Abstract
Portable media players are increasingly using hard disk drives (HDD) to meet their storage requirements, but HDDs consume a significant amount of energy. Therefore video frames are prefetched into dynamic random access memory (DRAM) to allow the disk to go into low-power mode; but most mobile systems have limited DRAM, so little energy is actually saved in this way. We propose two new energysaving schemes: one improves the utilization of DRAM in storing prefetched frames, and the other extends this approach by making use of auxiliary flash memory. Simulations show that deploying a reasonable amount of auxiliary flash reduces disk energy consumption by up to 86% compared with conventional prefetching schemes1.
| Original language | English |
|---|---|
| Article number | 5373761 |
| Pages (from-to) | 1997-2004 |
| Number of pages | 8 |
| Journal | IEEE Transactions on Consumer Electronics |
| Volume | 55 |
| Issue number | 4 |
| DOIs | |
| State | Published - Nov 2009 |
Bibliographical note
Funding Information:Minseok Song is a corresponding author. This work was supported by the Korea Research Foundation Grant funded by the Korean Government (MOEHRD) (KRF-2007-331-D00355) This work was partly supported by the IT R&D program of MKE/KEIT. [2008-F-045-02]
Keywords
- Disk power consumption
- Flash memory
- Portable media player
- Video playback
