Rate-distortion optimized unequal loss protection for video transmission over packet erasure channels |
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| Authors: | Yongfei Zhang Shiyin Qin Bo Li Zhihai He |
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| Affiliation: | 1. Beijing Key Laboratory of Digital Media, School of Computer Science and Engineering, Beihang University, Beijing 100191, China;2. State Key Laboratory of Virtual Reality Technology and Systems, Beihang University, Beijing 100191, China;3. School of Automation Science and Electrical Engineering, Beihang University, Beijing 100191, China;4. Department of Electrical and Computer Engineering, University of Missouri, Columbia, MO 65211, USA |
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| Abstract: | Video transmission over networks often suffers from packet loss due to network congestions and stringent end-to-end delay constraints. In this paper, we develop a Rate-Distortion optimized Unequal Loss Protection (RD-ULP) scheme to combat packet loss. Based on packet-level transmission distortion modeling, we estimate the amount of contribution of each video packet to the reconstructed video quality, which defines the priority level of each packet. Unequal amounts of protection are then allocated to different video packets according to their priority levels and the dynamic channel conditions. The proposed RD-ULP resource allocation problem is formulated as a constrained nonlinear optimization problem. An optimization algorithm based on Particle Swarm Optimization (PSO) is then developed to solve the optimal resource allocation problem. Our extensive experimental results demonstrate the effectiveness of the proposed RD-ULP scheme, which outperforms existing methods by up to 2 dB in the reconstructed video quality. |
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| Keywords: | Video transmission Resource allocation Unequal Loss Protection (ULP) Transmission distortion modeling Particle Swarm Optimization (PSO) |
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