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On Rate-Adaptive LDPC-Based Cross-Layer SVC over Bursty Wireless Channels
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- Authors
- Yongju Cho, Jihun Cha, Hayder Radha, Kwang-deok Seo
- Issue Date
- 2012-09
- Citation
- KSII Transactions on Internet and Information Systems, v.6, no.9, pp.2266-2284
- ISSN
- 1976-7277
- Publisher
- 한국인터넷정보학회
- Language
- English
- Type
- Journal Article
- 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.
- KSP Keywords
- Empirical model, IEEE 802.11b, LDPC Codes, Rate estimation, Rate-Distortion, Scalable Video Coding, Unequal Error Protection(UEP), Video quality, Wireless traces, cross-layer design, rate adaptation