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http://dx.doi.org/10.3837/tiis.2012.09.017

On Rate-adaptive LDPC-based Cross-layer SVC over Bursty Wireless Channels  

Cho, Yongju (Electronics and Telecommunications Research Institute (ETRI))
Cha, Jihun (Electronics and Telecommunications Research Institute (ETRI))
Radha, Hayder (Michigan State University)
Seo, Kwang-Deok (Yonsei University)
Publication Information
KSII Transactions on Internet and Information Systems (TIIS) / v.6, no.9, 2012 , pp. 2266-2284 More about this Journal
Abstract
Recent studies have indicated that a significant improvement in wireless video throughput can be achieved by Cross Layer Design with Side-information (CLDS) protocols. In this paper, we derive the operational rate of a CLDS protocol operating over a realistic wireless channel. Then, a Rate-Distortion (R-D) empirical model for above-capacity Scalable Video Coding (SVC) is deduced to estimate the loss of video quality incurred under inaccurate rate estimation scenarios. Finally, we develop a novel Unequal Error Protection (UEP) scheme which leverages the characteristics of LDPC codes to reduce the distortion of video quality in case of typically-observed burst wireless errors. The efficacy of the proposed rate adaptation architecture over conventional protocols is demonstrated by realistic video simulations using actual IEEE 802.11b wireless traces.
Keywords
Cross-layer design; SVC video adaptation; LDPC code; wireless video;
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