Investigations on inter-speaker variability in the feature space

R. Haeb-Umbach, in: ICASSP99 Phoenix, AZ, 1999.

Conference Paper | English
Abstract
We apply Fisher variate analysis to measure the effectiveness of speaker normalization techniques. A trace criterion, which measures the ratio of the variations due to different phonemes compared to variations due to different speakers, serves as a first assessment of a feature set without the need for recognition experiments. By using this measure and by recognition experiments we demonstrate that cepstral mean normalization also has a speaker normalization effect, in addition to the well-known channel normalization effect. Similarly vocal tract normalization (VTN) is shown to remove inter-speaker variability. For VTN we show that normalization on a per sentence basis performs better than normalization on a per speaker basis. Recognition results are given on Wall Street Journal and Hub-4 databases
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ICASSP99 Phoenix, AZ
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Haeb-Umbach R. Investigations on inter-speaker variability in the feature space. In: ICASSP99 Phoenix, AZ. ; 1999.
Haeb-Umbach, R. (1999). Investigations on inter-speaker variability in the feature space. In ICASSP99 Phoenix, AZ.
@inproceedings{Haeb-Umbach_1999, title={Investigations on inter-speaker variability in the feature space}, booktitle={ICASSP99 Phoenix, AZ}, author={Haeb-Umbach, Reinhold}, year={1999} }
Haeb-Umbach, Reinhold. “Investigations on Inter-Speaker Variability in the Feature Space.” In ICASSP99 Phoenix, AZ, 1999.
R. Haeb-Umbach, “Investigations on inter-speaker variability in the feature space,” in ICASSP99 Phoenix, AZ, 1999.
Haeb-Umbach, Reinhold. “Investigations on Inter-Speaker Variability in the Feature Space.” ICASSP99 Phoenix, AZ, 1999.

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