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