MIT Department of Electrical Engineering & Computer Science

SPECIAL SEMINAR

Wednesday, March 1, 1995
Marlar Lounge, Room 37-252 (changed location)

Refreshments at 1:45 PM
Talk at 2:00 PM

Subband Coding, Multiresolution Signal Processing , and Wavelets

Dr. Jelena Kovacevic
AT&T Bell Laboratories

In recent years, a number of applications have emerged, requiring signals to be processed and transmitted at multiple resolutions or multiple rates. These include digital HDTV brodacast, conversions between different standards, digital audio and video coding, storage media with requirements such as random access and fast searches, as well as image data bases with browsing. All of these applications have benefited from an intuitive concept known as multiresolution analysis and processing. Its mathematical framework stems from different fields -- signal processing, computer vision, applied mathematics -- and is known under various guises: multirate filter banks, multiresolution analysis and wavelets. This talk will present some recent work involving multiresolution processing, including filter banks in multiple dimensions, wavelets, and their applications. The problem of joint analysis and design of the filters and quantizers in a subband system will be discussed, as well as adaptive signal processing in time using multiresolution tools. Finally, directions for future research will be indicated.