how do mp3 players work

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tijoseymathew

Joined: 13 May 2007
Posts: 82
Helped: 1

16 May 2007 4:22 how do mp3 players work

hw do the mp3 players like ipod(itunes) etc.. work
do they have a mp3 decoder chip ???
if so is the chip available in market so that we cud develop our own mp3 players ????
thanks a lot

cameo_2007

Joined: 15 Mar 2007
Posts: 439
Helped: 17
Location: 13.04°N80.17°E

16 May 2007 4:50 Re: how do mp3 players work

http://electronics.howstuffworks.com/mp3-player5.htm

barmak

Joined: 28 Apr 2007
Posts: 69
Helped: 2

16 May 2007 10:55 Re: how do mp3 players work

they have a flash memory and a chip that manage it but asking the question like this on edaboard is not a good idiea try a search engine

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16 May 2007 10:55 Ads

Jepeto

Joined: 09 Oct 2006
Posts: 108
Helped: 9

16 May 2007 13:56 Re: how do mp3 players work

some mp3 projects

http://www.pjrc.com/tech/mp3/index.html
http://www.utdallas.edu/~erice/mp3project.html
http://www.mp3project.org/
http://www.robs-projects.com/mp3proj/newplayer.html
http://www.themp3players.com/archives/2005/07/diy-mp3-player/

tijoseymathew

Joined: 13 May 2007
Posts: 82
Helped: 1

17 May 2007 4:48 how do mp3 players work

cant a code(to a microcontroller) be written which can decode data and get audio out.
why is it that specialised chips have to be used ??

cameo_2007

Joined: 15 Mar 2007
Posts: 439
Helped: 17
Location: 13.04°N80.17°E

17 May 2007 5:45 how do mp3 players work

microcontroller alone cant do the job.It can only process hex/binary datas.It cant recieve an mp3 data, decode it and play the music.it is not meant for that purpose.It is a general purpose device where in you can embedd your codes for a particular application.

But those chips are ASIc.application specific..They'll have inbuilt dacs,adcs codec algorithms etc and other related stuffs for coding and decoding music.

djones

Joined: 06 Dec 2006
Posts: 358
Helped: 1

17 May 2007 10:02 how do mp3 players work

A digital audio player (DAP) is a device that stores, organizes and plays digital music files. It is more commonly referred to as an MP3 player (because of the MP3 format's ubiquity), but DAPs often play many additional file formats. Some formats are proprietary, such as Windows Media Audio (WMA), and to a degree, Advanced Audio Coding (AAC) and MP3. Some of these formats also may incorporate restrictive DRM technology, such as Janus and FairPlay, which are often part of certain paid download sites. Other formats are completely patent-free or otherwise open, such as Ogg Vorbis, FLAC, Speex (all part of the Ogg open multimedia project), and Module file formats. There are three main types of digital audio players:

* Flash-based Players - These are solid state devices that hold digital audio files on internal or external media, such as memory cards. Due to technological limitations, these are relatively low-storage devices, commercially ranging from 128MB to 8GB, such as the 2nd generation iPod nano, the SanDisk Sansa series of players, and the iriver clix, which can often be extended with additional memory. As they are solid state and do not have moving parts, they are very resilient. In effect, they do not suffer limitations that owners of Hard Drive-based players face, such as fears of dropping their player or fragmentation. Such players are commonly integrated into USB keydrives.
* Hard Drive-based Players or Digital Jukeboxes - Devices that read digital audio files from a hard drive. These players have higher capacities, ranging from 1.5GB to 160GB, depending on the hard drive technology. At typical encoding rates, this means that thousands of songs — perhaps an entire music collection — can be stored in one MP3 player. Because of the storage capacity, devices that also display video and pictures are often hard-drive based.
* MP3 CD Players - Devices that can play audio files from a CD-ROM in addition to audio CDs.