H W Sabrin

Publications of H W Sabrin

• Speaker classification using composite hypothesis testing and list decoding

  Authors: W.J.J. Roberts, Y. Ephraim, H.W. Sabrin

  Speech and Audio Processing, IEEE Transactions on. 04/2005;

  Speaker classification is seen as a hypothesis testing problem of J simple hypotheses and a composite hypothesis. The simple hypotheses represent target speakers while the composite hypothesisSpeaker classification is seen as a hypothesis testing problem of J simple hypotheses and a composite hypothesis. The simple hypotheses represent target speakers while the composite hypothesis represents nontarget speakers. The simple hypotheses have well-defined distributions that are estimated from training signals. The distribution of the signal under the composite hypothesis is assumed to belong to a given family. The parameter of that distribution is assumed random with a prior distribution that is estimated from a large set of speakers. This formulation converts the problem to that of testing J+1 simple hypotheses. Signals corresponding to target and nontarget speakers are assumed Gaussian mixtures processes. Once the system has been trained, list decoding is applied in which a test signal is associated with a list of possible speakers. The probability that the correct speaker is on the list is maximized for a given average number of incorrect speakers on the list. Results from speaker identification and speaker verification experiments are reported. In speaker identification using a National Institute of Standards and Technology (NIST) database with 174 target speakers, over 77% correct identification was achieved for an average of less than two erroneous speakers on the list. Speaker verification experiments on a similar database yielded results, expressed in terms of the equal-error-rate, of 6.7% and 10.1% using two decision rules.

• The effect of imposed fixational eye movements on binocular rivalry.

  Authors: H W Sabrin, A E Kertesz

  Perception & psychophysics. 09/1983; 34(2):155-7.

• The unreliability of nonius line estimates of vertical fusional vergence performance.

  Authors: A E Kertesz, D R Hampton, H W Sabrin

  Vision research. 02/1983; 23(3):295-7.

• Microsaccadic eye movements and binocular rivalry.

  Authors: H W Sabrin, A E Kertesz

  Perception & psychophysics. 09/1980; 28(2):150-4.