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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Pelecanos, J. Povey, D. Ramaswamy, G. |
| Copyright Year | 2006 |
| Description | Author affiliation: Conversational Biometrics Group, IBM Thomas J. Watson Res. Center, Yorktown Heights, NY (Pelecanos, J.; Povey, D.; Ramaswamy, G.) |
| Abstract | This paper discusses the use of a secondary classifier to reweight the frame-based scores of a speaker recognition system according to which region in feature space they belong. The score mapping function is constructed to perform a likelihood ratio (LR) correction of the original LR scores. This approach has the ability to limit the effect of rogue model components and regions of feature space that may not be robust to different audio environments, handset types or speakers. Prior information available from tests on a development data set can be used to determine a log-likelihood-ratio mapping function that more appropriately weights each speech frame. The computational overhead for this approach in online mode is close to negligible for significant performance gains shown for the NIST 2004 Speaker Recognition Evaluation data |
| Sponsorship | The Inst. of Electr. and Electron. Eng., Inc. Circuits and Syst. Soc. (IEEE CASS) |
| File Size | 2409719 |
| File Format | |
| ISBN | 142440469X |
| ISSN | 15206149 |
| DOI | 10.1109/ICASSP.2006.1659969 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2006-05-14 |
| Publisher Place | France |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Speaker recognition Statistics Telephone sets Biometrics Robustness Testing Performance gain NIST Speech synthesis Bayesian methods |
| Content Type | Text |
| Resource Type | Article |
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