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학술지 On Rate-Adaptive LDPC-Based Cross-Layer SVC over Bursty Wireless Channels
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저자
조용주, 차지훈, Hayder Radha, 서광덕
발행일
201209
출처
KSII Transactions on Internet and Information Systems, v.6 no.9, pp.2266-2284
ISSN
1976-7277
출판사
한국인터넷정보학회
DOI
https://dx.doi.org/10.3837/tiis.2012.09.017
협약과제
12ZI1100, 유비쿼터스 인프라 연구, 김봉태
초록
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.
키워드
Cross-layer design, LDPC code, SVC video adaptation, Wireless video
KSP 제안 키워드
Empirical model, IEEE 802.11b, LDPC codes, Rate adaptation, Rate estimation, Scalable Video Coding, Unequal error protection(UEP), Video quality, Wireless traces, cross-layer design, rate-distortion