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Technical Program
Paper Detail
| Paper: | MP-L6.2 |
| Session: | Network-Aware Multimedia Processing and Communications |
| Time: | Monday, October 9, 14:40 - 15:00 |
| Presentation: |
Special Session Lecture
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| Title: |
OPTIMAL UNEQUAL ERROR PROTECTION WITH USER COOPERATION FOR TRANSMISSION OF EMBEDDED SOURCE-CODED IMAGES |
| Authors: |
Andres Kwasinski; University of Maryland | | | | | K. J. Ray Liu; University of Maryland | | |
| Abstract: |
This paper studies the transmission of images encoded using an embedded source encoder over a wireless network allowing user cooperation. A dynamic programming algorithm is applied to optimally allocate to each source coded packet error protection in the form of a choice of channel code and a decision on the use of cooperation. The results show that for degraded source-destination channels, the use of user cooperation on all source coded packets significantly improves the reconstructed quality. As the source-destination channel improves the optimal policy becomes a hybrid that uses user cooperation only for the most important source packets. When the source destination channel is sufficiently good, all source packets are sent without cooperation. Thus, a test is presented to estimate the channels states when cooperation is first used. |
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