Elements of information theory
Elements of information theory
Video Codec Design: Developing Image and Video Compression Systems
Video Codec Design: Developing Image and Video Compression Systems
Introduction to Probability Models, Ninth Edition
Introduction to Probability Models, Ninth Edition
Cross-layer wireless multimedia transmission: challenges, principles, and new paradigms
IEEE Wireless Communications
Hybrid Erasure-Error Protocols for Wireless Video
IEEE Transactions on Multimedia
The throughput of hybrid-ARQ protocols for the Gaussian collision channel
IEEE Transactions on Information Theory
Cross-layer design for wireless networks
IEEE Communications Magazine
PEEC: a channel-adaptive feedback-based error
IEEE Journal on Selected Areas in Communications
H.264/AVC baseline profile decoder complexity analysis
IEEE Transactions on Circuits and Systems for Video Technology
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Real-time video communication over wireless channels is subject to information loss since wireless links are error-prone and susceptible to noise. Popular wireless link-layer protocols, such as retransmission (ARQ) based 802.11 and hybrid ARQ methods provide some level of reliability while largely ignoring the latency issue which is critical for real-time applications. Therefore, they suffer from low throughput (under high-error rates) and large waiting-times leading to serious degradation of video playback quality. In this paper, we develop an analytical framework for video communication which captures the behavior of real-time video traffic at the wireless link-layer while taking into consideration both reliability and latency conditions. Using this framework, we introduce a delay constraint packet embedded error control (DC-PEEC) protocol for wireless link-layer. DC-PEEC ensures reliable and rapid delivery of video packets by employing various channel codes to minimize fluctuations in throughput and provide timely arrival of video. In addition to theoretically analyzing DC-PEEC, the performance of the proposed scheme is analyzed by simulating real-time video communication over "real" channel traces collected on 802.11b WLANs using H.264/AVC JM14.0 video codec. The experimental results demonstrate performance gains of 5-10 dB for different real-time video scenarios.