Lloyd R. Welch

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Lloyd Richard Welch is a noted American information theorist, and co-inventor of the Baum–Welch algorithm.

Welch received his B.S. in mathematics from the University of Illinois, 1951, and Ph.D. in mathematics from the California Institute of Technology, 1958, under advisor Frederic Bohnenblust. He worked at the Jet Propulsion Laboratory 1956–1959, Institute for Defense Analyses, 1959–1965, and University of Southern California, 1965–1999. He is a member of the National Academy of Engineering, IEEE Fellow, and received the 2003 Claude E. Shannon Award.

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Name	Welch, Lloyd R.
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Short description	American information theorist
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