Publications
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Speaker Clustered Regression-Class Trees for MLLR Adaptation
A speaker clustering algorithm is presented that is based on an eigenspace representation of Maximum Likelihood Linear Regression (MLLR) transformations and is used for training cluster-dependent regression-class trees for MLLR…
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Within-Class Covariance Normalization for SVM-based Speaker Recognition
This paper extends the within-class covariance normalization (WCCN) technique described for training generalized linear kernels.
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Investigation on Mandarin Broadcast News Speech Recognition
This paper describes our efforts in building a competitive Mandarin broadcast news speech recognizer. We present two novel algorithms in smoothing pitch features and segmenting Chinese characters into word units.
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Mystery Powders: An Application Of The Padi Design System Using The Four-Process Delivery System (Padi Technical Report 15)
This report illustrates how the general principles and structural components of the PADI framework were applied to a Mystery Powders assessment demonstration project that was computer-based. The body of this…
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Globe Year 10 Evaluation: Into The Next Generation
This is the 10th in a series of annual evaluation reports that SRI has submitted to the GLOBE Program since the Program’s inception in 1995.
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Implications Of Evidence-Centered Design For Educational Testing (Technical Report 17)
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Enriching Speech Recognition with Automatic Detection of Sentence Boundaries and Disfluencies
This paper describes a metadata detection system that combines information from different types of textual knowledge sources with information from a prosodic classifier. We investigate maximum entropy and conditional random…
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Assessing Local Item Dependence In Building Explanation Tasks (Padi Technical Report 14)
A common practice in the assessment of science education is to have a shared stimulus followed by a number of questions. In these cases, one might doubt the usual assumption…
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QASR: Question Answering Using Semantic Roles for Speech Interface
In this paper, we evaluate a semantic role labeling approach to the extraction of answers in the open domain question answering task. We show that this technique especially improves the…
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Machine Translation Research at SRI
An outline of the many machine translation research programs at SRI in 2006.
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A Heritage of Innovation: SRI’s First Half Century
From its beginnings at Stanford University, where it was intended to serve industry in the Western United States, SRI has grown to a worldwide research organization.
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Proving Authentication Properties in the Protocol Derivation Assistant
In the present paper, we introduce an axiomatic theory of authentication suitable for the automatic proof of authentication properties. We describe a proof of the authentication property of a simple…