Title :
Combination strategies for a factor analysis phone-conditioned speaker verification system
Author :
Scheffer, Nicolas ; Vogt, Robbie ; Kajarekar, Sachin ; Pelecanos, Jason
Author_Institution :
SRI Int., Queensland Univ. of Technol., Brisbane, QLD
Abstract :
This work aims to take advantage of recent developments in joint factor analysis (JFA) in the context of a phonetically conditioned GMM speaker verification system. Previous work has shown performance advantages through phonetic conditioning, but this has not been shown to date with the JFA framework. Our focus is particularly on strategies for combining the phone-conditioned systems. We show that the classic fusion of the scores is suboptimal when using multiple GMM systems. We investigate several combination strategies in the model space, and demonstrate improvement over score-level combination as well as over a non-phonetic baseline system. This work was conducted during the 2008 CLSP Workshop at Johns Hopkins University.
Keywords :
speaker recognition; Johns Hopkins University; joint factor analysis; nonphonetic baseline system; phone-conditioned speaker verification system; Concatenated codes; Gaussian processes; Microphones; Noise measurement; Performance analysis; Protocols; Robustness; Speaker recognition; Stacking; Statistics; JHU workshop; joint factor analysis; phonetic GMM; robust speaker ID;
Conference_Titel :
Acoustics, Speech and Signal Processing, 2009. ICASSP 2009. IEEE International Conference on
Conference_Location :
Taipei
Print_ISBN :
978-1-4244-2353-8
Electronic_ISBN :
1520-6149
DOI :
10.1109/ICASSP.2009.4960518