John R. (Jack) Deller, Jr. is professor of electrical and computer engineering at Michigan State University where he directs the Speech Processing Laboratory. He received the 1998 IEEE Signal Processing Magazine Best Paper Award and the 1997 IEEE Signal Processing Society Meritorious Service Award for his six-year service as editor in chief of the IEEE Signal Processing Magazine. Dr. Deller is the coauthor of Digital Signal Processing and the Microcontroller (Prentice Hall, 1999) and currently serves as associate editor of the IEEE Transactions on Speech and Audio Processing. He is a Fellow of the IEEE.

John H. L. Hansen is an associate professor at the University of Colorado at Boulder; he holds appointments in the Department of Speech, Language, and Hearing Sciences and in the Department of Electrical and Computer Engineering. Dr. Hansen serves as associate director for the Center for Spoken Language Understanding (CSLU) and director of research activities of the Robust Speech Processing Laboratory at CSLU. He has served as technical advisor to the U.S. delegate for NATO, and he is associate editor of the IEEE Transactions on Speech and Audio Processing and of the IEEE Signal Processing Letters. Dr. Hansen received the 1990 National Science Foundation Research Initiation Award and has been named a Lilly Foundation Teaching Fellow for contributions to the advancement of engineering education.

John G. Proakis is a faculty member of the Electrical and Computer Engineering Department at Northeastern University. His professional experience is in the general area of digital communications and digital signal processing. Dr. Proakis is the author of Digital Communications (McGraw-Hill, 3rd ed., 1995) and the coauthor of Introduction to Digital Signal Processing (Prentice Hall, 3rd ed., 1996); Advanced Digital Signal Processing (Macmillan, 1992); Communication Systems Engineering (Prentice Hall, 1994); Digital Signal Processing Using MATLAB (PWS, 1997); and Contemporary Communication Systems Using MATLAB (PWS, 1998). He is a Life Fellow of the IEEE.