Prof. Bernd Girod : 2012 Plenary Session


Tuesday, April 3, 2012
Location: Fisher Conference Center, Arrillaga Alumni Center

"ClassX - How Zoomable Video Is Transforming Lecture Capture"
3:00pm - 3:30pm


Conventional lecture capture systems rely on expensive recording and production equipment and require a camera operator. A less costly alternative is the combination of an HD camcorder with interactive region-of-interest (IRoI) video streaming technology, which allows each user to interactively control pan, tilt, and zoom during playback. This is familiar for high-resolution stills (say satellite imagery and maps), but not yet ubiquitous for video. I will report our experiences with ClassX, an experimental IRoI video streaming platform for capturing lectures and seminars at Stanford University. In addition to "zoomable video," the system uses computer vision for automatic tracking of the lecturer and synchronization of digital presentation slides, thus eliminating most human intervention for producing a compelling interactive viewing experience and reducing cost by two orders of magnitude. ClassX works with Silverlight, Flash, iOS, and Android clients and is available as open source software at


Bernd Girod is Professor of Electrical Engineering and (by courtesy) Computer Science in the Information Systems Laboratory of Stanford University, California, since 1999. Previously, he was a Professor in the Electrical Engineering Department of the University of Erlangen-Nuremberg. His current research interests are in the areas of video compression, networked media systems, and image-based retrieval. He has published over 450 conference and journal papers, as well as 5 books, receiving the EURASIP Signal Processing Best Paper Award in 2002, the IEEE Multimedia Communication Best Paper Award in 2007, the EURASIP Image Communication Best Paper Award in 2008, the EURASIP Signal Processing Most Cited Paper Award in 2008, as well as the EURASIP Technical Achievement Award in 2004 and the Technical Achievement Award of the IEEE Signal Processing Society in 2011. As an entrepreneur, Professor Girod has been involved with several startup ventures, among them Polycom, Vivo Software, 8x8, and RealNetworks. He received an Engineering Doctorate from University of Hannover, Germany, and an M.S. Degree from Georgia Institute of Technology. Prof. Girod is a Fellow of the IEEE, a EURASIP Fellow, and a member of the German National Academy of Sciences (Leopoldina).