EECS CSPL SEMINAR SERIES
FALL TERM 1999
Tom Fuja
Prof. Tom Fuja
Electrical Engineering Department
University of Notre Dame
Thursday, December 9
4:30 - 5:30 P.M.
Room 1311 EECS
Joint source-channel coding: The view from the decoder
Abstract-
"Joint source-channel coding" is a catchall phrase to describe
techniques in which the compression function and the error
control function in a communication system are combined in
some way. One problem with joint source-channel coding -
apart from the fact that Claude Shannon said we shouldn't do
it - is that it may sacrifice the modularity that is so
convenient in modern communications. When we compress a
signal, we don't want to have to worry about what kind of
channel it will be communicated over or stored in; indeed,
when we compress it, we may not know how or where it will be
transmitted.
However, if we carry out the source encoding and the channel
encoding independently but permit the decoders to cooperate,
the loss of modularity is less intrusive. The research
described in this talk addresses methods for carrying out
joint source-channel decoding based on maximum a posteriori
(MAP) principles. The focus is on two kinds of
applications: robust transmission of very low bit rate
speech, and joint decoding of sources that have been
compressed with variable length source codes.
Biosketch-
Tom Fuja received his undergraduate education at the University of
Michigan and his graduate education at Cornell University.
He spent eleven years on the faculty of the University of
Maryland, and in 1997-1998 he was program director for
communications research at the National Science Foundation.
In 1998 he joined the faculty of the University of Notre
Dame, where he is an associate professor of electrical
engineering.
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