Publications
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Localization in Horizontal-Only Ambisonic Systems
We test the localization of horizontal-only Ambisonic reproduction systems using various test signals to separately evaluate low-frequency and mid-frequency localization.
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Infusing IT/STEM Skill Standards in Informal ITEST Learning
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A Study in Machine Learning from Imbalanced Data for Sentence Boundary Detection in Speech
We have constructed a hidden Markov model (HMM) system to detect sentence boundaries that uses both prosodic and textual information. Since there are more non-sentence boundaries than sentence boundaries in…
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Morphology-based Language Modeling for Conversational Arabic Speech Recognition
In this paper, we investigate improvements in Arabic language modeling by developing various morphology-based language models. We present four different approaches to morphology-based language modeling, including a novel technique called…
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Posture-based data protection
We introduce Posture-Based Data Protection (PBDP), which encrypts data using keys available to a device only when it has been verified to be in a known good state, and has…
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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…