Extending the lifetime of media recorders constrained by battery and flash memory size

Younghyun Kim, Youngjin Cho, Naehyuck Chang, Chaitali Chakrabarti, Nam Ik Cho

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

The lifetime of a stand-alone media recorder is a function of both the battery size and flash memory size. In this paper, we present a power management framework for media recorders that significantly enhances their lifetime while minimizing the flash memory usage and maintaining the same level of recording quality. This is achieved by implementing a mixture of encoding algorithms of different complexities that generate data with different compression ratios, and in turn balancing the energy consumption and the flash memory usage. The proposed method can be effectively employed on a direct battery drive system which does not use a DC-DC converter. The gradual drop of the battery voltage of such system is compensated by operating algorithms of lower complexity more and more. For a speech encoding application where a mixture of ADPCM (low complexity) and MP3 (high complexity) is used, the proposed algorithm achieves 70% more lifetime than a DC-DC converter with a highest clock frequency, and 20% more lifetime than even a DC-DC converter with the optimal clock frequency.

Original languageEnglish (US)
Title of host publicationISLPED'08
Subtitle of host publicationProceedings of the 2008 International Symposium on Low Power Electronics and Design
Pages159-164
Number of pages6
DOIs
StatePublished - Dec 17 2008
EventISLPED'08: 13th ACM/IEEE International Symposium on Low Power Electronics and Design - Bangalore, India
Duration: Aug 11 2008Aug 13 2008

Publication series

NameProceedings of the International Symposium on Low Power Electronics and Design
ISSN (Print)1533-4678

Other

OtherISLPED'08: 13th ACM/IEEE International Symposium on Low Power Electronics and Design
CountryIndia
CityBangalore
Period8/11/088/13/08

Keywords

  • Dynamic voltage scaling
  • Multimedia
  • Passive voltage scaling

ASJC Scopus subject areas

  • Engineering(all)

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  • Cite this

    Kim, Y., Cho, Y., Chang, N., Chakrabarti, C., & Cho, N. I. (2008). Extending the lifetime of media recorders constrained by battery and flash memory size. In ISLPED'08: Proceedings of the 2008 International Symposium on Low Power Electronics and Design (pp. 159-164). (Proceedings of the International Symposium on Low Power Electronics and Design). https://doi.org/10.1145/1393921.1393964