Adaptive Disk Power Management for Portable Media Players

Title
Adaptive Disk Power Management for Portable Media Players
Authors
Go, J.; Song, M.
Keywords
Portable Media Player, Disk Power Consumption
Issue Date
2008-11
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Abstract
To support the large storage requirements, consumer electronics for video playback are increasingly being equipped with hard disk drives (HDD) that consume a significant amount of energy,. A video player may prefetch many frames to give disk an opportunity to go to standby mode, but. This may cause playback to be distorted or stopped if timely power mode transitions are not incorporated. We present the design, implementation and evaluation of a data prefetching scheme for energy-aware video data retrieval for pot-table media players (PMP). We formulate the problem when the prefetching is used for variable-bit-rate (VBR) streams to reduce disk energy consumption and then propose a new energy-aware data retrieval scheme that prefetches video data in a just-in-time way so as to increase the period in which disk stays in standby, mode while guaranteeing the real-time service. We implemented our scheme in the legacy video player called Mplayer that is typically used for Linux-based consumer devices. Experimental results show that it saves energy as much as 51% compared with conventional schemes.
URI
http://dspace.inha.ac.kr/handle/10505/1887
ISSN
0098-3063
Appears in Collections:
College of Information Technology & Engineering (IT공과대학) > Computer and Information Engineering (컴퓨터정보공학) > Journal Papers, Reports(컴퓨터정보공학 논문, 보고서)
Files in This Item:
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