Data processing: speech signal processing – linguistics – language – Speech signal processing – Recognition
Reexamination Certificate
2011-05-17
2011-05-17
Saint Cyr, Leonard (Department: 2626)
Data processing: speech signal processing, linguistics, language
Speech signal processing
Recognition
C704S246000, C704S251000, C704S252000
Reexamination Certificate
active
07945444
ABSTRACT:
In detection systems, such as speaker verification systems, for a given operating point range, with an associated detection “cost”, the detection cost is preferably reduced by essentially trading off the system error in the area of interest with areas essentially “outside” that interest. Among the advantages achieved thereby are higher optimization gain and better generalization. From a measurable Detection Error Tradeoff (DET) curve of the given detection system, a criterion is preferably derived, such that its minimization provably leads to detection cost reduction in the area of interest. The criterion allows for selective access to the slope and offset of the DET curve (a line in case of normally distributed detection scores, a curve approximated by mixture of Gaussians in case of other distributions). By modifying the slope of the DET curve, the behavior of the detection system is changed favorably with respect to the given area of interest.
REFERENCES:
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patent: 6029124 (2000-02-01), Gillick et al.
patent: 6539352 (2003-03-01), Sharma et al.
patent: 2003/0016726 (2003-01-01), Pavlidis
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Navratil Jiri
Ramaswamy Ganesh N.
Cyr Leonard Saint
Nuance Communications Inc.
Wolf Greenfield & Sacks P.C.
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