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Speech & natural language publications May 1, 2006 Conference Paper

The Contribution of Cepstral and Stylistic Features to SRI’s 2005 NIST Speaker Recognition Evaluation System

SRI International May 1, 2006

Abstract

Recent work in speaker recognition has demonstrated the advantage of modeling stylistic features in addition to traditional cepstral features, but to date there has been little study of the relative contributions of these different feature types to a state-of-the-art system. In this paper we provide such an analysis, based on SRI’s submission to the NIST 2005 Speaker Recognition Evaluation. The system consists of 7 subsystems (3 cepstral, 4 stylistic). By running independent N-way subsystem combinations for increasing values of N, we find that (1) a monotonic pattern in the choice of the best N systems allows for the inference of subsystem importance; (2) the ordering of subsystems alternates between cepstral and stylistic; (3) syllable-based prosodic features are the strongest stylistic features, and (4) overall subsystem ordering depends crucially on the amount of training data (1 versus 8 conversation sides). […]

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