Dr. Douglas Reynolds is a senior member of the technical staff at Lincoln Laboratory, where he provides technical oversight of the speech projects in speaker and language recognition and speech-content based information retrieval.
In 1989 and 1991, he was a summer staff member of the Information Systems Technology Group (formerly known as the Speech Systems Technology Group) at MIT Lincoln Laboratory, researching speaker recognition, developing the use of Gaussian mixture models (GMMs) for text-independent speaker representations.
Dr. Reynolds joined what is now the Human Language Technology Group as a member of technical staff in 1992 conducting research in the areas of robust speaker recognition (identification and verification), transient classification and robust speech representations for recognition. During this period, he invented and developed several widely used techniques in the area of speaker recognition, such as robust modeling with GMMs, application of a universal background model to text-independent recognition tasks, the use of Bayesian adaptation to train and update speaker models, fast scoring techniques for GMM based systems, the development and use of a handset/channel-type detector, and several normalization techniques based on the handset/channel-type detector.
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