•   When: Wednesday, May 02, 2018 from 01:00 PM to 03:00 PM
•   Speakers: Mengbai Xiao
•   Location: ENGR 4801
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Internet streaming services are one of the most popular entertainment activities on mobile devices. However, the resources on mobile devices are constrained, particularly the inherently limited battery power supply. While the display subsystem and the transmission system consume a major portion of power during a video streaming session, the existing power saving solutions for these two subsystems are either impractical or providing little help. In addition, the emerging 360-degree video streaming service to Virtual Reality (VR) devices over Internet demands prohibitive bandwidth, posing a fundamental challenge against providing a satisfying watching experience.

This dissertation develops a series of content-adaptive display (CAD) power saving systems for the display subsystem, which is based on the backlight scaling technique and the GPU is leveraged to integrate computation intensive tasks. For saving power in the transmission system, adaptive-push and DASH2M are designed and implemented based on HTTP/2, in which both the power efficiency and the user’s quality of experience (QoE) are taken into account. Last, BAS-360^o is devised for achieving efficient bandwidth saving in the emerging 360-degree video streaming.