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Video Transmission Using Packet Visibility
Pamela Cosman
Professor and Vice-Chair, Dept. of ECE
Assoc. Dean, Jacobs School of Engineering
University of California, San Diego
Packets composing a compressed video bitstream do not all have the
same visual importance for the final reconstructed video. For determining the visual importance of
different packets, we have conducted observer experiments, spanning multiple codecs, 2D and 3D video,
SDTV and HDTV, and different error concealment schemes. Based on the human observer data, we construct
a computational packet visibility score. I will first describe the experiments and what we learned about
visibility of packets in different scenarios, and then describe several uses of these visibility scores
in video communications (e.g., unequal error protection).
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Pamela Cosman obtained her B.S. in EE from Caltech in 1987, and her Ph.D. in EE from Stanford University
in 1993. After a postdoc at the University of Minnesota, she joined in 1995 the faculty of Electrical and Computer
Engineering at the University of California, San Diego, where she is currently a Professor and Vice-Chair. She was
the Director (2006-2008) of the Center for Wireless Communications, the Editor-in-Chief (2006-2009) of the IEEE
Journal on Selected Areas in Communications, and is currently the Associate Dean for Students of the Jacobs School
of Engineering. Her research interests are in image and video compression and processing, and wireless communications.
She is a member of Tau Beta Pi and Sigma Xi, and a Fellow of the IEEE.
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