Mobility

Cross-Layer Wireless Video Adaptation: Tradeoff Between Distortion and Delay

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Executive Summary

Adaptive scheduling is becoming an increasingly important issue in wireless video communications, which are widely used in the industry and academic organizations. However, existing scheduling schemes for real-time video services in wireless networks generally do not take into account the relationship between the transmission delay and video distortion. In this paper, the authors develop and evaluate a delay distortion-aware wireless video scheduling scheme in the framework of cross-layer information adaptation. At first, they construct a general video distortion model according to the observed wireless network parameters, as well as each video sequence's rate-distortion characteristic. Then, they exploit a distortion-aware wireless video scheduling scheme and derive a bound on the asymptotic decay rate of the video distortion.

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