ISCA Archive Interspeech 2008
ISCA Archive Interspeech 2008

DC-constrained linear prediction for glottal inverse filtering

Paavo Alku, Carlo Magi, Tom Bäckström

Closed phase covariance (CP) analysis is a glottal inverse filtering method which estimates the vocal tract during the glottal closed phase. Since closed phase durations are typically short, the vocal tract computation with linear prediction is vulnerable to the covariance frame position. This study proposes a modified CP algorithm in which a DC-gain constraint is imposed in optimizing the linear predictive inverse model of the vocal tract. Results show that the algorithm improves the robustness of the CP analysis on the covariance frame position.

doi: 10.21437/Interspeech.2008-698

Cite as: Alku, P., Magi, C., Bäckström, T. (2008) DC-constrained linear prediction for glottal inverse filtering. Proc. Interspeech 2008, 2861-2864, doi: 10.21437/Interspeech.2008-698

  author={Paavo Alku and Carlo Magi and Tom Bäckström},
  title={{DC-constrained linear prediction for glottal inverse filtering}},
  booktitle={Proc. Interspeech 2008},