results show promising performance, comparable to the pitch marking algorithm used in Praat.
Bibliographic reference. Hagmüller, Martin / Kubin, Gernot (2005): "Poincar sections for pitch mark determination", In NOLISP-2005, 107-113.