Dear all,
[apologies if you receive multiple posting]

Please mark your calendar.
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Date: 03/06/2015

Time: 12:30 PM - 1:30 PM

Venue: Engineering Building 4201

Speaker: Mengbai Xiao

Title: Content-Adaptive Display Power Saving in Internet Mobile Streaming

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Songqing


Abstract
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Backlight scaling is a technique proposed to reduce the display
panel power consumption by strategically dimming the
backlight. However, for Internet streaming to mobile devices,
a computationally intensive luminance compensation
step must be performed in combination with backlight scaling
to maintain the perceived appearance of video frames.
This step, if done by the CPU, could easily offset the power
savings via backlight dimming. Furthermore, computing the
optimal backlight scaling values requires per-frame luminance
information, which is typically too energy intensive
to compute on mobile devices.
In this talk, I will present Content-Adaptive Display
(CAD) for Internet mobile streaming. CAD uses the mobile
device's GPU rather than the CPU to perform luminance
compensation at reduced power consumption. Optimal
backlight scaling schedule is computed using a more efficient
dynamic programming algorithm than existing work.
We implement CAD within an Android app and use a Monsoon
power meter to measure the real power consumption.
Experiments are conducted on more than 470 randomly selected
YouTube videos, and results show that CAD can effctively
produce power savings.
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Speaker Bio
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Mengbai Xiao is a Ph.D. student of Computer Science Department at George 
Mason University. His research interests incude mobile computing, cloud 
storage, and security.
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