Design of a Mobile Video Streaming System using Adaptive Spatial Resolution Control

An efficient mobile video streaming system needs to cope with unstable network bandwidth and limited battery life. We propose a novel streaming system which jointly considers picture quality, bit-rate and energy consumption. Reducing the spatial resolution of a video, stream adaptively proves to be more efficient in terms of picture quality and proves to be more e energy consumption than conventional rate control using only adjustment of quantization parameter. We apply the same scheme to scalable coding for large-scale mobile video streaming. This extends the adaptation of an SVC stream to lower bit-rates, while maintaining temporal stability. Our approach has been shown to improve picture quality by approximately 0.5dB in low bit-rate conditions, and also reduces energy consumption by more than 50% compared to conventional video streaming(1).