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Justinian Rosca's Picture Justinian Rosca
Ph.D. - Computer Science, University of Rochester


Program Manager - Audio & Signal Processing Solutions

Siemens Corporate Research

Room D221

Multimedia and Video Technology

755 College Road East , Princeton, New Jersey 08540, USA

Voice (609) 734-3365

Fax (609) 734-6565

Email: justinian.roscasiemens.com

Epistle:

"When, at night, with drooping eyelids, I blow out the candles flare

Time's unending path is followed only by the old clock there;

For just draw aside the curtains and the moon will flood the room

With a fire of passions summoned by the arduous of her gloom;

From the night of recollection she will resurrect an eon

Of distress - which we, however, sense as in a dream-like paean."


Mihai Eminescu

Since joining Siemens Corporate Research, I have been interested in the blind source separation problem and generally in audio and statistical signal processing applications. I consider it fascinating to disentangle sounds and in particular speech from a virtually incomprehensible mixture of voice signals and noise. Practical solutions to such difficult problems raise interesting theoretical issues related to the representation of signals (henceforth interest in sparse representations) and models appropriate for statistical estimation. Computational learning and machine learning as well stochastic search techniques are a continuation of interest during graduate school days. My Ph.D. dissertation dealt with the the scaling problem in learning, methods for coupling learning and simulated evolution, the study of emergence of self-organization, global optimization and search, and adaptive principles. Application areas included learning structure (e.g. modular neural networks and Bayesian networks), signal analysis and feature discovery, knowledge discovery. My enthusiasm was modeled "naturally" by my dissertation advisor, Prof. Dana Ballard, and the effect persists :-)

  The research presented at this Web Site has been sponsored by  Siemens Corporate Research (1998-2003)  and National Science Foundation Grants (1992-1197).
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