Henrik Botterweck
Philips
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Featured researches published by Henrik Botterweck.
international conference on acoustics, speech, and signal processing | 2001
Henrik Botterweck
A general method is examined, which unifies the eigenvoice approach and MAP adaptation. The a priori distribution for MAP is chosen to be anisotropic with the eigenvoices as preferred directions while still allowing adaptation into all other directions. This allows the exploitation of a priori knowledge about typical speaker variability within the MAP framework. This approach has two advantages: long term adaptation leads to the same good results as the MAP method, whereas for ultra-short adaptation in the range of 1-2 seconds an overfitting as for maximum likelihood techniques is avoided. The method is applied to large vocabulary continuous speech recognition. Results are to be compared with our transfer of the maximum likelihood eigenvoice method to LVCSR (Botterweck 2000). Even after only one recognized word significant improvements of the WER of up to 6% relative are observed for gender independent recognition. 14% improvements are obtained after 5 seconds.
Archive | 2004
Lothar Spies; Henrik Botterweck; Juergen Weese
Archive | 2004
Henrik Botterweck; Lothar Spies
Archive | 2001
Henrik Botterweck
Archive | 2006
Herfried Karl Wieczorek; Rolf Bippus; Henrik Botterweck; Andreas Goedicke
Archive | 2009
Henrik Botterweck
Archive | 2009
Henrik Botterweck
Bildverarbeitung für die Medizin | 2010
Rolf Bippus; Andreas Goedicke; Henrik Botterweck
Society of Nuclear Medicine Annual Meeting Abstracts | 2008
Rolf Bippus; Henrik Botterweck; Herfried Wieczorek
Archive | 2006
Herfried Karl Wieczorek; Rolf Bippus; Henrik Botterweck; Andreas Goedicke