Ran D. Zilca
Conversational Biometrics Group
Human Language Technologies
Ran D. Zilca received the B.S. degree (honors) in electrical engineering from Ben Gurion University, Israel, in 1993, and the M.S. degree in electrical engineering from Tel Aviv University, Israel, in 1997.
From 1993 to 1999 he was with the Israel Defense Forces (IDF), where he managed different research and development groups working on interdisciplinary projects involving signal processing, pattern recognition, and data mining.
From 1999 to 2001 he was a research scientist with the R&D division of Amdocs, Israel, where he conducted research in text independent speaker recognition for landline and cellular environments, focusing on computationally efficient large population open-set speaker identification. During this time, he also managed a group of developers working on a robust voice portal for cellular providers.
In 2001 he joined the Human Language Technology Department at the IBM T. J. Watson Center in Yorktown Heights NY, where he is conducting research in robust and efficient speaker recognition and interaction models for secure remote user authentication.
His current research interests include statistical pattern recognition, statistical modeling, and robust speaker verification and identification. Ran is a senior member of IEEE.
- R. D. Zilca, B. Kingsbury, J. Navratil, G. Ramaswamy, “Pseudo Pitch Synchronous Analysis of Speech,” to appear in IEEE tran. Speech and audio proc.
- J. H. Nealand, J. W. Pelecanos, R. D. Zilca, and G. N. Ramaswamy, "A Study of the Relative Importance of Temporal Characteristics In Text-Dependent and Text-Constrained Speaker Verification," ICASSP 2005.
- J. Navratil, G. N. Ramaswamy, R. D Zilca, “Statistical Model Migration in Speaker Recognition,” ICSLP 2004.
- R. D. Zilca, J. W. Pelecanos, U. V. Chaudhari, and G. N. Ramaswamy,
"Real Time Robust Speech Detection for Text Independent Speaker
Recognition," Odyssey speaker and language recognition workshop 6/2004.
- J. Navratil, G. N. Ramaswamy, and R. D. Zilca, "Statistical Model
Migration in Speaker Recognition," ICSLP 2004.
- R. D. Zilca, J. Navratil, and G. N. Ramaswamy, "Syncpitch: A Pseudo
Pitch Synchronous Algorithm for Speker Recognition," EUROSPEECH 2003.
- G. N. Ramaswamy, R. D. Zilca, and O. Alecksandrovich, "A
Programmable Policy Manager for Conversational Biometrics," EUROSPEECH
- R. D. Zilca, J. Navratil, and G. N. Ramaswamy, "Depitch and the Role
of Fundamental Frequency in Speaker Recognition," ICASSP 2003.
- G. N. Ramaswamy, J. Navratil, U. V. Chadhari, and R. D. Zilca, "The
IBM System for the NIST 2002 Cellular Speaker Verification Evaluation,"
- R. D. Zilca, "Text Independent Speaker Verification using Utterance
Level Scoring and Covariance Modeling," IEEE tran. Speech and audio
proc., September 2002.
- R. D. Zilca, U. Chaudhari, and G. Ramaswamy, "The Sphericity Measure
for Cellular Speaker Verification," ICASSP 2002.
- U. Chaudhari, J. Navratil, G. Ramaswamy, and R. Zilca, "Future
Speaker Recognition Systems - Challenges and Solutions", AutoID-2002,
Tarrytown, NY March 2002.
- R. D. Zilca, "Using Second Order Statistics for Text Independent
Speaker Verification", Odyssey 2001 Speaker Recognition Workshop,
Crete-Greece, June 2001.
- R. D. Zilca, "Text Independent Speaker Verification using Covariance
Modeling", IEEE Signal Processing Letters, April 2001.
- R. D. Zilca and Y. Bistritz, "Distance Based Gaussian Mixture Model
for Speaker Recognition", ICSLP-2000, Beijing 10/2000.
- R. D. Zilca and Y. Bistritz, "Feature Concatenation for Speaker
Identification", European Signal Processing Conference, Tampere,
- R. D. Zilca and Y. Bistritz, "Text Independent Speaker
Identification using LSP Codebook Speaker Models and Linear Discriminant
Functions", Eurospeech 9/99, Budapest.
- S. Grinberg, H. Guterman, R. Sharon, and R. Zilca "Translation,
rotation and scale invariant image classifier using an artificial neural
network", Israeli Information Processing Conference, 12/93, Israel.
US6772119 Computationally Efficient Method and Apparatus for Speaker Recognition.
List available upon request.
Thomas J. Watson Research Center
Rt. 134, Room
Yorktown Heights, NY 10598 U.S.A.
Fax.: (914) 945-4490