TITLE: Optimal Subband Coders for Data Compression
DATE/TIME: Wednesday 18 September 1996 at 6:00 PM
LOCATION: Paradyne, 8550 Ulmerton Road, Building E, Room 101
SPEAKER: Dr. P.P.Vaidyanathan
RESERVATIONS: Contact Cathy McDonough at 381-2000 Ext 2559
SUMMARY:
Subband coding is a well known technique for lossy data compression and has been widely used in speech, music, and image compression practice. However, unlike transform coding theory, the theory of optimal subband coders is only beginning to be understood . In this talk we begin with a brief overview of known results and open problems and then give a detailed presentation of optimal subband coders. In particular we consider the problem of designing the analysis filters in an orthonormal subband coder in such a way that the coding gain is maximized. Some less-known differences between subband coders and transform coders, and their connection tothe energy compaction problem will also be highlighted.
ABOUT THE SPEAKER:
P. P. Vaidyanathan was born in Calcutta, India. He received degrees in physics, radiophysics, and electronics from the University of Calcutta, and a Ph.D degree in electrical and computer engineering from the University of California at Santa Barbara, where he also served as a post doctoral fellow. In 1983 he joined the Electrical Engineering Department of the Calfornia Institute of Technology as an Assistant Professor, and since 1993 has been Professor of Electrical Engineering there. His main research i nterests are in digital signal processing, multirate systems, wavelet transforms, and adaptive filtering.
Dr. Vaidyanathan served as Vice-Chairman of the Technical Program Committee for the 1983 IEEE International Symposium on Circuits and Systems, and as the Technical Program Chairman for the 1992 IEEE International symposium on Circuits and Systems. He was an Associate Editor for the IEEE Transactions on Circuits and Systems from 1985-1987, and is currently an associate editor for IEEE Signal Processing letters and a consulting editor for Applied and Computational Harmonic Analysis. Dr. Vaidyanathan has authored many papers in IEEE journals and is the author of the book Multirate Systems and Filter Banks, as well as several chapters for various signal processing handbooks. He has won several awards for teaching from Cal Tech and research from NSF (Presiden tial Young Investigator Award). In 1989 he received the IEEE ASSP Senior Award for his paper on multirate perfect-reconstruction filter banks. In 1990 he was recepient of the S. K. Mitra Memorial Award from the Institute of Electronics and Telecommuncatio ns Engineers, India, for his joint paper in the IETE journal. Dr. Vaidyanathan was elected Fellow of the IEEE in 1991. He is the 1995 recepient of the F. E. Terman award for Electrical Engineering Education, awarded by the ASEE and sponsored by Hewlett P ackard Company. He is one of the distinguished lecturers of the IEEE Signal Processing Society for the year 1996-97.
DIRECTIONS:
From Tampa, take I275 South over the Howard Franklin Bridge. Take the second exit off the bridge (Indian Rocks, Rt 688) going West on Ulmerton Road. Just past Belcher (but before Starkey) look for the Paradyne campus on the left. Turn left just after the main building, follow signs to Bldg E, check in with guard.