Power-Efficient Video Streaming on Mobile Devices Using Optimal Spatial Scaling

Abstract

This paper derives optimal spatial scaling and rate control parameters for power-efficient wireless video streaming on portable devices. A video streaming application is studied, which receives a high-resolution and high-quality video stream from a remote server and displays the content to the end-user.We show that the resolution of the input video can be adjusted such that the quality-power trade-off is optimized. Making use of a power model from the literature and subjective quality evaluation using a perceptual metric, we derive optimal combinations of the scaling factor and the rate-control parameter for encoding. For HD sequences, up to 10% of power can be saved at negligible quality losses and up to 15% of power can be saved at tolerable distortions. To show general validity, the method was tested for Wi-Fi and a mobile network as well as for two different smartphones.

arXiv comment6 pages, 7 figures

References in corpus (3)

• Modeling the Energy Consumption of the HEVC Decoding Process
• Decoding-Energy-Rate-Distortion Optimization for Video Coding
• Power Modeling for Virtual Reality Video Playback Applications

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• Matched Quality Evaluation of Temporally Downsampled Videos with Non-Integer Factors