NDLI: Reducing disk power consumption in portable media players

Content Provider	IEEE Xplore Digital Library
Author	Minseok Song Wanhyung Ryu Jeong Seop Sim
Copyright Year	2010
Description	Author affiliation: School of Computer Science and Information Engineering, Inha University, Incheon, Korea (Minseok Song; Wanhyung Ryu; Jeong Seop Sim)
Abstract	A video player may prefetch video frames into buffer to allow disk to go into standby mode, which involves complete spindown of the spindle motor. Frequent spindowns, however, affect disk longevity, so it is essential to limit the number of times that disk enters standby mode. We present the design and implementation of a data prefetching scheme that minimizes disk power consumption for a limited number of disk spindowns. We first present a data prefetching model that fully utilizes the available buffer space and analyze how power consumption is affected by the bit-rates of the frames in the buffer. We then formulate the problem that determines when the disk should enter standby mode and provide an optimal solution using dynamic programming. We implemented our algorithm in MPlayer running on the Linux 2.6. Experimental results show that it reduces disk energy consumption by up to $59%^{1}.$
Starting Page	81
Ending Page	89
File Size	339128
Page Count	9
File Format	PDF
ISBN	9781424490844
e-ISBN	9781424490868
DOI	10.1109/ESTMED.2010.5666983
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-10-28
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Energy consumption Prefetching Streaming media Media Data models Decoding Spinning
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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