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Model-based analysis of speech and audio signals for real-time processing based on time-varying lattice filters

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2 Author(s)
Schnell, K. ; Inst. of Appl. Phys., Goethe-Univ. Frankfurt, Frankfurt am Main ; Lacroix, A.

In this paper, a time-varying analysis procedure based on lattice filters is proposed for real-time processing. The analysis procedure estimates the reflection coefficients from the signal frames successively in a way that the current frame is analyzed with respect to previous frames. For that purpose, a linear coefficient trajectory covering the current and previous frames is estimated under condition that the left-sided starting value of the trajectory is prescribed by analysis results of previous frames. The coefficients of the current frame can be determined from the trajectory at a particular point. Analyses of speech signals show that the algorithm yields good spectral modeling simultaneously with a smooth time development.

Published in:

Acoustics, Speech and Signal Processing, 2009. ICASSP 2009. IEEE International Conference on

Date of Conference:

19-24 April 2009

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