8th Annual Conference of the International Speech Communication Association

Antwerp, Belgium
August 27-31, 2007

Time-Varying Pre-Emphasis and Inverse Filtering of Speech

Karl Schnell, Arild Lacroix

Goethe-University Frankfurt, Germany

In this contribution, a time-varying linear prediction method is applied to speech processing. In contrast to the commonly used linear prediction approach, the proposed time-varying method considers the continuous time evolution of the vocal tract and, additionally, avoids block-wise processing. On the assumption that the linear predictor coefficients evolve linearly in sections and continuously over the whole signal, the optimum time-varying coefficients can be determined quasi-analytically by a least mean square approach. The investigations show that the method fits very well the realization of a time-varying pre-emphasis. Furthermore, the results show that the method is suitable for time-varying inverse filtering.

Full Paper

Bibliographic reference.  Schnell, Karl / Lacroix, Arild (2007): "Time-varying pre-emphasis and inverse filtering of speech", In INTERSPEECH-2007, 530-533.