[CPCC] REMINDER: SEMINAR: Audio Transmission over Tandem Wireless Links 1/25 Monday 10 AM

Ender Ayanoglu ayanoglu at uci.edu
Sun Jan 24 18:36:36 PST 2010

                               CPCC SEMINAR

                  Optimal Audio and Voice Transmission
                      over Tandem Wireless Links


                              Ala Khalifeh

                        January 25, 2010, Monday
                                 10 AM
                        Engineering Gateway 3161


We present an optimization framework for transmitting high quality
audio sequences over error-prone wireless links. Our framework
introduces apparatus and technique to optimally protect a stored audio
sequence transmitted over a wireless link while considering the
packetization overhead of audio frames. Utilizing rate compatible
punctured RS codes and dynamic programming, it identifies the optimal
assignment of parity to audio frames according to their perceptual
importance such that the Segmented SNR of the received audio sequence
is maximized.  Our framework covers two cases. In the first case, a
frame grouping technique is proposed to packetize audio frames and
protect them against temporarily correlated bit errors introduced by a
fading wireless channel. In this case, each packet is treated as a
channel coding codeword. In the second case, a one-dimensional RS
coder is applied vertically to a sequence of horizontally formed
packets associated with an audio sequence in order to protect the
sequence against both bit errors introduced by fading wireless
channels and packet erasures introduced by network buffering.

                          SPEAKER'S BIOGRAPHY

Ala Khalifeh received the B.S. and M.S. degrees in electrical
engineering from the University of Jordan in 2001 and 2004,
respectively.  Since 2005, he has been with the Department of
Electrical Engineering and Computer Science of the University of
California, Irvine where he is currently a Ph.D. candidate.
Mr. Khalifeh was a Fulbright Scholar from 2005-2007. While at UC
Irvine, he received the Alpha Phi Beta Kappa award. Mr. Khalifeh's
research interests are in communications technology and networking
with particular emphasis on optimal resource allocation for audio
and video transmission over wired and wireless networks.

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