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Stefan Winkler is a Distinguished Scientist in the Advanced Digital Sciences Center. He also serves as Scientific Advisor to Cheetah Technologies. In 2001, he co-founded Genista, which was acquired by Symmetricom and subsequently by Cheetah Technologies. He has also held assistant professor positions at the National University of Singapore (NUS) and the University of Lausanne, Switzerland. Dr. Winkler has published more than 60 papers and is the author of the book Digital Video Quality. He also serves as an Associate Editor for the IEEE Transactions on Image Processing.