Implementation of Mobile Multimedia Audio System Using PCM

Author

Park, Joon-Hoon ; Park, Min-Kyu

Author_Institution

Dept. of Inf. & Control Eng., Chungju Nat. Univ., Chungju

fYear

2008

fDate

23-25 July 2008

Firstpage

241

Lastpage

244

Abstract

Generally analog amplifierpsilas efficiency is very low and size is too big to use mobile IT devices such as MP3, DVD and PMP. On the other hand, class-D amplifierpsilas ideal efficiency is up to 100%. It has various advantages, for example its THD, heat ratio and noise are very lower level than any other amplifier types. And its size is very compactable apt to mobile IT devices. In this study, a design and implementation method for mobile multimedia audio amplifier system applying secondary battery is proposed. Li-Polymer battery is used as secondary battery and PCM(Protection Circuit Module) for the battery is designed. The presented system in this study is useful and applicable for mobile multimedia audio amplifier system.

Keywords

audio-frequency amplifiers; mobile computing; multimedia systems; secondary cells; Li-Polymer battery; analog amplifier; heat ratio; mobile IT device; mobile multimedia audio amplifier system; protection circuit module; secondary battery; Audio systems; Batteries; Circuit noise; DVD; Digital audio players; Multimedia systems; Noise level; Phase change materials; Portable media players; Signal to noise ratio; PCM; class-D amplifier; mobile system;

fLanguage

English

Publisher

ieee

Conference_Titel

Advanced Language Processing and Web Information Technology, 2008. ALPIT '08. International Conference on

Conference_Location

Dalian Liaoning

Print_ISBN

978-0-7695-3273-8

Type

conf

DOI

10.1109/ALPIT.2008.33

Filename

4584374